usb 1-1: USB disconnect, device number 36 cdc_ncm 1-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.0-1, CDC NCM (NO ZLP) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8321 at lib/debugobjects.c:612 debug_print_object+0xc4/0xd8 lib/debugobjects.c:612 ODEBUG: free active (active state 0) object: 84fb180c object type: work_struct hint: usbnet_deferred_kevent+0x0/0x394 drivers/net/usb/usbnet.c:644 Modules linked in: Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 0 PID: 8321 Comm: kworker/0:36 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Workqueue: usb_hub_wq hub_event Call trace: [<802019e4>] (dump_backtrace) from [<80201ae0>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:828227fc r5:00000000 r4:82257c78 [<80201ac8>] (show_stack) from [<80220020>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201ac8>] (show_stack) from [<80220020>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120) [<8021ffcc>] (dump_stack_lvl) from [<80220060>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000000 r4:82a70d4c [<80220048>] (dump_stack) from [<802025f8>] (panic+0x120/0x374 kernel/panic.c:354) [<802024d8>] (panic) from [<802619e8>] (check_panic_on_warn kernel/panic.c:243 [inline]) [<802024d8>] (panic) from [<802619e8>] (get_taint+0x0/0x1c kernel/panic.c:238) r3:8280c604 r2:00000001 r1:8223e840 r0:82246340 r7:808c8db4 [<80261974>] (check_panic_on_warn) from [<80261b4c>] (__warn+0x80/0x188 kernel/panic.c:749) [<80261acc>] (__warn) from [<80261e3c>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:784) r8:00000009 r7:822af898 r6:e0621a84 r5:84e69800 r4:00000000 [<80261c58>] (warn_slowpath_fmt) from [<808c8db4>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:612) r10:00000005 r9:84fb1000 r8:81c01f84 r7:822da448 r6:82add134 r5:e0621b2c r4:8280cc1c [<808c8cf0>] (debug_print_object) from [<808ca800>] (__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]) [<808c8cf0>] (debug_print_object) from [<808ca800>] (debug_check_no_obj_freed+0x25c/0x2a4 lib/debugobjects.c:1129) r8:84fb2000 r7:84fb180c r6:00000100 r5:00000003 r4:00000000 [<808ca5a4>] (debug_check_no_obj_freed) from [<80505d20>] (slab_free_hook mm/slub.c:2311 [inline]) [<808ca5a4>] (debug_check_no_obj_freed) from [<80505d20>] (slab_free mm/slub.c:4642 [inline]) [<808ca5a4>] (debug_check_no_obj_freed) from [<80505d20>] (kfree+0x190/0x394 mm/slub.c:4841) r10:00000001 r9:8298105c r8:84fb1000 r7:80506bc4 r6:83002480 r5:ddeac4c0 r4:84fb1000 [<80505b90>] (kfree) from [<80506bc4>] (kvfree+0x2c/0x30 mm/slub.c:5055) r10:00000001 r9:8298105c r8:84fb1000 r7:00000000 r6:853f8740 r5:85026480 r4:84fb1000 [<80506b98>] (kvfree) from [<81596e78>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2231) r5:85026480 r4:84fb1000 [<81596e4c>] (netdev_release) from [<80b1f55c>] (device_release+0x38/0xa8 drivers/base/core.c:2568) r5:85026480 r4:84fb13c0 [<80b1f524>] (device_release) from [<81a28ad0>] (kobject_cleanup lib/kobject.c:689 [inline]) [<80b1f524>] (device_release) from [<81a28ad0>] (kobject_release lib/kobject.c:720 [inline]) [<80b1f524>] (device_release) from [<81a28ad0>] (kref_put include/linux/kref.h:65 [inline]) [<80b1f524>] (device_release) from [<81a28ad0>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737) r5:81d4b694 r4:84fb13c0 [<81a28a30>] (kobject_put) from [<80b1f788>] (put_device+0x18/0x1c drivers/base/core.c:3800) r7:000000c0 r6:00000000 r5:00000000 r4:84fb1000 [<80b1f770>] (put_device) from [<81548e8c>] (free_netdev+0x18c/0x244 net/core/dev.c:11793) [<81548d00>] (free_netdev) from [<80e0f870>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1663) r7:84186000 r6:84fb17d4 r5:84fb16c0 r4:00000000 [<80e0f7b8>] (usbnet_disconnect) from [<80e79024>] (usb_unbind_interface+0x84/0x2b4 drivers/usb/core/driver.c:458) r8:84186c88 r7:84186074 r6:84186030 r5:00000000 r4:84186c00 [<80e78fa0>] (usb_unbind_interface) from [<80b27810>] (device_remove drivers/base/dd.c:569 [inline]) [<80e78fa0>] (usb_unbind_interface) from [<80b27810>] (device_remove+0x64/0x6c drivers/base/dd.c:561) r10:00000001 r9:84186c88 r8:00000044 r7:84186074 r6:8298105c r5:00000000 r4:84186030 [<80b277ac>] (device_remove) from [<80b28d00>] (__device_release_driver drivers/base/dd.c:1272 [inline]) [<80b277ac>] (device_remove) from [<80b28d00>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1295) r5:00000000 r4:84186030 [<80b28b74>] (device_release_driver_internal) from [<80b28d8c>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1318) r9:84186c88 r8:83328f40 r7:83328f38 r6:83328f0c r5:84186030 r4:83328f30 [<80b28d74>] (device_release_driver) from [<80b26e64>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:579) [<80b26d98>] (bus_remove_device) from [<80b211c0>] (device_del+0x148/0x38c drivers/base/core.c:3881) r9:84186c88 r8:84e69800 r7:04208060 r6:00000000 r5:84186030 r4:84186074 [<80b21078>] (device_del) from [<80e76a74>] (usb_disable_device+0xd4/0x1e8 drivers/usb/core/message.c:1418) r10:00000001 r9:00000000 r8:00000000 r7:84186000 r6:84186c00 r5:853f4948 r4:00000001 [<80e769a0>] (usb_disable_device) from [<80e6b808>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2316) r9:84dcbc00 r8:84186ccc r7:84158400 r6:84186c88 r5:84186c00 r4:60000013 [<80e6b71c>] (usb_disconnect) from [<80e6e4c8>] (hub_port_connect drivers/usb/core/hub.c:5371 [inline]) [<80e6b71c>] (usb_disconnect) from [<80e6e4c8>] (hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]) [<80e6b71c>] (usb_disconnect) from [<80e6e4c8>] (port_event drivers/usb/core/hub.c:5831 [inline]) [<80e6b71c>] (usb_disconnect) from [<80e6e4c8>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5913) r10:00000001 r9:00000100 r8:83d67300 r7:84186c00 r6:83e1fc00 r5:84158610 r4:00000001 [<80e6d650>] (hub_event) from [<802873bc>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3238) r10:8332d170 r9:83271805 r8:84e69800 r7:dddced80 r6:83271800 r5:83d67300 r4:85644f00 [<80287208>] (process_one_work) from [<80288004>] (process_scheduled_works kernel/workqueue.c:3319 [inline]) [<80287208>] (process_one_work) from [<80288004>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3400) r10:61c88647 r9:84e69800 r8:85644f2c r7:82804d40 r6:dddced80 r5:dddceda0 r4:85644f00 [<80287e08>] (worker_thread) from [<8028f07c>] (kthread+0x12c/0x280 kernel/kthread.c:464) r10:00000000 r9:85644f00 r8:80287e08 r7:e022de60 r6:85644f80 r5:84e69800 r4:00000001 [<8028ef50>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe0621fb0 to 0xe0621ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8028ef50 r4:84d2d280 Rebooting in 86400 seconds..