btrfs: don't leak ret from do_chunk_alloc

commit 4559b0a71749c442d34f7cfb9e72c9e58db83948 upstream.

If we're trying to make a data reservation and we have to allocate a
data chunk we could leak ret == 1, as do_chunk_alloc() will return 1 if
it allocated a chunk.  Since the end of the function is the success path
just return 0.

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 53487102081d6c8c2adfd46c2e9f83926166cb30..bbabe37c2e8cdc0fab26c8e6438e5ba68e05138b 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4407,7 +4407,7 @@ commit_trans:
                                      data_sinfo->flags, bytes, 1);
        spin_unlock(&data_sinfo->lock);
 
-       return ret;
+       return 0;
 }
 
 int btrfs_check_data_free_space(struct inode *inode,