IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, id = 0 IPVS: stopping master sync thread 12296 ... IPVS: stopping master sync thread 12330 ... IPVS: stopping master sync thread 12340 ... IPVS: sync thread started: state = MASTER, mcast_ifn = syz_tun, syncid = 0, id = 0 unregister_netdevice: waiting for lo to become free. Usage count = 1