svn commit: r185828 - user/kmacy/head_arpv2/sys/netinet6

[Kip Macy]

Author: kmacy
Date: Wed Dec 10 03:16:30 2008
New Revision: 185828
URL: http://svn.freebsd.org/changeset/base/185828

Log:
  rt might be null do not dereference blindly

Modified:
  user/kmacy/head_arpv2/sys/netinet6/nd6.c

Modified: user/kmacy/head_arpv2/sys/netinet6/nd6.c
==============================================================================
--- user/kmacy/head_arpv2/sys/netinet6/nd6.c	Wed Dec 10 03:04:16 2008	(r185827)
+++ user/kmacy/head_arpv2/sys/netinet6/nd6.c	Wed Dec 10 03:16:30 2008	(r185828)
@@ -1110,11 +1110,12 @@ nd6_nud_hint(struct rtentry *rt, struct 
 {
 	INIT_VNET_INET6(curvnet);
 	struct llentry *ln;
-	struct ifnet *ifp = rt->rt_ifp;
+	struct ifnet *ifp;
 
-	if (dst6 == NULL)
+	if ((dst6 == NULL) || (rt == NULL))
 		return;
 
+	ifp = rt->rt_ifp;
 	IF_AFDATA_LOCK(ifp);
 	ln = nd6_lookup(dst6, ND6_EXCLUSIVE, NULL);
 	IF_AFDATA_UNLOCK(ifp);