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Commit 4cd87951 authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

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: default avatar <syzbot+eb17c6162478cc50632c@syzkaller.appspotmail.com>
Fixes: 3a4d5c94 ("vhost_net: a kernel-level virtio server")
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e8368d9e

drivers/vhost/net.c

+1 −0
Original line number Diff line number Diff line
@@ -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: