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mm: fix prctl_set_vma_anon_name

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prctl_set_vma_anon_name could attempt to set the name across
two vmas at the same time due to a typo, which might corrupt
the vma list.  Fix it to use tmp instead of end to limit
the name setting to a single vma at a time.

Change-Id: Ie32d8ddb0fd547efbeedd6528acdab5ca5b308b4
Reported-by: Jed Davis <jld@mozilla.com>
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross 2014-08-05 12:05:17 -07:00
parent c3b04f9d63
commit 9bc0c15675
1 changed files with 1 additions and 1 deletions
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2
kernel/sys.c
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@ -2187,7 +2187,7 @@ static int prctl_set_vma_anon_name(unsigned long start, unsigned long end,
tmp = end;
/* Here vma->vm_start <= start < tmp <= (end|vma->vm_end). */
error = prctl_update_vma_anon_name(vma, &prev, start, end,
error = prctl_update_vma_anon_name(vma, &prev, start, tmp,
(const char __user *)arg);
if (error)
return error;