kernel-alx/patches-4.9/0243-4.9.144-all-fixes.patch

diff --git a/Makefile b/Makefile
index 8ec52cd19526..c62b2b529724 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 9
-SUBLEVEL = 143
+SUBLEVEL = 144
 EXTRAVERSION =
 NAME = Roaring Lionus
 
@@ -802,6 +802,9 @@ KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 # disable pointer signed / unsigned warnings in gcc 4.0
 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 
+# disable stringop warnings in gcc 8+
+KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
+
 # disable invalid "can't wrap" optimizations for signed / pointers
 KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
 
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index b7b78cb09a37..c7a081c583b9 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -105,7 +105,7 @@ endmenu
 
 choice
 	prompt "ARC Instruction Set"
-	default ISA_ARCOMPACT
+	default ISA_ARCV2
 
 config ISA_ARCOMPACT
 	bool "ARCompact ISA"
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index a3b456008201..fd79faab7892 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -8,7 +8,7 @@
 
 UTS_MACHINE := arc
 
-KBUILD_DEFCONFIG := nsim_700_defconfig
+KBUILD_DEFCONFIG := nsim_hs_defconfig
 
 cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
 cflags-$(CONFIG_ISA_ARCOMPACT)	+= -mA7
diff --git a/arch/arc/configs/axs101_defconfig b/arch/arc/configs/axs101_defconfig
index dd623199bb48..cdb00af5aeac 100644
--- a/arch/arc/configs/axs101_defconfig
+++ b/arch/arc/configs/axs101_defconfig
@@ -15,6 +15,7 @@ CONFIG_PERF_EVENTS=y
 # CONFIG_VM_EVENT_COUNTERS is not set
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set
+CONFIG_ISA_ARCOMPACT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
 CONFIG_MODULE_UNLOAD=y
@@ -96,6 +97,7 @@ CONFIG_VFAT_FS=y
 CONFIG_NTFS_FS=y
 CONFIG_TMPFS=y
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/arc/configs/axs103_defconfig b/arch/arc/configs/axs103_defconfig
index 2e0d7d74b8ee..02c766d2c1e0 100644
--- a/arch/arc/configs/axs103_defconfig
+++ b/arch/arc/configs/axs103_defconfig
@@ -97,6 +97,7 @@ CONFIG_VFAT_FS=y
 CONFIG_NTFS_FS=y
 CONFIG_TMPFS=y
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/arc/configs/axs103_smp_defconfig b/arch/arc/configs/axs103_smp_defconfig
index ec188fca2cc9..8c16093d639f 100644
--- a/arch/arc/configs/axs103_smp_defconfig
+++ b/arch/arc/configs/axs103_smp_defconfig
@@ -98,6 +98,7 @@ CONFIG_VFAT_FS=y
 CONFIG_NTFS_FS=y
 CONFIG_TMPFS=y
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/arc/configs/nps_defconfig b/arch/arc/configs/nps_defconfig
index ede625c76216..397742c6c84e 100644
--- a/arch/arc/configs/nps_defconfig
+++ b/arch/arc/configs/nps_defconfig
@@ -15,6 +15,7 @@ CONFIG_SYSCTL_SYSCALL=y
 CONFIG_EMBEDDED=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_COMPAT_BRK is not set
+CONFIG_ISA_ARCOMPACT=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
@@ -75,6 +76,7 @@ CONFIG_PROC_KCORE=y
 CONFIG_TMPFS=y
 # CONFIG_MISC_FILESYSTEMS is not set
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_ROOT_NFS=y
 CONFIG_DEBUG_INFO=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/arc/configs/nsim_700_defconfig b/arch/arc/configs/nsim_700_defconfig
index df609fce999b..cbc6d068d1f4 100644
--- a/arch/arc/configs/nsim_700_defconfig
+++ b/arch/arc/configs/nsim_700_defconfig
@@ -16,6 +16,7 @@ CONFIG_EMBEDDED=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set
+CONFIG_ISA_ARCOMPACT=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
 # CONFIG_LBDAF is not set
diff --git a/arch/arc/configs/nsimosci_defconfig b/arch/arc/configs/nsimosci_defconfig
index 5680daa65471..d34b838a71c1 100644
--- a/arch/arc/configs/nsimosci_defconfig
+++ b/arch/arc/configs/nsimosci_defconfig
@@ -16,6 +16,7 @@ CONFIG_EMBEDDED=y
 CONFIG_PERF_EVENTS=y
 # CONFIG_SLUB_DEBUG is not set
 # CONFIG_COMPAT_BRK is not set
+CONFIG_ISA_ARCOMPACT=y
 CONFIG_KPROBES=y
 CONFIG_MODULES=y
 # CONFIG_LBDAF is not set
@@ -70,5 +71,6 @@ CONFIG_EXT2_FS_XATTR=y
 CONFIG_TMPFS=y
 # CONFIG_MISC_FILESYSTEMS is not set
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
 # CONFIG_ENABLE_MUST_CHECK is not set
diff --git a/arch/arc/configs/nsimosci_hs_defconfig b/arch/arc/configs/nsimosci_hs_defconfig
index 87decc491c58..e8c7dd703f13 100644
--- a/arch/arc/configs/nsimosci_hs_defconfig
+++ b/arch/arc/configs/nsimosci_hs_defconfig
@@ -69,5 +69,6 @@ CONFIG_EXT2_FS_XATTR=y
 CONFIG_TMPFS=y
 # CONFIG_MISC_FILESYSTEMS is not set
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
 # CONFIG_ENABLE_MUST_CHECK is not set
diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig b/arch/arc/configs/nsimosci_hs_smp_defconfig
index 4d14684dc74a..100d7bf0035b 100644
--- a/arch/arc/configs/nsimosci_hs_smp_defconfig
+++ b/arch/arc/configs/nsimosci_hs_smp_defconfig
@@ -80,6 +80,7 @@ CONFIG_EXT2_FS_XATTR=y
 CONFIG_TMPFS=y
 # CONFIG_MISC_FILESYSTEMS is not set
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
 # CONFIG_ENABLE_MUST_CHECK is not set
 CONFIG_FTRACE=y
diff --git a/arch/arc/configs/tb10x_defconfig b/arch/arc/configs/tb10x_defconfig
index 4c5118384eb5..493966c0dcbe 100644
--- a/arch/arc/configs/tb10x_defconfig
+++ b/arch/arc/configs/tb10x_defconfig
@@ -19,6 +19,7 @@ CONFIG_KALLSYMS_ALL=y
 # CONFIG_AIO is not set
 CONFIG_EMBEDDED=y
 # CONFIG_COMPAT_BRK is not set
+CONFIG_ISA_ARCOMPACT=y
 CONFIG_SLAB=y
 CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
diff --git a/arch/arc/configs/vdk_hs38_defconfig b/arch/arc/configs/vdk_hs38_defconfig
index c0d6a010751a..b1d38afeba70 100644
--- a/arch/arc/configs/vdk_hs38_defconfig
+++ b/arch/arc/configs/vdk_hs38_defconfig
@@ -88,6 +88,7 @@ CONFIG_NTFS_FS=y
 CONFIG_TMPFS=y
 CONFIG_JFFS2_FS=y
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/arc/configs/vdk_hs38_smp_defconfig b/arch/arc/configs/vdk_hs38_smp_defconfig
index 969b206d6c67..2d103f73a265 100644
--- a/arch/arc/configs/vdk_hs38_smp_defconfig
+++ b/arch/arc/configs/vdk_hs38_smp_defconfig
@@ -87,6 +87,7 @@ CONFIG_NTFS_FS=y
 CONFIG_TMPFS=y
 CONFIG_JFFS2_FS=y
 CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_ISO8859_1=y
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h
index d87882513ee3..deee3ac8c29f 100644
--- a/arch/mips/include/asm/syscall.h
+++ b/arch/mips/include/asm/syscall.h
@@ -51,7 +51,7 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
 #ifdef CONFIG_64BIT
 	case 4: case 5: case 6: case 7:
 #ifdef CONFIG_MIPS32_O32
-		if (test_thread_flag(TIF_32BIT_REGS))
+		if (test_tsk_thread_flag(task, TIF_32BIT_REGS))
 			return get_user(*arg, (int *)usp + n);
 		else
 #endif
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
index 0696142048d5..9194b04cb689 100644
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -81,7 +81,7 @@ static struct rt2880_pmx_func pcie_rst_grp[] = {
 };
 static struct rt2880_pmx_func nd_sd_grp[] = {
 	FUNC("nand", MT7620_GPIO_MODE_NAND, 45, 15),
-	FUNC("sd", MT7620_GPIO_MODE_SD, 45, 15)
+	FUNC("sd", MT7620_GPIO_MODE_SD, 47, 13)
 };
 
 static struct rt2880_pmx_group mt7620a_pinmux_data[] = {
diff --git a/arch/x86/include/asm/suspend_64.h b/arch/x86/include/asm/suspend_64.h
index 6136a18152af..2bd96b4df140 100644
--- a/arch/x86/include/asm/suspend_64.h
+++ b/arch/x86/include/asm/suspend_64.h
@@ -42,8 +42,7 @@ struct saved_context {
 	set_debugreg((thread)->debugreg##register, register)
 
 /* routines for saving/restoring kernel state */
-extern int acpi_save_state_mem(void);
-extern char core_restore_code;
-extern char restore_registers;
+extern char core_restore_code[];
+extern char restore_registers[];
 
 #endif /* _ASM_X86_SUSPEND_64_H */
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4bc35ac28d11..fa1b0e3c8a06 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1333,20 +1333,23 @@ static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu, int index)
 static int avic_init_access_page(struct kvm_vcpu *vcpu)
 {
 	struct kvm *kvm = vcpu->kvm;
-	int ret;
+	int ret = 0;
 
+	mutex_lock(&kvm->slots_lock);
 	if (kvm->arch.apic_access_page_done)
-		return 0;
+		goto out;
 
-	ret = x86_set_memory_region(kvm,
-				    APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
-				    APIC_DEFAULT_PHYS_BASE,
-				    PAGE_SIZE);
+	ret = __x86_set_memory_region(kvm,
+				      APIC_ACCESS_PAGE_PRIVATE_MEMSLOT,
+				      APIC_DEFAULT_PHYS_BASE,
+				      PAGE_SIZE);
 	if (ret)
-		return ret;
+		goto out;
 
 	kvm->arch.apic_access_page_done = true;
-	return 0;
+out:
+	mutex_unlock(&kvm->slots_lock);
+	return ret;
 }
 
 static int avic_init_backing_page(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c
index 0cb1dd461529..fef485b789ca 100644
--- a/arch/x86/power/hibernate_64.c
+++ b/arch/x86/power/hibernate_64.c
@@ -126,7 +126,7 @@ static int relocate_restore_code(void)
 	if (!relocated_restore_code)
 		return -ENOMEM;
 
-	memcpy((void *)relocated_restore_code, &core_restore_code, PAGE_SIZE);
+	memcpy((void *)relocated_restore_code, core_restore_code, PAGE_SIZE);
 
 	/* Make the page containing the relocated code executable */
 	pgd = (pgd_t *)__va(read_cr3()) + pgd_index(relocated_restore_code);
@@ -197,8 +197,8 @@ int arch_hibernation_header_save(void *addr, unsigned int max_size)
 
 	if (max_size < sizeof(struct restore_data_record))
 		return -EOVERFLOW;
-	rdr->jump_address = (unsigned long)&restore_registers;
-	rdr->jump_address_phys = __pa_symbol(&restore_registers);
+	rdr->jump_address = (unsigned long)restore_registers;
+	rdr->jump_address_phys = __pa_symbol(restore_registers);
 	rdr->cr3 = restore_cr3;
 	rdr->magic = RESTORE_MAGIC;
 	return 0;
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 49199bd2ab93..80499f421a29 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -302,6 +302,7 @@ struct binder_proc {
 	struct mm_struct *vma_vm_mm;
 	struct task_struct *tsk;
 	struct files_struct *files;
+	struct mutex files_lock;
 	struct hlist_node deferred_work_node;
 	int deferred_work;
 	void *buffer;
@@ -375,20 +376,26 @@ binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
 
 static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
 {
-	struct files_struct *files = proc->files;
 	unsigned long rlim_cur;
 	unsigned long irqs;
+	int ret;
 
-	if (files == NULL)
-		return -ESRCH;
-
-	if (!lock_task_sighand(proc->tsk, &irqs))
-		return -EMFILE;
-
+	mutex_lock(&proc->files_lock);
+	if (proc->files == NULL) {
+		ret = -ESRCH;
+		goto err;
+	}
+	if (!lock_task_sighand(proc->tsk, &irqs)) {
+		ret = -EMFILE;
+		goto err;
+	}
 	rlim_cur = task_rlimit(proc->tsk, RLIMIT_NOFILE);
 	unlock_task_sighand(proc->tsk, &irqs);
 
-	return __alloc_fd(files, 0, rlim_cur, flags);
+	ret = __alloc_fd(proc->files, 0, rlim_cur, flags);
+err:
+	mutex_unlock(&proc->files_lock);
+	return ret;
 }
 
 /*
@@ -397,8 +404,10 @@ static int task_get_unused_fd_flags(struct binder_proc *proc, int flags)
 static void task_fd_install(
 	struct binder_proc *proc, unsigned int fd, struct file *file)
 {
+	mutex_lock(&proc->files_lock);
 	if (proc->files)
 		__fd_install(proc->files, fd, file);
+	mutex_unlock(&proc->files_lock);
 }
 
 /*
@@ -408,9 +417,11 @@ static long task_close_fd(struct binder_proc *proc, unsigned int fd)
 {
 	int retval;
 
-	if (proc->files == NULL)
-		return -ESRCH;
-
+	mutex_lock(&proc->files_lock);
+	if (proc->files == NULL) {
+		retval = -ESRCH;
+		goto err;
+	}
 	retval = __close_fd(proc->files, fd);
 	/* can't restart close syscall because file table entry was cleared */
 	if (unlikely(retval == -ERESTARTSYS ||
@@ -418,7 +429,8 @@ static long task_close_fd(struct binder_proc *proc, unsigned int fd)
 		     retval == -ERESTARTNOHAND ||
 		     retval == -ERESTART_RESTARTBLOCK))
 		retval = -EINTR;
-
+err:
+	mutex_unlock(&proc->files_lock);
 	return retval;
 }
 
@@ -2946,7 +2958,9 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
 	binder_insert_free_buffer(proc, buffer);
 	proc->free_async_space = proc->buffer_size / 2;
 	barrier();
+	mutex_lock(&proc->files_lock);
 	proc->files = get_files_struct(current);
+	mutex_unlock(&proc->files_lock);
 	proc->vma = vma;
 	proc->vma_vm_mm = vma->vm_mm;
 
@@ -2982,6 +2996,7 @@ static int binder_open(struct inode *nodp, struct file *filp)
 		return -ENOMEM;
 	get_task_struct(current->group_leader);
 	proc->tsk = current->group_leader;
+	mutex_init(&proc->files_lock);
 	INIT_LIST_HEAD(&proc->todo);
 	init_waitqueue_head(&proc->wait);
 	proc->default_priority = task_nice(current);
@@ -3220,9 +3235,11 @@ static void binder_deferred_func(struct work_struct *work)
 
 		files = NULL;
 		if (defer & BINDER_DEFERRED_PUT_FILES) {
+			mutex_lock(&proc->files_lock);
 			files = proc->files;
 			if (files)
 				proc->files = NULL;
+			mutex_unlock(&proc->files_lock);
 		}
 
 		if (defer & BINDER_DEFERRED_FLUSH)
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index fb9976254224..fabfeeb537ae 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -556,7 +556,8 @@ int ast_driver_unload(struct drm_device *dev)
 	drm_mode_config_cleanup(dev);
 
 	ast_mm_fini(ast);
-	pci_iounmap(dev->pdev, ast->ioregs);
+	if (ast->ioregs != ast->regs + AST_IO_MM_OFFSET)
+		pci_iounmap(dev->pdev, ast->ioregs);
 	pci_iounmap(dev->pdev, ast->regs);
 	kfree(ast);
 	return 0;
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 6b143514a566..56b2dd9a5b68 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -133,6 +133,7 @@ static int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv)
 
 	lockdep_assert_held_once(&dev->master_mutex);
 
+	WARN_ON(fpriv->is_master);
 	old_master = fpriv->master;
 	fpriv->master = drm_master_create(dev);
 	if (!fpriv->master) {
@@ -161,6 +162,7 @@ out_err:
 	/* drop references and restore old master on failure */
 	drm_master_put(&fpriv->master);
 	fpriv->master = old_master;
+	fpriv->is_master = 0;
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/gma500/mdfld_intel_display.c b/drivers/gpu/drm/gma500/mdfld_intel_display.c
index 92e3f93ee682..06d61e654f59 100644
--- a/drivers/gpu/drm/gma500/mdfld_intel_display.c
+++ b/drivers/gpu/drm/gma500/mdfld_intel_display.c
@@ -99,7 +99,7 @@ void mdfldWaitForPipeEnable(struct drm_device *dev, int pipe)
 	/* Wait for for the pipe enable to take effect. */
 	for (count = 0; count < COUNT_MAX; count++) {
 		temp = REG_READ(map->conf);
-		if ((temp & PIPEACONF_PIPE_STATE) == 1)
+		if (temp & PIPEACONF_PIPE_STATE)
 			break;
 	}
 }
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index e097780752f6..863d030786e5 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1446,8 +1446,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 	}
 
 	/* The CEC module handles HDMI hotplug detection */
-	cec_np = of_find_compatible_node(np->parent, NULL,
-					 "mediatek,mt8173-cec");
+	cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
 	if (!cec_np) {
 		dev_err(dev, "Failed to find CEC node\n");
 		return -EINVAL;
@@ -1457,8 +1456,10 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 	if (!cec_pdev) {
 		dev_err(hdmi->dev, "Waiting for CEC device %s\n",
 			cec_np->full_name);
+		of_node_put(cec_np);
 		return -EPROBE_DEFER;
 	}
+	of_node_put(cec_np);
 	hdmi->cec_dev = &cec_pdev->dev;
 
 	/*
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index d7da1dca765f..b1daf5c16117 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -710,31 +710,26 @@ enum mlx5_ib_width {
 	MLX5_IB_WIDTH_12X	= 1 << 4
 };
 
-static int translate_active_width(struct ib_device *ibdev, u8 active_width,
+static void translate_active_width(struct ib_device *ibdev, u8 active_width,
 				  u8 *ib_width)
 {
 	struct mlx5_ib_dev *dev = to_mdev(ibdev);
-	int err = 0;
 
-	if (active_width & MLX5_IB_WIDTH_1X) {
+	if (active_width & MLX5_IB_WIDTH_1X)
 		*ib_width = IB_WIDTH_1X;
-	} else if (active_width & MLX5_IB_WIDTH_2X) {
-		mlx5_ib_dbg(dev, "active_width %d is not supported by IB spec\n",
-			    (int)active_width);
-		err = -EINVAL;
-	} else if (active_width & MLX5_IB_WIDTH_4X) {
+	else if (active_width & MLX5_IB_WIDTH_4X)
 		*ib_width = IB_WIDTH_4X;
-	} else if (active_width & MLX5_IB_WIDTH_8X) {
+	else if (active_width & MLX5_IB_WIDTH_8X)
 		*ib_width = IB_WIDTH_8X;
-	} else if (active_width & MLX5_IB_WIDTH_12X) {
+	else if (active_width & MLX5_IB_WIDTH_12X)
 		*ib_width = IB_WIDTH_12X;
-	} else {
-		mlx5_ib_dbg(dev, "Invalid active_width %d\n",
+	else {
+		mlx5_ib_dbg(dev, "Invalid active_width %d, setting width to default value: 4x\n",
 			    (int)active_width);
-		err = -EINVAL;
+		*ib_width = IB_WIDTH_4X;
 	}
 
-	return err;
+	return;
 }
 
 static int mlx5_mtu_to_ib_mtu(int mtu)
@@ -842,10 +837,8 @@ static int mlx5_query_hca_port(struct ib_device *ibdev, u8 port,
 	if (err)
 		goto out;
 
-	err = translate_active_width(ibdev, ib_link_width_oper,
-				     &props->active_width);
-	if (err)
-		goto out;
+	translate_active_width(ibdev, ib_link_width_oper, &props->active_width);
+
 	err = mlx5_query_port_ib_proto_oper(mdev, &props->active_speed, port);
 	if (err)
 		goto out;
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index bc6f5bb6c524..d46424d4b71e 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -1110,7 +1110,9 @@ u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
 					 IB_MR_CHECK_SIG_STATUS, &mr_status);
 		if (ret) {
 			pr_err("ib_check_mr_status failed, ret %d\n", ret);
-			goto err;
+			/* Not a lot we can do, return ambiguous guard error */
+			*sector = 0;
+			return 0x1;
 		}
 
 		if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) {
@@ -1138,9 +1140,6 @@ u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
 	}
 
 	return 0;
-err:
-	/* Not alot we can do here, return ambiguous guard error */
-	return 0x1;
 }
 
 void iser_err_comp(struct ib_wc *wc, const char *type)
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 2e52015634f9..f55dcdf99bc5 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -483,18 +483,18 @@ static const u8 xboxone_hori_init[] = {
 };
 
 /*
- * This packet is required for some of the PDP pads to start
+ * This packet is required for most (all?) of the PDP pads to start
  * sending input reports. These pads include: (0x0e6f:0x02ab),
- * (0x0e6f:0x02a4).
+ * (0x0e6f:0x02a4), (0x0e6f:0x02a6).
  */
 static const u8 xboxone_pdp_init1[] = {
 	0x0a, 0x20, 0x00, 0x03, 0x00, 0x01, 0x14
 };
 
 /*
- * This packet is required for some of the PDP pads to start
+ * This packet is required for most (all?) of the PDP pads to start
  * sending input reports. These pads include: (0x0e6f:0x02ab),
- * (0x0e6f:0x02a4).
+ * (0x0e6f:0x02a4), (0x0e6f:0x02a6).
  */
 static const u8 xboxone_pdp_init2[] = {
 	0x06, 0x20, 0x00, 0x02, 0x01, 0x00
@@ -530,12 +530,8 @@ static const struct xboxone_init_packet xboxone_init_packets[] = {
 	XBOXONE_INIT_PKT(0x0e6f, 0x0165, xboxone_hori_init),
 	XBOXONE_INIT_PKT(0x0f0d, 0x0067, xboxone_hori_init),
 	XBOXONE_INIT_PKT(0x0000, 0x0000, xboxone_fw2015_init),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02ab, xboxone_pdp_init1),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02ab, xboxone_pdp_init2),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02a4, xboxone_pdp_init1),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02a4, xboxone_pdp_init2),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02a6, xboxone_pdp_init1),
-	XBOXONE_INIT_PKT(0x0e6f, 0x02a6, xboxone_pdp_init2),
+	XBOXONE_INIT_PKT(0x0e6f, 0x0000, xboxone_pdp_init1),
+	XBOXONE_INIT_PKT(0x0e6f, 0x0000, xboxone_pdp_init2),
 	XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumblebegin_init),
 	XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumblebegin_init),
 	XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumblebegin_init),
diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c
index 795fa353de7c..c64d87442a62 100644
--- a/drivers/input/keyboard/matrix_keypad.c
+++ b/drivers/input/keyboard/matrix_keypad.c
@@ -405,7 +405,7 @@ matrix_keypad_parse_dt(struct device *dev)
 	struct matrix_keypad_platform_data *pdata;
 	struct device_node *np = dev->of_node;
 	unsigned int *gpios;
-	int i, nrow, ncol;
+	int ret, i, nrow, ncol;
 
 	if (!np) {
 		dev_err(dev, "device lacks DT data\n");
@@ -447,12 +447,19 @@ matrix_keypad_parse_dt(struct device *dev)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	for (i = 0; i < pdata->num_row_gpios; i++)
-		gpios[i] = of_get_named_gpio(np, "row-gpios", i);
+	for (i = 0; i < nrow; i++) {
+		ret = of_get_named_gpio(np, "row-gpios", i);
+		if (ret < 0)
+			return ERR_PTR(ret);
+		gpios[i] = ret;
+	}
 
-	for (i = 0; i < pdata->num_col_gpios; i++)
-		gpios[pdata->num_row_gpios + i] =
-			of_get_named_gpio(np, "col-gpios", i);
+	for (i = 0; i < ncol; i++) {
+		ret = of_get_named_gpio(np, "col-gpios", i);
+		if (ret < 0)
+			return ERR_PTR(ret);
+		gpios[nrow + i] = ret;
+	}
 
 	pdata->row_gpios = gpios;
 	pdata->col_gpios = &gpios[pdata->num_row_gpios];
@@ -479,10 +486,8 @@ static int matrix_keypad_probe(struct platform_device *pdev)
 	pdata = dev_get_platdata(&pdev->dev);
 	if (!pdata) {
 		pdata = matrix_keypad_parse_dt(&pdev->dev);
-		if (IS_ERR(pdata)) {
-			dev_err(&pdev->dev, "no platform data defined\n");
+		if (IS_ERR(pdata))
 			return PTR_ERR(pdata);
-		}
 	} else if (!pdata->keymap_data) {
 		dev_err(&pdev->dev, "no keymap data defined\n");
 		return -EINVAL;
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index b3119589a444..471984ec2db0 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -1253,6 +1253,9 @@ static const struct acpi_device_id elan_acpi_id[] = {
 	{ "ELAN0618", 0 },
 	{ "ELAN061C", 0 },
 	{ "ELAN061D", 0 },
+	{ "ELAN061E", 0 },
+	{ "ELAN0620", 0 },
+	{ "ELAN0621", 0 },
 	{ "ELAN0622", 0 },
 	{ "ELAN1000", 0 },
 	{ }
diff --git a/drivers/net/ethernet/qlogic/qed/qed_debug.c b/drivers/net/ethernet/qlogic/qed/qed_debug.c
index 68f19ca57f96..245eb02d0c4e 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_debug.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_debug.c
@@ -3039,10 +3039,10 @@ static u32 qed_grc_dump_big_ram(struct qed_hwfn *p_hwfn,
 		s_big_ram_defs[big_ram_id].num_of_blocks[dev_data->chip_id];
 	ram_size = total_blocks * BIG_RAM_BLOCK_SIZE_DWORDS;
 
