Btrfs: fix double free in find_lock_delalloc_range

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
git-mirror · Jun 10, 2014 · 7d78874 · 7d78874
1 parent 58dfae6
commit 7d78874
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
@@ -1693,6 +1693,7 @@ STATIC u64 find_lock_delalloc_range(struct inode *inode,
 		 * 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;