unregister_netdevice: waiting for vcan0 to become free. Usage count = 1201
ref_tracker: netdev@00000000bc66dadc has 600/1200 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4528 [inline]
     netdev_hold include/linux/netdevice.h:4557 [inline]
     j1939_ecu_create_locked+0x1bc/0x404 net/can/j1939/bus.c:159
     j1939_local_ecu_get+0xc0/0x20c net/can/j1939/bus.c:293
     j1939_sk_bind+0x370/0x78c net/can/j1939/socket.c:529
     __sys_bind_socket net/socket.c:1945 [inline]
     __sys_bind+0x1c4/0x268 net/socket.c:1976
     __do_sys_bind net/socket.c:1981 [inline]
     __se_sys_bind net/socket.c:1979 [inline]
     __arm64_sys_bind+0x84/0x9c net/socket.c:1979
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
     do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
     el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
     el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
     el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606

ref_tracker: netdev@00000000bc66dadc has 600/1200 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4528 [inline]
     netdev_hold include/linux/netdevice.h:4557 [inline]
     j1939_priv_create net/can/j1939/main.c:140 [inline]
     j1939_netdev_start+0x220/0x744 net/can/j1939/main.c:268
     j1939_sk_bind+0x544/0x78c net/can/j1939/socket.c:506
     __sys_bind_socket net/socket.c:1945 [inline]
     __sys_bind+0x1c4/0x268 net/socket.c:1976
     __do_sys_bind net/socket.c:1981 [inline]
     __se_sys_bind net/socket.c:1979 [inline]
     __arm64_sys_bind+0x84/0x9c net/socket.c:1979
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
     do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
     el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
     el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
     el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606