-	strncpy(type_name, s_big_ram_defs[big_ram_id].instance_name,
-		strlen(s_big_ram_defs[big_ram_id].instance_name));
-	strncpy(mem_name, s_big_ram_defs[big_ram_id].instance_name,
-		strlen(s_big_ram_defs[big_ram_id].instance_name));
+	strscpy(type_name, s_big_ram_defs[big_ram_id].instance_name,
+		sizeof(type_name));
+	strscpy(mem_name, s_big_ram_defs[big_ram_id].instance_name,
+		sizeof(mem_name));
 
 	/* Dump memory header */
 	offset += qed_grc_dump_mem_hdr(p_hwfn,
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 94a356bbb6b9..61419d1b4543 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -1302,8 +1302,14 @@ int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 	};
 	int rc;
 	u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
-	struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
+	struct wmi_set_appie_cmd *cmd;
 
+	if (len < ie_len) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	cmd = kzalloc(len, GFP_KERNEL);
 	if (!cmd) {
 		rc = -ENOMEM;
 		goto out;
diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index b8ae1dbd4c17..188205a55261 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -135,11 +135,16 @@ EXPORT_SYMBOL_GPL(devm_reset_controller_register);
  * @rstc: reset controller
  *
  * Calling this on a shared reset controller is an error.
+ *
+ * If rstc is NULL it is an optional reset and the function will just
+ * return 0.
  */
 int reset_control_reset(struct reset_control *rstc)
 {
-	if (WARN_ON(IS_ERR_OR_NULL(rstc)) ||
-	    WARN_ON(rstc->shared))
+	if (!rstc)
+		return 0;
+
+	if (WARN_ON(IS_ERR(rstc)))
 		return -EINVAL;
 
 	if (rstc->rcdev->ops->reset)
@@ -159,10 +164,16 @@ EXPORT_SYMBOL_GPL(reset_control_reset);
  *
  * For shared reset controls a driver cannot expect the hw's registers and
  * internal state to be reset, but must be prepared for this to happen.
+ *
+ * If rstc is NULL it is an optional reset and the function will just
+ * return 0.
  */
 int reset_control_assert(struct reset_control *rstc)
 {
-	if (WARN_ON(IS_ERR_OR_NULL(rstc)))
+	if (!rstc)
+		return 0;
+
+	if (WARN_ON(IS_ERR(rstc)))
 		return -EINVAL;
 
 	if (!rstc->rcdev->ops->assert)
@@ -185,10 +196,16 @@ EXPORT_SYMBOL_GPL(reset_control_assert);
  * @rstc: reset controller
  *
  * After calling this function, the reset is guaranteed to be deasserted.
+ *
+ * If rstc is NULL it is an optional reset and the function will just
+ * return 0.
  */
 int reset_control_deassert(struct reset_control *rstc)
 {
-	if (WARN_ON(IS_ERR_OR_NULL(rstc)))
+	if (!rstc)
+		return 0;
+
+	if (WARN_ON(IS_ERR(rstc)))
 		return -EINVAL;
 
 	if (!rstc->rcdev->ops->deassert)
@@ -206,12 +223,15 @@ EXPORT_SYMBOL_GPL(reset_control_deassert);
 /**
  * reset_control_status - returns a negative errno if not supported, a
  * positive value if the reset line is asserted, or zero if the reset
- * line is not asserted.
+ * line is not asserted or if the desc is NULL (optional reset).
  * @rstc: reset controller
  */
 int reset_control_status(struct reset_control *rstc)
 {
-	if (WARN_ON(IS_ERR_OR_NULL(rstc)))
+	if (!rstc)
+		return 0;
+
+	if (WARN_ON(IS_ERR(rstc)))
 		return -EINVAL;
 
 	if (rstc->rcdev->ops->status)
@@ -221,7 +241,7 @@ int reset_control_status(struct reset_control *rstc)
 }
 EXPORT_SYMBOL_GPL(reset_control_status);
 
-static struct reset_control *__reset_control_get(
+static struct reset_control *__reset_control_get_internal(
 				struct reset_controller_dev *rcdev,
 				unsigned int index, int shared)
 {
@@ -254,7 +274,7 @@ static struct reset_control *__reset_control_get(
 	return rstc;
 }
 
-static void __reset_control_put(struct reset_control *rstc)
+static void __reset_control_put_internal(struct reset_control *rstc)
 {
 	lockdep_assert_held(&reset_list_mutex);
 
@@ -268,7 +288,8 @@ static void __reset_control_put(struct reset_control *rstc)
 }
 
 struct reset_control *__of_reset_control_get(struct device_node *node,
-				     const char *id, int index, int shared)
+				     const char *id, int index, bool shared,
+				     bool optional)
 {
 	struct reset_control *rstc;
 	struct reset_controller_dev *r, *rcdev;
@@ -282,14 +303,18 @@ struct reset_control *__of_reset_control_get(struct device_node *node,
 	if (id) {
 		index = of_property_match_string(node,
 						 "reset-names", id);
+		if (index == -EILSEQ)
+			return ERR_PTR(index);
 		if (index < 0)
-			return ERR_PTR(-ENOENT);
+			return optional ? NULL : ERR_PTR(-ENOENT);
 	}
 
 	ret = of_parse_phandle_with_args(node, "resets", "#reset-cells",
 					 index, &args);
-	if (ret)
+	if (ret == -EINVAL)
 		return ERR_PTR(ret);
+	if (ret)
+		return optional ? NULL : ERR_PTR(ret);
 
 	mutex_lock(&reset_list_mutex);
 	rcdev = NULL;
@@ -318,7 +343,7 @@ struct reset_control *__of_reset_control_get(struct device_node *node,
 	}
 
 	/* reset_list_mutex also protects the rcdev's reset_control list */
-	rstc = __reset_control_get(rcdev, rstc_id, shared);
+	rstc = __reset_control_get_internal(rcdev, rstc_id, shared);
 
 	mutex_unlock(&reset_list_mutex);
 
@@ -326,6 +351,17 @@ struct reset_control *__of_reset_control_get(struct device_node *node,
 }
 EXPORT_SYMBOL_GPL(__of_reset_control_get);
 
+struct reset_control *__reset_control_get(struct device *dev, const char *id,
+					  int index, bool shared, bool optional)
+{
+	if (dev->of_node)
+		return __of_reset_control_get(dev->of_node, id, index, shared,
+					      optional);
+
+	return optional ? NULL : ERR_PTR(-EINVAL);
+}
+EXPORT_SYMBOL_GPL(__reset_control_get);
+
 /**
  * reset_control_put - free the reset controller
  * @rstc: reset controller
@@ -333,11 +369,11 @@ EXPORT_SYMBOL_GPL(__of_reset_control_get);
 
 void reset_control_put(struct reset_control *rstc)
 {
-	if (IS_ERR(rstc))
+	if (IS_ERR_OR_NULL(rstc))
 		return;
 
 	mutex_lock(&reset_list_mutex);
-	__reset_control_put(rstc);
+	__reset_control_put_internal(rstc);
 	mutex_unlock(&reset_list_mutex);
 }
 EXPORT_SYMBOL_GPL(reset_control_put);
@@ -348,7 +384,8 @@ static void devm_reset_control_release(struct device *dev, void *res)
 }
 
 struct reset_control *__devm_reset_control_get(struct device *dev,
-				     const char *id, int index, int shared)
+				     const char *id, int index, bool shared,
+				     bool optional)
 {
 	struct reset_control **ptr, *rstc;
 
@@ -357,8 +394,7 @@ struct reset_control *__devm_reset_control_get(struct device *dev,
 	if (!ptr)
 		return ERR_PTR(-ENOMEM);
 
-	rstc = __of_reset_control_get(dev ? dev->of_node : NULL,
-				      id, index, shared);
+	rstc = __reset_control_get(dev, id, index, shared, optional);
 	if (!IS_ERR(rstc)) {
 		*ptr = rstc;
 		devres_add(dev, ptr);
@@ -374,17 +410,18 @@ EXPORT_SYMBOL_GPL(__devm_reset_control_get);
  * device_reset - find reset controller associated with the device
  *                and perform reset
  * @dev: device to be reset by the controller
+ * @optional: whether it is optional to reset the device
  *
- * Convenience wrapper for reset_control_get() and reset_control_reset().
+ * Convenience wrapper for __reset_control_get() and reset_control_reset().
  * This is useful for the common case of devices with single, dedicated reset
  * lines.
  */
-int device_reset(struct device *dev)
+int __device_reset(struct device *dev, bool optional)
 {
 	struct reset_control *rstc;
 	int ret;
 
-	rstc = reset_control_get(dev, NULL);
+	rstc = __reset_control_get(dev, NULL, 0, 0, optional);
 	if (IS_ERR(rstc))
 		return PTR_ERR(rstc);
 
@@ -394,4 +431,4 @@ int device_reset(struct device *dev)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(device_reset);
+EXPORT_SYMBOL_GPL(__device_reset);
diff --git a/drivers/scsi/bfa/bfa_fcbuild.c b/drivers/scsi/bfa/bfa_fcbuild.c
index b8dadc9cc993..d3b00a475aeb 100644
--- a/drivers/scsi/bfa/bfa_fcbuild.c
+++ b/drivers/scsi/bfa/bfa_fcbuild.c
@@ -1250,8 +1250,8 @@ fc_rspnid_build(struct fchs_s *fchs, void *pyld, u32 s_id, u16 ox_id,
 	memset(rspnid, 0, sizeof(struct fcgs_rspnid_req_s));
 
 	rspnid->dap = s_id;
-	rspnid->spn_len = (u8) strlen((char *)name);
-	strncpy((char *)rspnid->spn, (char *)name, rspnid->spn_len);
+	strlcpy(rspnid->spn, name, sizeof(rspnid->spn));
+	rspnid->spn_len = (u8) strlen(rspnid->spn);
 
 	return sizeof(struct fcgs_rspnid_req_s) + sizeof(struct ct_hdr_s);
 }
@@ -1271,8 +1271,8 @@ fc_rsnn_nn_build(struct fchs_s *fchs, void *pyld, u32 s_id,
 	memset(rsnn_nn, 0, sizeof(struct fcgs_rsnn_nn_req_s));
 
 	rsnn_nn->node_name = node_name;
-	rsnn_nn->snn_len = (u8) strlen((char *)name);
-	strncpy((char *)rsnn_nn->snn, (char *)name, rsnn_nn->snn_len);
+	strlcpy(rsnn_nn->snn, name, sizeof(rsnn_nn->snn));
+	rsnn_nn->snn_len = (u8) strlen(rsnn_nn->snn);
 
 	return sizeof(struct fcgs_rsnn_nn_req_s) + sizeof(struct ct_hdr_s);
 }
diff --git a/drivers/scsi/bfa/bfa_fcs.c b/drivers/scsi/bfa/bfa_fcs.c
index 1e7e139d71ea..f602de047087 100644
--- a/drivers/scsi/bfa/bfa_fcs.c
+++ b/drivers/scsi/bfa/bfa_fcs.c
@@ -832,23 +832,23 @@ bfa_fcs_fabric_psymb_init(struct bfa_fcs_fabric_s *fabric)
 	bfa_ioc_get_adapter_model(&fabric->fcs->bfa->ioc, model);
 
 	/* Model name/number */
-	strncpy((char *)&port_cfg->sym_name, model,
-		BFA_FCS_PORT_SYMBNAME_MODEL_SZ);
-	strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-		sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+	strlcpy(port_cfg->sym_name.symname, model,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->sym_name.symname, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
+		BFA_SYMNAME_MAXLEN);
 
 	/* Driver Version */
-	strncat((char *)&port_cfg->sym_name, (char *)driver_info->version,
-		BFA_FCS_PORT_SYMBNAME_VERSION_SZ);
-	strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-		sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+	strlcat(port_cfg->sym_name.symname, driver_info->version,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->sym_name.symname, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
+		BFA_SYMNAME_MAXLEN);
 
 	/* Host machine name */
-	strncat((char *)&port_cfg->sym_name,
-		(char *)driver_info->host_machine_name,
-		BFA_FCS_PORT_SYMBNAME_MACHINENAME_SZ);
-	strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-		sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+	strlcat(port_cfg->sym_name.symname,
+		driver_info->host_machine_name,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->sym_name.symname, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
+		BFA_SYMNAME_MAXLEN);
 
 	/*
 	 * Host OS Info :
@@ -856,24 +856,24 @@ bfa_fcs_fabric_psymb_init(struct bfa_fcs_fabric_s *fabric)
 	 * OS name string and instead copy the entire OS info string (64 bytes).
 	 */
 	if (driver_info->host_os_patch[0] == '\0') {
-		strncat((char *)&port_cfg->sym_name,
-			(char *)driver_info->host_os_name,
-			BFA_FCS_OS_STR_LEN);
-		strncat((char *)&port_cfg->sym_name,
+		strlcat(port_cfg->sym_name.symname,
+			driver_info->host_os_name,
+			BFA_SYMNAME_MAXLEN);
+		strlcat(port_cfg->sym_name.symname,
 			BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+			BFA_SYMNAME_MAXLEN);
 	} else {
-		strncat((char *)&port_cfg->sym_name,
-			(char *)driver_info->host_os_name,
-			BFA_FCS_PORT_SYMBNAME_OSINFO_SZ);
-		strncat((char *)&port_cfg->sym_name,
+		strlcat(port_cfg->sym_name.symname,
+			driver_info->host_os_name,
+			BFA_SYMNAME_MAXLEN);
+		strlcat(port_cfg->sym_name.symname,
 			BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+			BFA_SYMNAME_MAXLEN);
 
 		/* Append host OS Patch Info */
-		strncat((char *)&port_cfg->sym_name,
-			(char *)driver_info->host_os_patch,
-			BFA_FCS_PORT_SYMBNAME_OSPATCH_SZ);
+		strlcat(port_cfg->sym_name.symname,
+			driver_info->host_os_patch,
+			BFA_SYMNAME_MAXLEN);
 	}
 
 	/* null terminate */
@@ -893,26 +893,26 @@ bfa_fcs_fabric_nsymb_init(struct bfa_fcs_fabric_s *fabric)
 	bfa_ioc_get_adapter_model(&fabric->fcs->bfa->ioc, model);
 
 	/* Model name/number */
-	strncpy((char *)&port_cfg->node_sym_name, model,
-		BFA_FCS_PORT_SYMBNAME_MODEL_SZ);
-	strncat((char *)&port_cfg->node_sym_name,
+	strlcpy(port_cfg->node_sym_name.symname, model,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->node_sym_name.symname,
 			BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+			BFA_SYMNAME_MAXLEN);
 
 	/* Driver Version */
-	strncat((char *)&port_cfg->node_sym_name, (char *)driver_info->version,
-		BFA_FCS_PORT_SYMBNAME_VERSION_SZ);
-	strncat((char *)&port_cfg->node_sym_name,
+	strlcat(port_cfg->node_sym_name.symname, (char *)driver_info->version,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->node_sym_name.symname,
 			BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+			BFA_SYMNAME_MAXLEN);
 
 	/* Host machine name */
-	strncat((char *)&port_cfg->node_sym_name,
-		(char *)driver_info->host_machine_name,
-		BFA_FCS_PORT_SYMBNAME_MACHINENAME_SZ);
-	strncat((char *)&port_cfg->node_sym_name,
+	strlcat(port_cfg->node_sym_name.symname,
+		driver_info->host_machine_name,
+		BFA_SYMNAME_MAXLEN);
+	strlcat(port_cfg->node_sym_name.symname,
 			BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
+			BFA_SYMNAME_MAXLEN);
 
 	/* null terminate */
 	port_cfg->node_sym_name.symname[BFA_SYMNAME_MAXLEN - 1] = 0;
diff --git a/drivers/scsi/bfa/bfa_fcs_lport.c b/drivers/scsi/bfa/bfa_fcs_lport.c
index 4ddda72f60e6..eb87949b00c1 100644
--- a/drivers/scsi/bfa/bfa_fcs_lport.c
+++ b/drivers/scsi/bfa/bfa_fcs_lport.c
@@ -2631,10 +2631,10 @@ bfa_fcs_fdmi_get_hbaattr(struct bfa_fcs_lport_fdmi_s *fdmi,
 	bfa_ioc_get_adapter_fw_ver(&port->fcs->bfa->ioc,
 					hba_attr->fw_version);
 
-	strncpy(hba_attr->driver_version, (char *)driver_info->version,
+	strlcpy(hba_attr->driver_version, (char *)driver_info->version,
 		sizeof(hba_attr->driver_version));
 
-	strncpy(hba_attr->os_name, driver_info->host_os_name,
+	strlcpy(hba_attr->os_name, driver_info->host_os_name,
 		sizeof(hba_attr->os_name));
 
 	/*
@@ -2642,23 +2642,23 @@ bfa_fcs_fdmi_get_hbaattr(struct bfa_fcs_lport_fdmi_s *fdmi,
 	 * to the os name along with a separator
 	 */
 	if (driver_info->host_os_patch[0] != '\0') {
-		strncat(hba_attr->os_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
-			sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
-		strncat(hba_attr->os_name, driver_info->host_os_patch,
-				sizeof(driver_info->host_os_patch));
+		strlcat(hba_attr->os_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
+			sizeof(hba_attr->os_name));
+		strlcat(hba_attr->os_name, driver_info->host_os_patch,
+				sizeof(hba_attr->os_name));
 	}
 
 	/* Retrieve the max frame size from the port attr */
 	bfa_fcs_fdmi_get_portattr(fdmi, &fcs_port_attr);
 	hba_attr->max_ct_pyld = fcs_port_attr.max_frm_size;
 
-	strncpy(hba_attr->node_sym_name.symname,
+	strlcpy(hba_attr->node_sym_name.symname,
 		port->port_cfg.node_sym_name.symname, BFA_SYMNAME_MAXLEN);
 	strcpy(hba_attr->vendor_info, "QLogic");
 	hba_attr->num_ports =
 		cpu_to_be32(bfa_ioc_get_nports(&port->fcs->bfa->ioc));
 	hba_attr->fabric_name = port->fabric->lps->pr_nwwn;
-	strncpy(hba_attr->bios_ver, hba_attr->option_rom_ver, BFA_VERSION_LEN);
+	strlcpy(hba_attr->bios_ver, hba_attr->option_rom_ver, BFA_VERSION_LEN);
 
 }
 
@@ -2725,20 +2725,20 @@ bfa_fcs_fdmi_get_portattr(struct bfa_fcs_lport_fdmi_s *fdmi,
 	/*
 	 * OS device Name
 	 */
-	strncpy(port_attr->os_device_name, (char *)driver_info->os_device_name,
+	strlcpy(port_attr->os_device_name, driver_info->os_device_name,
 		sizeof(port_attr->os_device_name));
 
 	/*
 	 * Host name
 	 */
-	strncpy(port_attr->host_name, (char *)driver_info->host_machine_name,
+	strlcpy(port_attr->host_name, driver_info->host_machine_name,
 		sizeof(port_attr->host_name));
 
 	port_attr->node_name = bfa_fcs_lport_get_nwwn(port);
 	port_attr->port_name = bfa_fcs_lport_get_pwwn(port);
 
-	strncpy(port_attr->port_sym_name.symname,
-		(char *)&bfa_fcs_lport_get_psym_name(port), BFA_SYMNAME_MAXLEN);
+	strlcpy(port_attr->port_sym_name.symname,
+		bfa_fcs_lport_get_psym_name(port).symname, BFA_SYMNAME_MAXLEN);
 	bfa_fcs_lport_get_attr(port, &lport_attr);
 	port_attr->port_type = cpu_to_be32(lport_attr.port_type);
 	port_attr->scos = pport_attr.cos_supported;
@@ -3218,7 +3218,7 @@ bfa_fcs_lport_ms_gmal_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
 					rsp_str[gmal_entry->len-1] = 0;
 
 				/* copy IP Address to fabric */
-				strncpy(bfa_fcs_lport_get_fabric_ipaddr(port),
+				strlcpy(bfa_fcs_lport_get_fabric_ipaddr(port),
 					gmal_entry->ip_addr,
 					BFA_FCS_FABRIC_IPADDR_SZ);
 				break;
@@ -4656,21 +4656,13 @@ bfa_fcs_lport_ns_send_rspn_id(void *ns_cbarg, struct bfa_fcxp_s *fcxp_alloced)
 		 * to that of the base port.
 		 */
 
-		strncpy((char *)psymbl,
-			(char *) &
-			(bfa_fcs_lport_get_psym_name
+		strlcpy(symbl,
+			(char *)&(bfa_fcs_lport_get_psym_name
 			 (bfa_fcs_get_base_port(port->fcs))),
-			strlen((char *) &
-			       bfa_fcs_lport_get_psym_name(bfa_fcs_get_base_port
-							  (port->fcs))));
-
-		/* Ensure we have a null terminating string. */
-		((char *)psymbl)[strlen((char *) &
-			bfa_fcs_lport_get_psym_name(bfa_fcs_get_base_port
-						(port->fcs)))] = 0;
-		strncat((char *)psymbl,
-			(char *) &(bfa_fcs_lport_get_psym_name(port)),
-		strlen((char *) &bfa_fcs_lport_get_psym_name(port)));
+			sizeof(symbl));
+
+		strlcat(symbl, (char *)&(bfa_fcs_lport_get_psym_name(port)),
+			sizeof(symbl));
 	} else {
 		psymbl = (u8 *) &(bfa_fcs_lport_get_psym_name(port));
 	}
@@ -5162,7 +5154,6 @@ bfa_fcs_lport_ns_util_send_rspn_id(void *cbarg, struct bfa_fcxp_s *fcxp_alloced)
 	struct fchs_s fchs;
 	struct bfa_fcxp_s *fcxp;
 	u8 symbl[256];
-	u8 *psymbl = &symbl[0];
 	int len;
 
 	/* Avoid sending RSPN in the following states. */
@@ -5192,22 +5183,17 @@ bfa_fcs_lport_ns_util_send_rspn_id(void *cbarg, struct bfa_fcxp_s *fcxp_alloced)
 		 * For Vports, we append the vport's port symbolic name
 		 * to that of the base port.
 		 */
-		strncpy((char *)psymbl, (char *)&(bfa_fcs_lport_get_psym_name
+		strlcpy(symbl, (char *)&(bfa_fcs_lport_get_psym_name
 			(bfa_fcs_get_base_port(port->fcs))),
-			strlen((char *)&bfa_fcs_lport_get_psym_name(
-			bfa_fcs_get_base_port(port->fcs))));
-
-		/* Ensure we have a null terminating string. */
-		((char *)psymbl)[strlen((char *)&bfa_fcs_lport_get_psym_name(
-		 bfa_fcs_get_base_port(port->fcs)))] = 0;
+			sizeof(symbl));
 
-		strncat((char *)psymbl,
+		strlcat(symbl,
 			(char *)&(bfa_fcs_lport_get_psym_name(port)),
-			strlen((char *)&bfa_fcs_lport_get_psym_name(port)));
+			sizeof(symbl));
 	}
 
 	len = fc_rspnid_build(&fchs, bfa_fcxp_get_reqbuf(fcxp),
-			      bfa_fcs_lport_get_fcid(port), 0, psymbl);
+			      bfa_fcs_lport_get_fcid(port), 0, symbl);
 
 	bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
 		      FC_CLASS_3, len, &fchs, NULL, NULL, FC_MAX_PDUSZ, 0);
diff --git a/drivers/scsi/bfa/bfa_ioc.c b/drivers/scsi/bfa/bfa_ioc.c
index a1ada4a31c97..16750416d3c0 100644
--- a/drivers/scsi/bfa/bfa_ioc.c
+++ b/drivers/scsi/bfa/bfa_ioc.c
@@ -2803,7 +2803,7 @@ void
 bfa_ioc_get_adapter_manufacturer(struct bfa_ioc_s *ioc, char *manufacturer)
 {
 	memset((void *)manufacturer, 0, BFA_ADAPTER_MFG_NAME_LEN);
-	strncpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN);
+	strlcpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN);
 }
 
 void
diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c
index 12de292175ef..225883d2aeef 100644
--- a/drivers/scsi/bfa/bfa_svc.c
+++ b/drivers/scsi/bfa/bfa_svc.c
@@ -366,8 +366,8 @@ bfa_plog_str(struct bfa_plog_s *plog, enum bfa_plog_mid mid,
 		lp.eid = event;
 		lp.log_type = BFA_PL_LOG_TYPE_STRING;
 		lp.misc = misc;
-		strncpy(lp.log_entry.string_log, log_str,
-			BFA_PL_STRING_LOG_SZ - 1);
+		strlcpy(lp.log_entry.string_log, log_str,
+			BFA_PL_STRING_LOG_SZ);
 		lp.log_entry.string_log[BFA_PL_STRING_LOG_SZ - 1] = '\0';
 		bfa_plog_add(plog, &lp);
 	}
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index e70410beb83a..389f8ef0b095 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -983,20 +983,20 @@ bfad_start_ops(struct bfad_s *bfad) {
 
 	/* Fill the driver_info info to fcs*/
 	memset(&driver_info, 0, sizeof(driver_info));
-	strncpy(driver_info.version, BFAD_DRIVER_VERSION,
-		sizeof(driver_info.version) - 1);
+	strlcpy(driver_info.version, BFAD_DRIVER_VERSION,
+		sizeof(driver_info.version));
 	if (host_name)
-		strncpy(driver_info.host_machine_name, host_name,
-			sizeof(driver_info.host_machine_name) - 1);
+		strlcpy(driver_info.host_machine_name, host_name,
+			sizeof(driver_info.host_machine_name));
 	if (os_name)
-		strncpy(driver_info.host_os_name, os_name,
-			sizeof(driver_info.host_os_name) - 1);
+		strlcpy(driver_info.host_os_name, os_name,
+			sizeof(driver_info.host_os_name));
 	if (os_patch)
-		strncpy(driver_info.host_os_patch, os_patch,
-			sizeof(driver_info.host_os_patch) - 1);
+		strlcpy(driver_info.host_os_patch, os_patch,
+			sizeof(driver_info.host_os_patch));
 
