syzbot

cdc_ncm 2-1:1.0 usb0: register 'cdc_ncm' at usb-dummy_hcd.1-1, CDC NCM (NO ZLP), 42:42:42:42:42:42
usb 2-1: USB disconnect, device number 3
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: 86 at lib/debugobjects.c:515 debug_print_object+0xc4/0xd8 lib/debugobjects.c:515
ODEBUG: free active (active state 0) object: 84fa47ac 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 PID: 86 Comm: kworker/1:1 Not tainted 6.10.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<818d8198>] (dump_backtrace) from [<818d8294>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82622804 r5:00000000 r4:81fe1ef0
[<818d827c>] (show_stack) from [<818f5988>] (__dump_stack lib/dump_stack.c:88 [inline])
[<818d827c>] (show_stack) from [<818f5988>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<818f5934>] (dump_stack_lvl) from [<818f59c8>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:82860d18
[<818f59b0>] (dump_stack) from [<818d8d3c>] (panic+0x120/0x358 kernel/panic.c:347)
[<818d8c1c>] (panic) from [<802421ec>] (check_panic_on_warn kernel/panic.c:240 [inline])
[<818d8c1c>] (panic) from [<802421ec>] (print_tainted+0x0/0xa0 kernel/panic.c:235)
 r3:8260c5c4 r2:00000001 r1:81fcafcc r0:81fd26d0
 r7:80827f7c
[<80242178>] (check_panic_on_warn) from [<802423e0>] (__warn+0x7c/0x180 kernel/panic.c:693)
[<80242364>] (__warn) from [<802426cc>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:726)
 r8:00000009 r7:820311e4 r6:df979a7c r5:83665400 r4:00000000
[<802424e8>] (warn_slowpath_fmt) from [<80827f7c>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:515)
 r10:00000005 r9:84fa4000 r8:81a01bf4 r7:8205a370 r6:828c4454 r5:df979b24
 r4:8260cda8
[<80827eb8>] (debug_print_object) from [<8082981c>] (__debug_check_no_obj_freed lib/debugobjects.c:990 [inline])
[<80827eb8>] (debug_print_object) from [<8082981c>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1020)
 r8:84fa4800 r7:84fa47ac r6:00000100 r5:00000003 r4:00000000
[<808295c8>] (debug_check_no_obj_freed) from [<804b9af8>] (slab_free_hook mm/slub.c:2163 [inline])
[<808295c8>] (debug_check_no_obj_freed) from [<804b9af8>] (slab_free mm/slub.c:4438 [inline])
[<808295c8>] (debug_check_no_obj_freed) from [<804b9af8>] (kfree+0x1a0/0x340 mm/slub.c:4559)
 r10:82778be8 r9:844f4480 r8:84fa4000 r7:8045fc30 r6:82c023c0 r5:ddeac280
 r4:84fa4000
[<804b9958>] (kfree) from [<8045fc30>] (kvfree+0x2c/0x30 mm/util.c:680)
 r10:82778be8 r9:844f4480 r8:84fa4000 r7:00000000 r6:84fff100 r5:84e27a80
 r4:84fa4000
[<8045fc04>] (kvfree) from [<8140dcc8>] (netdev_freemem+0x1c/0x20 net/core/dev.c:10903)
 r5:84e27a80 r4:84fa4000
[<8140dcac>] (netdev_freemem) from [<814496a8>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
[<8144967c>] (netdev_release) from [<80a614f4>] (device_release+0x38/0xa8 drivers/base/core.c:2581)
 r5:84e27a80 r4:84fa43b8
[<80a614bc>] (device_release) from [<818b2014>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a614bc>] (device_release) from [<818b2014>] (kobject_release lib/kobject.c:720 [inline])
[<80a614bc>] (device_release) from [<818b2014>] (kref_put include/linux/kref.h:65 [inline])
[<80a614bc>] (device_release) from [<818b2014>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b48be4 r4:84fa43b8
[<818b1f4c>] (kobject_put) from [<80a61720>] (put_device+0x18/0x1c drivers/base/core.c:3787)
 r7:844f4000 r6:84fa410c r5:84fa4000 r4:00000000
[<80a61708>] (put_device) from [<813fee5c>] (free_netdev+0x10c/0x18c net/core/dev.c:11100)
[<813fed50>] (free_netdev) from [<80d36068>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:84fa4774 r5:84fa4660 r4:00000000
[<80d35fbc>] (usbnet_disconnect) from [<80d95150>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:844f4030 r6:82778be8 r5:00000000 r4:844f4000
[<80d950cc>] (usb_unbind_interface) from [<80a695fc>] (device_remove drivers/base/dd.c:568 [inline])
[<80d950cc>] (usb_unbind_interface) from [<80a695fc>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:00000000 r9:844f4480 r8:00000044 r7:844f4074 r6:82778be8 r5:00000000
 r4:844f4030
[<80a69598>] (device_remove) from [<80a6ab14>] (__device_release_driver drivers/base/dd.c:1270 [inline])
[<80a69598>] (device_remove) from [<80a6ab14>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1293)
 r5:00000000 r4:844f4030
[<80a6a988>] (device_release_driver_internal) from [<80a6aba0>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1316)
 r9:844f4480 r8:82cda140 r7:82cda138 r6:82cda10c r5:844f4030 r4:82cda130
[<80a6ab88>] (device_release_driver) from [<80a68c84>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a68bb8>] (bus_remove_device) from [<80a62d9c>] (device_del+0x148/0x38c drivers/base/core.c:3868)
 r9:844f4480 r8:83665400 r7:04208060 r6:00000000 r5:844f4030 r4:844f4074
[<80a62c54>] (device_del) from [<80d92ba8>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:844f4000 r7:844f4400 r6:84ec4188 r5:00000001
 r4:00000038
[<80d92acc>] (usb_disable_device) from [<80d87a08>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:84e71a00 r8:844f44c4 r7:836a8400 r6:844f4480 r5:844f4400
 r4:60000013
[<80d8791c>] (usb_disconnect) from [<80d8a6b8>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80d8791c>] (usb_disconnect) from [<80d8a6b8>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80d8791c>] (usb_disconnect) from [<80d8a6b8>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80d8791c>] (usb_disconnect) from [<80d8a6b8>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:83950100 r7:844f4400 r6:836a7c00 r5:836a8610
 r4:00000001
[<80d89840>] (hub_event) from [<80265b58>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3231)
 r10:82e5c805 r9:83665400 r8:01800000 r7:ddde4080 r6:82e5c800 r5:83950100
 r4:82fa9d00
[<802659a4>] (process_one_work) from [<8026673c>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<802659a4>] (process_one_work) from [<8026673c>] (worker_thread+0x1ec/0x3f4 kernel/workqueue.c:3390)
 r10:83665400 r9:82fa9d2c r8:61c88647 r7:ddde40a0 r6:82604d40 r5:ddde4080
 r4:82fa9d00
[<80266550>] (worker_thread) from [<8026f6c0>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df87de78 r8:834fabc0 r7:82fa9d00 r6:80266550 r5:83665400
 r4:82fd9640
[<8026f5bc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:134)
Exception stack(0xdf979fb0 to 0xdf979ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026f5bc r4:82fd9640
Rebooting in 86400 seconds..