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: 00000000cac7eca7 object type: work_struct hint: usbnet_deferred_kevent+0x0/0xa74 drivers/net/usb/usbnet.c:658 WARNING: CPU: 0 PID: 7670 at lib/debugobjects.c:514 debug_print_object+0x184/0x264 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 7670 Comm: kworker/0:1 Not tainted 6.8.0-syzkaller-05292-gb0546776ad3f #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 : ffff80008e4c70a0 x29: ffff80008e4c70a0 x28: dfff800000000000 x27: 0000000000000004 x26: ffff8000801bff8c x25: ffff80008e4c7228 x24: ffff80008516e900 x23: 0000000000000003 x22: ffff80008668fc20 x21: ffff800084eb3a40 x20: ffff80008516e100 x19: ffff80008e4c7210 x18: ffff00000f94e470 x17: 626f203761636537 x16: 0000000000000006 x15: 1fffe00001f29c8d x14: 1fffe00001f29cab x13: 1fffe00001f29c8a x12: ffff60000d50e7bb x11: 1fffe0000d50e7ba x10: ffff60000d50e7ba x9 : dfff800000000000 x8 : 00009ffff2af1846 x7 : ffff00006a873dd3 x6 : 0000000000000001 x5 : ffff00006a873dd0 x4 : 1fffe00001f29b41 x3 : dfff800000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00000f94da00 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+0x1b4/0x328 mm/slub.c:4390 kvfree+0x3c/0x4c mm/util.c:680 netdev_freemem+0x48/0x60 net/core/dev.c:10794 netdev_release+0x70/0x98 net/core/net-sysfs.c:2031 device_release+0xe4/0x1e8 drivers/base/core.c:2499 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:3747 free_netdev+0x2b8/0x46c net/core/dev.c:10990 usbnet_disconnect+0x194/0x38c drivers/net/usb/usbnet.c:1636 usb_unbind_interface+0x160/0x670 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:569 [inline] device_remove+0x100/0x14c drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x310/0x47c drivers/base/dd.c:1295 device_release_driver+0x18/0x24 drivers/base/dd.c:1318 bus_remove_device+0x1a4/0x348 drivers/base/bus.c:574 device_del+0x2e8/0x804 drivers/base/core.c:3828 usb_disable_device+0x240/0x5ac drivers/usb/core/message.c:1416 usb_disconnect+0x22c/0x75c drivers/usb/core/hub.c:2267 hub_port_connect drivers/usb/core/hub.c:5323 [inline] hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] port_event drivers/usb/core/hub.c:5783 [inline] hub_event+0x10a4/0x364c drivers/usb/core/hub.c:5865 process_one_work+0x78c/0x1848 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: 922922 hardirqs last enabled at (922921): [] __up_console_sem kernel/printk/printk.c:341 [inline] hardirqs last enabled at (922921): [] __console_unlock kernel/printk/printk.c:2725 [inline] hardirqs last enabled at (922921): [] console_unlock+0x1c0/0x1d8 kernel/printk/printk.c:3044 hardirqs last disabled at (922922): [] el1_dbg+0x24/0x9c arch/arm64/kernel/entry-common.c:436 softirqs last enabled at (922894): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (922894): [] __do_softirq+0x888/0xd9c kernel/softirq.c:583 softirqs last disabled at (922865): [] ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]---