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2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf

 kernel/net/x25/af_x25.c
.. .. @@ -492,6 +492,12 @@
492 492  	int rc = -EOPNOTSUPP;
493 493  
494 494  	lock_sock(sk);
495 +	if (sock->state != SS_UNCONNECTED) {
496 +		rc = -EINVAL;
497 +		release_sock(sk);
498 +		return rc;
499 +	}
500 +
495 501  	if (sk->sk_state != TCP_LISTEN) {
496 502  		memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
497 503  		sk->sk_max_ack_backlog = backlog;

..	..	@@ -492,6 +492,12 @@
492	492	int rc = -EOPNOTSUPP;
493	493
494	494	lock_sock(sk);
	495	+ if (sock->state != SS_UNCONNECTED) {
	496	+ rc = -EINVAL;
	497	+ release_sock(sk);
	498	+ return rc;
	499	+ }
	500	+
495	501	if (sk->sk_state != TCP_LISTEN) {
496	502	memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN);
497	503	sk->sk_max_ack_backlog = backlog;