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x86, e820: Guard against array overflowed in __e820_add_region()

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Better to be paranoid against unpredicted nr_map modifications.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
LKML-Reference: <20090824175551.146070377@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Cyrill Gorcunov 2009-08-24 21:53:37 +04:00 committed by Ingo Molnar
parent 2495fbf7ef
commit 5051fd6977
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/e820.c
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@ -115,7 +115,7 @@ static void __init __e820_add_region(struct e820map *e820x, u64 start, u64 size,
{
int x = e820x->nr_map;
if (x == ARRAY_SIZE(e820x->map)) {
if (x >= ARRAY_SIZE(e820x->map)) {
printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
return;
}