===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/sndioctl/sndioctl.c,v
retrieving revision 1.16
retrieving revision 1.17
diff -u -r1.16 -r1.17
--- src/usr.bin/sndioctl/sndioctl.c	2021/03/03 09:40:43	1.16
+++ src/usr.bin/sndioctl/sndioctl.c	2021/12/25 16:25:07	1.17
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sndioctl.c,v 1.16 2021/03/03 09:40:43 ratchov Exp $	*/
+/*	$OpenBSD: sndioctl.c,v 1.17 2021/12/25 16:25:07 ratchov Exp $	*/
 /*
  * Copyright (c) 2014-2020 Alexandre Ratchov <alex@caoua.org>
  *
@@ -706,6 +706,11 @@
 		}
 		break;
 	case SIOCTL_SEL:
+		if (*pos == '\0') {
+			fprintf(stderr, "%s.%s: expects value\n", astr, func);
+			exit(1);
+		}
+		/* FALLTROUGH */
 	case SIOCTL_VEC:
 	case SIOCTL_LIST:
 		for (i = g; i != NULL; i = nextpar(i)) {