D13990.diff
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	Index: head/sys/net/route.c
	===================================================================
	--- head/sys/net/route.c
	+++ head/sys/net/route.c
	@@ -1733,6 +1733,8 @@
	int family, mtu;
	struct if_mtuinfo ifmtu;

	+ RIB_WLOCK_ASSERT(rnh);
	+
	rt = (struct rtentry *)rnh->rnh_lookup(info->rti_info[RTAX_DST],
	info->rti_info[RTAX_NETMASK], &rnh->head);

	@@ -1822,6 +1824,13 @@
	if_updatemtu_cb(rt->rt_nodes, &ifmtu);
	}
	}
	+
	+ /*
	+ * This route change may have modified the route's gateway. In that
	+ * case, any inpcbs that have cached this route need to invalidate their
	+ * llentry cache.
	+ */
	+ rnh->rnh_gen++;

	if (ret_nrt) {
	*ret_nrt = rt;