From bddf0faccf1dd39ec80059eb5266766e6bf0134c Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 21 May 2014 05:49:54 -0700 Subject: [PATCH] Btrfs: fix double free in find_lock_delalloc_range 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 Signed-off-by: Greg Kroah-Hartman --- 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 3955e475ceece..ba7c7b60ffb46 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1693,6 +1693,7 @@ 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; -- 2.47.3