[PATCH 5.4 109/151] btrfs: ref-verify: fix memory leak in btrfs_ref_tree_mod

[Greg Kroah-Hartman]

From: Dinghao Liu <dinghao....@zju.edu.cn>

commit 468600c6ec28613b756193c5f780aac062f1acdf upstream.

There is one error handling path that does not free ref, which may cause
a minor memory leak.

CC: sta...@vger.kernel.org # 4.19+
Reviewed-by: Josef Bacik <jo...@toxicpanda.com>
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
Reviewed-by: David Sterba <dste...@suse.com>
Signed-off-by: David Sterba <dste...@suse.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 fs/btrfs/ref-verify.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -851,6 +851,7 @@ int btrfs_ref_tree_mod(struct btrfs_fs_i
 "dropping a ref for a root that doesn't have a ref on the block");
                        dump_block_entry(fs_info, be);
                        dump_ref_action(fs_info, ra);
+                       kfree(ref);
                        kfree(ra);
                        goto out_unlock;
                }