rxrpc: Purge the to_be_accepted queue on socket release

Purge the queue of to_be_accepted calls on socket release.  Note that
purging sock_calls doesn't release the ref owned by to_be_accepted.

Probably the sock_calls list is redundant given a purges of the recvmsg_q,
the to_be_accepted queue and the calls tree.
Signed-off-by: David Howells <dhowells@redhat.com>

net/rxrpc/call_object.c

@@ -476,6 +476,16 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
 
 	_enter("%p", rx);
 
+	while (!list_empty(&rx->to_be_accepted)) {
+		call = list_entry(rx->to_be_accepted.next,
+				  struct rxrpc_call, accept_link);
+		list_del(&call->accept_link);
+		rxrpc_abort_call("SKR", call, 0, RX_CALL_DEAD, ECONNRESET);
+		rxrpc_send_call_packet(call, RXRPC_PACKET_TYPE_ABORT);
+		rxrpc_release_call(rx, call);
+		rxrpc_put_call(call, rxrpc_call_put);
+	}
+
 	while (!list_empty(&rx->sock_calls)) {
 		call = list_entry(rx->sock_calls.next,
 				  struct rxrpc_call, sock_link);