[ 1621.688457][   T10] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1621.688826][   T10] ref_tracker: lo@ffff888034d6c5e0 has 1/1 users at
[ 1621.688826][   T10]      dst_init+0x84/0x4a0
[ 1621.688826][   T10]      dst_alloc+0x97/0x150
[ 1621.688826][   T10]      rt_dst_alloc+0x31/0x3b0
[ 1621.688826][   T10]      ip_route_input_slow+0xe6d/0x1f60
[ 1621.688826][   T10]      ip_route_input_noref+0xe6/0x230
[ 1621.688826][   T10]      ip_rcv_finish_core.constprop.0+0x63e/0x1470
[ 1621.688826][   T10]      ip_rcv+0x197/0x740
[ 1621.688826][   T10]      __netif_receive_skb_one_core+0x166/0x1b0
[ 1621.688826][   T10]      process_backlog+0x103/0x670
[ 1621.688826][   T10]      __napi_poll.constprop.0+0xa2/0x460
[ 1621.688826][   T10]      net_rx_action+0x49f/0xc00
[ 1621.688826][   T10]      __do_softirq+0x1f8/0x5df
[ 1621.688826][   T10] 
[ 1631.936435][   T10] unregister_netdevice: waiting for lo to become free. Usage count = 2
[ 1631.936796][   T10] ref_tracker: lo@ffff888034d6c5e0 has 1/1 users at
[ 1631.936796][   T10]      dst_init+0x84/0x4a0
[ 1631.936796][   T10]      dst_alloc+0x97/0x150
[ 1631.936796][   T10]      rt_dst_alloc+0x31/0x3b0
[ 1631.936796][   T10]      ip_route_input_slow+0xe6d/0x1f60
[ 1631.936796][   T10]      ip_route_input_noref+0xe6/0x230
[ 1631.936796][   T10]      ip_rcv_finish_core.constprop.0+0x63e/0x1470
[ 1631.936796][   T10]      ip_rcv+0x197/0x740
[ 1631.936796][   T10]      __netif_receive_skb_one_core+0x166/0x1b0
[ 1631.936796][   T10]      process_backlog+0x103/0x670
[ 1631.936796][   T10]      __napi_poll.constprop.0+0xa2/0x460
[ 1631.936796][   T10]      net_rx_action+0x49f/0xc00
[ 1631.936796][   T10]      __do_softirq+0x1f8/0x5df
[ 1631.936796][   T10] 
[ 1636.484777][T10640] ACPI: PM: Preparing to enter system sleep state S5
[ 1636.492876][T10640] kvm: exiting hardware virtualization
[ 1636.493164][T10640] reboot: Power down