-	strncpy(driver_info.os_device_name, bfad->pci_name,
-		sizeof(driver_info.os_device_name) - 1);
+	strlcpy(driver_info.os_device_name, bfad->pci_name,
+		sizeof(driver_info.os_device_name));
 
 	/* FCS driver info init */
 	spin_lock_irqsave(&bfad->bfad_lock, flags);
diff --git a/drivers/scsi/bfa/bfad_attr.c b/drivers/scsi/bfa/bfad_attr.c
index 13db3b7bc873..d0a504af5b4f 100644
--- a/drivers/scsi/bfa/bfad_attr.c
+++ b/drivers/scsi/bfa/bfad_attr.c
@@ -843,7 +843,7 @@ bfad_im_symbolic_name_show(struct device *dev, struct device_attribute *attr,
 	char symname[BFA_SYMNAME_MAXLEN];
 
 	bfa_fcs_lport_get_attr(&bfad->bfa_fcs.fabric.bport, &port_attr);
-	strncpy(symname, port_attr.port_cfg.sym_name.symname,
+	strlcpy(symname, port_attr.port_cfg.sym_name.symname,
 			BFA_SYMNAME_MAXLEN);
 	return snprintf(buf, PAGE_SIZE, "%s\n", symname);
 }
diff --git a/drivers/scsi/bfa/bfad_bsg.c b/drivers/scsi/bfa/bfad_bsg.c
index d1ad0208dfe7..a3bd23685824 100644
--- a/drivers/scsi/bfa/bfad_bsg.c
+++ b/drivers/scsi/bfa/bfad_bsg.c
@@ -127,7 +127,7 @@ bfad_iocmd_ioc_get_attr(struct bfad_s *bfad, void *cmd)
 
 	/* fill in driver attr info */
 	strcpy(iocmd->ioc_attr.driver_attr.driver, BFAD_DRIVER_NAME);
-	strncpy(iocmd->ioc_attr.driver_attr.driver_ver,
+	strlcpy(iocmd->ioc_attr.driver_attr.driver_ver,
 		BFAD_DRIVER_VERSION, BFA_VERSION_LEN);
 	strcpy(iocmd->ioc_attr.driver_attr.fw_ver,
 		iocmd->ioc_attr.adapter_attr.fw_ver);
@@ -315,9 +315,9 @@ bfad_iocmd_port_get_attr(struct bfad_s *bfad, void *cmd)
 	iocmd->attr.port_type = port_attr.port_type;
 	iocmd->attr.loopback = port_attr.loopback;
 	iocmd->attr.authfail = port_attr.authfail;
-	strncpy(iocmd->attr.port_symname.symname,
+	strlcpy(iocmd->attr.port_symname.symname,
 		port_attr.port_cfg.sym_name.symname,
-		sizeof(port_attr.port_cfg.sym_name.symname));
+		sizeof(iocmd->attr.port_symname.symname));
 
 	iocmd->status = BFA_STATUS_OK;
 	return 0;
diff --git a/drivers/scsi/csiostor/csio_lnode.c b/drivers/scsi/csiostor/csio_lnode.c
index c00b2ff72b55..be5ee2d37815 100644
--- a/drivers/scsi/csiostor/csio_lnode.c
+++ b/drivers/scsi/csiostor/csio_lnode.c
@@ -238,14 +238,23 @@ csio_osname(uint8_t *buf, size_t buf_len)
 }
 
 static inline void
-csio_append_attrib(uint8_t **ptr, uint16_t type, uint8_t *val, uint16_t len)
+csio_append_attrib(uint8_t **ptr, uint16_t type, void *val, size_t val_len)
 {
+	uint16_t len;
 	struct fc_fdmi_attr_entry *ae = (struct fc_fdmi_attr_entry *)*ptr;
+
+	if (WARN_ON(val_len > U16_MAX))
+		return;
+
+	len = val_len;
+
 	ae->type = htons(type);
 	len += 4;		/* includes attribute type and length */
 	len = (len + 3) & ~3;	/* should be multiple of 4 bytes */
 	ae->len = htons(len);
-	memcpy(ae->value, val, len);
+	memcpy(ae->value, val, val_len);
+	if (len > val_len)
+		memset(ae->value + val_len, 0, len - val_len);
 	*ptr += len;
 }
 
@@ -335,7 +344,7 @@ csio_ln_fdmi_rhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
 	numattrs++;
 	val = htonl(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
 	csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_SUPPORTEDSPEED,
-			   (uint8_t *)&val,
+			   &val,
 			   FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN);
 	numattrs++;
 
@@ -346,23 +355,22 @@ csio_ln_fdmi_rhba_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
 	else
 		val = htonl(CSIO_HBA_PORTSPEED_UNKNOWN);
 	csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED,
-			   (uint8_t *)&val,
-			   FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN);
+			   &val, FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN);
 	numattrs++;
 
 	mfs = ln->ln_sparm.csp.sp_bb_data;
 	csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_MAXFRAMESIZE,
-			   (uint8_t *)&mfs, FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN);
+			   &mfs, sizeof(mfs));
 	numattrs++;
 
 	strcpy(buf, "csiostor");
 	csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_OSDEVICENAME, buf,
-			   (uint16_t)strlen(buf));
+			   strlen(buf));
 	numattrs++;
 
 	if (!csio_hostname(buf, sizeof(buf))) {
 		csio_append_attrib(&pld, FC_FDMI_PORT_ATTR_HOSTNAME,
-				   buf, (uint16_t)strlen(buf));
+				   buf, strlen(buf));
 		numattrs++;
 	}
 	attrib_blk->numattrs = htonl(numattrs);
@@ -444,33 +452,32 @@ csio_ln_fdmi_dprt_cbfn(struct csio_hw *hw, struct csio_ioreq *fdmi_req)
 
 	strcpy(buf, "Chelsio Communications");
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MANUFACTURER, buf,
-			   (uint16_t)strlen(buf));
+			   strlen(buf));
 	numattrs++;
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_SERIALNUMBER,
-			   hw->vpd.sn, (uint16_t)sizeof(hw->vpd.sn));
+			   hw->vpd.sn, sizeof(hw->vpd.sn));
 	numattrs++;
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODEL, hw->vpd.id,
-			   (uint16_t)sizeof(hw->vpd.id));
+			   sizeof(hw->vpd.id));
 	numattrs++;
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MODELDESCRIPTION,
-			   hw->model_desc, (uint16_t)strlen(hw->model_desc));
+			   hw->model_desc, strlen(hw->model_desc));
 	numattrs++;
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_HARDWAREVERSION,
-			   hw->hw_ver, (uint16_t)sizeof(hw->hw_ver));
+			   hw->hw_ver, sizeof(hw->hw_ver));
 	numattrs++;
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_FIRMWAREVERSION,
-			   hw->fwrev_str, (uint16_t)strlen(hw->fwrev_str));
+			   hw->fwrev_str, strlen(hw->fwrev_str));
 	numattrs++;
 
 	if (!csio_osname(buf, sizeof(buf))) {
 		csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_OSNAMEVERSION,
-				   buf, (uint16_t)strlen(buf));
+				   buf, strlen(buf));
 		numattrs++;
 	}
 
 	csio_append_attrib(&pld, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD,
-			   (uint8_t *)&maxpayload,
-			   FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN);
+			   &maxpayload, FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN);
 	len = (uint32_t)(pld - (uint8_t *)cmd);
 	numattrs++;
 	attrib_blk->numattrs = htonl(numattrs);
@@ -1794,6 +1801,8 @@ csio_ln_mgmt_submit_req(struct csio_ioreq *io_req,
 	struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw);
 	int rv;
 
+	BUG_ON(pld_len > pld->len);
+
 	io_req->io_cbfn = io_cbfn;	/* Upper layer callback handler */
 	io_req->fw_handle = (uintptr_t) (io_req);
 	io_req->eq_idx = mgmtm->eq_idx;
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index 43d4b30cbf65..282ea00d0f87 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -33,7 +33,6 @@ struct scsi_dev_info_list_table {
 };
 
 
-static const char spaces[] = "                "; /* 16 of them */
 static unsigned scsi_default_dev_flags;
 static LIST_HEAD(scsi_dev_info_list);
 static char scsi_dev_flags[256];
@@ -298,20 +297,13 @@ static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
 	size_t from_length;
 
 	from_length = strlen(from);
-	strncpy(to, from, min(to_length, from_length));
-	if (from_length < to_length) {
-		if (compatible) {
-			/*
-			 * NUL terminate the string if it is short.
-			 */
-			to[from_length] = '\0';
-		} else {
-			/* 
-			 * space pad the string if it is short. 
-			 */
-			strncpy(&to[from_length], spaces,
-				to_length - from_length);
-		}
+	/* this zero-pads the destination */
+	strncpy(to, from, to_length);
+	if (from_length < to_length && !compatible) {
+		/*
+		 * space pad the string if it is short.
+		 */
+		memset(&to[from_length], ' ', to_length - from_length);
 	}
 	if (from_length > to_length)
 		 printk(KERN_WARNING "%s: %s string '%s' is too long\n",
diff --git a/drivers/staging/rts5208/sd.c b/drivers/staging/rts5208/sd.c
index 9e63bdf2afe7..4e233f3e7215 100644
--- a/drivers/staging/rts5208/sd.c
+++ b/drivers/staging/rts5208/sd.c
@@ -4110,12 +4110,6 @@ RTY_SEND_CMD:
 					rtsx_trace(chip);
 					return STATUS_FAIL;
 				}
-
-			} else if (rsp_type == SD_RSP_TYPE_R0) {
-				if ((ptr[3] & 0x1E) != 0x03) {
-					rtsx_trace(chip);
-					return STATUS_FAIL;
-				}
 			}
 		}
 	}
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index 2db68dfe497d..c448225ef5ca 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -131,24 +131,6 @@ static void kgdboc_unregister_kbd(void)
 #define kgdboc_restore_input()
 #endif /* ! CONFIG_KDB_KEYBOARD */
 
-static int kgdboc_option_setup(char *opt)
-{
-	if (!opt) {
-		pr_err("kgdboc: config string not provided\n");
-		return -EINVAL;
-	}
-
-	if (strlen(opt) >= MAX_CONFIG_LEN) {
-		printk(KERN_ERR "kgdboc: config string too long\n");
-		return -ENOSPC;
-	}
-	strcpy(config, opt);
-
-	return 0;
-}
-
-__setup("kgdboc=", kgdboc_option_setup);
-
 static void cleanup_kgdboc(void)
 {
 	if (kgdb_unregister_nmi_console())
@@ -162,15 +144,13 @@ static int configure_kgdboc(void)
 {
 	struct tty_driver *p;
 	int tty_line = 0;
-	int err;
+	int err = -ENODEV;
 	char *cptr = config;
 	struct console *cons;
 
-	err = kgdboc_option_setup(config);
-	if (err || !strlen(config) || isspace(config[0]))
+	if (!strlen(config) || isspace(config[0]))
 		goto noconfig;
 
-	err = -ENODEV;
 	kgdboc_io_ops.is_console = 0;
 	kgdb_tty_driver = NULL;
 
@@ -318,6 +298,25 @@ static struct kgdb_io kgdboc_io_ops = {
 };
 
 #ifdef CONFIG_KGDB_SERIAL_CONSOLE
+static int kgdboc_option_setup(char *opt)
+{
+	if (!opt) {
+		pr_err("config string not provided\n");
+		return -EINVAL;
+	}
+
+	if (strlen(opt) >= MAX_CONFIG_LEN) {
+		pr_err("config string too long\n");
+		return -ENOSPC;
+	}
+	strcpy(config, opt);
+
+	return 0;
+}
+
+__setup("kgdboc=", kgdboc_option_setup);
+
+
 /* This is only available if kgdboc is a built in for early debugging */
 static int __init kgdboc_early_init(char *opt)
 {
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index ff4d6cac7ac0..ab89fa3b4118 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -379,11 +379,10 @@ static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
 			     USB_PORT_STAT_CONNECTION) == 0)
 				dum_hcd->port_status |=
 					(USB_PORT_STAT_C_CONNECTION << 16);
-			if ((dum_hcd->port_status &
-			     USB_PORT_STAT_ENABLE) == 1 &&
-				(dum_hcd->port_status &
-				 USB_SS_PORT_LS_U0) == 1 &&
-				dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
+			if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) &&
+			    (dum_hcd->port_status &
+			     USB_PORT_STAT_LINK_STATE) == USB_SS_PORT_LS_U0 &&
+			    dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
 				dum_hcd->active = 1;
 		}
 	} else {
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 128ce17a80b0..076ccfb44c28 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -9,7 +9,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
 	   export.o tree-log.o free-space-cache.o zlib.o lzo.o \
 	   compression.o delayed-ref.o relocation.o delayed-inode.o scrub.o \
 	   reada.o backref.o ulist.o qgroup.o send.o dev-replace.o raid56.o \
-	   uuid-tree.o props.o hash.o free-space-tree.o
+	   uuid-tree.o props.o hash.o free-space-tree.o tree-checker.o
 
 btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
 btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 86245b884fce..a423c36bcd72 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1415,7 +1415,7 @@ do {                                                                   \
 #define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)
 
 struct btrfs_map_token {
-	struct extent_buffer *eb;
+	const struct extent_buffer *eb;
 	char *kaddr;
 	unsigned long offset;
 };
@@ -1449,18 +1449,19 @@ static inline void btrfs_init_map_token (struct btrfs_map_token *token)
 			   sizeof(((type *)0)->member)))
 
 #define DECLARE_BTRFS_SETGET_BITS(bits)					\
-u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr,	\
-			       unsigned long off,			\
-                              struct btrfs_map_token *token);		\
-void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr,	\
+u##bits btrfs_get_token_##bits(const struct extent_buffer *eb,		\
+			       const void *ptr, unsigned long off,	\
+			       struct btrfs_map_token *token);		\
+void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr,	\
 			    unsigned long off, u##bits val,		\
 			    struct btrfs_map_token *token);		\
-static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
+static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb,	\
+				       const void *ptr,			\
 				       unsigned long off)		\
 {									\
 	return btrfs_get_token_##bits(eb, ptr, off, NULL);		\
 }									\
-static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
+static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\
 				    unsigned long off, u##bits val)	\
 {									\
        btrfs_set_token_##bits(eb, ptr, off, val, NULL);			\
@@ -1472,7 +1473,8 @@ DECLARE_BTRFS_SETGET_BITS(32)
 DECLARE_BTRFS_SETGET_BITS(64)
 
 #define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
-static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s)	\
+static inline u##bits btrfs_##name(const struct extent_buffer *eb,	\
+				   const type *s)			\
 {									\
 	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
 	return btrfs_get_##bits(eb, s, offsetof(type, member));		\
@@ -1483,7 +1485,8 @@ static inline void btrfs_set_##name(struct extent_buffer *eb, type *s,	\
 	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
 	btrfs_set_##bits(eb, s, offsetof(type, member), val);		\
 }									\
-static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
+static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\
+					 const type *s,			\
 					 struct btrfs_map_token *token)	\
 {									\
 	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
@@ -1498,9 +1501,9 @@ static inline void btrfs_set_token_##name(struct extent_buffer *eb,	\
 }
 
 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
-static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
+static inline u##bits btrfs_##name(const struct extent_buffer *eb)	\
 {									\
-	type *p = page_address(eb->pages[0]);				\
+	const type *p = page_address(eb->pages[0]);			\
 	u##bits res = le##bits##_to_cpu(p->member);			\
 	return res;							\
 }									\
@@ -1512,7 +1515,7 @@ static inline void btrfs_set_##name(struct extent_buffer *eb,		\
 }
 
 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits)		\
-static inline u##bits btrfs_##name(type *s)				\
+static inline u##bits btrfs_##name(const type *s)			\
 {									\
 	return le##bits##_to_cpu(s->member);				\
 }									\
@@ -1818,7 +1821,7 @@ static inline unsigned long btrfs_node_key_ptr_offset(int nr)
 		sizeof(struct btrfs_key_ptr) * nr;
 }
 
-void btrfs_node_key(struct extent_buffer *eb,
+void btrfs_node_key(const struct extent_buffer *eb,
 		    struct btrfs_disk_key *disk_key, int nr);
 
 static inline void btrfs_set_node_key(struct extent_buffer *eb,
@@ -1847,28 +1850,28 @@ static inline struct btrfs_item *btrfs_item_nr(int nr)
 	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
 }
 
-static inline u32 btrfs_item_end(struct extent_buffer *eb,
+static inline u32 btrfs_item_end(const struct extent_buffer *eb,
 				 struct btrfs_item *item)
 {
 	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
 }
 
-static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
+static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr)
 {
 	return btrfs_item_end(eb, btrfs_item_nr(nr));
 }
 
-static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
+static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
 {
 	return btrfs_item_offset(eb, btrfs_item_nr(nr));
 }
 
-static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
+static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr)
 {
 	return btrfs_item_size(eb, btrfs_item_nr(nr));
 }
 
-static inline void btrfs_item_key(struct extent_buffer *eb,
+static inline void btrfs_item_key(const struct extent_buffer *eb,
 			   struct btrfs_disk_key *disk_key, int nr)
 {
 	struct btrfs_item *item = btrfs_item_nr(nr);
@@ -1904,8 +1907,8 @@ BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
 			 transid, 64);
 
-static inline void btrfs_dir_item_key(struct extent_buffer *eb,
-				      struct btrfs_dir_item *item,
+static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
+				      const struct btrfs_dir_item *item,
 				      struct btrfs_disk_key *key)
 {
 	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
@@ -1913,7 +1916,7 @@ static inline void btrfs_dir_item_key(struct extent_buffer *eb,
 
 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
 					  struct btrfs_dir_item *item,
-					  struct btrfs_disk_key *key)
+					  const struct btrfs_disk_key *key)
 {
 	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
 }
@@ -1925,8 +1928,8 @@ BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
 		   generation, 64);
 
-static inline void btrfs_free_space_key(struct extent_buffer *eb,
-					struct btrfs_free_space_header *h,
+static inline void btrfs_free_space_key(const struct extent_buffer *eb,
+					const struct btrfs_free_space_header *h,
 					struct btrfs_disk_key *key)
 {
 	read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
@@ -1934,7 +1937,7 @@ static inline void btrfs_free_space_key(struct extent_buffer *eb,
 
 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
 					    struct btrfs_free_space_header *h,
-					    struct btrfs_disk_key *key)
+					    const struct btrfs_disk_key *key)
 {
 	write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
 }
@@ -1961,25 +1964,25 @@ static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
 	disk->objectid = cpu_to_le64(cpu->objectid);
 }
 
-static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
-				  struct btrfs_key *key, int nr)
+static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
+					 struct btrfs_key *key, int nr)
 {
 	struct btrfs_disk_key disk_key;
 	btrfs_node_key(eb, &disk_key, nr);
 	btrfs_disk_key_to_cpu(key, &disk_key);
 }
 
-static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
-				  struct btrfs_key *key, int nr)
+static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
+					 struct btrfs_key *key, int nr)
 {
 	struct btrfs_disk_key disk_key;
 	btrfs_item_key(eb, &disk_key, nr);
 	btrfs_disk_key_to_cpu(key, &disk_key);
 }
 
-static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
-				      struct btrfs_dir_item *item,
-				      struct btrfs_key *key)
+static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
+					     const struct btrfs_dir_item *item,
+					     struct btrfs_key *key)
 {
 	struct btrfs_disk_key disk_key;
 	btrfs_dir_item_key(eb, item, &disk_key);
@@ -2012,7 +2015,7 @@ BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
 			 nritems, 32);
 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
 
-static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
+static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
 {
 	return (btrfs_header_flags(eb) & flag) == flag;
 }
@@ -2031,7 +2034,7 @@ static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
 	return (flags & flag) == flag;
 }
 
-static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
+static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
 {
 	u64 flags = btrfs_header_flags(eb);
 	return flags >> BTRFS_BACKREF_REV_SHIFT;
@@ -2051,12 +2054,12 @@ static inline unsigned long btrfs_header_fsid(void)
 	return offsetof(struct btrfs_header, fsid);
 }
 
-static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
+static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb)
 {
 	return offsetof(struct btrfs_header, chunk_tree_uuid);
 }
 
-static inline int btrfs_is_leaf(struct extent_buffer *eb)
+static inline int btrfs_is_leaf(const struct extent_buffer *eb)
 {
 	return btrfs_header_level(eb) == 0;
 }
@@ -2090,12 +2093,12 @@ BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
 			 rtransid, 64);
 
-static inline bool btrfs_root_readonly(struct btrfs_root *root)
+static inline bool btrfs_root_readonly(const struct btrfs_root *root)
 {
 	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
 }
 
-static inline bool btrfs_root_dead(struct btrfs_root *root)
+static inline bool btrfs_root_dead(const struct btrfs_root *root)
 {
 	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
 }
@@ -2152,51 +2155,51 @@ BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
 /* struct btrfs_balance_item */
 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
 
-static inline void btrfs_balance_data(struct extent_buffer *eb,
-				      struct btrfs_balance_item *bi,
+static inline void btrfs_balance_data(const struct extent_buffer *eb,
+				      const struct btrfs_balance_item *bi,
 				      struct btrfs_disk_balance_args *ba)
 {
 	read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
 }
 
 static inline void btrfs_set_balance_data(struct extent_buffer *eb,
-					  struct btrfs_balance_item *bi,
-					  struct btrfs_disk_balance_args *ba)
+				  struct btrfs_balance_item *bi,
+				  const struct btrfs_disk_balance_args *ba)
 {
 	write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
 }
 
-static inline void btrfs_balance_meta(struct extent_buffer *eb,
-				      struct btrfs_balance_item *bi,
+static inline void btrfs_balance_meta(const struct extent_buffer *eb,
+				      const struct btrfs_balance_item *bi,
 				      struct btrfs_disk_balance_args *ba)
 {
 	read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
 }
 
 static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
-					  struct btrfs_balance_item *bi,
-					  struct btrfs_disk_balance_args *ba)
+				  struct btrfs_balance_item *bi,
+				  const struct btrfs_disk_balance_args *ba)
 {
 	write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
 }
 
-static inline void btrfs_balance_sys(struct extent_buffer *eb,
-				     struct btrfs_balance_item *bi,
+static inline void btrfs_balance_sys(const struct extent_buffer *eb,
+				     const struct btrfs_balance_item *bi,
 				     struct btrfs_disk_balance_args *ba)
 {
 	read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
 }
 
 static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
-					 struct btrfs_balance_item *bi,
-					 struct btrfs_disk_balance_args *ba)
+				 struct btrfs_balance_item *bi,
+				 const struct btrfs_disk_balance_args *ba)
 {
 	write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
 }
 
 static inline void
 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
-			       struct btrfs_disk_balance_args *disk)
+			       const struct btrfs_disk_balance_args *disk)
 {
 	memset(cpu, 0, sizeof(*cpu));
 
@@ -2216,7 +2219,7 @@ btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
 
 static inline void
 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
-			       struct btrfs_balance_args *cpu)
+			       const struct btrfs_balance_args *cpu)
 {
 	memset(disk, 0, sizeof(*disk));
 
@@ -2284,7 +2287,7 @@ BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
 			 uuid_tree_generation, 64);
 
-static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
+static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
 {
 	u16 t = btrfs_super_csum_type(s);
 	/*
@@ -2303,8 +2306,8 @@ static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
  * this returns the address of the start of the last item,
  * which is the stop of the leaf data stack
  */
-static inline unsigned int leaf_data_end(struct btrfs_root *root,
-					 struct extent_buffer *leaf)
+static inline unsigned int leaf_data_end(const struct btrfs_root *root,
+					 const struct extent_buffer *leaf)
 {
 	u32 nr = btrfs_header_nritems(leaf);
 
@@ -2329,7 +2332,7 @@ BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
 			 struct btrfs_file_extent_item, compression, 8);
 
 static inline unsigned long
-btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
+btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e)
 {
 	return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
 }
@@ -2363,8 +2366,9 @@ BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
  * size of any extent headers.  If a file is compressed on disk, this is
  * the compressed size
  */
-static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
-						    struct btrfs_item *e)
+static inline u32 btrfs_file_extent_inline_item_len(
+						const struct extent_buffer *eb,
+						struct btrfs_item *e)
 {
 	return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
 }
@@ -2372,9 +2376,9 @@ static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
 /* this returns the number of file bytes represented by the inline item.
  * If an item is compressed, this is the uncompressed size
  */
-static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
-					       int slot,
-					       struct btrfs_file_extent_item *fi)
+static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb,
+					int slot,
+					const struct btrfs_file_extent_item *fi)
 {
 	struct btrfs_map_token token;
 
@@ -2396,8 +2400,8 @@ static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
 
 
 /* btrfs_dev_stats_item */
-static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
-					struct btrfs_dev_stats_item *ptr,
+static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
+					const struct btrfs_dev_stats_item *ptr,
 					int index)
 {
 	u64 val;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 57d375c68e46..77b32415d9f2 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -50,6 +50,7 @@
 #include "sysfs.h"
 #include "qgroup.h"
 #include "compression.h"
+#include "tree-checker.h"
 
 #ifdef CONFIG_X86
 #include <asm/cpufeature.h>
@@ -452,9 +453,9 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 	int mirror_num = 0;
 	int failed_mirror = 0;
 
-	clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 	io_tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
 	while (1) {
+		clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 		ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE,
 					       btree_get_extent, mirror_num);
 		if (!ret) {
@@ -465,14 +466,6 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 				ret = -EIO;
 		}
 
-		/*
-		 * This buffer's crc is fine, but its contents are corrupted, so
-		 * there is no reason to read the other copies, they won't be
-		 * any less wrong.
-		 */
-		if (test_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags))
-			break;
-
 		num_copies = btrfs_num_copies(root->fs_info,
 					      eb->start, eb->len);
 		if (num_copies == 1)
@@ -546,145 +539,6 @@ static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
 	return ret;
 }
 
