Btrfs: fix possible memory leak in btrfs_create_tree()

In btrfs_create_tree(), if btrfs_insert_root() fails, we should
free root->commit_root.

Reported-by: Alex Lyakas <alex@zadarastorage.com>
Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index cf8427a7a615ea0e252a2ea2fb737a98314319fa..d3bd34e434f62f038f23599d920173f42931f405 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1366,6 +1366,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
 fail:
        if (leaf) {
                btrfs_tree_unlock(leaf);
+               free_extent_buffer(root->commit_root);
                free_extent_buffer(leaf);
        }
        kfree(root);