unregister_netdevice: waiting for syz_tun to become free. Usage count = 2
ref_tracker: netdev@00000000e9d4f927 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_hold include/linux/netdevice.h:4378 [inline]
     netdev_hold include/linux/netdevice.h:4373 [inline]
     ib_device_set_netdev drivers/infiniband/core/device.c:2253 [inline]
     ib_device_set_netdev+0x1cc/0x580 drivers/infiniband/core/device.c:2222
     rxe_register_device+0x200/0x2b8 drivers/infiniband/sw/rxe/rxe_verbs.c:1552
     rxe_add+0xd60/0x10c8 drivers/infiniband/sw/rxe/rxe.c:212
     rxe_net_add+0x9c/0xf4 drivers/infiniband/sw/rxe/rxe_net.c:537
     rxe_newlink+0x58/0x14c drivers/infiniband/sw/rxe/rxe.c:234
     nldev_newlink+0x280/0x4b4 drivers/infiniband/core/nldev.c:1797
     rdma_nl_rcv_msg+0x274/0x56c drivers/infiniband/core/netlink.c:195
     rdma_nl_rcv_skb.constprop.0.isra.0+0x1f0/0x328 drivers/infiniband/core/netlink.c:239
     rdma_nl_rcv+0x10/0x1c drivers/infiniband/core/netlink.c:259
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x424/0x700 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x644/0xa54 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:714 [inline]
     __sock_sendmsg+0xc8/0x168 net/socket.c:729
     ____sys_sendmsg+0x500/0x764 net/socket.c:2614
     ___sys_sendmsg+0x11c/0x19c net/socket.c:2668
     __sys_sendmsg+0x114/0x19c net/socket.c:2700
     __do_sys_sendmsg net/socket.c:2705 [inline]
     __se_sys_sendmsg net/socket.c:2703 [inline]
     __arm64_sys_sendmsg+0x70/0xa0 net/socket.c:2703