unregister_netdevice: waiting for vcan0 to become free. Usage count = 2
ref_tracker: vcan0@ffff88802cdc05b8 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4112 [inline]
     netdev_hold include/linux/netdevice.h:4141 [inline]
     j1939_priv_create net/can/j1939/main.c:140 [inline]
     j1939_netdev_start+0x37c/0xaf0 net/can/j1939/main.c:268
     j1939_sk_bind+0x8a7/0xc00 net/can/j1939/socket.c:497
     __sys_bind+0x2f0/0x3f0 net/socket.c:1856
     __do_sys_bind net/socket.c:1867 [inline]
     __se_sys_bind net/socket.c:1865 [inline]
     __x64_sys_bind+0x7a/0x90 net/socket.c:1865
     do_syscall_x64 arch/x86/entry/common.c:46 [inline]
     do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
     entry_SYSCALL_64_after_hwframe+0x68/0xd2