From: Jorgen Hansen <redacted>
Date: Mon, 26 Sep 2016 23:59:53 -0700

If a pending socket is marked as rejected, we will decrease the
sk_ack_backlog twice. So don't decrement it for rejected sockets
in vsock_pending_work().

Testing of the rejected socket path was done through code
modifications.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jorgen Hansen <redacted>
Reviewed-by: Adit Ranadive <redacted>
Reviewed-by: Aditya Sarwade <redacted>

Applied, thanks.