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neigh: check error pointer instead of NULL for ipv4_neigh_lookup()

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Fixes: commit f187bc6efb7250afee0e2009b6106 ("ipv4: No need to set generic neighbour pointer")
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong 2014-09-24 17:07:53 -07:00 committed by David S. Miller
parent 86fa9c424c
commit 2c1a4311b6
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/route.c
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@ -746,7 +746,7 @@ static void __ip_do_redirect(struct rtable *rt, struct sk_buff *skb, struct flow
}
n = ipv4_neigh_lookup(&rt->dst, NULL, &new_gw);
if (n) {
if (!IS_ERR(n)) {
if (!(n->nud_state & NUD_VALID)) {
neigh_event_send(n, NULL);
} else {