unregister_netdevice: waiting for lo to become free. Usage count = 2
ref_tracker: lo@ffff8880624de620 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     dst_init+0xda/0x580 net/core/dst.c:52
     dst_alloc+0xbb/0x1a0 net/core/dst.c:93
     rt_dst_clone+0x5a/0x860 net/ipv4/route.c:1640
     ip_mc_finish_output+0xaf/0x620 net/ipv4/ip_output.c:356
     NF_HOOK include/linux/netfilter.h:314 [inline]
     NF_HOOK include/linux/netfilter.h:308 [inline]
     ip_mc_output+0x5e1/0x6a0 net/ipv4/ip_output.c:400
     dst_output include/net/dst.h:450 [inline]
     dst_output include/net/dst.h:448 [inline]
     ip_local_out net/ipv4/ip_output.c:130 [inline]
     ip_send_skb net/ipv4/ip_output.c:1496 [inline]
     ip_push_pending_frames+0x3ad/0x5b0 net/ipv4/ip_output.c:1516
     raw_sendmsg+0x1475/0x3ad0 net/ipv4/raw.c:657
     inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:853
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg net/socket.c:744 [inline]
     ____sys_sendmsg+0x907/0xb40 net/socket.c:2607
     ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
     __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
     do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
     __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
     do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
     entry_SYSENTER_compat_after_hwframe+0x84/0x8e

unregister_netdevice: waiting for lo to become free. Usage count = 3
ref_tracker: lo@ffff888062a54620 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     netdev_hold include/linux/netdevice.h:4086 [inline]
     ib_device_set_netdev drivers/infiniband/core/device.c:2216 [inline]
     ib_device_set_netdev+0x2ec/0x850 drivers/infiniband/core/device.c:2185
     siw_device_create drivers/infiniband/sw/siw/siw_main.c:322 [inline]
     siw_newlink drivers/infiniband/sw/siw/siw_main.c:442 [inline]
     siw_newlink+0x4a3/0xf80 drivers/infiniband/sw/siw/siw_main.c:428
     nldev_newlink+0x36f/0x5e0 drivers/infiniband/core/nldev.c:1795
     rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
     rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg net/socket.c:744 [inline]
     ____sys_sendmsg+0x9ae/0xb40 net/socket.c:2607
     ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
     __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
     do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
     __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
     do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
     entry_SYSENTER_compat_after_hwframe+0x84/0x8e