Index: sys/net/if.c
===================================================================
RCS file: /home/ncvs/src/sys/net/if.c,v
retrieving revision 1.225
diff -u -p -r1.225 if.c
--- sys/net/if.c	20 Mar 2005 14:31:45 -0000	1.225
+++ sys/net/if.c	14 Apr 2005 22:06:17 -0000
@@ -1596,6 +1596,12 @@ again:
 	TAILQ_FOREACH(ifp, &ifnet, if_link) {
 		int addrs;
 
+		/*
+		 * Zero the ifr_name buffer to make sure we don't
+		 * disclose the contents of the stack.
+		 */
+		memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
+
 		if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
 		    >= sizeof(ifr.ifr_name))
 			return (ENAMETOOLONG);