===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh-keygen.c,v
retrieving revision 1.448
retrieving revision 1.449
diff -u -r1.448 -r1.449
--- src/usr.bin/ssh/ssh-keygen.c	2022/02/01 23:32:51	1.448
+++ src/usr.bin/ssh/ssh-keygen.c	2022/03/18 02:31:25	1.449
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keygen.c,v 1.448 2022/02/01 23:32:51 djm Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.449 2022/03/18 02:31:25 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -3512,6 +3512,12 @@
 			return sig_sign(identity_file, cert_principals,
 			    argc, argv, opts, nopts);
 		} else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
+			if (cert_principals == NULL ||
+			    *cert_principals == '\0') {
+				error("Too few arguments for check-novalidate: "
+				    "missing namespace");
+				exit(1);
+			}
 			if (ca_key_path == NULL) {
 				error("Too few arguments for check-novalidate: "
 				    "missing signature file");