Commit a25ebe21 authored by Chris Mason's avatar Chris Mason Committed by Greg Kroah-Hartman

Btrfs: fix double free in find_lock_delalloc_range

commit 7d788742 upstream.

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: default avatarChris Mason <clm@fb.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2edae61b
......@@ -1551,6 +1551,7 @@ static noinline 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) {
unsigned long offset = (*start) & (PAGE_CACHE_SIZE - 1);
max_bytes = PAGE_CACHE_SIZE - offset;
......
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