diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-17 12:53:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-17 18:38:19 -0500 |
| commit | 145a36217adf91cdc6922c5b9cc985b87f8e0c73 (patch) | |
| tree | 6e883bf7f8fb1fcebc58c8385e9396232abcf796 | |
| parent | c440f1609b6516029ac5286e00fb86b3a11acd8e (diff) | |
| download | linux-145a36217adf91cdc6922c5b9cc985b87f8e0c73.tar.bz2 | |
ipv6: Do not depend on rt->n in rt6_check_neigh().
CC: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/route.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 2839381116ea..c7bcd777db23 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -546,20 +546,24 @@ static inline bool rt6_check_neigh(struct rt6_info *rt) struct neighbour *neigh; bool ret = false; - neigh = rt->n; if (rt->rt6i_flags & RTF_NONEXTHOP || !(rt->rt6i_flags & RTF_GATEWAY)) - ret = true; - else if (neigh) { - read_lock_bh(&neigh->lock); + return true; + + rcu_read_lock_bh(); + neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway); + if (neigh) { + read_lock(&neigh->lock); if (neigh->nud_state & NUD_VALID) ret = true; #ifdef CONFIG_IPV6_ROUTER_PREF else if (!(neigh->nud_state & NUD_FAILED)) ret = true; #endif - read_unlock_bh(&neigh->lock); + read_unlock(&neigh->lock); } + rcu_read_unlock_bh(); + return ret; } |