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Btrfs: fix double free in find_lock_delalloc_range

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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
This commit is contained in:
Chris Mason
2014-05-21 05:49:54 -07:00
parent 58dfae6365
commit 7d78874273
1 changed files with 1 additions and 0 deletions
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fs/btrfs/extent_io.c
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@@ -1693,6 +1693,7 @@ again:
* shortening the size of the delalloc range we're searching * shortening the size of the delalloc range we're searching
*/ */
free_extent_state(cached_state); free_extent_state(cached_state);
cached_state = NULL;
if (!loops) { if (!loops) {
max_bytes = PAGE_CACHE_SIZE; max_bytes = PAGE_CACHE_SIZE;
loops = 1; loops = 1;