| From | Jiri Slaby <> | Subject | [PATCH 3.12 163/181] Btrfs: fix double free in find_lock_delalloc_range | Date | Mon, 30 Jun 2014 13:53:04 +0200 |
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From: Chris Mason <clm@fb.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 7d78874273463a784759916fc3e0b4e2eb141c70 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: Chris Mason <clm@fb.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- fs/btrfs/extent_io.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 51731b76900d..0d611d1e2e34 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1645,6 +1645,7 @@ 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; -- 2.0.0
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