usb 1-1: USB disconnect, device number 37
dm9601 1-1:0.0 eth1: unregister 'dm9601' usb-dummy_hcd.0-1, Davicom DM96xx USB 10/100 Ethernet
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WARNING: CPU: 0 PID: 3673 at lib/debugobjects.c:514 debug_print_object+0xc4/0xd8 lib/debugobjects.c:514
ODEBUG: free active (active state 0) object: 9b945fac 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: 3673 Comm: kworker/0:5 Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Backtrace: 
[<8185d654>] (dump_backtrace) from [<8185d750>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622e84 r5:00000000 r4:81fc02d0
[<8185d738>] (show_stack) from [<8187af40>] (__dump_stack lib/dump_stack.c:88 [inline])
[<8185d738>] (show_stack) from [<8187af40>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<8187aeec>] (dump_stack_lvl) from [<8187af80>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:82851d18
[<8187af68>] (dump_stack) from [<8185e1f8>] (panic+0x120/0x380 kernel/panic.c:344)
[<8185e0d8>] (panic) from [<802438c4>] (check_panic_on_warn kernel/panic.c:237 [inline])
[<8185e0d8>] (panic) from [<802438c4>] (print_tainted+0x0/0xa0 kernel/panic.c:232)
 r3:8260c584 r2:00000001 r1:81fa8744 r0:81fb03e4
 r7:80805398
[<80243850>] (check_panic_on_warn) from [<80243ab8>] (__warn+0x7c/0x180 kernel/panic.c:685)
[<80243a3c>] (__warn) from [<80243da4>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:718)
 r8:00000009 r7:8200c568 r6:dfebda7c r5:83e33000 r4:00000000
[<80243bc0>] (warn_slowpath_fmt) from [<80805398>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:514)
 r10:00000005 r9:9b945800 r8:81a02b44 r7:820342dc r6:828b4754 r5:dfebdb24
 r4:8260ce08
[<808052d4>] (debug_print_object) from [<80806c30>] (__debug_check_no_obj_freed lib/debugobjects.c:989 [inline])
[<808052d4>] (debug_print_object) from [<80806c30>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1019)
 r8:9b946000 r7:9b945fac r6:00000100 r5:00000003 r4:00000000
[<808069dc>] (debug_check_no_obj_freed) from [<804af6b0>] (slab_free_hook mm/slub.c:2078 [inline])
[<808069dc>] (debug_check_no_obj_freed) from [<804af6b0>] (slab_free mm/slub.c:4280 [inline])
[<808069dc>] (debug_check_no_obj_freed) from [<804af6b0>] (kfree+0x1a0/0x334 mm/slub.c:4390)
 r10:84608480 r9:8276f690 r8:9b945800 r7:80459c64 r6:82c023c0 r5:de1d9d00
 r4:9b945800
[<804af510>] (kfree) from [<80459c64>] (kvfree+0x2c/0x30 mm/util.c:680)
 r10:84608480 r9:8276f690 r8:9b945800 r7:00000000 r6:8465fdc0 r5:8461f500
 r4:9b945800
[<80459c38>] (kvfree) from [<8139d72c>] (netdev_freemem+0x1c/0x20 net/core/dev.c:10794)
 r5:8461f500 r4:9b945800
[<8139d710>] (netdev_freemem) from [<813d878c>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
[<813d8760>] (netdev_release) from [<80a385c0>] (device_release+0x38/0xa8 drivers/base/core.c:2499)
 r5:8461f500 r4:9b945bb0
[<80a38588>] (device_release) from [<818375ac>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a38588>] (device_release) from [<818375ac>] (kobject_release lib/kobject.c:720 [inline])
[<80a38588>] (device_release) from [<818375ac>] (kref_put include/linux/kref.h:65 [inline])
[<80a38588>] (device_release) from [<818375ac>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b48404 r4:9b945bb0
