message: VirtDevice::poll mutex unlocked by cond
diff: @@ -264,9 +264,9 @@ impl TcpTun {
  let manager = manager.clone();
  let manager_notify = manager_notify.clone();
  thread::spawn(move || {
  - while manager_notify.running() {
  let mut manager_guard = manager.lock();
  + while manager_notify.running() {
  let TcpSocketManager {
  ref mut iface,
  ref mut sockets,
  