[PATCH] llc: Return -EINPROGRESS from llc_ui_connect()

[Ernestas Kulik]

Given a zero sk_sndtimeo, llc_ui_connect() skips waiting for state
change and returns 0, confusing userspace applications that will assume
the socket is connected, making e.g. getpeername() calls error out.

Set rc to -EINPROGRESS before considering blocking, akin to AF_INET
sockets.

Signed-off-by: Ernestas Kulik <ernestas.k@xxxxxxxxxxxxxxxxxx>
---
 net/llc/af_llc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 59d593bb5d18..9317d092ba84 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -515,10 +515,12 @@ static int llc_ui_connect(struct socket *sock, struct sockaddr_unsized *uaddr,
 		sock->state  = SS_UNCONNECTED;
 		sk->sk_state = TCP_CLOSE;
 		goto out;
 	}
 
+	rc = -EINPROGRESS;
+
 	if (sk->sk_state == TCP_SYN_SENT) {
 		const long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
 
 		if (!timeo || !llc_ui_wait_for_conn(sk, timeo))
 			goto out;
-- 
2.53.0