ipcalc: segmentation fault

[Cristian Ionescu-Idbohrn]

On Sat, 24 Sep 2005, Cristian Ionescu-Idbohrn wrote:

> ipcalc run without arguments segfaults:
>
>   # ./busybox ipcalc -n
>   segmentation fault
>
> I have verified this on the latest snapshot.

Patch attached, please apply.


Cheers,
Cristian
-------------- next part --------------
--- networking/ipcalc.c.orig	2005-09-24 09:20:22.000000000 +0200
+++ networking/ipcalc.c	2005-09-24 11:52:10.000000000 +0200
@@ -100,6 +100,9 @@
 			"mbn"
 #endif
 			);
+	if (argc - optind < 1) {
+		bb_error_msg_and_die("missing IP address argument");
+	}
 	if (mode & (BROADCAST | NETWORK | NETPREFIX)) {
 		if (argc - optind > 2) {
 			bb_show_usage();