usb 2-1: USB disconnect, device number 46
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: 1285 at lib/debugobjects.c:514 debug_print_object+0xc4/0xd8 lib/debugobjects.c:514
ODEBUG: free active (active state 0) object: 847c1fac 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: 1285 Comm: kworker/1:7 Not tainted 6.9.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Workqueue: usb_hub_wq hub_event
Call trace: 
[<818a175c>] (dump_backtrace) from [<818a1858>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622e44 r5:00000000 r4:81fceabc
[<818a1840>] (show_stack) from [<818bef80>] (__dump_stack lib/dump_stack.c:88 [inline])
[<818a1840>] (show_stack) from [<818bef80>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<818bef2c>] (dump_stack_lvl) from [<818befc0>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:8285ad18
[<818befa8>] (dump_stack) from [<818a2300>] (panic+0x120/0x358 kernel/panic.c:348)
[<818a21e0>] (panic) from [<8024390c>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<818a21e0>] (panic) from [<8024390c>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
 r3:8260c584 r2:00000001 r1:81fb7744 r0:81fbf2e8
 r7:8080a120
[<80243898>] (check_panic_on_warn) from [<80243b00>] (__warn+0x7c/0x180 kernel/panic.c:694)
[<80243a84>] (__warn) from [<80243dec>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:727)
 r8:00000009 r7:8201b3cc r6:e04e5a7c r5:836a3000 r4:00000000
[<80243c08>] (warn_slowpath_fmt) from [<8080a120>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:514)
 r10:00000005 r9:847c1800 r8:81a02b44 r7:82043320 r6:828be454 r5:e04e5b24
 r4:8260ce18
[<8080a05c>] (debug_print_object) from [<8080b9b8>] (__debug_check_no_obj_freed lib/debugobjects.c:989 [inline])
[<8080a05c>] (debug_print_object) from [<8080b9b8>] (debug_check_no_obj_freed+0x254/0x2a0 lib/debugobjects.c:1019)
 r8:847c2000 r7:847c1fac r6:00000100 r5:00000003 r4:00000000
[<8080b764>] (debug_check_no_obj_freed) from [<804b2880>] (slab_free_hook mm/slub.c:2078 [inline])
[<8080b764>] (debug_check_no_obj_freed) from [<804b2880>] (slab_free mm/slub.c:4280 [inline])
[<8080b764>] (debug_check_no_obj_freed) from [<804b2880>] (kfree+0x1a0/0x334 mm/slub.c:4390)
 r10:82775a28 r9:85cfd880 r8:847c1800 r7:8045a980 r6:82c023c0 r5:dde9a700
 r4:847c1800
[<804b26e0>] (kfree) from [<8045a980>] (kvfree+0x2c/0x30 mm/util.c:680)
 r10:82775a28 r9:85cfd880 r8:847c1800 r7:00000000 r6:89db5c40 r5:851d2880
 r4:847c1800
[<8045a954>] (kvfree) from [<813db9b4>] (netdev_freemem+0x1c/0x20 net/core/dev.c:10797)
 r5:851d2880 r4:847c1800
[<813db998>] (netdev_freemem) from [<81416a1c>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2031)
[<814169f0>] (netdev_release) from [<80a40530>] (device_release+0x38/0xa8 drivers/base/core.c:2580)
 r5:851d2880 r4:847c1bb8
[<80a404f8>] (device_release) from [<8187b6c0>] (kobject_cleanup lib/kobject.c:689 [inline])
[<80a404f8>] (device_release) from [<8187b6c0>] (kobject_release lib/kobject.c:720 [inline])
[<80a404f8>] (device_release) from [<8187b6c0>] (kref_put include/linux/kref.h:65 [inline])
