Merge branch 'linux-linaro-lsk-v4.4-android' of git://git.linaro.org/kernel/linux...

[firefly-linux-kernel-4.4.55.git] / net / ipv4 / tcp_ipv4.c

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index f66696c51c8ca23f582b937b82cfa40635041b5d..7decaa4393605749796bcf96e4fc3e102182f1d5 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -320,8 +320,6 @@ void tcp_req_err(struct sock *sk, u32 seq, bool abort)
        /* ICMPs are not backlogged, hence we cannot get
         * an established socket here.
         */
-       WARN_ON(req->sk);
-
        if (seq != tcp_rsk(req)->snt_isn) {
                NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
        } else if (abort) {
@@ -1594,28 +1592,30 @@ process:
 
        if (sk->sk_state == TCP_NEW_SYN_RECV) {
                struct request_sock *req = inet_reqsk(sk);
-               struct sock *nsk = NULL;
+               struct sock *nsk;
 
                sk = req->rsk_listener;
-               if (tcp_v4_inbound_md5_hash(sk, skb))
-                       goto discard_and_relse;
-               if (likely(sk->sk_state == TCP_LISTEN)) {
-                       nsk = tcp_check_req(sk, skb, req, false);
-               } else {
+               if (unlikely(tcp_v4_inbound_md5_hash(sk, skb))) {
+                       reqsk_put(req);
+                       goto discard_it;
+               }
+               if (unlikely(sk->sk_state != TCP_LISTEN)) {
                        inet_csk_reqsk_queue_drop_and_put(sk, req);
                        goto lookup;
                }
+               sock_hold(sk);
+               nsk = tcp_check_req(sk, skb, req, false);
                if (!nsk) {
                        reqsk_put(req);
-                       goto discard_it;
+                       goto discard_and_relse;
                }
                if (nsk == sk) {
-                       sock_hold(sk);
                        reqsk_put(req);
                } else if (tcp_child_process(sk, nsk, skb)) {
                        tcp_v4_send_reset(nsk, skb);
-                       goto discard_it;
+                       goto discard_and_relse;
                } else {
+                       sock_put(sk);
                        return 0;
                }
        }
@@ -2349,6 +2349,7 @@ struct proto tcp_prot = {
        .destroy_cgroup         = tcp_destroy_cgroup,
        .proto_cgroup           = tcp_proto_cgroup,
 #endif
+       .diag_destroy           = tcp_abort,
 };
 EXPORT_SYMBOL(tcp_prot);