diff -urN util-linux-2.31.1/login-utils/su-common.c util-linux-2.31.1/login-utils/su-common.c
--- util-linux-2.31.1/login-utils/su-common.c	2018-11-21 10:56:05.100179733 +0100
+++ util-linux-2.31.1/login-utils/su-common.c	2018-11-21 11:10:40.458312830 +0100
@@ -709,7 +709,6 @@
 		 */
 		if (su->restricted)
 			errx(EXIT_FAILURE, _("may not be used by non-root users"));
-		return;
 	}
 
 	rc = pam_authenticate(su->pamh, 0);