Index: head/usr.sbin/makefs/cd9660.c
===================================================================
--- head/usr.sbin/makefs/cd9660.c
+++ head/usr.sbin/makefs/cd9660.c
@@ -1070,7 +1070,7 @@
 
 	tmp = malloc(ISO_FILENAME_MAXLENGTH_WITH_PADDING);
 
-	while (i < num) {
+	while (i < num && iter) {
 		powers = 1;
 		count = 0;
 		digits = 1;