diff options
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 8c2e3ab58f2a..496b62712fe8 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -121,9 +121,22 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) return p; } +static inline const void *choose_neigh_daddr(struct rt6_info *rt, const void *daddr) +{ + struct in6_addr *p = &rt->rt6i_gateway; + + if (!ipv6_addr_any(p)) + return (const void *) p; + return daddr; +} + static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, const void *daddr) { - struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); + struct rt6_info *rt = (struct rt6_info *) dst; + struct neighbour *n; + + daddr = choose_neigh_daddr(rt, daddr); + n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); if (n) return n; return neigh_create(&nd_tbl, daddr, dst->dev); @@ -1077,7 +1090,7 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct net *net = dev_net(dev); if (unlikely(!idev)) - return NULL; + return ERR_PTR(-ENODEV); rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev, 0); if (unlikely(!rt)) { @@ -2461,8 +2474,12 @@ static int rt6_fill_node(struct net *net, rcu_read_lock(); n = dst_get_neighbour_noref(&rt->dst); - if (n) - NLA_PUT(skb, RTA_GATEWAY, 16, &n->primary_key); + if (n) { + if (nla_put(skb, RTA_GATEWAY, 16, &n->primary_key) < 0) { + rcu_read_unlock(); + goto nla_put_failure; + } + } rcu_read_unlock(); if (rt->dst.dev) |