syzbot

cdc_ncm 2-1:1.0 eth1: 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 eth1: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP)
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WARNING: CPU: 0 PID: 3815 at lib/debugobjects.c:612 debug_print_object+0xc4/0xd8 lib/debugobjects.c:612
ODEBUG: free active (active state 0) object: 846a980c object type: work_struct hint: usbnet_deferred_kevent+0x0/0x394 drivers/net/usb/usbnet.c:633
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 3815 Comm: kworker/0:4 Not tainted 6.12.0-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<819b7fb8>] (dump_backtrace) from [<819b80b4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82623304 r5:00000000 r4:820413b8
[<819b809c>] (show_stack) from [<819d60dc>] (__dump_stack lib/dump_stack.c:94 [inline])
[<819b809c>] (show_stack) from [<819d60dc>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<819d6088>] (dump_stack_lvl) from [<819d611c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82874d18
[<819d6104>] (dump_stack) from [<819b8be0>] (panic+0x120/0x374 kernel/panic.c:354)
[<819b8ac0>] (panic) from [<802426d0>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<819b8ac0>] (panic) from [<802426d0>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8260c604 r2:00000001 r1:82029878 r0:82031344
 r7:80860a74
[<8024265c>] (check_panic_on_warn) from [<80242834>] (__warn+0x80/0x188 kernel/panic.c:748)
[<802427b4>] (__warn) from [<80242b24>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:783)
 r8:00000009 r7:82090ab8 r6:dfecda8c r5:846c3000 r4:00000000
[<80242940>] (warn_slowpath_fmt) from [<80860a74>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:612)
 r10:00000005 r9:846a9000 r8:81a01c34 r7:820baeb4 r6:828e1144 r5:dfecdb34
 r4:8260cdf0
[<808609b0>] (debug_print_object) from [<808624c0>] (__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline])
[<808609b0>] (debug_print_object) from [<808624c0>] (debug_check_no_obj_freed+0x25c/0x2a4 lib/debugobjects.c:1129)
 r8:846aa000 r7:846a980c r6:00000100 r5:00000003 r4:00000000
[<80862264>] (debug_check_no_obj_freed) from [<804d00fc>] (slab_free_hook mm/slub.c:2273 [inline])
[<80862264>] (debug_check_no_obj_freed) from [<804d00fc>] (slab_free mm/slub.c:4579 [inline])
[<80862264>] (debug_check_no_obj_freed) from [<804d00fc>] (kfree+0x190/0x394 mm/slub.c:4727)
 r10:82781654 r9:85092480 r8:846a9000 r7:8047356c r6:82c02480 r5:dde97fa0
 r4:846a9000
[<804cff6c>] (kfree) from [<8047356c>] (kvfree+0x2c/0x30 mm/util.c:701)
 r10:82781654 r9:85092480 r8:846a9000 r7:00000000 r6:8474bd00 r5:84cf3d00
 r4:846a9000
[<80473540>] (kvfree) from [<8150ecc8>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2034)
 r5:84cf3d00 r4:846a9000
[<8150ec9c>] (netdev_release) from [<80aa92d8>] (device_release+0x38/0xa8 drivers/base/core.c:2574)
 r5:84cf3d00 r4:846a93b8
[<80aa92a0>] (device_release) from [<81991e0c>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80aa92a0>] (device_release) from [<81991e0c>] (kobject_release lib/kobject.c:720 [inline])
[<80aa92a0>] (device_release) from [<81991e0c>] (kref_put include/linux/kref.h:65 [inline])
[<80aa92a0>] (device_release) from [<81991e0c>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737)
 r5:81b4bcd4 r4:846a93b8
[<81991d6c>] (kobject_put) from [<80aa9504>] (put_device+0x18/0x1c drivers/base/core.c:3780)
 r7:85092000 r6:00000000 r5:846a9000 r4:00000000
[<80aa94ec>] (put_device) from [<814c0e40>] (free_netdev+0x13c/0x1b4 net/core/dev.c:11372)
[<814c0d04>] (free_netdev) from [<80d92f14>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1652)
 r6:846a97d4 r5:846a96c0 r4:00000000
[<80d92e5c>] (usbnet_disconnect) from [<80dfbda0>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:85092030 r6:82781654 r5:00000000 r4:85092000
[<80dfbd1c>] (usb_unbind_interface) from [<80ab158c>] (device_remove drivers/base/dd.c:569 [inline])
[<80dfbd1c>] (usb_unbind_interface) from [<80ab158c>] (device_remove+0x64/0x6c drivers/base/dd.c:561)
 r10:00000000 r9:85092480 r8:00000044 r7:85092074 r6:82781654 r5:00000000
 r4:85092030
[<80ab1528>] (device_remove) from [<80ab2a78>] (__device_release_driver drivers/base/dd.c:1273 [inline])
[<80ab1528>] (device_remove) from [<80ab2a78>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1296)
 r5:00000000 r4:85092030
[<80ab28ec>] (device_release_driver_internal) from [<80ab2b04>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1319)
 r9:85092480 r8:82fd4340 r7:82fd4338 r6:82fd430c r5:85092030 r4:82fd4330
[<80ab2aec>] (device_release_driver) from [<80ab0bec>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:576)
[<80ab0b20>] (bus_remove_device) from [<80aaaf34>] (device_del+0x148/0x38c drivers/base/core.c:3861)
 r9:85092480 r8:846c3000 r7:04208060 r6:00000000 r5:85092030 r4:85092074
[<80aaadec>] (device_del) from [<80df97bc>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:85092000 r7:85092400 r6:85157508 r5:00000001
 r4:00000038
[<80df96e0>] (usb_disable_device) from [<80dee620>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:84e20a00 r8:850924c4 r7:83d8ac00 r6:85092480 r5:85092400
 r4:60000113
[<80dee534>] (usb_disconnect) from [<80df12d0>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80dee534>] (usb_disconnect) from [<80df12d0>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80dee534>] (usb_disconnect) from [<80df12d0>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80dee534>] (usb_disconnect) from [<80df12d0>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:838dd500 r7:85092400 r6:83d8a400 r5:83d8ae10
 r4:00000001
[<80df0458>] (hub_event) from [<80266e90>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3229)
 r10:82e6d405 r9:846c3000 r8:00800000 r7:dddcfe40 r6:82e6d400 r5:838dd500
 r4:8519b980
[<80266cdc>] (process_one_work) from [<80267a74>] (process_scheduled_works kernel/workqueue.c:3310 [inline])
[<80266cdc>] (process_one_work) from [<80267a74>] (worker_thread+0x1ec/0x3bc kernel/workqueue.c:3391)
 r10:846c3000 r9:8519b9ac r8:61c88647 r7:dddcfe60 r6:82604d40 r5:dddcfe40
 r4:8519b980
[<80267888>] (worker_thread) from [<80270ae0>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df839e78 r8:85156480 r7:8519b980 r6:80267888 r5:846c3000
 r4:844f6380
[<802709dc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdfecdfb0 to 0xdfecdff8)
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 r5:802709dc r4:844f6380
Rebooting in 86400 seconds..