-#define CORRUPT(reason, eb, root, slot)				\
-	btrfs_crit(root->fs_info, "corrupt %s, %s: block=%llu,"	\
-		   " root=%llu, slot=%d",			\
-		   btrfs_header_level(eb) == 0 ? "leaf" : "node",\
-		   reason, btrfs_header_bytenr(eb), root->objectid, slot)
-
-static noinline int check_leaf(struct btrfs_root *root,
-			       struct extent_buffer *leaf)
-{
-	struct btrfs_key key;
-	struct btrfs_key leaf_key;
-	u32 nritems = btrfs_header_nritems(leaf);
-	int slot;
-
-	/*
-	 * Extent buffers from a relocation tree have a owner field that
-	 * corresponds to the subvolume tree they are based on. So just from an
-	 * extent buffer alone we can not find out what is the id of the
-	 * corresponding subvolume tree, so we can not figure out if the extent
-	 * buffer corresponds to the root of the relocation tree or not. So skip
-	 * this check for relocation trees.
-	 */
-	if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) {
-		struct btrfs_root *check_root;
-
-		key.objectid = btrfs_header_owner(leaf);
-		key.type = BTRFS_ROOT_ITEM_KEY;
-		key.offset = (u64)-1;
-
-		check_root = btrfs_get_fs_root(root->fs_info, &key, false);
-		/*
-		 * The only reason we also check NULL here is that during
-		 * open_ctree() some roots has not yet been set up.
-		 */
-		if (!IS_ERR_OR_NULL(check_root)) {
-			struct extent_buffer *eb;
-
-			eb = btrfs_root_node(check_root);
-			/* if leaf is the root, then it's fine */
-			if (leaf != eb) {
-				CORRUPT("non-root leaf's nritems is 0",
-					leaf, check_root, 0);
-				free_extent_buffer(eb);
-				return -EIO;
-			}
-			free_extent_buffer(eb);
-		}
-		return 0;
-	}
-
-	if (nritems == 0)
-		return 0;
-
-	/* Check the 0 item */
-	if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) !=
-	    BTRFS_LEAF_DATA_SIZE(root)) {
-		CORRUPT("invalid item offset size pair", leaf, root, 0);
-		return -EIO;
-	}
-
-	/*
-	 * Check to make sure each items keys are in the correct order and their
-	 * offsets make sense.  We only have to loop through nritems-1 because
-	 * we check the current slot against the next slot, which verifies the
-	 * next slot's offset+size makes sense and that the current's slot
-	 * offset is correct.
-	 */
-	for (slot = 0; slot < nritems - 1; slot++) {
-		btrfs_item_key_to_cpu(leaf, &leaf_key, slot);
-		btrfs_item_key_to_cpu(leaf, &key, slot + 1);
-
-		/* Make sure the keys are in the right order */
-		if (btrfs_comp_cpu_keys(&leaf_key, &key) >= 0) {
-			CORRUPT("bad key order", leaf, root, slot);
-			return -EIO;
-		}
-
-		/*
-		 * Make sure the offset and ends are right, remember that the
-		 * item data starts at the end of the leaf and grows towards the
-		 * front.
-		 */
-		if (btrfs_item_offset_nr(leaf, slot) !=
-			btrfs_item_end_nr(leaf, slot + 1)) {
-			CORRUPT("slot offset bad", leaf, root, slot);
-			return -EIO;
-		}
-
-		/*
-		 * Check to make sure that we don't point outside of the leaf,
-		 * just in case all the items are consistent to each other, but
-		 * all point outside of the leaf.
-		 */
-		if (btrfs_item_end_nr(leaf, slot) >
-		    BTRFS_LEAF_DATA_SIZE(root)) {
-			CORRUPT("slot end outside of leaf", leaf, root, slot);
-			return -EIO;
-		}
-	}
-
-	return 0;
-}
-
-static int check_node(struct btrfs_root *root, struct extent_buffer *node)
-{
-	unsigned long nr = btrfs_header_nritems(node);
-	struct btrfs_key key, next_key;
-	int slot;
-	u64 bytenr;
-	int ret = 0;
-
-	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) {
-		btrfs_crit(root->fs_info,
-			   "corrupt node: block %llu root %llu nritems %lu",
-			   node->start, root->objectid, nr);
-		return -EIO;
-	}
-
-	for (slot = 0; slot < nr - 1; slot++) {
-		bytenr = btrfs_node_blockptr(node, slot);
-		btrfs_node_key_to_cpu(node, &key, slot);
-		btrfs_node_key_to_cpu(node, &next_key, slot + 1);
-
-		if (!bytenr) {
-			CORRUPT("invalid item slot", node, root, slot);
-			ret = -EIO;
-			goto out;
-		}
-
-		if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
-			CORRUPT("bad key order", node, root, slot);
-			ret = -EIO;
-			goto out;
-		}
-	}
-out:
-	return ret;
-}
-
 static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 				      u64 phy_offset, struct page *page,
 				      u64 start, u64 end, int mirror)
@@ -750,12 +604,12 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 	 * that we don't try and read the other copies of this block, just
 	 * return -EIO.
 	 */
-	if (found_level == 0 && check_leaf(root, eb)) {
+	if (found_level == 0 && btrfs_check_leaf_full(root, eb)) {
 		set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 		ret = -EIO;
 	}
 
-	if (found_level > 0 && check_node(root, eb))
+	if (found_level > 0 && btrfs_check_node(root, eb))
 		ret = -EIO;
 
 	if (!ret)
@@ -4086,7 +3940,13 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 				     buf->len,
 				     root->fs_info->dirty_metadata_batch);
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
-	if (btrfs_header_level(buf) == 0 && check_leaf(root, buf)) {
+	/*
+	 * Since btrfs_mark_buffer_dirty() can be called with item pointer set
+	 * but item data not updated.
+	 * So here we should only check item pointers, not item data.
+	 */
+	if (btrfs_header_level(buf) == 0 &&
+	    btrfs_check_leaf_relaxed(root, buf)) {
 		btrfs_print_leaf(root, buf);
 		ASSERT(0);
 	}
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a775307f3b6b..7938c48c72ff 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -9896,6 +9896,8 @@ static int find_first_block_group(struct btrfs_root *root,
 	int ret = 0;
 	struct btrfs_key found_key;
 	struct extent_buffer *leaf;
+	struct btrfs_block_group_item bg;
+	u64 flags;
 	int slot;
 
 	ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
@@ -9930,8 +9932,32 @@ static int find_first_block_group(struct btrfs_root *root,
 			"logical %llu len %llu found bg but no related chunk",
 					  found_key.objectid, found_key.offset);
 				ret = -ENOENT;
+			} else if (em->start != found_key.objectid ||
+				   em->len != found_key.offset) {
+				btrfs_err(root->fs_info,
+		"block group %llu len %llu mismatch with chunk %llu len %llu",
+					  found_key.objectid, found_key.offset,
+					  em->start, em->len);
+				ret = -EUCLEAN;
 			} else {
-				ret = 0;
+				read_extent_buffer(leaf, &bg,
+					btrfs_item_ptr_offset(leaf, slot),
+					sizeof(bg));
+				flags = btrfs_block_group_flags(&bg) &
+					BTRFS_BLOCK_GROUP_TYPE_MASK;
+
+				if (flags != (em->map_lookup->type &
+					      BTRFS_BLOCK_GROUP_TYPE_MASK)) {
+					btrfs_err(root->fs_info,
+"block group %llu len %llu type flags 0x%llx mismatch with chunk type flags 0x%llx",
+						found_key.objectid,
+						found_key.offset, flags,
+						(BTRFS_BLOCK_GROUP_TYPE_MASK &
+						 em->map_lookup->type));
+					ret = -EUCLEAN;
+				} else {
+					ret = 0;
+				}
 			}
 			free_extent_map(em);
 			goto out;
@@ -10159,6 +10185,62 @@ btrfs_create_block_group_cache(struct btrfs_root *root, u64 start, u64 size)
 	return cache;
 }
 
+
+/*
+ * Iterate all chunks and verify that each of them has the corresponding block
+ * group
+ */
+static int check_chunk_block_group_mappings(struct btrfs_fs_info *fs_info)
+{
+	struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
+	struct extent_map *em;
+	struct btrfs_block_group_cache *bg;
+	u64 start = 0;
+	int ret = 0;
+
+	while (1) {
+		read_lock(&map_tree->map_tree.lock);
+		/*
+		 * lookup_extent_mapping will return the first extent map
+		 * intersecting the range, so setting @len to 1 is enough to
+		 * get the first chunk.
+		 */
+		em = lookup_extent_mapping(&map_tree->map_tree, start, 1);
+		read_unlock(&map_tree->map_tree.lock);
+		if (!em)
+			break;
+
+		bg = btrfs_lookup_block_group(fs_info, em->start);
+		if (!bg) {
+			btrfs_err(fs_info,
+	"chunk start=%llu len=%llu doesn't have corresponding block group",
+				     em->start, em->len);
+			ret = -EUCLEAN;
+			free_extent_map(em);
+			break;
+		}
+		if (bg->key.objectid != em->start ||
+		    bg->key.offset != em->len ||
+		    (bg->flags & BTRFS_BLOCK_GROUP_TYPE_MASK) !=
+		    (em->map_lookup->type & BTRFS_BLOCK_GROUP_TYPE_MASK)) {
+			btrfs_err(fs_info,
+"chunk start=%llu len=%llu flags=0x%llx doesn't match block group start=%llu len=%llu flags=0x%llx",
+				em->start, em->len,
+				em->map_lookup->type & BTRFS_BLOCK_GROUP_TYPE_MASK,
+				bg->key.objectid, bg->key.offset,
+				bg->flags & BTRFS_BLOCK_GROUP_TYPE_MASK);
+			ret = -EUCLEAN;
+			free_extent_map(em);
+			btrfs_put_block_group(bg);
+			break;
+		}
+		start = em->start + em->len;
+		free_extent_map(em);
+		btrfs_put_block_group(bg);
+	}
+	return ret;
+}
+
 int btrfs_read_block_groups(struct btrfs_root *root)
 {
 	struct btrfs_path *path;
@@ -10343,7 +10425,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
 	}
 
 	init_global_block_rsv(info);
-	ret = 0;
+	ret = check_chunk_block_group_mappings(info);
 error:
 	btrfs_free_path(path);
 	return ret;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 5feaef9bcbda..793d4d571d8d 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5442,9 +5442,8 @@ unlock_exit:
 	return ret;
 }
 
-void read_extent_buffer(struct extent_buffer *eb, void *dstv,
-			unsigned long start,
-			unsigned long len)
+void read_extent_buffer(const struct extent_buffer *eb, void *dstv,
+			unsigned long start, unsigned long len)
 {
 	size_t cur;
 	size_t offset;
@@ -5473,9 +5472,9 @@ void read_extent_buffer(struct extent_buffer *eb, void *dstv,
 	}
 }
 
-int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dstv,
-			unsigned long start,
-			unsigned long len)
+int read_extent_buffer_to_user(const struct extent_buffer *eb,
+			       void __user *dstv,
+			       unsigned long start, unsigned long len)
 {
 	size_t cur;
 	size_t offset;
@@ -5515,10 +5514,10 @@ int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dstv,
  * return 1 if the item spans two pages.
  * return -EINVAL otherwise.
  */
-int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
-			       unsigned long min_len, char **map,
-			       unsigned long *map_start,
-			       unsigned long *map_len)
+int map_private_extent_buffer(const struct extent_buffer *eb,
+			      unsigned long start, unsigned long min_len,
+			      char **map, unsigned long *map_start,
+			      unsigned long *map_len)
 {
 	size_t offset = start & (PAGE_SIZE - 1);
 	char *kaddr;
@@ -5552,9 +5551,8 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
 	return 0;
 }
 
-int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
-			  unsigned long start,
-			  unsigned long len)
+int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
+			 unsigned long start, unsigned long len)
 {
 	size_t cur;
 	size_t offset;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index ab31d145227e..9ecdc9584df7 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -396,14 +396,13 @@ static inline void extent_buffer_get(struct extent_buffer *eb)
 	atomic_inc(&eb->refs);
 }
 
-int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv,
-			  unsigned long start,
-			  unsigned long len);
-void read_extent_buffer(struct extent_buffer *eb, void *dst,
+int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
+			 unsigned long start, unsigned long len);
+void read_extent_buffer(const struct extent_buffer *eb, void *dst,
 			unsigned long start,
 			unsigned long len);
-int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst,
-			       unsigned long start,
+int read_extent_buffer_to_user(const struct extent_buffer *eb,
+			       void __user *dst, unsigned long start,
 			       unsigned long len);
 void write_extent_buffer(struct extent_buffer *eb, const void *src,
 			 unsigned long start, unsigned long len);
@@ -428,10 +427,10 @@ void set_extent_buffer_uptodate(struct extent_buffer *eb);
 void clear_extent_buffer_uptodate(struct extent_buffer *eb);
 int extent_buffer_uptodate(struct extent_buffer *eb);
 int extent_buffer_under_io(struct extent_buffer *eb);
-int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
-		      unsigned long min_len, char **map,
-		      unsigned long *map_start,
-		      unsigned long *map_len);
+int map_private_extent_buffer(const struct extent_buffer *eb,
+			      unsigned long offset, unsigned long min_len,
+			      char **map, unsigned long *map_start,
+			      unsigned long *map_len);
 void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
 void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
 void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 5ca0dbb9074d..69a3c11af9d4 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -2464,6 +2464,7 @@ void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
 	struct rb_node *n;
 	int count = 0;
 
+	spin_lock(&ctl->tree_lock);
 	for (n = rb_first(&ctl->free_space_offset); n; n = rb_next(n)) {
 		info = rb_entry(n, struct btrfs_free_space, offset_index);
 		if (info->bytes >= bytes && !block_group->ro)
@@ -2473,6 +2474,7 @@ void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
 			   info->offset, info->bytes,
 		       (info->bitmap) ? "yes" : "no");
 	}
+	spin_unlock(&ctl->tree_lock);
 	btrfs_info(block_group->fs_info, "block group has cluster?: %s",
 	       list_empty(&block_group->cluster_list) ? "no" : "yes");
 	btrfs_info(block_group->fs_info,
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c
index 875c757e73e2..5e2b92d83617 100644
--- a/fs/btrfs/struct-funcs.c
+++ b/fs/btrfs/struct-funcs.c
@@ -50,8 +50,8 @@ static inline void put_unaligned_le8(u8 val, void *p)
  */
 
 #define DEFINE_BTRFS_SETGET_BITS(bits)					\
-u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr,	\
-			       unsigned long off,			\
+u##bits btrfs_get_token_##bits(const struct extent_buffer *eb,		\
+			       const void *ptr, unsigned long off,	\
 			       struct btrfs_map_token *token)		\
 {									\
 	unsigned long part_offset = (unsigned long)ptr;			\
@@ -90,7 +90,8 @@ u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr,	\
 	return res;							\
 }									\
 void btrfs_set_token_##bits(struct extent_buffer *eb,			\
-			    void *ptr, unsigned long off, u##bits val,	\
+			    const void *ptr, unsigned long off,		\
+			    u##bits val,				\
 			    struct btrfs_map_token *token)		\
 {									\
 	unsigned long part_offset = (unsigned long)ptr;			\
@@ -133,7 +134,7 @@ DEFINE_BTRFS_SETGET_BITS(16)
 DEFINE_BTRFS_SETGET_BITS(32)
 DEFINE_BTRFS_SETGET_BITS(64)
 
