This is a note to let you know that I've just added the patch titled
vhost_net: stop device during reset owner
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: vhost_net-stop-device-during-reset-owner.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Tue Feb 6 12:42:23 PST 2018
From: Jason Wang jasowang@redhat.com Date: Thu, 25 Jan 2018 22:03:52 +0800 Subject: vhost_net: stop device during reset owner
From: Jason Wang jasowang@redhat.com
[ Upstream commit 4cd879515d686849eec5f718aeac62a70b067d82 ]
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 jasowang@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/vhost/net.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1078,6 +1078,7 @@ static long vhost_net_reset_owner(struct } 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:
Patches currently in stable-queue which might be from jasowang@redhat.com are
queue-4.9/vhost_net-stop-device-during-reset-owner.patch