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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/netrom/af_netrom.c
..
..
@@ -400,6 +400,11 @@
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 	struct sock *sk = sock->sk;
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401
 
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 	lock_sock(sk);
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+	if (sock->state != SS_UNCONNECTED) {
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+		release_sock(sk);
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+		return -EINVAL;
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+	}
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+
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 	if (sk->sk_state != TCP_LISTEN) {
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 		memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
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 		sk->sk_max_ack_backlog = backlog;
..
..
@@ -655,6 +660,11 @@
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 		goto out_release;
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 	}
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+	if (sock->state == SS_CONNECTING) {
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+		err = -EALREADY;
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+		goto out_release;
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+	}
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+
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 	sk->sk_state   = TCP_CLOSE;
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 	sock->state = SS_UNCONNECTED;
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