-void btrfs_node_key(struct extent_buffer *eb,
+void btrfs_node_key(const struct extent_buffer *eb,
 		    struct btrfs_disk_key *disk_key, int nr)
 {
 	unsigned long ptr = btrfs_node_key_ptr_offset(nr);
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
new file mode 100644
index 000000000000..7b69ba78e600
--- /dev/null
+++ b/fs/btrfs/tree-checker.c
@@ -0,0 +1,649 @@
+/*
+ * Copyright (C) Qu Wenruo 2017.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program.
+ */
+
+/*
+ * The module is used to catch unexpected/corrupted tree block data.
+ * Such behavior can be caused either by a fuzzed image or bugs.
+ *
+ * The objective is to do leaf/node validation checks when tree block is read
+ * from disk, and check *every* possible member, so other code won't
+ * need to checking them again.
+ *
+ * Due to the potential and unwanted damage, every checker needs to be
+ * carefully reviewed otherwise so it does not prevent mount of valid images.
+ */
+
+#include "ctree.h"
+#include "tree-checker.h"
+#include "disk-io.h"
+#include "compression.h"
+#include "hash.h"
+#include "volumes.h"
+
+#define CORRUPT(reason, eb, root, slot)					\
+	btrfs_crit(root->fs_info,					\
+		   "corrupt %s, %s: block=%llu, root=%llu, slot=%d",	\
+		   btrfs_header_level(eb) == 0 ? "leaf" : "node",	\
+		   reason, btrfs_header_bytenr(eb), root->objectid, slot)
+
+/*
+ * Error message should follow the following format:
+ * corrupt <type>: <identifier>, <reason>[, <bad_value>]
+ *
+ * @type:	leaf or node
+ * @identifier:	the necessary info to locate the leaf/node.
+ * 		It's recommened to decode key.objecitd/offset if it's
+ * 		meaningful.
+ * @reason:	describe the error
+ * @bad_value:	optional, it's recommened to output bad value and its
+ *		expected value (range).
+ *
+ * Since comma is used to separate the components, only space is allowed
+ * inside each component.
+ */
+
+/*
+ * Append generic "corrupt leaf/node root=%llu block=%llu slot=%d: " to @fmt.
+ * Allows callers to customize the output.
+ */
+__printf(4, 5)
+static void generic_err(const struct btrfs_root *root,
+			const struct extent_buffer *eb, int slot,
+			const char *fmt, ...)
+{
+	struct va_format vaf;
+	va_list args;
+
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	btrfs_crit(root->fs_info,
+		"corrupt %s: root=%llu block=%llu slot=%d, %pV",
+		btrfs_header_level(eb) == 0 ? "leaf" : "node",
+		root->objectid, btrfs_header_bytenr(eb), slot, &vaf);
+	va_end(args);
+}
+
+static int check_extent_data_item(struct btrfs_root *root,
+				  struct extent_buffer *leaf,
+				  struct btrfs_key *key, int slot)
+{
+	struct btrfs_file_extent_item *fi;
+	u32 sectorsize = root->sectorsize;
+	u32 item_size = btrfs_item_size_nr(leaf, slot);
+
+	if (!IS_ALIGNED(key->offset, sectorsize)) {
+		CORRUPT("unaligned key offset for file extent",
+			leaf, root, slot);
+		return -EUCLEAN;
+	}
+
+	fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
+
+	if (btrfs_file_extent_type(leaf, fi) > BTRFS_FILE_EXTENT_TYPES) {
+		CORRUPT("invalid file extent type", leaf, root, slot);
+		return -EUCLEAN;
+	}
+
+	/*
+	 * Support for new compression/encrption must introduce incompat flag,
+	 * and must be caught in open_ctree().
+	 */
+	if (btrfs_file_extent_compression(leaf, fi) > BTRFS_COMPRESS_TYPES) {
+		CORRUPT("invalid file extent compression", leaf, root, slot);
+		return -EUCLEAN;
+	}
+	if (btrfs_file_extent_encryption(leaf, fi)) {
+		CORRUPT("invalid file extent encryption", leaf, root, slot);
+		return -EUCLEAN;
+	}
+	if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
+		/* Inline extent must have 0 as key offset */
+		if (key->offset) {
+			CORRUPT("inline extent has non-zero key offset",
+				leaf, root, slot);
+			return -EUCLEAN;
+		}
+
+		/* Compressed inline extent has no on-disk size, skip it */
+		if (btrfs_file_extent_compression(leaf, fi) !=
+		    BTRFS_COMPRESS_NONE)
+			return 0;
+
+		/* Uncompressed inline extent size must match item size */
+		if (item_size != BTRFS_FILE_EXTENT_INLINE_DATA_START +
+		    btrfs_file_extent_ram_bytes(leaf, fi)) {
+			CORRUPT("plaintext inline extent has invalid size",
+				leaf, root, slot);
+			return -EUCLEAN;
+		}
+		return 0;
+	}
+
+	/* Regular or preallocated extent has fixed item size */
+	if (item_size != sizeof(*fi)) {
+		CORRUPT(
+		"regluar or preallocated extent data item size is invalid",
+			leaf, root, slot);
+		return -EUCLEAN;
+	}
+	if (!IS_ALIGNED(btrfs_file_extent_ram_bytes(leaf, fi), sectorsize) ||
+	    !IS_ALIGNED(btrfs_file_extent_disk_bytenr(leaf, fi), sectorsize) ||
+	    !IS_ALIGNED(btrfs_file_extent_disk_num_bytes(leaf, fi), sectorsize) ||
+	    !IS_ALIGNED(btrfs_file_extent_offset(leaf, fi), sectorsize) ||
+	    !IS_ALIGNED(btrfs_file_extent_num_bytes(leaf, fi), sectorsize)) {
+		CORRUPT(
+		"regular or preallocated extent data item has unaligned value",
+			leaf, root, slot);
+		return -EUCLEAN;
+	}
+
+	return 0;
+}
+
+static int check_csum_item(struct btrfs_root *root, struct extent_buffer *leaf,
+			   struct btrfs_key *key, int slot)
+{
+	u32 sectorsize = root->sectorsize;
+	u32 csumsize = btrfs_super_csum_size(root->fs_info->super_copy);
+
+	if (key->objectid != BTRFS_EXTENT_CSUM_OBJECTID) {
+		CORRUPT("invalid objectid for csum item", leaf, root, slot);
+		return -EUCLEAN;
+	}
+	if (!IS_ALIGNED(key->offset, sectorsize)) {
+		CORRUPT("unaligned key offset for csum item", leaf, root, slot);
+		return -EUCLEAN;
+	}
+	if (!IS_ALIGNED(btrfs_item_size_nr(leaf, slot), csumsize)) {
+		CORRUPT("unaligned csum item size", leaf, root, slot);
+		return -EUCLEAN;
+	}
+	return 0;
+}
+
+/*
+ * Customized reported for dir_item, only important new info is key->objectid,
+ * which represents inode number
+ */
+__printf(4, 5)
+static void dir_item_err(const struct btrfs_root *root,
+			 const struct extent_buffer *eb, int slot,
+			 const char *fmt, ...)
+{
+	struct btrfs_key key;
+	struct va_format vaf;
+	va_list args;
+
+	btrfs_item_key_to_cpu(eb, &key, slot);
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	btrfs_crit(root->fs_info,
+	"corrupt %s: root=%llu block=%llu slot=%d ino=%llu, %pV",
+		btrfs_header_level(eb) == 0 ? "leaf" : "node", root->objectid,
+		btrfs_header_bytenr(eb), slot, key.objectid, &vaf);
+	va_end(args);
+}
+
+static int check_dir_item(struct btrfs_root *root,
+			  struct extent_buffer *leaf,
+			  struct btrfs_key *key, int slot)
+{
+	struct btrfs_dir_item *di;
+	u32 item_size = btrfs_item_size_nr(leaf, slot);
+	u32 cur = 0;
+
+	di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
+	while (cur < item_size) {
+		u32 name_len;
+		u32 data_len;
+		u32 max_name_len;
+		u32 total_size;
+		u32 name_hash;
+		u8 dir_type;
+
+		/* header itself should not cross item boundary */
+		if (cur + sizeof(*di) > item_size) {
+			dir_item_err(root, leaf, slot,
+		"dir item header crosses item boundary, have %zu boundary %u",
+				cur + sizeof(*di), item_size);
+			return -EUCLEAN;
+		}
+
+		/* dir type check */
+		dir_type = btrfs_dir_type(leaf, di);
+		if (dir_type >= BTRFS_FT_MAX) {
+			dir_item_err(root, leaf, slot,
+			"invalid dir item type, have %u expect [0, %u)",
+				dir_type, BTRFS_FT_MAX);
+			return -EUCLEAN;
+		}
+
+		if (key->type == BTRFS_XATTR_ITEM_KEY &&
+		    dir_type != BTRFS_FT_XATTR) {
+			dir_item_err(root, leaf, slot,
+		"invalid dir item type for XATTR key, have %u expect %u",
+				dir_type, BTRFS_FT_XATTR);
+			return -EUCLEAN;
+		}
+		if (dir_type == BTRFS_FT_XATTR &&
+		    key->type != BTRFS_XATTR_ITEM_KEY) {
+			dir_item_err(root, leaf, slot,
+			"xattr dir type found for non-XATTR key");
+			return -EUCLEAN;
+		}
+		if (dir_type == BTRFS_FT_XATTR)
+			max_name_len = XATTR_NAME_MAX;
+		else
+			max_name_len = BTRFS_NAME_LEN;
+
+		/* Name/data length check */
+		name_len = btrfs_dir_name_len(leaf, di);
+		data_len = btrfs_dir_data_len(leaf, di);
+		if (name_len > max_name_len) {
+			dir_item_err(root, leaf, slot,
+			"dir item name len too long, have %u max %u",
+				name_len, max_name_len);
+			return -EUCLEAN;
+		}
+		if (name_len + data_len > BTRFS_MAX_XATTR_SIZE(root)) {
+			dir_item_err(root, leaf, slot,
+			"dir item name and data len too long, have %u max %u",
+				name_len + data_len,
+				BTRFS_MAX_XATTR_SIZE(root));
+			return -EUCLEAN;
+		}
+
+		if (data_len && dir_type != BTRFS_FT_XATTR) {
+			dir_item_err(root, leaf, slot,
+			"dir item with invalid data len, have %u expect 0",
+				data_len);
+			return -EUCLEAN;
+		}
+
+		total_size = sizeof(*di) + name_len + data_len;
+
+		/* header and name/data should not cross item boundary */
+		if (cur + total_size > item_size) {
+			dir_item_err(root, leaf, slot,
+		"dir item data crosses item boundary, have %u boundary %u",
+				cur + total_size, item_size);
+			return -EUCLEAN;
+		}
+
+		/*
+		 * Special check for XATTR/DIR_ITEM, as key->offset is name
+		 * hash, should match its name
+		 */
+		if (key->type == BTRFS_DIR_ITEM_KEY ||
+		    key->type == BTRFS_XATTR_ITEM_KEY) {
+			char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)];
+
+			read_extent_buffer(leaf, namebuf,
+					(unsigned long)(di + 1), name_len);
+			name_hash = btrfs_name_hash(namebuf, name_len);
+			if (key->offset != name_hash) {
+				dir_item_err(root, leaf, slot,
+		"name hash mismatch with key, have 0x%016x expect 0x%016llx",
+					name_hash, key->offset);
+				return -EUCLEAN;
+			}
+		}
+		cur += total_size;
+		di = (struct btrfs_dir_item *)((void *)di + total_size);
+	}
+	return 0;
+}
+
+__printf(4, 5)
+__cold
+static void block_group_err(const struct btrfs_fs_info *fs_info,
+			    const struct extent_buffer *eb, int slot,
+			    const char *fmt, ...)
+{
+	struct btrfs_key key;
+	struct va_format vaf;
+	va_list args;
+
+	btrfs_item_key_to_cpu(eb, &key, slot);
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	btrfs_crit(fs_info,
+	"corrupt %s: root=%llu block=%llu slot=%d bg_start=%llu bg_len=%llu, %pV",
+		btrfs_header_level(eb) == 0 ? "leaf" : "node",
+		btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,
+		key.objectid, key.offset, &vaf);
+	va_end(args);
+}
+
+static int check_block_group_item(struct btrfs_fs_info *fs_info,
+				  struct extent_buffer *leaf,
+				  struct btrfs_key *key, int slot)
+{
+	struct btrfs_block_group_item bgi;
+	u32 item_size = btrfs_item_size_nr(leaf, slot);
+	u64 flags;
+	u64 type;
+
+	/*
+	 * Here we don't really care about alignment since extent allocator can
+	 * handle it.  We care more about the size, as if one block group is
+	 * larger than maximum size, it's must be some obvious corruption.
+	 */
+	if (key->offset > BTRFS_MAX_DATA_CHUNK_SIZE || key->offset == 0) {
+		block_group_err(fs_info, leaf, slot,
+			"invalid block group size, have %llu expect (0, %llu]",
+				key->offset, BTRFS_MAX_DATA_CHUNK_SIZE);
+		return -EUCLEAN;
+	}
+
+	if (item_size != sizeof(bgi)) {
+		block_group_err(fs_info, leaf, slot,
+			"invalid item size, have %u expect %zu",
+				item_size, sizeof(bgi));
+		return -EUCLEAN;
+	}
+
+	read_extent_buffer(leaf, &bgi, btrfs_item_ptr_offset(leaf, slot),
+			   sizeof(bgi));
+	if (btrfs_block_group_chunk_objectid(&bgi) !=
+	    BTRFS_FIRST_CHUNK_TREE_OBJECTID) {
+		block_group_err(fs_info, leaf, slot,
+		"invalid block group chunk objectid, have %llu expect %llu",
+				btrfs_block_group_chunk_objectid(&bgi),
+				BTRFS_FIRST_CHUNK_TREE_OBJECTID);
+		return -EUCLEAN;
+	}
+
+	if (btrfs_block_group_used(&bgi) > key->offset) {
+		block_group_err(fs_info, leaf, slot,
+			"invalid block group used, have %llu expect [0, %llu)",
+				btrfs_block_group_used(&bgi), key->offset);
+		return -EUCLEAN;
+	}
+
+	flags = btrfs_block_group_flags(&bgi);
+	if (hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) > 1) {
+		block_group_err(fs_info, leaf, slot,
+"invalid profile flags, have 0x%llx (%lu bits set) expect no more than 1 bit set",
+			flags & BTRFS_BLOCK_GROUP_PROFILE_MASK,
+			hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK));
+		return -EUCLEAN;
+	}
+
+	type = flags & BTRFS_BLOCK_GROUP_TYPE_MASK;
+	if (type != BTRFS_BLOCK_GROUP_DATA &&
+	    type != BTRFS_BLOCK_GROUP_METADATA &&
+	    type != BTRFS_BLOCK_GROUP_SYSTEM &&
+	    type != (BTRFS_BLOCK_GROUP_METADATA |
+			   BTRFS_BLOCK_GROUP_DATA)) {
+		block_group_err(fs_info, leaf, slot,
+"invalid type, have 0x%llx (%lu bits set) expect either 0x%llx, 0x%llx, 0x%llx or 0x%llx",
+			type, hweight64(type),
+			BTRFS_BLOCK_GROUP_DATA, BTRFS_BLOCK_GROUP_METADATA,
+			BTRFS_BLOCK_GROUP_SYSTEM,
+			BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA);
+		return -EUCLEAN;
+	}
+	return 0;
+}
+
+/*
+ * Common point to switch the item-specific validation.
+ */
+static int check_leaf_item(struct btrfs_root *root,
+			   struct extent_buffer *leaf,
+			   struct btrfs_key *key, int slot)
+{
+	int ret = 0;
+
+	switch (key->type) {
+	case BTRFS_EXTENT_DATA_KEY:
+		ret = check_extent_data_item(root, leaf, key, slot);
+		break;
+	case BTRFS_EXTENT_CSUM_KEY:
+		ret = check_csum_item(root, leaf, key, slot);
+		break;
+	case BTRFS_DIR_ITEM_KEY:
+	case BTRFS_DIR_INDEX_KEY:
+	case BTRFS_XATTR_ITEM_KEY:
+		ret = check_dir_item(root, leaf, key, slot);
+		break;
+	case BTRFS_BLOCK_GROUP_ITEM_KEY:
+		ret = check_block_group_item(root->fs_info, leaf, key, slot);
+		break;
+	}
+	return ret;
+}
+
+static int check_leaf(struct btrfs_root *root, struct extent_buffer *leaf,
+		      bool check_item_data)
+{
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	/* No valid key type is 0, so all key should be larger than this key */
+	struct btrfs_key prev_key = {0, 0, 0};
+	struct btrfs_key key;
+	u32 nritems = btrfs_header_nritems(leaf);
+	int slot;
+
+	if (btrfs_header_level(leaf) != 0) {
+		generic_err(root, leaf, 0,
+			"invalid level for leaf, have %d expect 0",
+			btrfs_header_level(leaf));
+		return -EUCLEAN;
+	}
+
+	/*
+	 * Extent buffers from a relocation tree have a owner field that
+	 * corresponds to the subvolume tree they are based on. So just from an
+	 * extent buffer alone we can not find out what is the id of the
+	 * corresponding subvolume tree, so we can not figure out if the extent
+	 * buffer corresponds to the root of the relocation tree or not. So
+	 * skip this check for relocation trees.
+	 */
+	if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) {
+		u64 owner = btrfs_header_owner(leaf);
+		struct btrfs_root *check_root;
+
+		/* These trees must never be empty */
+		if (owner == BTRFS_ROOT_TREE_OBJECTID ||
+		    owner == BTRFS_CHUNK_TREE_OBJECTID ||
+		    owner == BTRFS_EXTENT_TREE_OBJECTID ||
+		    owner == BTRFS_DEV_TREE_OBJECTID ||
+		    owner == BTRFS_FS_TREE_OBJECTID ||
+		    owner == BTRFS_DATA_RELOC_TREE_OBJECTID) {
+			generic_err(root, leaf, 0,
+			"invalid root, root %llu must never be empty",
+				    owner);
+			return -EUCLEAN;
+		}
+		key.objectid = owner;
+		key.type = BTRFS_ROOT_ITEM_KEY;
+		key.offset = (u64)-1;
+
+		check_root = btrfs_get_fs_root(fs_info, &key, false);
+		/*
+		 * The only reason we also check NULL here is that during
+		 * open_ctree() some roots has not yet been set up.
+		 */
+		if (!IS_ERR_OR_NULL(check_root)) {
+			struct extent_buffer *eb;
+
+			eb = btrfs_root_node(check_root);
+			/* if leaf is the root, then it's fine */
+			if (leaf != eb) {
+				CORRUPT("non-root leaf's nritems is 0",
+					leaf, check_root, 0);
+				free_extent_buffer(eb);
+				return -EUCLEAN;
+			}
+			free_extent_buffer(eb);
+		}
+		return 0;
+	}
+
+	if (nritems == 0)
+		return 0;
+
+	/*
+	 * Check the following things to make sure this is a good leaf, and
+	 * leaf users won't need to bother with similar sanity checks:
+	 *
+	 * 1) key ordering
+	 * 2) item offset and size
+	 *    No overlap, no hole, all inside the leaf.
+	 * 3) item content
+	 *    If possible, do comprehensive sanity check.
+	 *    NOTE: All checks must only rely on the item data itself.
+	 */
+	for (slot = 0; slot < nritems; slot++) {
+		u32 item_end_expected;
+		int ret;
+
+		btrfs_item_key_to_cpu(leaf, &key, slot);
+
+		/* Make sure the keys are in the right order */
+		if (btrfs_comp_cpu_keys(&prev_key, &key) >= 0) {
+			CORRUPT("bad key order", leaf, root, slot);
+			return -EUCLEAN;
+		}
+
+		/*
+		 * Make sure the offset and ends are right, remember that the
+		 * item data starts at the end of the leaf and grows towards the
+		 * front.
+		 */
+		if (slot == 0)
+			item_end_expected = BTRFS_LEAF_DATA_SIZE(root);
+		else
+			item_end_expected = btrfs_item_offset_nr(leaf,
+								 slot - 1);
+		if (btrfs_item_end_nr(leaf, slot) != item_end_expected) {
+			CORRUPT("slot offset bad", leaf, root, slot);
+			return -EUCLEAN;
+		}
+
+		/*
+		 * Check to make sure that we don't point outside of the leaf,
+		 * just in case all the items are consistent to each other, but
+		 * all point outside of the leaf.
+		 */
+		if (btrfs_item_end_nr(leaf, slot) >
+		    BTRFS_LEAF_DATA_SIZE(root)) {
+			CORRUPT("slot end outside of leaf", leaf, root, slot);
+			return -EUCLEAN;
+		}
+
+		/* Also check if the item pointer overlaps with btrfs item. */
+		if (btrfs_item_nr_offset(slot) + sizeof(struct btrfs_item) >
+		    btrfs_item_ptr_offset(leaf, slot)) {
+			CORRUPT("slot overlap with its data", leaf, root, slot);
+			return -EUCLEAN;
+		}
+
+		if (check_item_data) {
+			/*
+			 * Check if the item size and content meet other
+			 * criteria
+			 */
+			ret = check_leaf_item(root, leaf, &key, slot);
+			if (ret < 0)
+				return ret;
+		}
+
+		prev_key.objectid = key.objectid;
+		prev_key.type = key.type;
+		prev_key.offset = key.offset;
+	}
+
+	return 0;
+}
+
+int btrfs_check_leaf_full(struct btrfs_root *root, struct extent_buffer *leaf)
+{
+	return check_leaf(root, leaf, true);
+}
+
+int btrfs_check_leaf_relaxed(struct btrfs_root *root,
+			     struct extent_buffer *leaf)
+{
+	return check_leaf(root, leaf, false);
+}
+
+int btrfs_check_node(struct btrfs_root *root, struct extent_buffer *node)
+{
+	unsigned long nr = btrfs_header_nritems(node);
+	struct btrfs_key key, next_key;
+	int slot;
+	int level = btrfs_header_level(node);
+	u64 bytenr;
+	int ret = 0;
+
+	if (level <= 0 || level >= BTRFS_MAX_LEVEL) {
+		generic_err(root, node, 0,
+			"invalid level for node, have %d expect [1, %d]",
+			level, BTRFS_MAX_LEVEL - 1);
+		return -EUCLEAN;
+	}
+	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) {
+		btrfs_crit(root->fs_info,
+"corrupt node: root=%llu block=%llu, nritems too %s, have %lu expect range [1,%u]",
+			   root->objectid, node->start,
+			   nr == 0 ? "small" : "large", nr,
+			   BTRFS_NODEPTRS_PER_BLOCK(root));
+		return -EUCLEAN;
+	}
+
+	for (slot = 0; slot < nr - 1; slot++) {
+		bytenr = btrfs_node_blockptr(node, slot);
+		btrfs_node_key_to_cpu(node, &key, slot);
+		btrfs_node_key_to_cpu(node, &next_key, slot + 1);
+
+		if (!bytenr) {
+			generic_err(root, node, slot,
+				"invalid NULL node pointer");
+			ret = -EUCLEAN;
+			goto out;
+		}
+		if (!IS_ALIGNED(bytenr, root->sectorsize)) {
+			generic_err(root, node, slot,
+			"unaligned pointer, have %llu should be aligned to %u",
+				bytenr, root->sectorsize);
+			ret = -EUCLEAN;
+			goto out;
+		}
+
+		if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
+			generic_err(root, node, slot,
+	"bad key order, current (%llu %u %llu) next (%llu %u %llu)",
+				key.objectid, key.type, key.offset,
+				next_key.objectid, next_key.type,
+				next_key.offset);
+			ret = -EUCLEAN;
+			goto out;
+		}
+	}
+out:
+	return ret;
+}
diff --git a/fs/btrfs/tree-checker.h b/fs/btrfs/tree-checker.h
new file mode 100644
index 000000000000..3d53e8d6fda0
--- /dev/null
+++ b/fs/btrfs/tree-checker.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) Qu Wenruo 2017.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program.
+ */
+
+#ifndef __BTRFS_TREE_CHECKER__
+#define __BTRFS_TREE_CHECKER__
+
+#include "ctree.h"
+#include "extent_io.h"
+
+/*
+ * Comprehensive leaf checker.
+ * Will check not only the item pointers, but also every possible member
+ * in item data.
+ */
+int btrfs_check_leaf_full(struct btrfs_root *root, struct extent_buffer *leaf);
+
+/*
+ * Less strict leaf checker.
+ * Will only check item pointers, not reading item data.
+ */
+int btrfs_check_leaf_relaxed(struct btrfs_root *root,
+			     struct extent_buffer *leaf);
+int btrfs_check_node(struct btrfs_root *root, struct extent_buffer *node);
+
+#endif
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 76017e1b3c0f..5aa2749eaf42 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4656,7 +4656,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 
 	if (type & BTRFS_BLOCK_GROUP_DATA) {
 		max_stripe_size = SZ_1G;
-		max_chunk_size = 10 * max_stripe_size;
+		max_chunk_size = BTRFS_MAX_DATA_CHUNK_SIZE;
 		if (!devs_max)
 			devs_max = BTRFS_MAX_DEVS(info->chunk_root);
 	} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
@@ -6370,6 +6370,8 @@ static int btrfs_check_chunk_valid(struct btrfs_root *root,
 	u16 num_stripes;
 	u16 sub_stripes;
 	u64 type;
+	u64 features;
+	bool mixed = false;
 
 	length = btrfs_chunk_length(leaf, chunk);
 	stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
@@ -6410,6 +6412,32 @@ static int btrfs_check_chunk_valid(struct btrfs_root *root,
 			  btrfs_chunk_type(leaf, chunk));
 		return -EIO;
 	}
+
+	if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
+		btrfs_err(root->fs_info, "missing chunk type flag: 0x%llx", type);
+		return -EIO;
+	}
+
+	if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+	    (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
+		btrfs_err(root->fs_info,
+			"system chunk with data or metadata type: 0x%llx", type);
+		return -EIO;
+	}
+
+	features = btrfs_super_incompat_flags(root->fs_info->super_copy);
+	if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+		mixed = true;
+
+	if (!mixed) {
+		if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
+		    (type & BTRFS_BLOCK_GROUP_DATA)) {
+			btrfs_err(root->fs_info,
+			"mixed chunk type in non-mixed mode: 0x%llx", type);
+			return -EIO;
+		}
+	}
+
 	if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
 	    (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
 	    (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 09ed29c67848..9c09aa29d6bd 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -24,6 +24,8 @@
 #include <linux/btrfs.h>
 #include "async-thread.h"
 
+#define BTRFS_MAX_DATA_CHUNK_SIZE	(10ULL * SZ_1G)
+
 extern struct mutex uuid_mutex;
 
 #define BTRFS_STRIPE_LEN	SZ_64K
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 3d2639c30018..6cbd0d805c9d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -3983,14 +3983,24 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
 	return auth;
 }
 
+static int add_authorizer_challenge(struct ceph_connection *con,
+				    void *challenge_buf, int challenge_buf_len)
+{
+	struct ceph_mds_session *s = con->private;
+	struct ceph_mds_client *mdsc = s->s_mdsc;
+	struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth;
+
+	return ceph_auth_add_authorizer_challenge(ac, s->s_auth.authorizer,
+					    challenge_buf, challenge_buf_len);
+}
 
-static int verify_authorizer_reply(struct ceph_connection *con, int len)
+static int verify_authorizer_reply(struct ceph_connection *con)
 {
 	struct ceph_mds_session *s = con->private;
 	struct ceph_mds_client *mdsc = s->s_mdsc;
 	struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth;
 
-	return ceph_auth_verify_authorizer_reply(ac, s->s_auth.authorizer, len);
+	return ceph_auth_verify_authorizer_reply(ac, s->s_auth.authorizer);
 }
 
 static int invalidate_authorizer(struct ceph_connection *con)
@@ -4046,6 +4056,7 @@ static const struct ceph_connection_operations mds_con_ops = {
 	.put = con_put,
 	.dispatch = dispatch,
 	.get_authorizer = get_authorizer,
+	.add_authorizer_challenge = add_authorizer_challenge,
 	.verify_authorizer_reply = verify_authorizer_reply,
 	.invalidate_authorizer = invalidate_authorizer,
 	.peer_reset = peer_reset,
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index aee2a066a446..0b061bbf1639 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -69,6 +69,7 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
 		.old_blkaddr = index,
 		.new_blkaddr = index,
 		.encrypted_page = NULL,
+		.is_meta = is_meta,
 	};
 
 	if (unlikely(!is_meta))
@@ -85,8 +86,10 @@ repeat:
 	fio.page = page;
 
 	if (f2fs_submit_page_bio(&fio)) {
-		f2fs_put_page(page, 1);
-		goto repeat;
+		memset(page_address(page), 0, PAGE_SIZE);
+		f2fs_stop_checkpoint(sbi, false);
+		f2fs_bug_on(sbi, 1);
+		return page;
 	}
 
 	lock_page(page);
@@ -117,7 +120,8 @@ struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
 	return __get_meta_page(sbi, index, false);
 }
 
-bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
+bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
+					block_t blkaddr, int type)
 {
 	switch (type) {
 	case META_NAT:
@@ -137,8 +141,20 @@ bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
 			return false;
 		break;
 	case META_POR:
+	case DATA_GENERIC:
 		if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
-			blkaddr < MAIN_BLKADDR(sbi)))
+			blkaddr < MAIN_BLKADDR(sbi))) {
+			if (type == DATA_GENERIC) {
+				f2fs_msg(sbi->sb, KERN_WARNING,
+					"access invalid blkaddr:%u", blkaddr);
+				WARN_ON(1);
+			}
+			return false;
+		}
+		break;
+	case META_GENERIC:
+		if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
+			blkaddr >= MAIN_BLKADDR(sbi)))
 			return false;
 		break;
 	default:
@@ -162,6 +178,7 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 		.op = REQ_OP_READ,
 		.op_flags = sync ? (READ_SYNC | REQ_META | REQ_PRIO) : REQ_RAHEAD,
 		.encrypted_page = NULL,
+		.is_meta = (type != META_POR),
 	};
 	struct blk_plug plug;
 
@@ -171,7 +188,7 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 	blk_start_plug(&plug);
 	for (; nrpages-- > 0; blkno++) {
 
-		if (!is_valid_blkaddr(sbi, blkno, type))
+		if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
 			goto out;
 
 		switch (type) {
@@ -706,6 +723,14 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
 					&cp_page_1, version);
 	if (err)
 		return NULL;
+
+	if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
+					sbi->blocks_per_seg) {
+		f2fs_msg(sbi->sb, KERN_WARNING,
+			"invalid cp_pack_total_block_count:%u",
+			le32_to_cpu(cp_block->cp_pack_total_block_count));
+		goto invalid_cp;
+	}
 	pre_version = *version;
 
 	cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
@@ -769,15 +794,15 @@ int get_valid_checkpoint(struct f2fs_sb_info *sbi)
 	cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
 	memcpy(sbi->ckpt, cp_block, blk_size);
 
-	/* Sanity checking of checkpoint */
-	if (sanity_check_ckpt(sbi))
-		goto fail_no_cp;
-
 	if (cur_page == cp1)
 		sbi->cur_cp_pack = 1;
 	else
 		sbi->cur_cp_pack = 2;
 
+	/* Sanity checking of checkpoint */
+	if (sanity_check_ckpt(sbi))
+		goto free_fail_no_cp;
+
 	if (cp_blks <= 1)
 		goto done;
 
@@ -799,6 +824,9 @@ done:
 	f2fs_put_page(cp2, 1);
 	return 0;
 
+free_fail_no_cp:
+	f2fs_put_page(cp1, 1);
+	f2fs_put_page(cp2, 1);
 fail_no_cp:
 	kfree(sbi->ckpt);
 	return -EINVAL;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ae354ac67da1..9041805096e0 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -240,6 +240,10 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 	struct page *page = fio->encrypted_page ?
 			fio->encrypted_page : fio->page;
 
+	if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
+			__is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
+		return -EFAULT;
+
 	trace_f2fs_submit_page_bio(page, fio);
 	f2fs_trace_ios(fio, 0);
 
@@ -266,9 +270,9 @@ void f2fs_submit_page_mbio(struct f2fs_io_info *fio)
 
 	io = is_read ? &sbi->read_io : &sbi->write_io[btype];
 
-	if (fio->old_blkaddr != NEW_ADDR)
-		verify_block_addr(sbi, fio->old_blkaddr);
-	verify_block_addr(sbi, fio->new_blkaddr);
+	if (__is_valid_data_blkaddr(fio->old_blkaddr))
+		verify_block_addr(fio, fio->old_blkaddr);
+	verify_block_addr(fio, fio->new_blkaddr);
 
 	down_write(&io->io_rwsem);
 
@@ -722,7 +726,13 @@ next_dnode:
 next_block:
 	blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
 
-	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) {
+	if (__is_valid_data_blkaddr(blkaddr) &&
+		!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
+		err = -EFAULT;
+		goto sync_out;
+	}
+
+	if (!is_valid_data_blkaddr(sbi, blkaddr)) {
 		if (create) {
 			if (unlikely(f2fs_cp_error(sbi))) {
 				err = -EIO;
@@ -985,6 +995,9 @@ static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr,
 	struct block_device *bdev = sbi->sb->s_bdev;
 	struct bio *bio;
 
+	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
+		return ERR_PTR(-EFAULT);
+
 	if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) {
 		ctx = fscrypt_get_ctx(inode, GFP_NOFS);
 		if (IS_ERR(ctx))
@@ -1084,6 +1097,10 @@ got_it:
 				SetPageUptodate(page);
 				goto confused;
 			}
+
+			if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
+								DATA_GENERIC))
+				goto set_error_page;
 		} else {
 			zero_user_segment(page, 0, PAGE_SIZE);
 			if (!PageUptodate(page))
@@ -1212,11 +1229,17 @@ retry_encrypt:
 
 	set_page_writeback(page);
 
+	if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
+		!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
+							DATA_GENERIC)) {
+		err = -EFAULT;
+		goto out_writepage;
+	}
 	/*
 	 * If current allocation needs SSR,
 	 * it had better in-place writes for updated data.
 	 */
-	if (unlikely(fio->old_blkaddr != NEW_ADDR &&
+	if (unlikely(is_valid_data_blkaddr(fio->sbi, fio->old_blkaddr) &&
 			!is_cold_data(page) &&
 			!IS_ATOMIC_WRITTEN_PAGE(page) &&
 			need_inplace_update(inode))) {
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 88e111ab068b..9c380885b0fc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -145,7 +145,7 @@ struct cp_control {
 };
 
 /*
- * For CP/NAT/SIT/SSA readahead
+ * indicate meta/data type
  */
 enum {
 	META_CP,
@@ -153,6 +153,8 @@ enum {
 	META_SIT,
 	META_SSA,
 	META_POR,
+	DATA_GENERIC,
+	META_GENERIC,
 };
 
 /* for the list of ino */
@@ -694,6 +696,7 @@ struct f2fs_io_info {
 	block_t old_blkaddr;	/* old block address before Cow */
 	struct page *page;	/* page to be written */
 	struct page *encrypted_page;	/* encrypted page */
+	bool is_meta;		/* indicate borrow meta inode mapping or not */
 };
 
 #define is_read_io(rw) (rw == READ)
@@ -1929,6 +1932,39 @@ static inline void *f2fs_kvzalloc(size_t size, gfp_t flags)
 	(pgofs - ADDRS_PER_INODE(inode) + ADDRS_PER_BLOCK) /	\
 	ADDRS_PER_BLOCK * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode))
 
+#define __is_meta_io(fio) (PAGE_TYPE_OF_BIO(fio->type) == META &&	\
+				(!is_read_io(fio->op) || fio->is_meta))
+
+bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
+					block_t blkaddr, int type);
+void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
+static inline void verify_blkaddr(struct f2fs_sb_info *sbi,
+					block_t blkaddr, int type)
+{
+	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, type)) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"invalid blkaddr: %u, type: %d, run fsck to fix.",
+			blkaddr, type);
+		f2fs_bug_on(sbi, 1);
+	}
+}
+
+static inline bool __is_valid_data_blkaddr(block_t blkaddr)
+{
+	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR)
+		return false;
+	return true;
+}
+
+static inline bool is_valid_data_blkaddr(struct f2fs_sb_info *sbi,
+						block_t blkaddr)
+{
+	if (!__is_valid_data_blkaddr(blkaddr))
+		return false;
+	verify_blkaddr(sbi, blkaddr, DATA_GENERIC);
+	return true;
+}
+
 /*
  * file.c
  */
@@ -2114,7 +2150,8 @@ void f2fs_stop_checkpoint(struct f2fs_sb_info *, bool);
 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
 struct page *get_tmp_page(struct f2fs_sb_info *, pgoff_t);
-bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
+bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
+					block_t blkaddr, int type);
 int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int, bool);
 void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 594e6e20d6dd..b768f495603e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -310,13 +310,13 @@ static pgoff_t __get_first_dirty_index(struct address_space *mapping,
 	return pgofs;
 }
 
