--- contrib/isc-dhcp/client/dhclient.c.orig	Mon Mar 24 00:33:05 2003
+++ contrib/isc-dhcp/client/dhclient.c	Tue Sep 29 23:00:09 2009
@@ -2467,6 +2467,8 @@
 		if (data.len > 3) {
 			struct iaddr netmask, subnet, broadcast;
 
+			if (data.len > sizeof netmask.iabuf)
+			    data.len = sizeof netmask.iabuf;
 			memcpy (netmask.iabuf, data.data, data.len);
 			netmask.len = data.len;
 			data_string_forget (&data, MDL);