dm9601 1-1:47.0 eth9: register 'dm9601' at usb-dummy_hcd.0-1, Davicom DM96xx USB 10/100 Ethernet, e2:2e:3d:f2:a4:14
usb 1-1: USB disconnect, device number 60
dm9601 1-1:47.0 eth9: unregister 'dm9601' usb-dummy_hcd.0-1, Davicom DM96xx USB 10/100 Ethernet
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3294 at lib/debugobjects.c:612 debug_print_object+0xc4/0xd8 lib/debugobjects.c:612
ODEBUG: free active (active state 0) object: 85fab804 object type: work_struct hint: usbnet_deferred_kevent+0x0/0x38c drivers/net/usb/usbnet.c:1862
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 3294 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:8281f77c r5:00000000 r4:82260bc4
[<80201b08>] (show_stack) from [<8021fbe4>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201b08>] (show_stack) from [<8021fbe4>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<8021fb90>] (dump_stack_lvl) from [<8021fc24>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82a77d18
[<8021fc0c>] (dump_stack) from [<80202624>] (vpanic+0x10c/0x30c kernel/panic.c:430)
[<80202518>] (vpanic) from [<80202858>] (trace_suspend_resume+0x0/0xd8 kernel/panic.c:566)
 r7:808dccc4
[<80202824>] (panic) from [<80254960>] (check_panic_on_warn kernel/panic.c:323 [inline])
[<80202824>] (panic) from [<80254960>] (get_taint+0x0/0x1c kernel/panic.c:318)
 r3:8280c684 r2:00000001 r1:822475e0 r0:8224f05c
[<802548e8>] (check_panic_on_warn) from [<80254ac4>] (__warn+0x80/0x188 kernel/panic.c:837)
[<80254a44>] (__warn) from [<80254db4>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:872)
 r8:00000009 r7:822ba05c r6:dfa5da84 r5:8553ec00 r4:00000000
[<80254bd0>] (warn_slowpath_fmt) from [<808dccc4>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:612)
 r10:00000005 r9:85fab000 r8:81c01e68 r7:822e5630 r6:82ae3d64 r5:dfa5db2c
 r4:8280ccb8
[<808dcc00>] (debug_print_object) from [<808de728>] (__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline])
[<808dcc00>] (debug_print_object) from [<808de728>] (debug_check_no_obj_freed+0x25c/0x2a4 lib/debugobjects.c:1129)
 r8:85fac000 r7:85fab804 r6:00000100 r5:00000003 r4:00000000
[<808de4cc>] (debug_check_no_obj_freed) from [<804ff42c>] (slab_free_hook mm/slub.c:2353 [inline])
[<808de4cc>] (debug_check_no_obj_freed) from [<804ff42c>] (slab_free mm/slub.c:4695 [inline])
[<808de4cc>] (debug_check_no_obj_freed) from [<804ff42c>] (kfree+0x190/0x394 mm/slub.c:4894)
 r10:00000100 r9:8297e2b8 r8:85fab000 r7:805002b8 r6:83002480 r5:dded03a0
 r4:85fab000
[<804ff29c>] (kfree) from [<805002b8>] (kvfree+0x2c/0x30 mm/slub.c:5110)
 r10:00000100 r9:8297e2b8 r8:85fab000 r7:00000000 r6:85f70e40 r5:85958b80
 r4:85fab000
[<8050028c>] (kvfree) from [<815c3140>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2250)
 r5:85958b80 r4:85fab000
[<815c3114>] (netdev_release) from [<80b3d7f8>] (device_release+0x38/0xa8 drivers/base/core.c:2565)
 r5:85958b80 r4:85fab3a0
[<80b3d7c0>] (device_release) from [<81a14210>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80b3d7c0>] (device_release) from [<81a14210>] (kobject_release lib/kobject.c:720 [inline])
[<80b3d7c0>] (device_release) from [<81a14210>] (kref_put include/linux/kref.h:65 [inline])
[<80b3d7c0>] (device_release) from [<81a14210>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737)
 r5:81d4ebec r4:85fab3a0