-static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
-							int whence)
+static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
+				pgoff_t dirty, pgoff_t pgofs, int whence)
 {
 	switch (whence) {
 	case SEEK_DATA:
 		if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
-			(blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
+			is_valid_data_blkaddr(sbi, blkaddr))
 			return true;
 		break;
 	case SEEK_HOLE:
@@ -378,7 +378,15 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
 			block_t blkaddr;
 			blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
 
-			if (__found_offset(blkaddr, dirty, pgofs, whence)) {
+			if (__is_valid_data_blkaddr(blkaddr) &&
+				!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
+						blkaddr, DATA_GENERIC)) {
+				f2fs_put_dnode(&dn);
+				goto fail;
+			}
+
+			if (__found_offset(F2FS_I_SB(inode), blkaddr, dirty,
+							pgofs, whence)) {
 				f2fs_put_dnode(&dn);
 				goto found;
 			}
@@ -481,6 +489,11 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 
 		dn->data_blkaddr = NULL_ADDR;
 		set_data_blkaddr(dn);
+
+		if (__is_valid_data_blkaddr(blkaddr) &&
+			!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
+			continue;
+
 		invalidate_blocks(sbi, blkaddr);
 		if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
 			clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index d7369895a78a..1de02c31756b 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -59,13 +59,16 @@ static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
 	}
 }
 
-static bool __written_first_block(struct f2fs_inode *ri)
+static int __written_first_block(struct f2fs_sb_info *sbi,
+					struct f2fs_inode *ri)
 {
 	block_t addr = le32_to_cpu(ri->i_addr[0]);
 
-	if (addr != NEW_ADDR && addr != NULL_ADDR)
-		return true;
-	return false;
+	if (!__is_valid_data_blkaddr(addr))
+		return 1;
+	if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC))
+		return -EFAULT;
+	return 0;
 }
 
 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
@@ -103,12 +106,57 @@ static void __recover_inline_status(struct inode *inode, struct page *ipage)
 	return;
 }
 
+static bool sanity_check_inode(struct inode *inode, struct page *node_page)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	unsigned long long iblocks;
+
+	iblocks = le64_to_cpu(F2FS_INODE(node_page)->i_blocks);
+	if (!iblocks) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_msg(sbi->sb, KERN_WARNING,
+			"%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, "
+			"run fsck to fix.",
+			__func__, inode->i_ino, iblocks);
+		return false;
+	}
+
+	if (ino_of_node(node_page) != nid_of_node(node_page)) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_msg(sbi->sb, KERN_WARNING,
+			"%s: corrupted inode footer i_ino=%lx, ino,nid: "
+			"[%u, %u] run fsck to fix.",
+			__func__, inode->i_ino,
+			ino_of_node(node_page), nid_of_node(node_page));
+		return false;
+	}
+
+	if (F2FS_I(inode)->extent_tree) {
+		struct extent_info *ei = &F2FS_I(inode)->extent_tree->largest;
+
+		if (ei->len &&
+			(!f2fs_is_valid_blkaddr(sbi, ei->blk, DATA_GENERIC) ||
+			!f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
+							DATA_GENERIC))) {
+			set_sbi_flag(sbi, SBI_NEED_FSCK);
+			f2fs_msg(sbi->sb, KERN_WARNING,
+				"%s: inode (ino=%lx) extent info [%u, %u, %u] "
+				"is incorrect, run fsck to fix",
+				__func__, inode->i_ino,
+				ei->blk, ei->fofs, ei->len);
+			return false;
+		}
+	}
+	return true;
+}
+
 static int do_read_inode(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 	struct page *node_page;
 	struct f2fs_inode *ri;
+	int err;
 
 	/* Check if ino is within scope */
 	if (check_nid_range(sbi, inode->i_ino)) {
@@ -152,6 +200,11 @@ static int do_read_inode(struct inode *inode)
 
 	get_inline_info(inode, ri);
 
+	if (!sanity_check_inode(inode, node_page)) {
+		f2fs_put_page(node_page, 1);
+		return -EINVAL;
+	}
+
 	/* check data exist */
 	if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
 		__recover_inline_status(inode, node_page);
@@ -159,7 +212,12 @@ static int do_read_inode(struct inode *inode)
 	/* get rdev by using inline_info */
 	__get_inode_rdev(inode, ri);
 
-	if (__written_first_block(ri))
+	err = __written_first_block(sbi, ri);
+	if (err < 0) {
+		f2fs_put_page(node_page, 1);
+		return err;
+	}
+	if (!err)
 		set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
 
 	if (!need_inode_block_update(sbi, inode->i_ino))
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index addff6a3b176..f4fe54047fb7 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -304,8 +304,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
 			new_blkaddr == NULL_ADDR);
 	f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
 			new_blkaddr == NEW_ADDR);
-	f2fs_bug_on(sbi, nat_get_blkaddr(e) != NEW_ADDR &&
-			nat_get_blkaddr(e) != NULL_ADDR &&
+	f2fs_bug_on(sbi, is_valid_data_blkaddr(sbi, nat_get_blkaddr(e)) &&
 			new_blkaddr == NEW_ADDR);
 
 	/* increment version no as node is removed */
@@ -320,7 +319,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
 
 	/* change address */
 	nat_set_blkaddr(e, new_blkaddr);
-	if (new_blkaddr == NEW_ADDR || new_blkaddr == NULL_ADDR)
+	if (!is_valid_data_blkaddr(sbi, new_blkaddr))
 		set_nat_flag(e, IS_CHECKPOINTED, false);
 	__set_nat_cache_dirty(nm_i, e);
 
@@ -1606,6 +1605,12 @@ static int f2fs_write_node_page(struct page *page,
 		return 0;
 	}
 
+	if (__is_valid_data_blkaddr(ni.blk_addr) &&
+		!f2fs_is_valid_blkaddr(sbi, ni.blk_addr, DATA_GENERIC)) {
+		up_read(&sbi->node_write);
+		goto redirty_out;
+	}
+
 	set_page_writeback(page);
 	fio.old_blkaddr = ni.blk_addr;
 	write_node_page(nid, &fio);
@@ -1704,8 +1709,9 @@ static void __del_from_free_nid_list(struct f2fs_nm_info *nm_i,
 static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
-	struct free_nid *i;
+	struct free_nid *i, *e;
 	struct nat_entry *ne;
+	int err = -EINVAL;
 
 	if (!available_free_memory(sbi, FREE_NIDS))
 		return -1;
@@ -1714,35 +1720,58 @@ static int add_free_nid(struct f2fs_sb_info *sbi, nid_t nid, bool build)
 	if (unlikely(nid == 0))
 		return 0;
 
-	if (build) {
-		/* do not add allocated nids */
-		ne = __lookup_nat_cache(nm_i, nid);
-		if (ne && (!get_nat_flag(ne, IS_CHECKPOINTED) ||
-				nat_get_blkaddr(ne) != NULL_ADDR))
-			return 0;
-	}
-
 	i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
 	i->nid = nid;
 	i->state = NID_NEW;
 
-	if (radix_tree_preload(GFP_NOFS)) {
-		kmem_cache_free(free_nid_slab, i);
-		return 0;
-	}
+	if (radix_tree_preload(GFP_NOFS))
+		goto err;
 
 	spin_lock(&nm_i->free_nid_list_lock);
-	if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i)) {
-		spin_unlock(&nm_i->free_nid_list_lock);
-		radix_tree_preload_end();
-		kmem_cache_free(free_nid_slab, i);
-		return 0;
+
+	if (build) {
+		/*
+		 *   Thread A             Thread B
+		 *  - f2fs_create
+		 *   - f2fs_new_inode
+		 *    - alloc_nid
+		 *     - __insert_nid_to_list(ALLOC_NID_LIST)
+		 *                     - f2fs_balance_fs_bg
+		 *                      - build_free_nids
+		 *                       - __build_free_nids
+		 *                        - scan_nat_page
+		 *                         - add_free_nid
+		 *                          - __lookup_nat_cache
+		 *  - f2fs_add_link
+		 *   - init_inode_metadata
+		 *    - new_inode_page
+		 *     - new_node_page
+		 *      - set_node_addr
+		 *  - alloc_nid_done
+		 *   - __remove_nid_from_list(ALLOC_NID_LIST)
+		 *                         - __insert_nid_to_list(FREE_NID_LIST)
+		 */
+		ne = __lookup_nat_cache(nm_i, nid);
+		if (ne && (!get_nat_flag(ne, IS_CHECKPOINTED) ||
+				nat_get_blkaddr(ne) != NULL_ADDR))
+			goto err_out;
+
+		e = __lookup_free_nid_list(nm_i, nid);
+		if (e)
+			goto err_out;
 	}
+	if (radix_tree_insert(&nm_i->free_nid_root, i->nid, i))
+		goto err_out;
+	err = 0;
 	list_add_tail(&i->list, &nm_i->free_nid_list);
 	nm_i->fcnt++;
+err_out:
 	spin_unlock(&nm_i->free_nid_list_lock);
 	radix_tree_preload_end();
-	return 1;
+err:
+	if (err)
+		kmem_cache_free(free_nid_slab, i);
+	return !err;
 }
 
 static void remove_free_nid(struct f2fs_nm_info *nm_i, nid_t nid)
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 98c1a63a4614..ab4cbb4be423 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -236,7 +236,7 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
 	while (1) {
 		struct fsync_inode_entry *entry;
 
-		if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
+		if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
 			return 0;
 
 		page = get_tmp_page(sbi, blkaddr);
@@ -468,7 +468,7 @@ retry_dn:
 		}
 
 		/* dest is valid block, try to recover from src to dest */
-		if (is_valid_blkaddr(sbi, dest, META_POR)) {
+		if (f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
 
 			if (src == NULL_ADDR) {
 				err = reserve_new_block(&dn);
@@ -527,7 +527,7 @@ static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
 	while (1) {
 		struct fsync_inode_entry *entry;
 
-		if (!is_valid_blkaddr(sbi, blkaddr, META_POR))
+		if (!f2fs_is_valid_blkaddr(sbi, blkaddr, META_POR))
 			break;
 
 		ra_meta_pages_cond(sbi, blkaddr);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 35d48ef0573c..2fb99a081de8 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -493,6 +493,9 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi)
 	init_waitqueue_head(&fcc->flush_wait_queue);
 	init_llist_head(&fcc->issue_list);
 	SM_I(sbi)->cmd_control_info = fcc;
+	if (!test_opt(sbi, FLUSH_MERGE))
+		return err;
+
 	fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
 				"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
 	if (IS_ERR(fcc->f2fs_issue_flush)) {
@@ -941,7 +944,7 @@ bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
 	struct seg_entry *se;
 	bool is_cp = false;
 
-	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR)
+	if (!is_valid_data_blkaddr(sbi, blkaddr))
 		return true;
 
 	mutex_lock(&sit_i->sentry_lock);
@@ -1665,7 +1668,7 @@ void f2fs_wait_on_encrypted_page_writeback(struct f2fs_sb_info *sbi,
 {
 	struct page *cpage;
 
-	if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR)
+	if (!is_valid_data_blkaddr(sbi, blkaddr))
 		return;
 
 	cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
@@ -2319,7 +2322,7 @@ static int build_curseg(struct f2fs_sb_info *sbi)
 	return restore_curseg_summaries(sbi);
 }
 
-static void build_sit_entries(struct f2fs_sb_info *sbi)
+static int build_sit_entries(struct f2fs_sb_info *sbi)
 {
 	struct sit_info *sit_i = SIT_I(sbi);
 	struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA);
@@ -2330,6 +2333,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
 	unsigned int i, start, end;
 	unsigned int readed, start_blk = 0;
 	int nrpages = MAX_BIO_BLOCKS(sbi) * 8;
+	int err = 0;
 
 	do {
 		readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT, true);
@@ -2347,7 +2351,9 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
 			sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)];
 			f2fs_put_page(page, 1);
 
-			check_block_count(sbi, start, &sit);
+			err = check_block_count(sbi, start, &sit);
+			if (err)
+				return err;
 			seg_info_from_raw_sit(se, &sit);
 
 			/* build discard map only one time */
@@ -2370,12 +2376,23 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
 		unsigned int old_valid_blocks;
 
 		start = le32_to_cpu(segno_in_journal(journal, i));
+		if (start >= MAIN_SEGS(sbi)) {
+			f2fs_msg(sbi->sb, KERN_ERR,
+					"Wrong journal entry on segno %u",
+					start);
+			set_sbi_flag(sbi, SBI_NEED_FSCK);
+			err = -EINVAL;
+			break;
+		}
+
 		se = &sit_i->sentries[start];
 		sit = sit_in_journal(journal, i);
 
 		old_valid_blocks = se->valid_blocks;
 
-		check_block_count(sbi, start, &sit);
+		err = check_block_count(sbi, start, &sit);
+		if (err)
+			break;
 		seg_info_from_raw_sit(se, &sit);
 
 		if (f2fs_discard_en(sbi)) {
@@ -2390,6 +2407,7 @@ static void build_sit_entries(struct f2fs_sb_info *sbi)
 				se->valid_blocks - old_valid_blocks;
 	}
 	up_read(&curseg->journal_rwsem);
+	return err;
 }
 
 static void init_free_segmap(struct f2fs_sb_info *sbi)
@@ -2539,7 +2557,7 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
 
 	INIT_LIST_HEAD(&sm_info->sit_entry_set);
 
-	if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) {
+	if (!f2fs_readonly(sbi->sb)) {
 		err = create_flush_cmd_control(sbi);
 		if (err)
 			return err;
@@ -2556,7 +2574,9 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
 		return err;
 
 	/* reinit free segmap based on SIT */
-	build_sit_entries(sbi);
+	err = build_sit_entries(sbi);
+	if (err)
+		return err;
 
 	init_free_segmap(sbi);
 	err = build_dirty_segmap(sbi);
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 3d9b9e98c4c2..893723978f5e 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -18,6 +18,8 @@
 #define DEF_RECLAIM_PREFREE_SEGMENTS	5	/* 5% over total segments */
 #define DEF_MAX_RECLAIM_PREFREE_SEGMENTS	4096	/* 8GB in maximum */
 
+#define F2FS_MIN_SEGMENTS	9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */
+
 /* L: Logical segment # in volume, R: Relative segment # in main area */
 #define GET_L2R_SEGNO(free_i, segno)	(segno - free_i->start_segno)
 #define GET_R2L_SEGNO(free_i, segno)	(segno + free_i->start_segno)
@@ -47,13 +49,19 @@
 	 (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno /		\
 	  sbi->segs_per_sec))	\
 
-#define MAIN_BLKADDR(sbi)	(SM_I(sbi)->main_blkaddr)
-#define SEG0_BLKADDR(sbi)	(SM_I(sbi)->seg0_blkaddr)
+#define MAIN_BLKADDR(sbi)						\
+	(SM_I(sbi) ? SM_I(sbi)->main_blkaddr : 				\
+		le32_to_cpu(F2FS_RAW_SUPER(sbi)->main_blkaddr))
+#define SEG0_BLKADDR(sbi)						\
+	(SM_I(sbi) ? SM_I(sbi)->seg0_blkaddr : 				\
+		le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment0_blkaddr))
 
 #define MAIN_SEGS(sbi)	(SM_I(sbi)->main_segments)
 #define MAIN_SECS(sbi)	(sbi->total_sections)
 
-#define TOTAL_SEGS(sbi)	(SM_I(sbi)->segment_count)
+#define TOTAL_SEGS(sbi)							\
+	(SM_I(sbi) ? SM_I(sbi)->segment_count : 				\
+		le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count))
 #define TOTAL_BLKS(sbi)	(TOTAL_SEGS(sbi) << sbi->log_blocks_per_seg)
 
 #define MAX_BLKADDR(sbi)	(SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi))
@@ -73,7 +81,7 @@
 	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1))
 
 #define GET_SEGNO(sbi, blk_addr)					\
-	(((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ?		\
+	((!is_valid_data_blkaddr(sbi, blk_addr)) ?			\
 	NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),			\
 		GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
 #define GET_SECNO(sbi, segno)					\
@@ -589,16 +597,20 @@ static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
 	f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
 }
 
-static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
+static inline void verify_block_addr(struct f2fs_io_info *fio, block_t blk_addr)
 {
-	BUG_ON(blk_addr < SEG0_BLKADDR(sbi)
-			|| blk_addr >= MAX_BLKADDR(sbi));
+	struct f2fs_sb_info *sbi = fio->sbi;
+
+	if (__is_meta_io(fio))
+		verify_blkaddr(sbi, blk_addr, META_GENERIC);
+	else
+		verify_blkaddr(sbi, blk_addr, DATA_GENERIC);
 }
 
 /*
  * Summary block is always treated as an invalid block
  */
-static inline void check_block_count(struct f2fs_sb_info *sbi,
+static inline int check_block_count(struct f2fs_sb_info *sbi,
 		int segno, struct f2fs_sit_entry *raw_sit)
 {
 #ifdef CONFIG_F2FS_CHECK_FS
@@ -620,11 +632,25 @@ static inline void check_block_count(struct f2fs_sb_info *sbi,
 		cur_pos = next_pos;
 		is_valid = !is_valid;
 	} while (cur_pos < sbi->blocks_per_seg);
-	BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
+
+	if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+				"Mismatch valid blocks %d vs. %d",
+					GET_SIT_VBLOCKS(raw_sit), valid_blocks);
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		return -EINVAL;
+	}
 #endif
 	/* check segment usage, and check boundary of a given segment number */
-	f2fs_bug_on(sbi, GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
-					|| segno > TOTAL_SEGS(sbi) - 1);
+	if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
+					|| segno > TOTAL_SEGS(sbi) - 1)) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+				"Wrong valid blocks %d or segno %u",
+					GET_SIT_VBLOCKS(raw_sit), segno);
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		return -EINVAL;
+	}
+	return 0;
 }
 
 static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 91bf72334722..c8f408d8a582 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1337,6 +1337,8 @@ static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 				struct buffer_head *bh)
 {
+	block_t segment_count, segs_per_sec, secs_per_zone;
+	block_t total_sections, blocks_per_seg;
 	struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
 					(bh->b_data + F2FS_SUPER_OFFSET);
 	struct super_block *sb = sbi->sb;
@@ -1393,6 +1395,68 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 		return 1;
 	}
 
+	segment_count = le32_to_cpu(raw_super->segment_count);
+	segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
+	secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
+	total_sections = le32_to_cpu(raw_super->section_count);
+
+	/* blocks_per_seg should be 512, given the above check */
+	blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
+
+	if (segment_count > F2FS_MAX_SEGMENT ||
+				segment_count < F2FS_MIN_SEGMENTS) {
+		f2fs_msg(sb, KERN_INFO,
+			"Invalid segment count (%u)",
+			segment_count);
+		return 1;
+	}
+
+	if (total_sections > segment_count ||
+			total_sections < F2FS_MIN_SEGMENTS ||
+			segs_per_sec > segment_count || !segs_per_sec) {
+		f2fs_msg(sb, KERN_INFO,
+			"Invalid segment/section count (%u, %u x %u)",
+			segment_count, total_sections, segs_per_sec);
+		return 1;
+	}
+
+	if ((segment_count / segs_per_sec) < total_sections) {
+		f2fs_msg(sb, KERN_INFO,
+			"Small segment_count (%u < %u * %u)",
+			segment_count, segs_per_sec, total_sections);
+		return 1;
+	}
+
+	if (segment_count > (le32_to_cpu(raw_super->block_count) >> 9)) {
+		f2fs_msg(sb, KERN_INFO,
+			"Wrong segment_count / block_count (%u > %u)",
+			segment_count, le32_to_cpu(raw_super->block_count));
+		return 1;
+	}
+
+	if (secs_per_zone > total_sections || !secs_per_zone) {
+		f2fs_msg(sb, KERN_INFO,
+			"Wrong secs_per_zone / total_sections (%u, %u)",
+			secs_per_zone, total_sections);
+		return 1;
+	}
+	if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION) {
+		f2fs_msg(sb, KERN_INFO,
+			"Corrupted extension count (%u > %u)",
+			le32_to_cpu(raw_super->extension_count),
+			F2FS_MAX_EXTENSION);
+		return 1;
+	}
+
+	if (le32_to_cpu(raw_super->cp_payload) >
+				(blocks_per_seg - F2FS_CP_PACKS)) {
+		f2fs_msg(sb, KERN_INFO,
+			"Insane cp_payload (%u > %u)",
+			le32_to_cpu(raw_super->cp_payload),
+			blocks_per_seg - F2FS_CP_PACKS);
+		return 1;
+	}
+
 	/* check reserved ino info */
 	if (le32_to_cpu(raw_super->node_ino) != 1 ||
 		le32_to_cpu(raw_super->meta_ino) != 2 ||
@@ -1405,13 +1469,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 		return 1;
 	}
 
-	if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid segment count (%u)",
-			le32_to_cpu(raw_super->segment_count));
-		return 1;
-	}
-
 	/* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
 	if (sanity_check_area_boundary(sbi, bh))
 		return 1;
@@ -1424,10 +1481,14 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
 	unsigned int total, fsmeta;
 	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
+	unsigned int ovp_segments, reserved_segments;
 	unsigned int main_segs, blocks_per_seg;
 	unsigned int sit_segs, nat_segs;
 	unsigned int sit_bitmap_size, nat_bitmap_size;
 	unsigned int log_blocks_per_seg;
+	unsigned int segment_count_main;
+	unsigned int cp_pack_start_sum, cp_payload;
+	block_t user_block_count;
 	int i;
 
 	total = le32_to_cpu(raw_super->segment_count);
@@ -1442,6 +1503,26 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
 	if (unlikely(fsmeta >= total))
 		return 1;
 
+	ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
+	reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
+
+	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
+			ovp_segments == 0 || reserved_segments == 0)) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong layout: check mkfs.f2fs version");
+		return 1;
+	}
+
+	user_block_count = le64_to_cpu(ckpt->user_block_count);
+	segment_count_main = le32_to_cpu(raw_super->segment_count_main);
+	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
+	if (!user_block_count || user_block_count >=
+			segment_count_main << log_blocks_per_seg) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong user_block_count: %u", user_block_count);
+		return 1;
+	}
+
 	main_segs = le32_to_cpu(raw_super->segment_count_main);
 	blocks_per_seg = sbi->blocks_per_seg;
 
@@ -1458,7 +1539,6 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
 
 	sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
 	nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
-	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
 
 	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
 		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
@@ -1468,6 +1548,17 @@ int sanity_check_ckpt(struct f2fs_sb_info *sbi)
 		return 1;
 	}
 
+	cp_pack_start_sum = __start_sum_addr(sbi);
+	cp_payload = __cp_payload(sbi);
+	if (cp_pack_start_sum < cp_payload + 1 ||
+		cp_pack_start_sum > blocks_per_seg - 1 -
+			NR_CURSEG_TYPE) {
+		f2fs_msg(sbi->sb, KERN_ERR,
+			"Wrong cp_pack_start_sum: %u",
+			cp_pack_start_sum);
+		return 1;
+	}
+
 	if (unlikely(f2fs_cp_error(sbi))) {
 		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
 		return 1;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 2c2f182cde03..f53c139c312e 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -118,6 +118,16 @@ static void huge_pagevec_release(struct pagevec *pvec)
 	pagevec_reinit(pvec);
 }
 
+/*
+ * Mask used when checking the page offset value passed in via system
+ * calls.  This value will be converted to a loff_t which is signed.
+ * Therefore, we want to check the upper PAGE_SHIFT + 1 bits of the
+ * value.  The extra bit (- 1 in the shift value) is to take the sign
+ * bit into account.
+ */
+#define PGOFF_LOFFT_MAX \
+	(((1UL << (PAGE_SHIFT + 1)) - 1) <<  (BITS_PER_LONG - (PAGE_SHIFT + 1)))
+
 static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
 	struct inode *inode = file_inode(file);
@@ -136,17 +146,31 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	vma->vm_flags |= VM_HUGETLB | VM_DONTEXPAND;
 	vma->vm_ops = &hugetlb_vm_ops;
 
+	/*
+	 * page based offset in vm_pgoff could be sufficiently large to
+	 * overflow a loff_t when converted to byte offset.  This can
+	 * only happen on architectures where sizeof(loff_t) ==
+	 * sizeof(unsigned long).  So, only check in those instances.
+	 */
+	if (sizeof(unsigned long) == sizeof(loff_t)) {
+		if (vma->vm_pgoff & PGOFF_LOFFT_MAX)
+			return -EINVAL;
+	}
+
+	/* must be huge page aligned */
 	if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT))
 		return -EINVAL;
 
 	vma_len = (loff_t)(vma->vm_end - vma->vm_start);
+	len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+	/* check for overflow */
+	if (len < vma_len)
+		return -EINVAL;
 
 	inode_lock(inode);
 	file_accessed(file);
 
 	ret = -ENOMEM;
-	len = vma_len + ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
-
 	if (hugetlb_reserve_pages(inode,
 				vma->vm_pgoff >> huge_page_order(h),
 				len >> huge_page_shift(h), vma,
@@ -155,7 +179,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 
 	ret = 0;
 	if (vma->vm_flags & VM_WRITE && inode->i_size < len)
-		inode->i_size = len;
+		i_size_write(inode, len);
 out:
 	inode_unlock(inode);
 
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 9b43ca02b7ab..80317b04c84a 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -88,7 +88,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
 		int slen = strlen(kn->name);
 
 		len -= slen;
-		strncpy(s + len, kn->name, slen);
+		memcpy(s + len, kn->name, slen);
 		if (len)
 			s[--len] = '/';
 
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 12467ad608cd..03369a89600e 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -929,16 +929,20 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
 	}
 
 	ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
-	if (ret < 0)
-		goto out_bh;
-
-	strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
+	if (ret < 0) {
+		strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName");
+		pr_warn("incorrect volume identification, setting to "
+			"'InvalidName'\n");
+	} else {
+		strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
+	}
 	udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
 
 	ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
-	if (ret < 0)
+	if (ret < 0) {
+		ret = 0;
 		goto out_bh;
-
+	}
 	outstr[ret] = 0;
 	udf_debug("volSetIdent[] = '%s'\n", outstr);
 
