| From | Ben Hutchings <> | Date | Tue, 08 Jul 2014 20:01:50 +0100 | Subject | [PATCH 3.2 071/125] Btrfs: fix double free in find_lock_delalloc_range |
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3.2.61-rc1 review patch. If anyone has any objections, please let me know.
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From: Chris Mason <clm@fb.com>
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: Ben Hutchings <ben@decadent.org.uk> --- fs/btrfs/extent_io.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1523,6 +1523,7 @@ again: * 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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