[<81a14170>] (kobject_put) from [<80b3da44>] (put_device+0x18/0x1c drivers/base/core.c:3797)
 r7:000000c0 r6:00000000 r5:00000000 r4:85fab000
[<80b3da2c>] (put_device) from [<81573688>] (free_netdev+0x190/0x248 net/core/dev.c:12002)
[<815734f8>] (free_netdev) from [<80e32978>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1673)
 r7:85f56400 r6:85fab7d4 r5:85fab6c0 r4:00000000
[<80e328c0>] (usbnet_disconnect) from [<80e9d0e4>] (usb_unbind_interface+0x84/0x2bc drivers/usb/core/driver.c:458)
 r8:85f57888 r7:85f56474 r6:85f56430 r5:00000000 r4:85f57800
[<80e9d060>] (usb_unbind_interface) from [<80b45bc0>] (device_remove drivers/base/dd.c:571 [inline])
[<80e9d060>] (usb_unbind_interface) from [<80b45bc0>] (device_remove+0x64/0x6c drivers/base/dd.c:563)
 r10:00000100 r9:85f57888 r8:00000044 r7:85f56474 r6:8297e2b8 r5:00000000
 r4:85f56430
[<80b45b5c>] (device_remove) from [<80b470b0>] (__device_release_driver drivers/base/dd.c:1274 [inline])
[<80b45b5c>] (device_remove) from [<80b470b0>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1297)
 r5:00000000 r4:85f56430
[<80b46f24>] (device_release_driver_internal) from [<80b4713c>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1320)
 r9:85f57888 r8:833d0d40 r7:833d0d38 r6:833d0d0c r5:85f56430 r4:833d0d30
[<80b47124>] (device_release_driver) from [<80b45200>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:579)
[<80b45134>] (bus_remove_device) from [<80b3f498>] (device_del+0x148/0x38c drivers/base/core.c:3878)
 r9:85f57888 r8:8553ec00 r7:04208060 r6:00000000 r5:85f56430 r4:85f56474
[<80b3f350>] (device_del) from [<80e9ab20>] (usb_disable_device+0xd4/0x1e8 drivers/usb/core/message.c:1418)
 r10:00000100 r9:00000000 r8:00000000 r7:85f56400 r6:85f57800 r5:85a6d7c8
 r4:00000002
[<80e9aa4c>] (usb_disable_device) from [<80e8f8e8>] (usb_disconnect+0xec/0x2ac drivers/usb/core/hub.c:2344)
 r9:84239400 r8:85f578cc r7:8405f000 r6:85f57888 r5:85f57800 r4:60000113
[<80e8f7fc>] (usb_disconnect) from [<80e928e4>] (hub_port_connect drivers/usb/core/hub.c:5406 [inline])
[<80e8f7fc>] (usb_disconnect) from [<80e928e4>] (hub_port_connect_change drivers/usb/core/hub.c:5706 [inline])
[<80e8f7fc>] (usb_disconnect) from [<80e928e4>] (port_event drivers/usb/core/hub.c:5870 [inline])
[<80e8f7fc>] (usb_disconnect) from [<80e928e4>] (hub_event+0x1194/0x1950 drivers/usb/core/hub.c:5952)
 r10:00000100 r9:83d0fd2c r8:8405e800 r7:85f57800 r6:83d0f600 r5:00000001
 r4:00000001
[<80e91750>] (hub_event) from [<8027a398>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3236)
 r10:833d0f70 r9:8326fe05 r8:8553ec00 r7:dddced40 r6:8326fe00 r5:83d0fd2c
 r4:85817000
[<8027a1e4>] (process_one_work) from [<8027afe0>] (process_scheduled_works kernel/workqueue.c:3319 [inline])
[<8027a1e4>] (process_one_work) from [<8027afe0>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3400)
 r10:61c88647 r9:8553ec00 r8:8581702c r7:82804d40 r6:dddced40 r5:dddced60
 r4:85817000
[<8027ade4>] (worker_thread) from [<80281fcc>] (kthread+0x12c/0x280 kernel/kthread.c:463)
 r10:00000000 r9:85817000 r8:8027ade4 r7:df841e60 r6:8547f200 r5:8553ec00
 r4:00000001
[<80281ea0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdfa5dfb0 to 0xdfa5dff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80281ea0
 r4:84992980
Rebooting in 86400 seconds..