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 3a3be23689b3..61a1738895b7 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -341,6 +341,11 @@ try_again:
 	return u_len;
 }
 
+/*
+ * Convert CS0 dstring to output charset. Warning: This function may truncate
+ * input string if it is too long as it is used for informational strings only
+ * and it is better to truncate the string than to refuse mounting a media.
+ */
 int udf_dstrCS0toUTF8(uint8_t *utf_o, int o_len,
 		      const uint8_t *ocu_i, int i_len)
 {
@@ -349,9 +354,12 @@ int udf_dstrCS0toUTF8(uint8_t *utf_o, int o_len,
 	if (i_len > 0) {
 		s_len = ocu_i[i_len - 1];
 		if (s_len >= i_len) {
-			pr_err("incorrect dstring lengths (%d/%d)\n",
-			       s_len, i_len);
-			return -EINVAL;
+			pr_warn("incorrect dstring lengths (%d/%d),"
+				" truncating\n", s_len, i_len);
+			s_len = i_len - 1;
+			/* 2-byte encoding? Need to round properly... */
+			if (ocu_i[0] == 16)
+				s_len -= (s_len - 1) & 2;
 		}
 	}
 
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 6622d46ddec3..9687208c676f 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -487,7 +487,14 @@ xfs_attr_shortform_addname(xfs_da_args_t *args)
 		if (args->flags & ATTR_CREATE)
 			return retval;
 		retval = xfs_attr_shortform_remove(args);
-		ASSERT(retval == 0);
+		if (retval)
+			return retval;
+		/*
+		 * Since we have removed the old attr, clear ATTR_REPLACE so
+		 * that the leaf format add routine won't trip over the attr
+		 * not being around.
+		 */
+		args->flags &= ~ATTR_REPLACE;
 	}
 
 	if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX ||
diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 070fc49e39e2..5031defe59c5 100644
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -71,6 +71,7 @@ struct bpf_insn_aux_data {
 		enum bpf_reg_type ptr_type;     /* pointer type for load/store insns */
 		struct bpf_map *map_ptr;        /* pointer for call insn into lookup_elem */
 	};
+	int sanitize_stack_off; /* stack slot to be cleared */
 	bool seen; /* this insn was processed by the verifier */
 };
 
diff --git a/include/linux/ceph/auth.h b/include/linux/ceph/auth.h
index 374bb1c4ef52..035f26a04364 100644
--- a/include/linux/ceph/auth.h
+++ b/include/linux/ceph/auth.h
@@ -63,8 +63,12 @@ struct ceph_auth_client_ops {
 	/* ensure that an existing authorizer is up to date */
 	int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
 				 struct ceph_auth_handshake *auth);
+	int (*add_authorizer_challenge)(struct ceph_auth_client *ac,
+					struct ceph_authorizer *a,
+					void *challenge_buf,
+					int challenge_buf_len);
 	int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
-				       struct ceph_authorizer *a, size_t len);
+				       struct ceph_authorizer *a);
 	void (*invalidate_authorizer)(struct ceph_auth_client *ac,
 				      int peer_type);
 
@@ -117,9 +121,12 @@ void ceph_auth_destroy_authorizer(struct ceph_authorizer *a);
 extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
 				       int peer_type,
 				       struct ceph_auth_handshake *a);
+int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
+				       struct ceph_authorizer *a,
+				       void *challenge_buf,
+				       int challenge_buf_len);
 extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
-					     struct ceph_authorizer *a,
-					     size_t len);
+					     struct ceph_authorizer *a);
 extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
 					    int peer_type);
 
diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h
index ae2f66833762..cf765db39c95 100644
--- a/include/linux/ceph/ceph_features.h
+++ b/include/linux/ceph/ceph_features.h
@@ -76,6 +76,7 @@
 // duplicated since it was introduced at the same time as CEPH_FEATURE_CRUSH_TUNABLES5
 #define CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING   (1ULL<<58) /* New, v7 encoding */
 #define CEPH_FEATURE_FS_FILE_LAYOUT_V2       (1ULL<<58) /* file_layout_t */
+#define CEPH_FEATURE_CEPHX_V2	(1ULL<<61) // *do not share this bit*
 
 /*
  * The introduction of CEPH_FEATURE_OSD_SNAPMAPPER caused the feature
@@ -124,7 +125,8 @@ static inline u64 ceph_sanitize_features(u64 features)
 	 CEPH_FEATURE_MSGR_KEEPALIVE2 |		\
 	 CEPH_FEATURE_CRUSH_V4 |		\
 	 CEPH_FEATURE_CRUSH_TUNABLES5 |		\
-	 CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING)
+	 CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING |	\
+	 CEPH_FEATURE_CEPHX_V2)
 
 #define CEPH_FEATURES_REQUIRED_DEFAULT   \
 	(CEPH_FEATURE_NOSRCADDR |	 \
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h
index 8dbd7879fdc6..5e1c9c80d536 100644
--- a/include/linux/ceph/messenger.h
+++ b/include/linux/ceph/messenger.h
@@ -30,7 +30,10 @@ struct ceph_connection_operations {
 	struct ceph_auth_handshake *(*get_authorizer) (
 				struct ceph_connection *con,
 			       int *proto, int force_new);
-	int (*verify_authorizer_reply) (struct ceph_connection *con, int len);
+	int (*add_authorizer_challenge)(struct ceph_connection *con,
+					void *challenge_buf,
+					int challenge_buf_len);
+	int (*verify_authorizer_reply) (struct ceph_connection *con);
 	int (*invalidate_authorizer)(struct ceph_connection *con);
 
 	/* there was some error on the socket (disconnect, whatever) */
@@ -200,9 +203,8 @@ struct ceph_connection {
 				 attempt for this connection, client */
 	u32 peer_global_seq;  /* peer's global seq for this connection */
 
+	struct ceph_auth_handshake *auth;
 	int auth_retry;       /* true if we need a newer authorizer */
-	void *auth_reply_buf;   /* where to put the authorizer reply */
-	int auth_reply_buf_len;
 
 	struct mutex mutex;
 
diff --git a/include/linux/ceph/msgr.h b/include/linux/ceph/msgr.h
index 0fe2656ac415..063f9d7f1b74 100644
--- a/include/linux/ceph/msgr.h
+++ b/include/linux/ceph/msgr.h
@@ -90,7 +90,7 @@ struct ceph_entity_inst {
 #define CEPH_MSGR_TAG_SEQ           13 /* 64-bit int follows with seen seq number */
 #define CEPH_MSGR_TAG_KEEPALIVE2    14 /* keepalive2 byte + ceph_timespec */
 #define CEPH_MSGR_TAG_KEEPALIVE2_ACK 15 /* keepalive2 reply */
-
+#define CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER 16  /* cephx v2 doing server challenge */
 
 /*
  * connection negotiation
diff --git a/include/linux/reset.h b/include/linux/reset.h
index 5daff15722d3..7e99690dbc81 100644
--- a/include/linux/reset.h
+++ b/include/linux/reset.h
@@ -13,76 +13,82 @@ int reset_control_deassert(struct reset_control *rstc);
 int reset_control_status(struct reset_control *rstc);
 
 struct reset_control *__of_reset_control_get(struct device_node *node,
-				     const char *id, int index, int shared);
+				     const char *id, int index, bool shared,
+				     bool optional);
+struct reset_control *__reset_control_get(struct device *dev, const char *id,
+					  int index, bool shared,
+					  bool optional);
 void reset_control_put(struct reset_control *rstc);
+int __device_reset(struct device *dev, bool optional);
 struct reset_control *__devm_reset_control_get(struct device *dev,
-				     const char *id, int index, int shared);
-
-int __must_check device_reset(struct device *dev);
-
-static inline int device_reset_optional(struct device *dev)
-{
-	return device_reset(dev);
-}
+				     const char *id, int index, bool shared,
+				     bool optional);
 
 #else
 
 static inline int reset_control_reset(struct reset_control *rstc)
 {
-	WARN_ON(1);
 	return 0;
 }
 
 static inline int reset_control_assert(struct reset_control *rstc)
 {
-	WARN_ON(1);
 	return 0;
 }
 
 static inline int reset_control_deassert(struct reset_control *rstc)
 {
-	WARN_ON(1);
 	return 0;
 }
 
 static inline int reset_control_status(struct reset_control *rstc)
 {
-	WARN_ON(1);
 	return 0;
 }
 
 static inline void reset_control_put(struct reset_control *rstc)
 {
-	WARN_ON(1);
 }
 
-static inline int __must_check device_reset(struct device *dev)
+static inline int __device_reset(struct device *dev, bool optional)
 {
-	WARN_ON(1);
-	return -ENOTSUPP;
+	return optional ? 0 : -ENOTSUPP;
 }
 
-static inline int device_reset_optional(struct device *dev)
+static inline struct reset_control *__of_reset_control_get(
+					struct device_node *node,
+					const char *id, int index, bool shared,
+					bool optional)
 {
-	return -ENOTSUPP;
+	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
-static inline struct reset_control *__of_reset_control_get(
-					struct device_node *node,
-					const char *id, int index, int shared)
+static inline struct reset_control *__reset_control_get(
+					struct device *dev, const char *id,
+					int index, bool shared, bool optional)
 {
-	return ERR_PTR(-ENOTSUPP);
+	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
 static inline struct reset_control *__devm_reset_control_get(
-					struct device *dev,
-					const char *id, int index, int shared)
+					struct device *dev, const char *id,
+					int index, bool shared, bool optional)
 {
-	return ERR_PTR(-ENOTSUPP);
+	return optional ? NULL : ERR_PTR(-ENOTSUPP);
 }
 
 #endif /* CONFIG_RESET_CONTROLLER */
 
+static inline int __must_check device_reset(struct device *dev)
+{
+	return __device_reset(dev, false);
+}
+
+static inline int device_reset_optional(struct device *dev)
+{
+	return __device_reset(dev, true);
+}
+
 /**
  * reset_control_get_exclusive - Lookup and obtain an exclusive reference
  *                               to a reset controller.
@@ -101,10 +107,7 @@ static inline struct reset_control *__devm_reset_control_get(
 static inline struct reset_control *
 __must_check reset_control_get_exclusive(struct device *dev, const char *id)
 {
-#ifndef CONFIG_RESET_CONTROLLER
-	WARN_ON(1);
-#endif
-	return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 0);
+	return __reset_control_get(dev, id, 0, false, false);
 }
 
 /**
@@ -132,19 +135,19 @@ __must_check reset_control_get_exclusive(struct device *dev, const char *id)
 static inline struct reset_control *reset_control_get_shared(
 					struct device *dev, const char *id)
 {
-	return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 1);
+	return __reset_control_get(dev, id, 0, true, false);
 }
 
 static inline struct reset_control *reset_control_get_optional_exclusive(
 					struct device *dev, const char *id)
 {
-	return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 0);
+	return __reset_control_get(dev, id, 0, false, true);
 }
 
 static inline struct reset_control *reset_control_get_optional_shared(
 					struct device *dev, const char *id)
 {
-	return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 1);
+	return __reset_control_get(dev, id, 0, true, true);
 }
 
 /**
@@ -160,7 +163,7 @@ static inline struct reset_control *reset_control_get_optional_shared(
 static inline struct reset_control *of_reset_control_get_exclusive(
 				struct device_node *node, const char *id)
 {
-	return __of_reset_control_get(node, id, 0, 0);
+	return __of_reset_control_get(node, id, 0, false, false);
 }
 
 /**
@@ -185,7 +188,7 @@ static inline struct reset_control *of_reset_control_get_exclusive(
 static inline struct reset_control *of_reset_control_get_shared(
 				struct device_node *node, const char *id)
 {
-	return __of_reset_control_get(node, id, 0, 1);
+	return __of_reset_control_get(node, id, 0, true, false);
 }
 
 /**
@@ -202,7 +205,7 @@ static inline struct reset_control *of_reset_control_get_shared(
 static inline struct reset_control *of_reset_control_get_exclusive_by_index(
 					struct device_node *node, int index)
 {
-	return __of_reset_control_get(node, NULL, index, 0);
+	return __of_reset_control_get(node, NULL, index, false, false);
 }
 
 /**
@@ -230,7 +233,7 @@ static inline struct reset_control *of_reset_control_get_exclusive_by_index(
 static inline struct reset_control *of_reset_control_get_shared_by_index(
 					struct device_node *node, int index)
 {
-	return __of_reset_control_get(node, NULL, index, 1);
+	return __of_reset_control_get(node, NULL, index, true, false);
 }
 
 /**
@@ -249,10 +252,7 @@ static inline struct reset_control *
 __must_check devm_reset_control_get_exclusive(struct device *dev,
 					      const char *id)
 {
-#ifndef CONFIG_RESET_CONTROLLER
-	WARN_ON(1);
-#endif
-	return __devm_reset_control_get(dev, id, 0, 0);
+	return __devm_reset_control_get(dev, id, 0, false, false);
 }
 
 /**
@@ -267,19 +267,19 @@ __must_check devm_reset_control_get_exclusive(struct device *dev,
 static inline struct reset_control *devm_reset_control_get_shared(
 					struct device *dev, const char *id)
 {
-	return __devm_reset_control_get(dev, id, 0, 1);
+	return __devm_reset_control_get(dev, id, 0, true, false);
 }
 
 static inline struct reset_control *devm_reset_control_get_optional_exclusive(
 					struct device *dev, const char *id)
 {
-	return __devm_reset_control_get(dev, id, 0, 0);
+	return __devm_reset_control_get(dev, id, 0, false, true);
 }
 
 static inline struct reset_control *devm_reset_control_get_optional_shared(
 					struct device *dev, const char *id)
 {
-	return __devm_reset_control_get(dev, id, 0, 1);
+	return __devm_reset_control_get(dev, id, 0, true, true);
 }
 
 /**
@@ -297,7 +297,7 @@ static inline struct reset_control *devm_reset_control_get_optional_shared(
 static inline struct reset_control *
 devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
 {
-	return __devm_reset_control_get(dev, NULL, index, 0);
+	return __devm_reset_control_get(dev, NULL, index, false, false);
 }
 
 /**
@@ -313,7 +313,7 @@ devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
 static inline struct reset_control *
 devm_reset_control_get_shared_by_index(struct device *dev, int index)
 {
-	return __devm_reset_control_get(dev, NULL, index, 1);
+	return __devm_reset_control_get(dev, NULL, index, true, false);
 }
 
 /*
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index c794c9af6c0f..a1ded2a1bf1d 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -730,6 +730,7 @@ struct btrfs_balance_item {
 #define BTRFS_FILE_EXTENT_INLINE 0
 #define BTRFS_FILE_EXTENT_REG 1
 #define BTRFS_FILE_EXTENT_PREALLOC 2
+#define BTRFS_FILE_EXTENT_TYPES	2
 
 struct btrfs_file_extent_item {
 	/*
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index dafa2708ce9e..1438b7396cb4 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -540,10 +540,11 @@ static bool is_spillable_regtype(enum bpf_reg_type type)
 /* check_stack_read/write functions track spill/fill of registers,
  * stack boundary and alignment are checked in check_mem_access()
  */
-static int check_stack_write(struct bpf_verifier_state *state, int off,
-			     int size, int value_regno)
+static int check_stack_write(struct bpf_verifier_env *env,
+			     struct bpf_verifier_state *state, int off,
+			     int size, int value_regno, int insn_idx)
 {
-	int i;
+	int i, spi = (MAX_BPF_STACK + off) / BPF_REG_SIZE;
 	/* caller checked that off % size == 0 and -MAX_BPF_STACK <= off < 0,
 	 * so it's aligned access and [off, off + size) are within stack limits
 	 */
@@ -558,15 +559,37 @@ static int check_stack_write(struct bpf_verifier_state *state, int off,
 		}
 
 		/* save register state */
-		state->spilled_regs[(MAX_BPF_STACK + off) / BPF_REG_SIZE] =
-			state->regs[value_regno];
-
-		for (i = 0; i < BPF_REG_SIZE; i++)
+		state->spilled_regs[spi] = state->regs[value_regno];
+
+		for (i = 0; i < BPF_REG_SIZE; i++) {
+			if (state->stack_slot_type[MAX_BPF_STACK + off + i] == STACK_MISC &&
+			    !env->allow_ptr_leaks) {
+				int *poff = &env->insn_aux_data[insn_idx].sanitize_stack_off;
+				int soff = (-spi - 1) * BPF_REG_SIZE;
+
+				/* detected reuse of integer stack slot with a pointer
+				 * which means either llvm is reusing stack slot or
+				 * an attacker is trying to exploit CVE-2018-3639
+				 * (speculative store bypass)
+				 * Have to sanitize that slot with preemptive
+				 * store of zero.
+				 */
+				if (*poff && *poff != soff) {
+					/* disallow programs where single insn stores
+					 * into two different stack slots, since verifier
+					 * cannot sanitize them
+					 */
+					verbose("insn %d cannot access two stack slots fp%d and fp%d",
+						insn_idx, *poff, soff);
+					return -EINVAL;
+				}
+				*poff = soff;
+			}
 			state->stack_slot_type[MAX_BPF_STACK + off + i] = STACK_SPILL;
+		}
 	} else {
 		/* regular write of data into stack */
-		state->spilled_regs[(MAX_BPF_STACK + off) / BPF_REG_SIZE] =
-			(struct bpf_reg_state) {};
+		state->spilled_regs[spi] = (struct bpf_reg_state) {};
 
 		for (i = 0; i < size; i++)
 			state->stack_slot_type[MAX_BPF_STACK + off + i] = STACK_MISC;
@@ -747,7 +770,7 @@ static int check_ptr_alignment(struct bpf_verifier_env *env,
  * if t==write && value_regno==-1, some unknown value is stored into memory
  * if t==read && value_regno==-1, don't care what we read from memory
  */
-static int check_mem_access(struct bpf_verifier_env *env, u32 regno, int off,
+static int check_mem_access(struct bpf_verifier_env *env, int insn_idx, u32 regno, int off,
 			    int bpf_size, enum bpf_access_type t,
 			    int value_regno)
 {
@@ -843,7 +866,8 @@ static int check_mem_access(struct bpf_verifier_env *env, u32 regno, int off,
 				verbose("attempt to corrupt spilled pointer on stack\n");
 				return -EACCES;
 			}
-			err = check_stack_write(state, off, size, value_regno);
+			err = check_stack_write(env, state, off, size,
+						value_regno, insn_idx);
 		} else {
 			err = check_stack_read(state, off, size, value_regno);
 		}
@@ -877,7 +901,7 @@ static int check_mem_access(struct bpf_verifier_env *env, u32 regno, int off,
 	return err;
 }
 
-static int check_xadd(struct bpf_verifier_env *env, struct bpf_insn *insn)
+static int check_xadd(struct bpf_verifier_env *env, int insn_idx, struct bpf_insn *insn)
 {
 	struct bpf_reg_state *regs = env->cur_state.regs;
 	int err;
@@ -910,13 +934,13 @@ static int check_xadd(struct bpf_verifier_env *env, struct bpf_insn *insn)
 	}
 
 	/* check whether atomic_add can read the memory */
-	err = check_mem_access(env, insn->dst_reg, insn->off,
+	err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
 			       BPF_SIZE(insn->code), BPF_READ, -1);
 	if (err)
 		return err;
 
 	/* check whether atomic_add can write into the same memory */
-	return check_mem_access(env, insn->dst_reg, insn->off,
+	return check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
 				BPF_SIZE(insn->code), BPF_WRITE, -1);
 }
 
@@ -1272,7 +1296,7 @@ static int check_call(struct bpf_verifier_env *env, int func_id, int insn_idx)
 	 * is inferred from register state.
 	 */
 	for (i = 0; i < meta.access_size; i++) {
-		err = check_mem_access(env, meta.regno, i, BPF_B, BPF_WRITE, -1);
+		err = check_mem_access(env, insn_idx, meta.regno, i, BPF_B, BPF_WRITE, -1);
 		if (err)
 			return err;
 	}
@@ -2938,7 +2962,7 @@ static int do_check(struct bpf_verifier_env *env)
 			/* check that memory (src_reg + off) is readable,
 			 * the state of dst_reg will be updated by this func
 			 */
-			err = check_mem_access(env, insn->src_reg, insn->off,
+			err = check_mem_access(env, insn_idx, insn->src_reg, insn->off,
 					       BPF_SIZE(insn->code), BPF_READ,
 					       insn->dst_reg);
 			if (err)
@@ -2978,7 +3002,7 @@ static int do_check(struct bpf_verifier_env *env)
 			enum bpf_reg_type *prev_dst_type, dst_reg_type;
 
 			if (BPF_MODE(insn->code) == BPF_XADD) {
-				err = check_xadd(env, insn);
+				err = check_xadd(env, insn_idx, insn);
 				if (err)
 					return err;
 				insn_idx++;
@@ -2997,7 +3021,7 @@ static int do_check(struct bpf_verifier_env *env)
 			dst_reg_type = regs[insn->dst_reg].type;
 
 			/* check that memory (dst_reg + off) is writeable */
-			err = check_mem_access(env, insn->dst_reg, insn->off,
+			err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
 					       BPF_SIZE(insn->code), BPF_WRITE,
 					       insn->src_reg);
 			if (err)
@@ -3032,7 +3056,7 @@ static int do_check(struct bpf_verifier_env *env)
 			}
 
 			/* check that memory (dst_reg + off) is writeable */
-			err = check_mem_access(env, insn->dst_reg, insn->off,
+			err = check_mem_access(env, insn_idx, insn->dst_reg, insn->off,
 					       BPF_SIZE(insn->code), BPF_WRITE,
 					       -1);
 			if (err)
@@ -3369,6 +3393,34 @@ static int convert_ctx_accesses(struct bpf_verifier_env *env)
 		else
 			continue;
 
+		if (type == BPF_WRITE &&
+		    env->insn_aux_data[i + delta].sanitize_stack_off) {
+			struct bpf_insn patch[] = {
+				/* Sanitize suspicious stack slot with zero.
+				 * There are no memory dependencies for this store,
+				 * since it's only using frame pointer and immediate
+				 * constant of zero
+				 */
+				BPF_ST_MEM(BPF_DW, BPF_REG_FP,
+					   env->insn_aux_data[i + delta].sanitize_stack_off,
+					   0),
+				/* the original STX instruction will immediately
+				 * overwrite the same stack slot with appropriate value
+				 */
+				*insn,
+			};
+
+			cnt = ARRAY_SIZE(patch);
+			new_prog = bpf_patch_insn_data(env, i + delta, patch, cnt);
+			if (!new_prog)
+				return -ENOMEM;
+
+			delta    += cnt - 1;
+			env->prog = new_prog;
+			insn      = new_prog->insnsi + i + delta;
+			continue;
+		}
+
 		if (env->insn_aux_data[i + delta].ptr_type != PTR_TO_CTX)
 			continue;
 
diff --git a/kernel/debug/kdb/kdb_support.c b/kernel/debug/kdb/kdb_support.c
index 2aed4a33521b..61cd704a21c8 100644
--- a/kernel/debug/kdb/kdb_support.c
+++ b/kernel/debug/kdb/kdb_support.c
@@ -129,13 +129,13 @@ int kdbnearsym(unsigned long addr, kdb_symtab_t *symtab)
 		}
 		if (i >= ARRAY_SIZE(kdb_name_table)) {
 			debug_kfree(kdb_name_table[0]);
-			memcpy(kdb_name_table, kdb_name_table+1,
+			memmove(kdb_name_table, kdb_name_table+1,
 			       sizeof(kdb_name_table[0]) *
 			       (ARRAY_SIZE(kdb_name_table)-1));
 		} else {
 			debug_kfree(knt1);
 			knt1 = kdb_name_table[i];
-			memcpy(kdb_name_table+i, kdb_name_table+i+1,
+			memmove(kdb_name_table+i, kdb_name_table+i+1,
 			       sizeof(kdb_name_table[0]) *
 			       (ARRAY_SIZE(kdb_name_table)-i-1));
 		}
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index a1de021dccba..fbfab5722254 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -608,7 +608,7 @@ static int prepare_uprobe(struct uprobe *uprobe, struct file *file,
 	BUG_ON((uprobe->offset & ~PAGE_MASK) +
 			UPROBE_SWBP_INSN_SIZE > PAGE_SIZE);
 
-	smp_wmb(); /* pairs with rmb() in find_active_uprobe() */
+	smp_wmb(); /* pairs with the smp_rmb() in handle_swbp() */
 	set_bit(UPROBE_COPY_INSN, &uprobe->flags);
 
  out:
@@ -1902,10 +1902,18 @@ static void handle_swbp(struct pt_regs *regs)
 	 * After we hit the bp, _unregister + _register can install the
 	 * new and not-yet-analyzed uprobe at the same address, restart.
 	 */
-	smp_rmb(); /* pairs with wmb() in install_breakpoint() */
 	if (unlikely(!test_bit(UPROBE_COPY_INSN, &uprobe->flags)))
 		goto out;
 
+	/*
+	 * Pairs with the smp_wmb() in prepare_uprobe().
+	 *
+	 * Guarantees that if we see the UPROBE_COPY_INSN bit set, then
+	 * we must also see the stores to &uprobe->arch performed by the
+	 * prepare_uprobe() call.
+	 */
+	smp_rmb();
+
 	/* Tracing handlers use ->utask to communicate with fetch methods */
 	if (!get_utask())
 		goto out;
diff --git a/lib/kobject.c b/lib/kobject.c
index b733a83e5294..f58c7f2b229c 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -127,7 +127,7 @@ static void fill_kobj_path(struct kobject *kobj, char *path, int length)
 		int cur = strlen(kobject_name(parent));
 		/* back up enough to print this name with '/' */
 		length -= cur;
-		strncpy(path + length, kobject_name(parent), cur);
+		memcpy(path + length, kobject_name(parent), cur);
 		*(path + --length) = '/';
 	}
 
diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c
index 3f415d8101f3..1c3c513add77 100644
--- a/lib/test_hexdump.c
+++ b/lib/test_hexdump.c
@@ -81,7 +81,7 @@ static void __init test_hexdump_prepare_test(size_t len, int rowsize,
 		const char *q = *result++;
 		size_t amount = strlen(q);
 
