Apply by doing: cd /usr/src patch -p0 < 014_pcb.patch Then build and install a new kernel. Index: sys/netinet/in_pcb.c =================================================================== RCS file: /cvs/src/sys/netinet/in_pcb.c,v retrieving revision 1.89 retrieving revision 1.89.2.1 diff -u -p -r1.89 -r1.89.2.1 --- sys/netinet/in_pcb.c 10 Apr 2007 17:47:55 -0000 1.89 +++ sys/netinet/in_pcb.c 30 Jul 2008 05:27:03 -0000 1.89.2.1 @@ -486,9 +486,10 @@ in_pcbdetach(v) if (inp->inp_route.ro_rt) rtfree(inp->inp_route.ro_rt); #ifdef INET6 - if (inp->inp_flags & INP_IPV6) + if (inp->inp_flags & INP_IPV6) { + ip6_freepcbopts(inp->inp_outputopts6); ip6_freemoptions(inp->inp_moptions6); - else + } else #endif ip_freemoptions(inp->inp_moptions); #ifdef IPSEC