ipv6: Do not depend on rt->n in ip6_dst_lookup_tail().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 9250c69..7c00edb 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -913,8 +913,12 @@
* dst entry of the nexthop router
*/
rt = (struct rt6_info *) *dst;
- n = rt->n;
- if (n && !(n->nud_state & NUD_VALID)) {
+ rcu_read_lock_bh();
+ 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 flowi6 fl_gw6;
int redirect;