-		strncpy(p, q, amount);
+		memcpy(p, q, amount);
 		p += amount;
 
 		*p++ = ' ';
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 5e3a4db36310..3e50fcfe6ad8 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4170,6 +4170,12 @@ int hugetlb_reserve_pages(struct inode *inode,
 	struct resv_map *resv_map;
 	long gbl_reserve;
 
+	/* This should never happen */
+	if (from > to) {
+		VM_WARN(1, "%s called with a negative range\n", __func__);
+		return -EINVAL;
+	}
+
 	/*
 	 * Only apply hugepage reservation if asked. At fault time, an
 	 * attempt will be made for VM_NORESERVE to allocate a page
@@ -4259,7 +4265,9 @@ int hugetlb_reserve_pages(struct inode *inode,
 	return 0;
 out_err:
 	if (!vma || vma->vm_flags & VM_MAYSHARE)
-		region_abort(resv_map, from, to);
+		/* Don't call region_abort if region_chg failed */
+		if (chg >= 0)
+			region_abort(resv_map, from, to);
 	if (vma && is_vma_resv_set(vma, HPAGE_RESV_OWNER))
 		kref_put(&resv_map->refs, resv_map_release);
 	return ret;
diff --git a/mm/truncate.c b/mm/truncate.c
index 9c809e7d73c3..befdc6f575d2 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -443,9 +443,13 @@ void truncate_inode_pages_final(struct address_space *mapping)
 		 */
 		spin_lock_irq(&mapping->tree_lock);
 		spin_unlock_irq(&mapping->tree_lock);
-
-		truncate_inode_pages(mapping, 0);
 	}
+
+	/*
+	 * Cleancache needs notification even if there are no pages or shadow
+	 * entries.
+	 */
+	truncate_inode_pages(mapping, 0);
 }
 EXPORT_SYMBOL(truncate_inode_pages_final);
 
diff --git a/net/ceph/auth.c b/net/ceph/auth.c
index c822b3ae1bd3..8e79dca81748 100644
--- a/net/ceph/auth.c
+++ b/net/ceph/auth.c
@@ -314,14 +314,30 @@ int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
 }
 EXPORT_SYMBOL(ceph_auth_update_authorizer);
 
+int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
+				       struct ceph_authorizer *a,
+				       void *challenge_buf,
+				       int challenge_buf_len)
+{
+	int ret = 0;
+
+	mutex_lock(&ac->mutex);
+	if (ac->ops && ac->ops->add_authorizer_challenge)
+		ret = ac->ops->add_authorizer_challenge(ac, a, challenge_buf,
+							challenge_buf_len);
+	mutex_unlock(&ac->mutex);
+	return ret;
+}
+EXPORT_SYMBOL(ceph_auth_add_authorizer_challenge);
+
 int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
-				      struct ceph_authorizer *a, size_t len)
+				      struct ceph_authorizer *a)
 {
 	int ret = 0;
 
 	mutex_lock(&ac->mutex);
 	if (ac->ops && ac->ops->verify_authorizer_reply)
-		ret = ac->ops->verify_authorizer_reply(ac, a, len);
+		ret = ac->ops->verify_authorizer_reply(ac, a);
 	mutex_unlock(&ac->mutex);
 	return ret;
 }
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index b216131915e7..29e23b5cb2ed 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -8,6 +8,7 @@
 
 #include <linux/ceph/decode.h>
 #include <linux/ceph/auth.h>
+#include <linux/ceph/ceph_features.h>
 #include <linux/ceph/libceph.h>
 #include <linux/ceph/messenger.h>
 
@@ -69,25 +70,40 @@ static int ceph_x_encrypt(struct ceph_crypto_key *secret, void *buf,
 	return sizeof(u32) + ciphertext_len;
 }
 
+static int __ceph_x_decrypt(struct ceph_crypto_key *secret, void *p,
+			    int ciphertext_len)
+{
+	struct ceph_x_encrypt_header *hdr = p;
+	int plaintext_len;
+	int ret;
+
+	ret = ceph_crypt(secret, false, p, ciphertext_len, ciphertext_len,
+			 &plaintext_len);
+	if (ret)
+		return ret;
+
+	if (le64_to_cpu(hdr->magic) != CEPHX_ENC_MAGIC) {
+		pr_err("%s bad magic\n", __func__);
+		return -EINVAL;
+	}
+
+	return plaintext_len - sizeof(*hdr);
+}
+
 static int ceph_x_decrypt(struct ceph_crypto_key *secret, void **p, void *end)
 {
-	struct ceph_x_encrypt_header *hdr = *p + sizeof(u32);
-	int ciphertext_len, plaintext_len;
+	int ciphertext_len;
 	int ret;
 
 	ceph_decode_32_safe(p, end, ciphertext_len, e_inval);
 	ceph_decode_need(p, end, ciphertext_len, e_inval);
 
-	ret = ceph_crypt(secret, false, *p, end - *p, ciphertext_len,
-			 &plaintext_len);
-	if (ret)
+	ret = __ceph_x_decrypt(secret, *p, ciphertext_len);
+	if (ret < 0)
 		return ret;
 
-	if (hdr->struct_v != 1 || le64_to_cpu(hdr->magic) != CEPHX_ENC_MAGIC)
-		return -EPERM;
-
 	*p += ciphertext_len;
-	return plaintext_len - sizeof(struct ceph_x_encrypt_header);
+	return ret;
 
 e_inval:
 	return -EINVAL;
@@ -271,6 +287,51 @@ bad:
 	return -EINVAL;
 }
 
+/*
+ * Encode and encrypt the second part (ceph_x_authorize_b) of the
+ * authorizer.  The first part (ceph_x_authorize_a) should already be
+ * encoded.
+ */
+static int encrypt_authorizer(struct ceph_x_authorizer *au,
+			      u64 *server_challenge)
+{
+	struct ceph_x_authorize_a *msg_a;
+	struct ceph_x_authorize_b *msg_b;
+	void *p, *end;
+	int ret;
+
+	msg_a = au->buf->vec.iov_base;
+	WARN_ON(msg_a->ticket_blob.secret_id != cpu_to_le64(au->secret_id));
+	p = (void *)(msg_a + 1) + le32_to_cpu(msg_a->ticket_blob.blob_len);
+	end = au->buf->vec.iov_base + au->buf->vec.iov_len;
+
+	msg_b = p + ceph_x_encrypt_offset();
+	msg_b->struct_v = 2;
+	msg_b->nonce = cpu_to_le64(au->nonce);
+	if (server_challenge) {
+		msg_b->have_challenge = 1;
+		msg_b->server_challenge_plus_one =
+		    cpu_to_le64(*server_challenge + 1);
+	} else {
+		msg_b->have_challenge = 0;
+		msg_b->server_challenge_plus_one = 0;
+	}
+
+	ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b));
+	if (ret < 0)
+		return ret;
+
+	p += ret;
+	if (server_challenge) {
+		WARN_ON(p != end);
+	} else {
+		WARN_ON(p > end);
+		au->buf->vec.iov_len = p - au->buf->vec.iov_base;
+	}
+
+	return 0;
+}
+
 static void ceph_x_authorizer_cleanup(struct ceph_x_authorizer *au)
 {
 	ceph_crypto_key_destroy(&au->session_key);
@@ -287,7 +348,6 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
 	int maxlen;
 	struct ceph_x_authorize_a *msg_a;
 	struct ceph_x_authorize_b *msg_b;
-	void *p, *end;
 	int ret;
 	int ticket_blob_len =
 		(th->ticket_blob ? th->ticket_blob->vec.iov_len : 0);
@@ -331,21 +391,13 @@ static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
 	dout(" th %p secret_id %lld %lld\n", th, th->secret_id,
 	     le64_to_cpu(msg_a->ticket_blob.secret_id));
 
-	p = msg_a + 1;
-	p += ticket_blob_len;
-	end = au->buf->vec.iov_base + au->buf->vec.iov_len;
-
-	msg_b = p + ceph_x_encrypt_offset();
-	msg_b->struct_v = 1;
 	get_random_bytes(&au->nonce, sizeof(au->nonce));
-	msg_b->nonce = cpu_to_le64(au->nonce);
-	ret = ceph_x_encrypt(&au->session_key, p, end - p, sizeof(*msg_b));
-	if (ret < 0)
+	ret = encrypt_authorizer(au, NULL);
+	if (ret) {
+		pr_err("failed to encrypt authorizer: %d", ret);
 		goto out_au;
+	}
 
-	p += ret;
-	WARN_ON(p > end);
-	au->buf->vec.iov_len = p - au->buf->vec.iov_base;
 	dout(" built authorizer nonce %llx len %d\n", au->nonce,
 	     (int)au->buf->vec.iov_len);
 	return 0;
@@ -622,8 +674,56 @@ static int ceph_x_update_authorizer(
 	return 0;
 }
 
+static int decrypt_authorize_challenge(struct ceph_x_authorizer *au,
+				       void *challenge_buf,
+				       int challenge_buf_len,
+				       u64 *server_challenge)
+{
+	struct ceph_x_authorize_challenge *ch =
+	    challenge_buf + sizeof(struct ceph_x_encrypt_header);
+	int ret;
+
+	/* no leading len */
+	ret = __ceph_x_decrypt(&au->session_key, challenge_buf,
+			       challenge_buf_len);
+	if (ret < 0)
+		return ret;
+	if (ret < sizeof(*ch)) {
+		pr_err("bad size %d for ceph_x_authorize_challenge\n", ret);
+		return -EINVAL;
+	}
+
+	*server_challenge = le64_to_cpu(ch->server_challenge);
+	return 0;
+}
+
+static int ceph_x_add_authorizer_challenge(struct ceph_auth_client *ac,
+					   struct ceph_authorizer *a,
+					   void *challenge_buf,
+					   int challenge_buf_len)
+{
+	struct ceph_x_authorizer *au = (void *)a;
+	u64 server_challenge;
+	int ret;
+
+	ret = decrypt_authorize_challenge(au, challenge_buf, challenge_buf_len,
+					  &server_challenge);
+	if (ret) {
+		pr_err("failed to decrypt authorize challenge: %d", ret);
+		return ret;
+	}
+
+	ret = encrypt_authorizer(au, &server_challenge);
+	if (ret) {
+		pr_err("failed to encrypt authorizer w/ challenge: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
-					  struct ceph_authorizer *a, size_t len)
+					  struct ceph_authorizer *a)
 {
 	struct ceph_x_authorizer *au = (void *)a;
 	void *p = au->enc_buf;
@@ -633,8 +733,10 @@ static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
 	ret = ceph_x_decrypt(&au->session_key, &p, p + CEPHX_AU_ENC_BUF_LEN);
 	if (ret < 0)
 		return ret;
-	if (ret != sizeof(*reply))
-		return -EPERM;
+	if (ret < sizeof(*reply)) {
+		pr_err("bad size %d for ceph_x_authorize_reply\n", ret);
+		return -EINVAL;
+	}
 
 	if (au->nonce + 1 != le64_to_cpu(reply->nonce_plus_one))
 		ret = -EPERM;
@@ -700,26 +802,64 @@ static int calc_signature(struct ceph_x_authorizer *au, struct ceph_msg *msg,
 			  __le64 *psig)
 {
 	void *enc_buf = au->enc_buf;
-	struct {
-		__le32 len;
-		__le32 header_crc;
-		__le32 front_crc;
-		__le32 middle_crc;
-		__le32 data_crc;
-	} __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
 	int ret;
 
-	sigblock->len = cpu_to_le32(4*sizeof(u32));
-	sigblock->header_crc = msg->hdr.crc;
-	sigblock->front_crc = msg->footer.front_crc;
-	sigblock->middle_crc = msg->footer.middle_crc;
-	sigblock->data_crc =  msg->footer.data_crc;
-	ret = ceph_x_encrypt(&au->session_key, enc_buf, CEPHX_AU_ENC_BUF_LEN,
-			     sizeof(*sigblock));
-	if (ret < 0)
-		return ret;
+	if (msg->con->peer_features & CEPH_FEATURE_CEPHX_V2) {
+		struct {
+			__le32 len;
+			__le32 header_crc;
+			__le32 front_crc;
+			__le32 middle_crc;
+			__le32 data_crc;
+		} __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
+
+		sigblock->len = cpu_to_le32(4*sizeof(u32));
+		sigblock->header_crc = msg->hdr.crc;
+		sigblock->front_crc = msg->footer.front_crc;
+		sigblock->middle_crc = msg->footer.middle_crc;
+		sigblock->data_crc =  msg->footer.data_crc;
+
+		ret = ceph_x_encrypt(&au->session_key, enc_buf,
+				     CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock));
+		if (ret < 0)
+			return ret;
+
+		*psig = *(__le64 *)(enc_buf + sizeof(u32));
+	} else {
+		struct {
+			__le32 header_crc;
+			__le32 front_crc;
+			__le32 front_len;
+			__le32 middle_crc;
+			__le32 middle_len;
+			__le32 data_crc;
+			__le32 data_len;
+			__le32 seq_lower_word;
+		} __packed *sigblock = enc_buf;
+		struct {
+			__le64 a, b, c, d;
+		} __packed *penc = enc_buf;
+		int ciphertext_len;
+
+		sigblock->header_crc = msg->hdr.crc;
+		sigblock->front_crc = msg->footer.front_crc;
+		sigblock->front_len = msg->hdr.front_len;
+		sigblock->middle_crc = msg->footer.middle_crc;
+		sigblock->middle_len = msg->hdr.middle_len;
+		sigblock->data_crc =  msg->footer.data_crc;
+		sigblock->data_len = msg->hdr.data_len;
+		sigblock->seq_lower_word = *(__le32 *)&msg->hdr.seq;
+
+		/* no leading len, no ceph_x_encrypt_header */
+		ret = ceph_crypt(&au->session_key, true, enc_buf,
+				 CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock),
+				 &ciphertext_len);
+		if (ret)
+			return ret;
+
+		*psig = penc->a ^ penc->b ^ penc->c ^ penc->d;
+	}
 
-	*psig = *(__le64 *)(enc_buf + sizeof(u32));
 	return 0;
 }
 
@@ -774,6 +914,7 @@ static const struct ceph_auth_client_ops ceph_x_ops = {
 	.handle_reply = ceph_x_handle_reply,
 	.create_authorizer = ceph_x_create_authorizer,
 	.update_authorizer = ceph_x_update_authorizer,
+	.add_authorizer_challenge = ceph_x_add_authorizer_challenge,
 	.verify_authorizer_reply = ceph_x_verify_authorizer_reply,
 	.invalidate_authorizer = ceph_x_invalidate_authorizer,
 	.reset =  ceph_x_reset,
diff --git a/net/ceph/auth_x_protocol.h b/net/ceph/auth_x_protocol.h
index 671d30576c4f..a7cd203aacc2 100644
--- a/net/ceph/auth_x_protocol.h
+++ b/net/ceph/auth_x_protocol.h
@@ -69,6 +69,13 @@ struct ceph_x_authorize_a {
 struct ceph_x_authorize_b {
 	__u8 struct_v;
 	__le64 nonce;
+	__u8 have_challenge;
+	__le64 server_challenge_plus_one;
+} __attribute__ ((packed));
+
+struct ceph_x_authorize_challenge {
+	__u8 struct_v;
+	__le64 server_challenge;
 } __attribute__ ((packed));
 
 struct ceph_x_authorize_reply {
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 68acf94fae72..5a8075d9f2e7 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1394,30 +1394,26 @@ static void prepare_write_keepalive(struct ceph_connection *con)
  * Connection negotiation.
  */
 
-static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con,
-						int *auth_proto)
+static int get_connect_authorizer(struct ceph_connection *con)
 {
 	struct ceph_auth_handshake *auth;
+	int auth_proto;
 
 	if (!con->ops->get_authorizer) {
+		con->auth = NULL;
 		con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN;
 		con->out_connect.authorizer_len = 0;
-		return NULL;
+		return 0;
 	}
 
-	/* Can't hold the mutex while getting authorizer */
-	mutex_unlock(&con->mutex);
-	auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry);
-	mutex_lock(&con->mutex);
-
+	auth = con->ops->get_authorizer(con, &auth_proto, con->auth_retry);
 	if (IS_ERR(auth))
-		return auth;
-	if (con->state != CON_STATE_NEGOTIATING)
-		return ERR_PTR(-EAGAIN);
+		return PTR_ERR(auth);
 
-	con->auth_reply_buf = auth->authorizer_reply_buf;
-	con->auth_reply_buf_len = auth->authorizer_reply_buf_len;
-	return auth;
+	con->auth = auth;
+	con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto);
+	con->out_connect.authorizer_len = cpu_to_le32(auth->authorizer_buf_len);
+	return 0;
 }
 
 /*
@@ -1433,12 +1429,22 @@ static void prepare_write_banner(struct ceph_connection *con)
 	con_flag_set(con, CON_FLAG_WRITE_PENDING);
 }
 
+static void __prepare_write_connect(struct ceph_connection *con)
+{
+	con_out_kvec_add(con, sizeof(con->out_connect), &con->out_connect);
+	if (con->auth)
+		con_out_kvec_add(con, con->auth->authorizer_buf_len,
+				 con->auth->authorizer_buf);
+
+	con->out_more = 0;
+	con_flag_set(con, CON_FLAG_WRITE_PENDING);
+}
+
 static int prepare_write_connect(struct ceph_connection *con)
 {
 	unsigned int global_seq = get_global_seq(con->msgr, 0);
 	int proto;
-	int auth_proto;
-	struct ceph_auth_handshake *auth;
+	int ret;
 
 	switch (con->peer_name.type) {
 	case CEPH_ENTITY_TYPE_MON:
@@ -1465,24 +1471,11 @@ static int prepare_write_connect(struct ceph_connection *con)
 	con->out_connect.protocol_version = cpu_to_le32(proto);
 	con->out_connect.flags = 0;
 
-	auth_proto = CEPH_AUTH_UNKNOWN;
-	auth = get_connect_authorizer(con, &auth_proto);
-	if (IS_ERR(auth))
-		return PTR_ERR(auth);
-
-	con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto);
-	con->out_connect.authorizer_len = auth ?
-		cpu_to_le32(auth->authorizer_buf_len) : 0;
-
-	con_out_kvec_add(con, sizeof (con->out_connect),
-					&con->out_connect);
-	if (auth && auth->authorizer_buf_len)
-		con_out_kvec_add(con, auth->authorizer_buf_len,
-					auth->authorizer_buf);
-
-	con->out_more = 0;
-	con_flag_set(con, CON_FLAG_WRITE_PENDING);
+	ret = get_connect_authorizer(con);
+	if (ret)
+		return ret;
 
+	__prepare_write_connect(con);
 	return 0;
 }
 
@@ -1743,11 +1736,21 @@ static int read_partial_connect(struct ceph_connection *con)
 	if (ret <= 0)
 		goto out;
 
-	size = le32_to_cpu(con->in_reply.authorizer_len);
-	end += size;
-	ret = read_partial(con, end, size, con->auth_reply_buf);
-	if (ret <= 0)
-		goto out;
+	if (con->auth) {
+		size = le32_to_cpu(con->in_reply.authorizer_len);
+		if (size > con->auth->authorizer_reply_buf_len) {
+			pr_err("authorizer reply too big: %d > %zu\n", size,
+			       con->auth->authorizer_reply_buf_len);
+			ret = -EINVAL;
+			goto out;
+		}
+
+		end += size;
+		ret = read_partial(con, end, size,
+				   con->auth->authorizer_reply_buf);
+		if (ret <= 0)
+			goto out;
+	}
 
 	dout("read_partial_connect %p tag %d, con_seq = %u, g_seq = %u\n",
 	     con, (int)con->in_reply.tag,
@@ -1755,7 +1758,6 @@ static int read_partial_connect(struct ceph_connection *con)
 	     le32_to_cpu(con->in_reply.global_seq));
 out:
 	return ret;
-
 }
 
 /*
@@ -2039,13 +2041,28 @@ static int process_connect(struct ceph_connection *con)
 
 	dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
 
-	if (con->auth_reply_buf) {
+	if (con->auth) {
 		/*
 		 * Any connection that defines ->get_authorizer()
-		 * should also define ->verify_authorizer_reply().
+		 * should also define ->add_authorizer_challenge() and
+		 * ->verify_authorizer_reply().
+		 *
 		 * See get_connect_authorizer().
 		 */
-		ret = con->ops->verify_authorizer_reply(con, 0);
+		if (con->in_reply.tag == CEPH_MSGR_TAG_CHALLENGE_AUTHORIZER) {
+			ret = con->ops->add_authorizer_challenge(
+				    con, con->auth->authorizer_reply_buf,
+				    le32_to_cpu(con->in_reply.authorizer_len));
+			if (ret < 0)
+				return ret;
+
+			con_out_kvec_reset(con);
+			__prepare_write_connect(con);
+			prepare_read_connect(con);
+			return 0;
+		}
+
+		ret = con->ops->verify_authorizer_reply(con);
 		if (ret < 0) {
 			con->error_msg = "bad authorize reply";
 			return ret;
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 0ffeb60cfe67..70ccb0716fc5 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -4478,14 +4478,24 @@ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
 	return auth;
 }
 
+static int add_authorizer_challenge(struct ceph_connection *con,
+				    void *challenge_buf, int challenge_buf_len)
+{
+	struct ceph_osd *o = con->private;
+	struct ceph_osd_client *osdc = o->o_osdc;
+	struct ceph_auth_client *ac = osdc->client->monc.auth;
+
+	return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
+					    challenge_buf, challenge_buf_len);
+}
 
-static int verify_authorizer_reply(struct ceph_connection *con, int len)
+static int verify_authorizer_reply(struct ceph_connection *con)
 {
 	struct ceph_osd *o = con->private;
 	struct ceph_osd_client *osdc = o->o_osdc;
 	struct ceph_auth_client *ac = osdc->client->monc.auth;
 
-	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
+	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
 }
 
 static int invalidate_authorizer(struct ceph_connection *con)
@@ -4519,6 +4529,7 @@ static const struct ceph_connection_operations osd_con_ops = {
 	.put = put_osd_con,
 	.dispatch = dispatch,
 	.get_authorizer = get_authorizer,
+	.add_authorizer_challenge = add_authorizer_challenge,
 	.verify_authorizer_reply = verify_authorizer_reply,
 	.invalidate_authorizer = invalidate_authorizer,
 	.alloc_msg = alloc_msg,
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index d8d99c21a9c1..e6ee6acac80c 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -261,8 +261,8 @@ static struct net_device *__ip_tunnel_create(struct net *net,
 	} else {
 		if (strlen(ops->kind) > (IFNAMSIZ - 3))
 			goto failed;
-		strlcpy(name, ops->kind, IFNAMSIZ);
-		strncat(name, "%d", 2);
+		strcpy(name, ops->kind);
+		strcat(name, "%d");
 	}
 
 	ASSERT_RTNL();
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index c2646446e157..d62affeb2a38 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -389,7 +389,7 @@ int tipc_topsrv_start(struct net *net)
 	topsrv->tipc_conn_new		= tipc_subscrb_connect_cb;
 	topsrv->tipc_conn_release	= tipc_subscrb_release_cb;
 
-	strncpy(topsrv->name, name, strlen(name) + 1);
+	strscpy(topsrv->name, name, sizeof(topsrv->name));
 	tn->topsrv = topsrv;
 	atomic_set(&tn->subscription_count, 0);
 
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index fb3522fd8702..d08b6fbdfa85 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -10,6 +10,8 @@
 # are not supported by all versions of the compiler
 # ==========================================================================
 
+KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
+
 ifeq ("$(origin W)", "command line")
   export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
 endif
@@ -25,6 +27,7 @@ warning-1 += -Wold-style-definition
 warning-1 += $(call cc-option, -Wmissing-include-dirs)
 warning-1 += $(call cc-option, -Wunused-but-set-variable)
 warning-1 += $(call cc-option, -Wunused-const-variable)
+warning-1 += $(call cc-option, -Wpacked-not-aligned)
 warning-1 += $(call cc-disable-warning, missing-field-initializers)
 warning-1 += $(call cc-disable-warning, sign-compare)
 
diff --git a/scripts/unifdef.c b/scripts/unifdef.c
index 7493c0ee51cc..db00e3e30a59 100644
--- a/scripts/unifdef.c
+++ b/scripts/unifdef.c
@@ -395,7 +395,7 @@ usage(void)
  * When we have processed a group that starts off with a known-false
  * #if/#elif sequence (which has therefore been deleted) followed by a
  * #elif that we don't understand and therefore must keep, we edit the
- * latter into a #if to keep the nesting correct. We use strncpy() to
+ * latter into a #if to keep the nesting correct. We use memcpy() to
  * overwrite the 4 byte token "elif" with "if  " without a '\0' byte.
  *
  * When we find a true #elif in a group, the following block will
@@ -450,7 +450,7 @@ static void Idrop (void) { Fdrop();  ignoreon(); }
 static void Itrue (void) { Ftrue();  ignoreon(); }
 static void Ifalse(void) { Ffalse(); ignoreon(); }
 /* modify this line */
-static void Mpass (void) { strncpy(keyword, "if  ", 4); Pelif(); }
+static void Mpass (void) { memcpy(keyword, "if  ", 4); Pelif(); }
 static void Mtrue (void) { keywordedit("else");  state(IS_TRUE_MIDDLE); }
 static void Melif (void) { keywordedit("endif"); state(IS_FALSE_TRAILER); }
 static void Melse (void) { keywordedit("endif"); state(IS_FALSE_ELSE); }
diff --git a/sound/pci/trident/trident.c b/sound/pci/trident/trident.c
index cedf13b64803..2f18b1cdc2cd 100644
--- a/sound/pci/trident/trident.c
+++ b/sound/pci/trident/trident.c
@@ -123,7 +123,7 @@ static int snd_trident_probe(struct pci_dev *pci,
 	} else {
 		strcpy(card->shortname, "Trident ");
 	}
-	strcat(card->shortname, card->driver);
+	strcat(card->shortname, str);
 	sprintf(card->longname, "%s PCI Audio at 0x%lx, irq %d",
 		card->shortname, trident->port, trident->irq);
 