usb 2-1: USB disconnect, device number 27
cdc_ncm 2-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP)
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WARNING: CPU: 0 PID: 10521 at lib/debugobjects.c:514 debug_print_object+0xc4/0xd8 lib/debugobjects.c:514
ODEBUG: free active (active state 0) object: 84e71fac object type: work_struct hint: usbnet_deferred_kevent+0x0/0x388 drivers/net/usb/usbnet.c:630
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 10521 Comm: kworker/0:5 Not tainted 6.9.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<818d5778>] (dump_backtrace) from [<818d5874>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82622d44 r5:00000000 r4:81fe1590
[<818d585c>] (show_stack) from [<818f2e84>] (__dump_stack lib/dump_stack.c:88 [inline])
[<818d585c>] (show_stack) from [<818f2e84>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<818f2e30>] (dump_stack_lvl) from [<818f2ec4>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:8285fd18
[<818f2eac>] (dump_stack) from [<818d631c>] (panic+0x120/0x358 kernel/panic.c:347)
[<818d61fc>] (panic) from [<80243dcc>] (check_panic_on_warn kernel/panic.c:240 [inline])
[<818d61fc>] (panic) from [<80243dcc>] (print_tainted+0x0/0xa0 kernel/panic.c:235)
 r3:8260c5c4 r2:00000001 r1:81fca208 r0:81fd1e58
 r7:808271ec
[<80243d58>] (check_panic_on_warn) from [<80243fc0>] (__warn+0x7c/0x180 kernel/panic.c:693)
[<80243f44>] (__warn) from [<802442ac>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:726)
 r8:00000009 r7:8202ff38 r6:df885a7c r5:83d9d400 r4:00000000
[<802440c8>] (warn_slowpath_fmt) from [<808271ec>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:514)
 r10:00000005 r9:84e71800 r8:81a02b44 r7:820592fc r6:828c369c r5:df885b24
 r4:8260cda8
[<80827128>] (debug_print_object) from [<80828a8c>] (__debug_check_no_obj_freed lib/debugobjects.c:989 [inline])
[<80827128>] (debug_print_object) from [<80828a8c>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1019)
 r8:84e72000 r7:84e71fac r6:00000100 r5:00000003 r4:00000000
[<80828838>] (debug_check_no_obj_freed) from [<804bb274>] (slab_free_hook mm/slub.c:2162 [inline])
[<80828838>] (debug_check_no_obj_freed) from [<804bb274>] (slab_free mm/slub.c:4436 [inline])
[<80828838>] (debug_check_no_obj_freed) from [<804bb274>] (kfree+0x1a0/0x340 mm/slub.c:4557)
 r10:82778d48 r9:84ed7880 r8:84e71800 r7:80461618 r6:82c023c0 r5:ddea97c0
 r4:84e71800
[<804bb0d4>] (kfree) from [<80461618>] (kvfree+0x2c/0x30 mm/util.c:680)
 r10:82778d48 r9:84ed7880 r8:84e71800 r7:00000000 r6:84783b80 r5:84e9ca80
 r4:84e71800
[<804615ec>] (kvfree) from [<8140b614>] (netdev_freemem+0x1c/0x20 net/core/dev.c:10902)
 r5:84e9ca80 r4:84e71800
[<8140b5f8>] (netdev_freemem) from [<81446edc>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
[<81446eb0>] (netdev_release) from [<80a62284>] (device_release+0x38/0xa8 drivers/base/core.c:2581)
 r5:84e9ca80 r4:84e71bb8
[<80a6224c>] (device_release) from [<818af5f4>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a6224c>] (device_release) from [<818af5f4>] (kobject_release lib/kobject.c:720 [inline])
[<80a6224c>] (device_release) from [<818af5f4>] (kref_put include/linux/kref.h:65 [inline])
[<80a6224c>] (device_release) from [<818af5f4>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b4981c r4:84e71bb8
[<818af52c>] (kobject_put) from [<80a624b0>] (put_device+0x18/0x1c drivers/base/core.c:3829)
 r7:84ed7000 r6:84e7190c r5:84e71800 r4:00000000
[<80a62498>] (put_device) from [<813fc7a8>] (free_netdev+0x10c/0x18c net/core/dev.c:11099)
[<813fc69c>] (free_netdev) from [<80d35a48>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:84e71f74 r5:84e71e60 r4:00000000
[<80d3599c>] (usbnet_disconnect) from [<80d94848>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:84ed7030 r6:82778d48 r5:00000000 r4:84ed7000
[<80d947c4>] (usb_unbind_interface) from [<80a6a374>] (device_remove drivers/base/dd.c:568 [inline])
[<80d947c4>] (usb_unbind_interface) from [<80a6a374>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:00000000 r9:84ed7880 r8:00000044 r7:84ed7074 r6:82778d48 r5:00000000
 r4:84ed7030
[<80a6a310>] (device_remove) from [<80a6b88c>] (__device_release_driver drivers/base/dd.c:1270 [inline])
[<80a6a310>] (device_remove) from [<80a6b88c>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1293)
 r5:00000000 r4:84ed7030
[<80a6b700>] (device_release_driver_internal) from [<80a6b918>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1316)
 r9:84ed7880 r8:82ed0f40 r7:82ed0f38 r6:82ed0f0c r5:84ed7030 r4:82ed0f30
[<80a6b900>] (device_release_driver) from [<80a699fc>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a69930>] (bus_remove_device) from [<80a63b14>] (device_del+0x148/0x38c drivers/base/core.c:3910)
 r9:84ed7880 r8:83d9d400 r7:04208060 r6:00000000 r5:84ed7030 r4:84ed7074
[<80a639cc>] (device_del) from [<80d922a0>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:84ed7000 r7:84ed7800 r6:82f24548 r5:00000001
 r4:00000038
[<80d921c4>] (usb_disable_device) from [<80d87100>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:838c6800 r8:84ed78c4 r7:83ec5c00 r6:84ed7880 r5:84ed7800
 r4:60000013
[<80d87014>] (usb_disconnect) from [<80d89db0>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80d87014>] (usb_disconnect) from [<80d89db0>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80d87014>] (usb_disconnect) from [<80d89db0>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80d87014>] (usb_disconnect) from [<80d89db0>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:83b51500 r7:84ed7800 r6:83ec5400 r5:83ec5e10
 r4:00000001
[<80d88f38>] (hub_event) from [<802671bc>] (process_one_work+0x1c4/0x510 kernel/workqueue.c:3231)
 r10:82f94205 r9:83d9d400 r8:00800000 r7:dddd00c0 r6:82f94200 r5:83b51500
 r4:84cf2600
[<80266ff8>] (process_one_work) from [<80267df0>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80266ff8>] (process_one_work) from [<80267df0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3393)
 r10:83d9d400 r9:84cf262c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
 r4:84cf2600
[<80267c04>] (worker_thread) from [<80271228>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:dfad9e90 r8:84ea6100 r7:84cf2600 r6:80267c04 r5:83d9d400
 r4:8587c300
[<80271124>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:134)
Exception stack(0xdf885fb0 to 0xdf885ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271124 r4:8587c300
Rebooting in 86400 seconds..