--- in6.c.orig  2013-09-18 00:16:52.000000000 -0700
+++ in6.c       2013-09-18 00:18:08.000000000 -0700
@@ -611,6 +611,8 @@ in6_control(struct socket *so, u_long cm
 
        case SIOCSIFADDR:
        case SIOCSIFDSTADDR:
+       case SIOCSIFBRDADDR:
+       case SIOCSIFNETMASK:
                /*
                 * Do not pass those ioctl to driver handler since they are not
                 * properly setup.  Instead just error out.