unregister_netdevice: waiting for vcan0 to become free. Usage count = 3
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4044 [inline]
 netdev_hold include/linux/netdevice.h:4073 [inline]
 j1939_ecu_create_locked+0x1c2/0x400 net/can/j1939/bus.c:159
 j1939_local_ecu_get+0xb8/0x3f0 net/can/j1939/bus.c:293
 j1939_sk_bind+0x66c/0xc00 net/can/j1939/socket.c:520
 __sys_bind+0x2e9/0x3e0 net/socket.c:1811
 __do_sys_bind net/socket.c:1822 [inline]
 __se_sys_bind net/socket.c:1820 [inline]
 __x64_sys_bind+0x76/0x80 net/socket.c:1820
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4044 [inline]
 netdev_hold include/linux/netdevice.h:4073 [inline]
 j1939_priv_create net/can/j1939/main.c:140 [inline]
 j1939_netdev_start+0x378/0xaf0 net/can/j1939/main.c:268
 j1939_sk_bind+0x8a3/0xc00 net/can/j1939/socket.c:497
 __sys_bind+0x2e9/0x3e0 net/socket.c:1811
 __do_sys_bind net/socket.c:1822 [inline]
 __se_sys_bind net/socket.c:1820 [inline]
 __x64_sys_bind+0x76/0x80 net/socket.c:1820
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2