tcp: add rcu protection around tp->fastopen_rsk

[linux-2.6-block.git] / net / ipv6 / tcp_ipv6.c

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index e3d9f4559c99f252eba448845cce434bc53f3fd8..45a95e032bdfe8ffb05309bed8a967ee08690293 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -406,7 +406,7 @@ static int tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 
        tp = tcp_sk(sk);
        /* XXX (TFO) - tp->snd_una should be ISN (tcp_create_openreq_child() */
-       fastopen = tp->fastopen_rsk;
+       fastopen = rcu_dereference(tp->fastopen_rsk);
        snd_una = fastopen ? tcp_rsk(fastopen)->snt_isn : tp->snd_una;
        if (sk->sk_state != TCP_LISTEN &&
            !between(seq, snd_una, tp->snd_nxt)) {