unregister_netdevice: waiting for syz_tun to become free. Usage count = 2
ref_tracker: netdev@000000001b7762c0 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4471 [inline]
     netdev_hold include/linux/netdevice.h:4500 [inline]
     ib_device_set_netdev+0x274/0x5d0 drivers/infiniband/core/device.c:2226
     rxe_register_device+0x16c/0x2f4 drivers/infiniband/sw/rxe/rxe_verbs.c:1539
     rxe_add+0x8cc/0xd64 drivers/infiniband/sw/rxe/rxe.c:217
     rxe_net_add+0x80/0x110 drivers/infiniband/sw/rxe/rxe_net.c:623
     rxe_newlink+0x114/0x1c0 drivers/infiniband/sw/rxe/rxe.c:243
     nldev_newlink+0x478/0x4f0 drivers/infiniband/core/nldev.c:1812
     rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline]
     rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
     rdma_nl_rcv+0x568/0x828 drivers/infiniband/core/netlink.c:259
     netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
     netlink_unicast+0x610/0x800 net/netlink/af_netlink.c:1344
     netlink_sendmsg+0x63c/0x920 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:787 [inline]
     __sock_sendmsg+0xc8/0x138 net/socket.c:802
     ____sys_sendmsg+0x418/0x70c net/socket.c:2698
     ___sys_sendmsg+0x198/0x224 net/socket.c:2752
     __sys_sendmsg+0x160/0x214 net/socket.c:2784
     __do_sys_sendmsg net/socket.c:2789 [inline]
     __se_sys_sendmsg net/socket.c:2787 [inline]
     __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121