lkml.org 
[lkml]   [2009]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 38/45] x86: fix 64k corruption-check
-stable review patch.  If anyone has any objections, please let us know.
---------------------
From: Yinghai Lu <yinghai@kernel.org>

upstream commit: 6d7942dc2a70a7e74c352107b150265602671588

Impact: fix boot crash

Need to exit early if the addr is far above 64k.

The crash got exposed by:

78a8b35: x86: make e820_update_range() handle small range update

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: <stable@kernel.org>
LKML-Reference: <49BC2279.2030101@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---
arch/x86/kernel/check.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -86,12 +86,12 @@ void __init setup_bios_corruption_check(
if (addr == 0)
break;

+ if (addr >= corruption_check_size)
+ break;
+
if ((addr + size) > corruption_check_size)
size = corruption_check_size - addr;

- if (size == 0)
- break;
-
e820_update_range(addr, size, E820_RAM, E820_RESERVED);
scan_areas[num_scan_areas].addr = addr;
scan_areas[num_scan_areas].size = size;


\
 
 \ /
  Last update: 2009-04-01 01:39    [from the cache]
©2003-2011 Jasper Spaans