[<818374e4>] (kobject_put) from [<80a387ec>] (put_device+0x18/0x1c drivers/base/core.c:3747)
 r7:8460a400 r6:9b945908 r5:9b945800 r4:00000000
[<80a387d4>] (put_device) from [<8138eb20>] (free_netdev+0x108/0x188 net/core/dev.c:10990)
[<8138ea18>] (free_netdev) from [<80d0513c>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:9b945f74 r5:9b945e60 r4:00000000
[<80d05090>] (usbnet_disconnect) from [<80d5ff3c>] (usb_unbind_interface+0x84/0x288 drivers/usb/core/driver.c:461)
 r8:00000001 r7:8460a430 r6:8276f690 r5:00000000 r4:84608480
[<80d5feb8>] (usb_unbind_interface) from [<80a40594>] (device_remove drivers/base/dd.c:569 [inline])
[<80d5feb8>] (usb_unbind_interface) from [<80a40594>] (device_remove+0x64/0x6c drivers/base/dd.c:561)
 r10:84608480 r9:828e5004 r8:00000044 r7:8460a474 r6:8276f690 r5:00000000
 r4:8460a430
[<80a40530>] (device_remove) from [<80a41ae4>] (__device_release_driver drivers/base/dd.c:1272 [inline])
[<80a40530>] (device_remove) from [<80a41ae4>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1295)
 r5:00000000 r4:8460a430
[<80a41958>] (device_release_driver_internal) from [<80a41b70>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1318)
 r9:828e5004 r8:82ed7f40 r7:82ed7f38 r6:82ed7f0c r5:8460a430 r4:82ed7f30
[<80a41b58>] (device_release_driver) from [<80a3fc38>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a3fb6c>] (bus_remove_device) from [<80a39d64>] (device_del+0x158/0x3ac drivers/base/core.c:3828)
 r9:828e5004 r8:04208060 r7:00000000 r6:83e33000 r5:8460a474 r4:8460a430
[<80a39c0c>] (device_del) from [<80d5d9e8>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1416)
 r10:00000000 r9:00000000 r8:8460a400 r7:84608400 r6:846728c8 r5:00000002
 r4:00000070
[<80d5d90c>] (usb_disable_device) from [<80d52880>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2267)
 r10:00000001 r9:840e0200 r8:846084c4 r7:83f4cc00 r6:84608480 r5:84608400
 r4:60000013
[<80d52794>] (usb_disconnect) from [<80d55520>] (hub_port_connect drivers/usb/core/hub.c:5323 [inline])
[<80d52794>] (usb_disconnect) from [<80d55520>] (hub_port_connect_change drivers/usb/core/hub.c:5623 [inline])
[<80d52794>] (usb_disconnect) from [<80d55520>] (port_event drivers/usb/core/hub.c:5783 [inline])
[<80d52794>] (usb_disconnect) from [<80d55520>] (hub_event+0xe6c/0x1940 drivers/usb/core/hub.c:5865)
 r10:00000001 r9:00000100 r8:83dcc900 r7:84608400 r6:83f4c400 r5:83f4ce10
 r4:00000001
[<80d546b4>] (hub_event) from [<80266384>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
 r10:82fd8205 r9:83e33000 r8:00000080 r7:dddcff00 r6:82fd8200 r5:83dcc900
 r4:8cbb7c80
[<802661cc>] (process_one_work) from [<802670a8>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
[<802661cc>] (process_one_work) from [<802670a8>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
 r10:83e33000 r9:8cbb7cac r8:61c88647 r7:dddcff20 r6:82604d40 r5:dddcff00
 r4:8cbb7c80
[<80266ebc>] (worker_thread) from [<8026fdb8>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:df839e90 r8:8cbe4fc0 r7:8cbb7c80 r6:80266ebc r5:83e33000
 r4:8cbe4ec0
[<8026fcb4>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xdfebdfb0 to 0xdfebdff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026fcb4 r4:8cbe4ec0
Rebooting in 86400 seconds..