Commit 6fd6ce20 authored by YOSHIFUJI Hideaki / 吉藤英明's avatar YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller
Browse files

ipv6: Do not depend on rt->n in ip6_finish_output2(). 



If neigh is not found, create new one.

Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 707be1ff

net/ipv6/ip6_output.c

+13 −5
Original line number Original line Diff line number Diff line
@@ -88,7 +88,8 @@ static int ip6_finish_output2(struct sk_buff *skb) 
	struct dst_entry *dst = skb_dst(skb);

	struct dst_entry *dst = skb_dst(skb);

	struct net_device *dev = dst->dev;

	struct net_device *dev = dst->dev;

	struct neighbour *neigh;

	struct neighbour *neigh;

	struct rt6_info *rt;

	struct in6_addr *nexthop;

	int ret;





	skb->protocol = htons(ETH_P_IPV6);

	skb->protocol = htons(ETH_P_IPV6);

	skb->dev = dev;

	skb->dev = dev;
@@ -123,10 +124,17 @@ static int ip6_finish_output2(struct sk_buff *skb) 
				skb->len);

				skb->len);

	}

	}





	rt = (struct rt6_info *) dst;

	rcu_read_lock_bh();

	neigh = rt->n;

	nexthop = rt6_nexthop((struct rt6_info *)dst, &ipv6_hdr(skb)->daddr);

	if (neigh)

	neigh = __ipv6_neigh_lookup_noref(dst->dev, nexthop);

		return dst_neigh_output(dst, neigh, skb);

	if (unlikely(!neigh))

		neigh = __neigh_create(&nd_tbl, nexthop, dst->dev, false);

	if (!IS_ERR(neigh)) {

		ret = dst_neigh_output(dst, neigh, skb);

		rcu_read_unlock_bh();

		return ret;

	}

	rcu_read_unlock_bh();





	IP6_INC_STATS_BH(dev_net(dst->dev),

	IP6_INC_STATS_BH(dev_net(dst->dev),

			 ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);

			 ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);