linux-kernel - [PATCH 4.14 193/229] vsock: Set socket state back to SS_UNCONNECTED in vsock_connect

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220823080100.511422086@linuxfoundation.org>
Date:   Tue, 23 Aug 2022 10:25:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stefano Garzarella <sgarzare@...hat.com>,
        Peilin Ye <peilin.ye@...edance.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.14 193/229] vsock: Set socket state back to SS_UNCONNECTED in vsock_connect_timeout()

From: Peilin Ye <peilin.ye@...edance.com>

commit a3e7b29e30854ed67be0d17687e744ad0c769c4b upstream.

Imagine two non-blocking vsock_connect() requests on the same socket.
The first request schedules @connect_work, and after it times out,
vsock_connect_timeout() sets *sock* state back to TCP_CLOSE, but keeps
*socket* state as SS_CONNECTING.

Later, the second request returns -EALREADY, meaning the socket "already
has a pending connection in progress", even though the first request has
already timed out.

As suggested by Stefano, fix it by setting *socket* state back to
SS_UNCONNECTED, so that the second request will return -ETIMEDOUT.

Suggested-by: Stefano Garzarella <sgarzare@...hat.com>
Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
Signed-off-by: Peilin Ye <peilin.ye@...edance.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/vmw_vsock/af_vsock.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -1125,6 +1125,7 @@ static void vsock_connect_timeout(struct
 	if (sk->sk_state == TCP_SYN_SENT &&
 	    (sk->sk_shutdown != SHUTDOWN_MASK)) {
 		sk->sk_state = TCP_CLOSE;
+		sk->sk_socket->state = SS_UNCONNECTED;
 		sk->sk_err = ETIMEDOUT;
 		sk->sk_error_report(sk);
 		vsock_transport_cancel_pkt(vsk);