------------[ cut here ]------------
WARNING: CPU: 1 PID: 4431 at lib/debugobjects.c:515 debug_print_object+0xc4/0xd8 lib/debugobjects.c:515
ODEBUG: free active (active state 0) object: 84df4fcc 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: 4431 Comm: kworker/1:12 Not tainted 6.11.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<8195d0a0>] (dump_backtrace) from [<8195d19c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:826228c4 r5:00000000 r4:8200ca8c
[<8195d184>] (show_stack) from [<8197aec0>] (__dump_stack lib/dump_stack.c:93 [inline])
[<8195d184>] (show_stack) from [<8197aec0>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:119)
[<8197ae6c>] (dump_stack_lvl) from [<8197af00>] (dump_stack+0x18/0x1c lib/dump_stack.c:128)
 r5:00000000 r4:8286dd18
[<8197aee8>] (dump_stack) from [<8195dc44>] (panic+0x120/0x368 kernel/panic.c:354)
[<8195db24>] (panic) from [<802421e4>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<8195db24>] (panic) from [<802421e4>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8260c5c4 r2:00000001 r1:81ff52b0 r0:81ffd088
 r7:8082dc54
[<80242170>] (check_panic_on_warn) from [<80242338>] (__warn+0x7c/0x180 kernel/panic.c:741)
[<802422bc>] (__warn) from [<80242624>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:774)
 r8:00000009 r7:8205bd50 r6:dfabda8c r5:8340c800 r4:00000000
[<80242440>] (warn_slowpath_fmt) from [<8082dc54>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:515)
 r10:00000005 r9:84df4800 r8:81a01c24 r7:820862f8 r6:828d171c r5:dfabdb34
 r4:8260cda4
[<8082db90>] (debug_print_object) from [<8082f4f4>] (__debug_check_no_obj_freed lib/debugobjects.c:990 [inline])
[<8082db90>] (debug_print_object) from [<8082f4f4>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1020)
 r8:84df5000 r7:84df4fcc r6:00000100 r5:00000003 r4:00000000
[<8082f2a0>] (debug_check_no_obj_freed) from [<804bc95c>] (slab_free_hook mm/slub.c:2219 [inline])
[<8082f2a0>] (debug_check_no_obj_freed) from [<804bc95c>] (slab_free mm/slub.c:4473 [inline])
[<8082f2a0>] (debug_check_no_obj_freed) from [<804bc95c>] (kfree+0x198/0x338 mm/slub.c:4594)
 r10:82779398 r9:84e9c480 r8:84df4800 r7:804617e0 r6:82c023c0 r5:ddea85c0
 r4:84df4800
[<804bc7c4>] (kfree) from [<804617e0>] (kvfree+0x2c/0x30 mm/util.c:696)
 r10:82779398 r9:84e9c480 r8:84df4800 r7:00000000 r6:849b2b80 r5:850ce680
 r4:84df4800
[<804617b4>] (kvfree) from [<814c5c14>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
 r5:850ce680 r4:84df4800
[<814c5be8>] (netdev_release) from [<80a749d0>] (device_release+0x38/0xa8 drivers/base/core.c:2582)
 r5:850ce680 r4:84df4bc0
[<80a74998>] (device_release) from [<81936ee8>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a74998>] (device_release) from [<81936ee8>] (kobject_release lib/kobject.c:720 [inline])
[<80a74998>] (device_release) from [<81936ee8>] (kref_put include/linux/kref.h:65 [inline])
[<80a74998>] (device_release) from [<81936ee8>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737)
 r5:81b4b7cc r4:84df4bc0
[<81936e48>] (kobject_put) from [<80a74bfc>] (put_device+0x18/0x1c drivers/base/core.c:3790)
 r7:84e9e800 r6:84df490c r5:84df4800 r4:00000000
[<80a74be4>] (put_device) from [<8147ab4c>] (free_netdev+0x114/0x18c net/core/dev.c:11205)
[<8147aa38>] (free_netdev) from [<80d56938>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:84df4f94 r5:84df4e80 r4:00000000
[<80d5688c>] (usbnet_disconnect) from [<80dbe598>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:84e9e830 r6:82779398 r5:00000000 r4:84e9e800
[<80dbe514>] (usb_unbind_interface) from [<80a7cad4>] (device_remove drivers/base/dd.c:568 [inline])
[<80dbe514>] (usb_unbind_interface) from [<80a7cad4>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:00000000 r9:84e9c480 r8:00000044 r7:84e9e874 r6:82779398 r5:00000000
 r4:84e9e830
[<80a7ca70>] (device_remove) from [<80a7dfec>] (__device_release_driver drivers/base/dd.c:1272 [inline])
[<80a7ca70>] (device_remove) from [<80a7dfec>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1295)
 r5:00000000 r4:84e9e830
[<80a7de60>] (device_release_driver_internal) from [<80a7e078>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1318)
 r9:84e9c480 r8:83448040 r7:83448038 r6:8344800c r5:84e9e830 r4:83448030
[<80a7e060>] (device_release_driver) from [<80a7c158>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a7c08c>] (bus_remove_device) from [<80a76268>] (device_del+0x148/0x38c drivers/base/core.c:3871)
 r9:84e9c480 r8:8340c800 r7:04208060 r6:00000000 r5:84e9e830 r4:84e9e874
[<80a76120>] (device_del) from [<80dbbfb4>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:84e9e800 r7:84e9c400 r6:8549cf08 r5:84e9c400
 r4:60000113
[<80dbbed8>] (usb_disable_device) from [<80db0e18>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2304)
 r10:00000001 r9:82f8e000 r8:84e9c4c4 r7:83e61000 r6:84e9c480 r5:84e9c400
 r4:60000113
[<80db0d2c>] (usb_disconnect) from [<80db3ac8>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80db0d2c>] (usb_disconnect) from [<80db3ac8>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80db0d2c>] (usb_disconnect) from [<80db3ac8>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80db0d2c>] (usb_disconnect) from [<80db3ac8>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:83e0a500 r7:84e9c400 r6:83e60800 r5:83e61210
 r4:00000001
[<80db2c50>] (hub_event) from [<80265f08>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3231)
 r10:82fd8605 r9:8340c800 r8:01800000 r7:ddde4000 r6:82fd8600 r5:83e0a500
 r4:850c0480
[<80265d54>] (process_one_work) from [<80266aec>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80265d54>] (process_one_work) from [<80266aec>] (worker_thread+0x1ec/0x3b4 kernel/workqueue.c:3389)
 r10:8340c800 r9:850c04ac r8:61c88647 r7:ddde4020 r6:82604d40 r5:ddde4000
 r4:850c0480
[<80266900>] (worker_thread) from [<8026fb04>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:dfca9e78 r8:84fed140 r7:850c0480 r6:80266900 r5:8340c800
 r4:85425a00
[<8026fa00>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdfabdfb0 to 0xdfabdff8)
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 r5:8026fa00 r4:85425a00
Rebooting in 86400 seconds..