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ipv6: Do not depend on rt->n in ip6_dst_lookup_tail().

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Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明
2013-01-17 12:53:55 +00:00
committed by David S. Miller
parent 9bb5a14813
commit 707be1ff3d
1 changed files with 6 additions and 2 deletions
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8
net/ipv6/ip6_output.c
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@@ -913,8 +913,12 @@ static int ip6_dst_lookup_tail(struct sock *sk,
* dst entry of the nexthop router * dst entry of the nexthop router
*/ */
rt = (struct rt6_info *) *dst; rt = (struct rt6_info *) *dst;
n = rt->n; rcu_read_lock_bh();
if (n && !(n->nud_state & NUD_VALID)) { n = __ipv6_neigh_lookup_noref(rt->dst.dev, rt6_nexthop(rt, &fl6->daddr));
err = n && !(n->nud_state & NUD_VALID) ? -EINVAL : 0;
rcu_read_unlock_bh();
if (err) {
struct inet6_ifaddr *ifp; struct inet6_ifaddr *ifp;
struct flowi6 fl_gw6; struct flowi6 fl_gw6;
int redirect; int redirect;