Author: ae
Date: Fri Apr 13 16:13:59 2018
New Revision: 332475
URL: https://svnweb.freebsd.org/changeset/base/332475

Log:
  Add check that mbuf had not multicast layer2 address.
  Such packets should be handled by ip6_mforward().
  
  Obtained from:        Yandex LLC
  MFC after:    1 week
  Sponsored by: Yandex LLC

Modified:
  head/sys/netinet6/ip6_fastfwd.c

Modified: head/sys/netinet6/ip6_fastfwd.c
==============================================================================
--- head/sys/netinet6/ip6_fastfwd.c     Fri Apr 13 15:59:24 2018        
(r332474)
+++ head/sys/netinet6/ip6_fastfwd.c     Fri Apr 13 16:13:59 2018        
(r332475)
@@ -97,7 +97,8 @@ ip6_tryforward(struct mbuf *m)
         * Fallback conditions to ip6_input for slow path processing.
         */
        ip6 = mtod(m, struct ip6_hdr *);
-       if (ip6->ip6_nxt == IPPROTO_HOPOPTS ||
+       if ((m->m_flags & (M_BCAST | M_MCAST)) != 0 ||
+           ip6->ip6_nxt == IPPROTO_HOPOPTS ||
            IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
            IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst) ||
            IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src) ||
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