[src/trunk]: src/sys/netinet6 avoid panic on getsockopt(ICMPV6_FILTER).

[itojun <itojun%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d3e390aef167
branches:  trunk
changeset: 480158:d3e390aef167
user:      itojun <itojun%NetBSD.org@localhost>
date:      Wed Jan 05 16:46:18 2000 +0000

description:
avoid panic on getsockopt(ICMPV6_FILTER).

diffstat:

 sys/netinet6/icmp6.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (25 lines):

diff -r 1cf9e61b5443 -r d3e390aef167 sys/netinet6/icmp6.c
--- a/sys/netinet6/icmp6.c      Wed Jan 05 16:33:01 2000 +0000
+++ b/sys/netinet6/icmp6.c      Wed Jan 05 16:46:18 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: icmp6.c,v 1.14 2000/01/02 16:31:18 itojun Exp $        */
+/*     $NetBSD: icmp6.c,v 1.15 2000/01/05 16:46:18 itojun Exp $        */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -2041,11 +2041,13 @@
                  {
                          struct icmp6_filter *p;
 
-                         p = mtod(m, struct icmp6_filter *);
-                         if (!p || !in6p->in6p_icmp6filt) {
+                         if (!in6p->in6p_icmp6filt) {
                                  error = EINVAL;
                                  break;
                          }
+                         *mp = m = m_get(M_WAIT, MT_SOOPTS);
+                         m->m_len = sizeof(struct icmp6_filter);
+                         p = mtod(m, struct icmp6_filter *);
                          bcopy(in6p->in6p_icmp6filt, p,
                                sizeof(struct icmp6_filter));
                          error = 0;