unregister_netdevice: waiting for syz_tun to become free. Usage count = 2
ref_tracker: netdev@000000002dd7c62b has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4499 [inline]
     netdev_hold include/linux/netdevice.h:4528 [inline]
     ib_device_set_netdev+0x270/0x5cc drivers/infiniband/core/device.c:2234
     rxe_register_device+0x170/0x30c drivers/infiniband/sw/rxe/rxe_verbs.c:1539
     rxe_add+0x8cc/0xd68 drivers/infiniband/sw/rxe/rxe.c:217
     rxe_net_add+0x80/0x114 drivers/infiniband/sw/rxe/rxe_net.c:625
     rxe_newlink+0x114/0x1c0 drivers/infiniband/sw/rxe/rxe.c:243
     nldev_newlink+0x478/0x4f0 drivers/infiniband/core/nldev.c:1816
     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+0x4f0/0x814 drivers/infiniband/core/netlink.c:259
     netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
     netlink_unicast+0x600/0x7f8 net/netlink/af_netlink.c:1345
     netlink_sendmsg+0x648/0x948 net/netlink/af_netlink.c:1900
     sock_sendmsg_nosec net/socket.c:775 [inline]
     __sock_sendmsg+0xc8/0x17c net/socket.c:790
     ____sys_sendmsg+0x3d0/0x6c8 net/socket.c:2684
     ___sys_sendmsg+0x198/0x224 net/socket.c:2738
     __sys_sendmsg+0x158/0x204 net/socket.c:2770
     __do_sys_sendmsg net/socket.c:2775 [inline]
     __se_sys_sendmsg net/socket.c:2773 [inline]
     __arm64_sys_sendmsg+0x88/0x9c net/socket.c:2773
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0x19c/0x23c arch/arm64/kernel/syscall.c:121