usb 2-1: USB disconnect, device number 8
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: 1 PID: 11480 at lib/debugobjects.c:515 debug_print_object+0xc4/0xd8 lib/debugobjects.c:515
ODEBUG: free active (active state 0) object: 84175fcc 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: 1 UID: 0 PID: 11480 Comm: kworker/1:0 Not tainted 6.10.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<81953928>] (dump_backtrace) from [<81953a24>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:826228c4 r5:00000000 r4:8200badc
[<81953a0c>] (show_stack) from [<819716d4>] (__dump_stack lib/dump_stack.c:93 [inline])
[<81953a0c>] (show_stack) from [<819716d4>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:119)
[<81971680>] (dump_stack_lvl) from [<81971714>] (dump_stack+0x18/0x1c lib/dump_stack.c:128)
 r5:00000000 r4:8286bd18
[<819716fc>] (dump_stack) from [<819544cc>] (panic+0x120/0x358 kernel/panic.c:348)
[<819543ac>] (panic) from [<802421dc>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<819543ac>] (panic) from [<802421dc>] (get_taint+0x0/0x1c kernel/panic.c:236)
 r3:8260c5c4 r2:00000001 r1:81ff42e0 r0:81ffc0b8
 r7:80825ec4
[<80242168>] (check_panic_on_warn) from [<80242330>] (__warn+0x7c/0x180 kernel/panic.c:735)
[<802422b4>] (__warn) from [<8024261c>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:768)
 r8:00000009 r7:8205b17c r6:eae55a8c r5:83eb9800 r4:00000000
[<80242438>] (warn_slowpath_fmt) from [<80825ec4>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:515)
 r10:00000005 r9:84175800 r8:81a01c24 r7:82085794 r6:828cf69c r5:eae55b34
 r4:8260cda4
[<80825e00>] (debug_print_object) from [<80827764>] (__debug_check_no_obj_freed lib/debugobjects.c:990 [inline])
[<80825e00>] (debug_print_object) from [<80827764>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1020)
 r8:84176000 r7:84175fcc r6:00000100 r5:00000003 r4:00000000
[<80827510>] (debug_check_no_obj_freed) from [<804bcaf4>] (slab_free_hook mm/slub.c:2219 [inline])
[<80827510>] (debug_check_no_obj_freed) from [<804bcaf4>] (slab_free mm/slub.c:4473 [inline])
[<80827510>] (debug_check_no_obj_freed) from [<804bcaf4>] (kfree+0x198/0x338 mm/slub.c:4594)
 r10:82778754 r9:844b9080 r8:84175800 r7:80461b50 r6:82c023c0 r5:dde8c3c0
 r4:84175800
[<804bc95c>] (kfree) from [<80461b50>] (kvfree+0x2c/0x30 mm/util.c:696)
 r10:82778754 r9:844b9080 r8:84175800 r7:00000000 r6:8491fec0 r5:8480d900
 r4:84175800
[<80461b24>] (kvfree) from [<814bcd4c>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
 r5:8480d900 r4:84175800
[<814bcd20>] (netdev_release) from [<80a6c968>] (device_release+0x38/0xa8 drivers/base/core.c:2581)
 r5:8480d900 r4:84175bc0
[<80a6c930>] (device_release) from [<8192d7b0>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a6c930>] (device_release) from [<8192d7b0>] (kobject_release lib/kobject.c:720 [inline])
[<80a6c930>] (device_release) from [<8192d7b0>] (kref_put include/linux/kref.h:65 [inline])
[<80a6c930>] (device_release) from [<8192d7b0>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b4b6f4 r4:84175bc0
[<8192d6e8>] (kobject_put) from [<80a6cb94>] (put_device+0x18/0x1c drivers/base/core.c:3787)
 r7:844b9800 r6:8417590c r5:84175800 r4:00000000
[<80a6cb7c>] (put_device) from [<81471cdc>] (free_netdev+0x114/0x18c net/core/dev.c:11196)
[<81471bc8>] (free_netdev) from [<80d4e490>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:84175f94 r5:84175e80 r4:00000000
[<80d4e3e4>] (usbnet_disconnect) from [<80db6198>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:844b9830 r6:82778754 r5:00000000 r4:844b9800
[<80db6114>] (usb_unbind_interface) from [<80a74a7c>] (device_remove drivers/base/dd.c:568 [inline])
[<80db6114>] (usb_unbind_interface) from [<80a74a7c>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:00000000 r9:844b9080 r8:00000044 r7:844b9874 r6:82778754 r5:00000000
 r4:844b9830
[<80a74a18>] (device_remove) from [<80a75f94>] (__device_release_driver drivers/base/dd.c:1272 [inline])
[<80a74a18>] (device_remove) from [<80a75f94>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1295)
 r5:00000000 r4:844b9830
[<80a75e08>] (device_release_driver_internal) from [<80a76020>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1318)
 r9:844b9080 r8:82f5ad40 r7:82f5ad38 r6:82f5ad0c r5:844b9830 r4:82f5ad30
[<80a76008>] (device_release_driver) from [<80a74100>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a74034>] (bus_remove_device) from [<80a6e218>] (device_del+0x148/0x38c drivers/base/core.c:3868)
 r9:844b9080 r8:83eb9800 r7:04208060 r6:00000000 r5:844b9830 r4:844b9874
[<80a6e0d0>] (device_del) from [<80db3bb4>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:844b9800 r7:844b9000 r6:8481f288 r5:00000001
 r4:00000038
[<80db3ad8>] (usb_disable_device) from [<80da8a14>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:84a41200 r8:844b90c4 r7:83420800 r6:844b9080 r5:844b9000
 r4:60000013
[<80da8928>] (usb_disconnect) from [<80dab6c4>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80da8928>] (usb_disconnect) from [<80dab6c4>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80da8928>] (usb_disconnect) from [<80dab6c4>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80da8928>] (usb_disconnect) from [<80dab6c4>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:839d1900 r7:844b9000 r6:83420000 r5:83420a10
 r4:00000001
[<80daa84c>] (hub_event) from [<80265f1c>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3231)
 r10:82e6ea05 r9:83eb9800 r8:01800000 r7:ddde4000 r6:82e6ea00 r5:839d1900
 r4:84597c80
[<80265d68>] (process_one_work) from [<80266b00>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80265d68>] (process_one_work) from [<80266b00>] (worker_thread+0x1ec/0x3f4 kernel/workqueue.c:3390)
 r10:83eb9800 r9:84597cac r8:61c88647 r7:ddde4020 r6:82604d40 r5:ddde4000
 r4:84597c80
[<80266914>] (worker_thread) from [<8026fb58>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:dfe2de78 r8:853dd140 r7:84597c80 r6:80266914 r5:83eb9800
 r4:853dd1c0
[<8026fa54>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:134)
Exception stack(0xeae55fb0 to 0xeae55ff8)
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 r5:8026fa54 r4:853dd1c0
Rebooting in 86400 seconds..