From 4cd879515d686849eec5f718aeac62a70b067d82 Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Thu, 25 Jan 2018 22:03:52 +0800 Subject: [PATCH] vhost_net: stop device during reset owner We don't stop device before reset owner, this means we could try to serve any virtqueue kick before reset dev->worker. This will result a warn since the work was pending at llist during owner resetting. Fix this by stopping device during owner reset. Reported-by: syzbot+eb17c6162478cc50632c@syzkaller.appspotmail.com Fixes: 3a4d5c94e9593 ("vhost_net: a kernel-level virtio server") Signed-off-by: Jason Wang Signed-off-by: David S. Miller --- drivers/vhost/net.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 7baa90abe097..80323948c0dd 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1227,6 +1227,7 @@ static long vhost_net_reset_owner(struct vhost_net *n) } vhost_net_stop(n, &tx_sock, &rx_sock); vhost_net_flush(n); + vhost_dev_stop(&n->dev); vhost_dev_reset_owner(&n->dev, umem); vhost_net_vq_reset(n); done: