linux-kernel - [PATCH 3.12 024/181] Btrfs: don't leak block group on error

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Date:	Mon, 30 Jun 2014 13:50:45 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Filipe David Borba Manana <fdmanana@...il.com>,
	Josef Bacik <jbacik@...ionio.com>,
	Chris Mason <chris.mason@...ionio.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 024/181] Btrfs: don't leak block group on error

From: Filipe David Borba Manana <fdmanana@...il.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit e84cc14213e2c81ae5a2da341a9da0d58a1dbfad upstream.

In extent-tree.c:btrfs_write_dirty_block_groups(), if the call to
write_one_cache_group() failed, we would return without putting
the block group first.

Signed-off-by: Filipe David Borba Manana <fdmanana@...il.com>
Signed-off-by: Josef Bacik <jbacik@...ionio.com>
Signed-off-by: Chris Mason <chris.mason@...ionio.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/btrfs/extent-tree.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b256ddc1cb53..63ee604efa6c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3318,10 +3318,9 @@ again:
 		last = cache->key.objectid + cache->key.offset;
 
 		err = write_one_cache_group(trans, root, path, cache);
+		btrfs_put_block_group(cache);
 		if (err) /* File system offline */
 			goto out;
-
-		btrfs_put_block_group(cache);
 	}
 
 	while (1) {
-- 
2.0.0

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