Index: usr.bin/systat/devs.c
===================================================================
--- usr.bin/systat/devs.c
+++ usr.bin/systat/devs.c
@@ -202,10 +202,10 @@
 		if (**tempstr != '\0')
 			if (++tempstr >= &tstr[100])
 				break;
-	free(tmpstr);
 
 	if (num_args > 99) {
 		warnx("dsmatchselect: too many match arguments");
+		free(tmpstr);
 		return(0);
 	}
 
@@ -222,9 +222,11 @@
 	for (i = 0; i < num_args; i++) {
 		if (devstat_buildmatch(tstr[i], &matches, &num_matches) != 0) {
 			warnx("%s", devstat_errbuf);
+			free(tmpstr);
 			return(0);
 		}
 	}
+	free(tmpstr);
 	if (num_args > 0) {
 
 		last_type = DS_MATCHTYPE_PATTERN;