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Btrfs: fix double free in find_lock_delalloc_range
author
Chris Mason
<clm@fb.com>
Wed, 21 May 2014 12:49:54 +0000
(
05:49
-0700)
committer
Chris Mason
<clm@fb.com>
Tue, 10 Jun 2014 00:20:52 +0000
(17:20 -0700)
We need to NULL the cached_state after freeing it, otherwise
we might free it again if find_delalloc_range doesn't find anything.
Signed-off-by: Chris Mason <clm@fb.com>
cc: stable@vger.kernel.org
fs/btrfs/extent_io.c
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diff --git
a/fs/btrfs/extent_io.c
b/fs/btrfs/extent_io.c
index
8285ed0
..
0f425de
100644
(file)
--- a/
fs/btrfs/extent_io.c
+++ b/
fs/btrfs/extent_io.c
@@
-1693,6
+1693,7
@@
again:
* shortening the size of the delalloc range we're searching
*/
free_extent_state(cached_state);
+ cached_state = NULL;
if (!loops) {
max_bytes = PAGE_CACHE_SIZE;
loops = 1;