Apply by doing:
cd /usr/src
patch -p0 < 005_in6.patch
Then build and install a new kernel.
Index: sys/netinet6/in6.c
===================================================================
RCS file: /cvs/src/sys/netinet6/in6.c,v
retrieving revision 1.98
retrieving revision 1.98.2.1
diff -u -p -r1.98 -r1.98.2.1
--- sys/netinet6/in6.c 14 Jul 2012 17:23:16 -0000 1.98
+++ sys/netinet6/in6.c 30 May 2013 20:41:54 -0000 1.98.2.1
@@ -425,6 +425,12 @@ in6_control(struct socket *so, u_long cm
case SIOCGIFSTAT_ICMP6:
sa6 = &ifr->ifr_addr;
break;
+ case SIOCSIFADDR:
+ /*
+ * Do not pass this ioctl to driver handler since it is not
+ * properly setup. Instead just error out.
+ */
+ return (EOPNOTSUPP);
default:
sa6 = NULL;
break;