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| author | Jason Wang <jasowang@redhat.com> | 2018-01-25 22:03:52 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-29 12:26:20 -0500 |
| commit | 4cd879515d686849eec5f718aeac62a70b067d82 (patch) | |
| tree | 8877aa0e26df62b6f4d62a6f7553a0c3fb9e648a | |
| parent | e8368d9ebb9413ee9c24c91f0a48d39c764c242c (diff) | |
| download | linux-4cd879515d686849eec5f718aeac62a70b067d82.tar.gz linux-4cd879515d686849eec5f718aeac62a70b067d82.tar.bz2 linux-4cd879515d686849eec5f718aeac62a70b067d82.zip | |
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 <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/vhost/net.c | 1 |
1 files changed, 1 insertions, 0 deletions
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: |