svn commit: r332475 - head/sys/netinet6

[Andrey V. Elsukov]

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) ||