Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1115-2.6.25-xen-Make-xen_start_info-read-only.patch
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Thu May 22 23:13:13 2008 UTC (16 years, 4 months ago) by niro
File size: 966 byte(s)
Thu May 22 23:13:13 2008 UTC (16 years, 4 months ago) by niro
File size: 966 byte(s)
-ver bump to 2.6.25-magellan-r1: - linux-2.6.25.4 - fbcondecor-0.9.4 - squashfs-3.3 - unionfs-2.3.3 - tuxonice-3.0-rc7 - linux-phc-0.3.0 - acpi-dstd-0.9a - reiser4 - xen-3.2.0 . ipw3945-1.2.2
1 | From e353e5b752fdf09a53678852fba4c6aeca0521fc Mon Sep 17 00:00:00 2001 |
2 | From: Eduardo Habkost <ehabkost@redhat.com> |
3 | Date: Mon, 14 Jan 2008 20:20:55 -0200 |
4 | Subject: [PATCH] Make xen_start_info read-only |
5 | |
6 | It will aid debugging, catching if anybody tries to write to it. |
7 | |
8 | Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> |
9 | --- |
10 | arch/x86/mm/init_64.c | 6 ++++++ |
11 | 1 files changed, 6 insertions(+), 0 deletions(-) |
12 | |
13 | diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c |
14 | index 48f9912..0e017e5 100644 |
15 | --- a/arch/x86/mm/init_64.c |
16 | +++ b/arch/x86/mm/init_64.c |
17 | @@ -495,6 +495,12 @@ static void xen_finish_init_mapping(void) |
18 | __va(__pa(xen_start_info->mod_start)); |
19 | |
20 | xprintk("messed with start_info.\n"); |
21 | + xprintk("making it read-only:\n"); |
22 | + |
23 | + /* Make it read-only to catch if anybody touches it by accident. |
24 | + */ |
25 | + __make_page_readonly(xen_start_info); |
26 | + |
27 | xprintk("unmapping:\n"); |
28 | |
29 | /* Destroy the Xen-created mappings beyond the kernel image as |
30 | -- |
31 | 1.5.4.1 |
32 |