diff --git a/fs/namei.c b/fs/namei.c
index f624d132e01e6f5488fd0d9af13007b015e1e178..e30deefad8f8718aa4ca75c42501da60f3e1942e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3273,6 +3273,10 @@ static int do_last(struct nameidata *nd,
 			goto exit_fput;
 	}
 out:
+	if (unlikely(error > 0)) {
+		WARN_ON(1);
+		error = -EINVAL;
+	}
 	if (got_write)
 		mnt_drop_write(nd->path.mnt);
 	path_put(&save_parent);