tipc: disconnect socket directly after probe failure

If the TIPC connection timer expires in a probing state, a
self abort message is supposed to be generated and delivered
to the local socket. This is currently broken, and the abort
message is actually sent out to the peer node with invalid
addressing information. This will cause the link to enter
a constant retransmission state and eventually reset.
We fix this by removing the self-abort message creation and
tear down connection immediately instead.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 9074b5cede38b8edd75890b684a706d96b9f71ba..f485600c4507bc152cef654ae5667a03a52d990c 100644 (file)
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2142,11 +2142,17 @@ static void tipc_sk_timeout(unsigned long data)
        peer_node = tsk_peer_node(tsk);
 
        if (tsk->probing_state == TIPC_CONN_PROBING) {
-               /* Previous probe not answered -> self abort */
-               skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
-                                     TIPC_CONN_MSG, SHORT_H_SIZE, 0,
-                                     own_node, peer_node, tsk->portid,
-                                     peer_port, TIPC_ERR_NO_PORT);
+               if (!sock_owned_by_user(sk)) {
+                       sk->sk_socket->state = SS_DISCONNECTING;
+                       tsk->connected = 0;
+                       tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
+                                             tsk_peer_port(tsk));
+                       sk->sk_state_change(sk);
+               } else {
+                       /* Try again later */
+                       sk_reset_timer(sk, &sk->sk_timer, (HZ / 20));
+               }
+
        } else {
                skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE,
                                      INT_H_SIZE, 0, peer_node, own_node,