diff --git a/fs/namei.c b/fs/namei.c
index be3d538d56b3..2a8ba683a888 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3111,6 +3111,10 @@ static int do_last(struct nameidata *nd, struct path *path,
 			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);