vhost-net: remove unlocked use of receive_queue

Use of skb_queue_empty(&sock->sk->sk_receive_queue)
without taking the sk_receive_queue.lock is unsafe
or useless. Take it out.

Reported-by:  Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 5720301..2f7c76a 100644 (file)
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -311,7 +311,7 @@ static void handle_rx(struct vhost_net *net)
        /* TODO: check that we are running from vhost_worker? */
        struct socket *sock = rcu_dereference_check(vq->private_data, 1);
 
-       if (!sock || skb_queue_empty(&sock->sk->sk_receive_queue))
+       if (!sock)
                return;
 
        mutex_lock(&vq->mutex);