Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1032-2.6.25-xen-silent-stack-overflow.patch
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Revision 609 -
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Fri May 23 17:35:37 2008 UTC (15 years, 11 months ago) by niro
File size: 955 byte(s)
Fri May 23 17:35:37 2008 UTC (15 years, 11 months ago) by niro
File size: 955 byte(s)
-using opensuse xen patchset, updated kernel configs
| 1 | diff -Naur linux-2.6.25/arch/x86/mm/fault-xen.c linux-2.6.25-xen/arch/x86/mm/fault-xen.c |
| 2 | --- linux-2.6.25/arch/x86/mm/fault-xen.c 2008-05-23 18:52:12.000000000 +0200 |
| 3 | +++ linux-2.6.25-xen/arch/x86/mm/fault-xen.c 2008-05-23 18:47:29.000000000 +0200 |
| 4 | @@ -590,7 +590,7 @@ |
| 5 | { |
| 6 | struct task_struct *tsk; |
| 7 | struct mm_struct *mm; |
| 8 | - struct vm_area_struct *vma; |
| 9 | + struct vm_area_struct * vma, * prev_vma; |
| 10 | unsigned long address; |
| 11 | int write, si_code; |
| 12 | int fault; |
| 13 | @@ -738,7 +738,13 @@ |
| 14 | if (address + 65536 + 32 * sizeof(unsigned long) < regs->sp) |
| 15 | goto bad_area; |
| 16 | } |
| 17 | - if (expand_stack(vma, address)) |
| 18 | + /* |
| 19 | + * find_vma_prev is just a bit slower, because it cannot |
| 20 | + * use the mmap_cache, so we run it only in the growsdown |
| 21 | + * slow path and we leave find_vma in the fast path. |
| 22 | + */ |
| 23 | + find_vma_prev(current->mm, address, &prev_vma); |
| 24 | + if (expand_stack(vma, address, prev_vma)) |
| 25 | goto bad_area; |
| 26 | /* |
| 27 | * Ok, we have a good vm_area for this memory access, so |