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x86: fix 64k corruption-check 

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>
This commit is contained in:
Yinghai Lu 2009-03-14 14:32:41 -07:00 committed by Ingo Molnar
parent 78a8b35bc7
commit 6d7942dc2a
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kernel/check.c
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@ -86,12 +86,12 @@ void __init setup_bios_corruption_check(void)
if (!(addr + 1))
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;