| From | Kamal Mostafa <> | Subject | [PATCH 3.8 071/116] Btrfs: fix double free in find_lock_delalloc_range | Date | Tue, 22 Jul 2014 15:21:22 -0700 |
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3.8.13.27 -stable 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: Kamal Mostafa <kamal@canonical.com> --- 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 125397e..0a800dc 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1595,6 +1595,7 @@ 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; -- 1.9.1
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