cdc_ncm 1-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.0-1, CDC NCM (NO ZLP) ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: 000000004d314f2d object type: work_struct hint: usbnet_deferred_kevent+0x0/0xa74 drivers/net/usb/usbnet.c:658 WARNING: CPU: 1 PID: 30437 at lib/debugobjects.c:514 debug_print_object+0x184/0x264 lib/debugobjects.c:514 Modules linked in: CPU: 1 PID: 30437 Comm: kworker/1:5 Not tainted 6.9.0-rc1-syzkaller-00005-g928a87efa423 #0 Hardware name: linux,dummy-virt (DT) Workqueue: usb_hub_wq hub_event pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object+0x184/0x264 lib/debugobjects.c:514 lr : debug_print_object+0x184/0x264 lib/debugobjects.c:514 sp : ffff80008c5970a0 x29: ffff80008c5970a0 x28: dfff800000000000 x27: 0000000000000004 x26: ffff8000801c9524 x25: ffff80008c597228 x24: ffff8000851d5320 x23: 0000000000000003 x22: ffff80008672fc38 x21: ffff800084f15780 x20: ffff8000851d4b20 x19: ffff80008c597210 x18: ffff0000679c0a70 x17: 0000000000000000 x16: 0000000000000006 x15: 1fffe0000cf3814d x14: 1fffe0000cf3816b x13: 1fffe0000cf3814a x12: ffff60000d513c81 x11: 1fffe0000d513c80 x10: ffff800087f47940 x9 : ffff0000679c0ab8 x8 : 00000000f3000000 x7 : 1fffe0000cf38157 x6 : 00000000f3f3f3f3 x5 : 00000000f2f2f200 x4 : ffff7000118b2d70 x3 : 0000000000000001 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000679c0000 Call trace: debug_print_object+0x184/0x264 lib/debugobjects.c:514 __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] debug_check_no_obj_freed+0x3b8/0x4f4 lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2078 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x1b8/0x350 mm/slub.c:4390 kvfree+0x3c/0x4c mm/util.c:680 netdev_freemem+0x48/0x60 net/core/dev.c:10797 netdev_release+0x70/0x98 net/core/net-sysfs.c:2031 device_release+0xe4/0x1e8 drivers/base/core.c:2565 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x17c/0x444 lib/kobject.c:737 put_device+0x14/0x24 drivers/base/core.c:3813 free_netdev+0x2b8/0x46c net/core/dev.c:10993 usbnet_disconnect+0x194/0x38c drivers/net/usb/usbnet.c:1636 usb_unbind_interface+0x168/0x6f4 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:568 [inline] device_remove+0x100/0x14c drivers/base/dd.c:560 __device_release_driver drivers/base/dd.c:1270 [inline] device_release_driver_internal+0x310/0x47c drivers/base/dd.c:1293 device_release_driver+0x18/0x24 drivers/base/dd.c:1316 bus_remove_device+0x1a4/0x348 drivers/base/bus.c:574 device_del+0x2e8/0x7d0 drivers/base/core.c:3894 usb_disable_device+0x240/0x5ac drivers/usb/core/message.c:1418 usb_disconnect+0x230/0x760 drivers/usb/core/hub.c:2296 hub_port_connect drivers/usb/core/hub.c:5352 [inline] hub_port_connect_change drivers/usb/core/hub.c:5652 [inline] port_event drivers/usb/core/hub.c:5812 [inline] hub_event+0x10a8/0x365c drivers/usb/core/hub.c:5894 process_one_work+0x78c/0x1898 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x764/0xc24 kernel/workqueue.c:3416 kthread+0x27c/0x300 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 524624 hardirqs last enabled at (524623): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1397 [inline] hardirqs last enabled at (524623): [] finish_lock_switch kernel/sched/core.c:5163 [inline] hardirqs last enabled at (524623): [] finish_task_switch.isra.0+0x1a8/0x8e8 kernel/sched/core.c:5281 hardirqs last disabled at (524624): [] el1_dbg+0x24/0x9c arch/arm64/kernel/entry-common.c:470 softirqs last enabled at (524606): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (524606): [] __do_softirq+0x8d4/0xde8 kernel/softirq.c:583 softirqs last disabled at (524591): [] ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---