'vhost_set_vring_enable()' tries to call function using pointer to
'vhost_ops' which can be already zeroized in 'vhost_dev_cleanup()'
while vhost disconnection.
Fix that by checking 'vhost_ops' before using. This fixes QEMU crash
on calling 'ethtool -L eth0 combined 2' if vhost disconnected.
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
nc->vring_enable = enable;
- if (vhost_ops->vhost_set_vring_enable) {
+ if (vhost_ops && vhost_ops->vhost_set_vring_enable) {
return vhost_ops->vhost_set_vring_enable(&net->dev, enable);
}