Like previous patch does, only moving skb drop logical code to
cookie_v6_check() for later refinement.
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
struct sock *ret = sk;
__u8 rcv_wscale;
int full_space;
+ SKB_DR(reason);
if (!READ_ONCE(net->ipv4.sysctl_tcp_syncookies) ||
!th->ack || th->rst)
ireq->ecn_ok &= cookie_ecn_ok(net, dst);
ret = tcp_get_cookie_sock(sk, skb, req, dst);
+ if (!ret)
+ goto out_drop;
out:
return ret;
out_free:
reqsk_free(req);
out_drop:
+ kfree_skb_reason(skb, reason);
return NULL;
}
if (sk->sk_state == TCP_LISTEN) {
struct sock *nsk = tcp_v6_cookie_check(sk, skb);
- if (!nsk)
- goto discard;
-
if (nsk != sk) {
- if (tcp_child_process(sk, nsk, skb))
+ if (nsk && tcp_child_process(sk, nsk, skb))
goto reset;
if (opt_skb)
__kfree_skb(opt_skb);