D15440.id42584.diff
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	Index: head/sys/netinet/in_mcast.c
	===================================================================
	--- head/sys/netinet/in_mcast.c
	+++ head/sys/netinet/in_mcast.c
	@@ -344,12 +344,13 @@

	inm = NULL;
	TAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
	- if (ifma->ifma_addr->sa_family == AF_INET) {
	- inm = (struct in_multi *)ifma->ifma_protospec;
	- if (inm->inm_addr.s_addr == ina.s_addr)
	- break;
	- inm = NULL;
	- }
	+ if (ifma->ifma_addr->sa_family != AF_INET \|\|
	+ ifma->ifma_protospec == NULL)
	+ continue;
	+ inm = (struct in_multi *)ifma->ifma_protospec;
	+ if (inm->inm_addr.s_addr == ina.s_addr)
	+ break;
	+ inm = NULL;
	}
	return (inm);
	}