[<80a404f8>] (device_release) from [<8187b6c0>] (kobject_put+0xc8/0x1f8 lib/kobject.c:737)
 r5:81b489c4 r4:847c1bb8
[<8187b5f8>] (kobject_put) from [<80a407b8>] (put_device+0x18/0x1c drivers/base/core.c:3828)
 r7:85cfcc00 r6:847c190c r5:847c1800 r4:00000000
[<80a407a0>] (put_device) from [<813ccd00>] (free_netdev+0x108/0x188 net/core/dev.c:10993)
[<813ccbf8>] (free_netdev) from [<80d10a98>] (usbnet_disconnect+0xac/0xf0 drivers/net/usb/usbnet.c:1636)
 r6:847c1f74 r5:847c1e60 r4:00000000
[<80d109ec>] (usbnet_disconnect) from [<80d6bb7c>] (usb_unbind_interface+0x84/0x2c4 drivers/usb/core/driver.c:461)
 r8:00000044 r7:85cfcc30 r6:82775a28 r5:00000000 r4:85cfcc00
[<80d6baf8>] (usb_unbind_interface) from [<80a4860c>] (device_remove drivers/base/dd.c:568 [inline])
[<80d6baf8>] (usb_unbind_interface) from [<80a4860c>] (device_remove+0x64/0x6c drivers/base/dd.c:560)
 r10:85cfd880 r9:828eed04 r8:00000044 r7:85cfcc74 r6:82775a28 r5:00000000
 r4:85cfcc30
[<80a485a8>] (device_remove) from [<80a49b24>] (__device_release_driver drivers/base/dd.c:1270 [inline])
[<80a485a8>] (device_remove) from [<80a49b24>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1293)
 r5:00000000 r4:85cfcc30
[<80a49998>] (device_release_driver_internal) from [<80a49bb0>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1316)
 r9:828eed04 r8:82ecef40 r7:82ecef38 r6:82ecef0c r5:85cfcc30 r4:82ecef30
[<80a49b98>] (device_release_driver) from [<80a47cb0>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:574)
[<80a47be4>] (bus_remove_device) from [<80a41d34>] (device_del+0x15c/0x3bc drivers/base/core.c:3909)
 r9:828eed04 r8:85cfcc00 r7:836a3000 r6:85cad308 r5:04208060 r4:85cfcc30
[<80a41bd8>] (device_del) from [<80d695d8>] (usb_disable_device+0xdc/0x1f0 drivers/usb/core/message.c:1418)
 r10:00000000 r9:00000000 r8:85cfcc00 r7:85cfd800 r6:85cad308 r5:00000001
 r4:00000038
[<80d694fc>] (usb_disable_device) from [<80d5e444>] (usb_disconnect+0xec/0x29c drivers/usb/core/hub.c:2305)
 r10:00000001 r9:84ed6200 r8:85cfd8c4 r7:82fb3000 r6:85cfd880 r5:85cfd800
 r4:60000013
[<80d5e358>] (usb_disconnect) from [<80d610f4>] (hub_port_connect drivers/usb/core/hub.c:5361 [inline])
[<80d5e358>] (usb_disconnect) from [<80d610f4>] (hub_port_connect_change drivers/usb/core/hub.c:5661 [inline])
[<80d5e358>] (usb_disconnect) from [<80d610f4>] (port_event drivers/usb/core/hub.c:5821 [inline])
[<80d5e358>] (usb_disconnect) from [<80d610f4>] (hub_event+0xe78/0x194c drivers/usb/core/hub.c:5903)
 r10:00000001 r9:00000100 r8:838ea900 r7:85cfd800 r6:8357b800 r5:82fb3210
 r4:00000001
[<80d6027c>] (hub_event) from [<8026660c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
 r10:82fd2005 r9:836a3000 r8:00000180 r7:ddde40c0 r6:82fd2000 r5:838ea900
 r4:85c85e80
[<80266454>] (process_one_work) from [<80267330>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
[<80266454>] (process_one_work) from [<80267330>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
 r10:836a3000 r9:85c85eac r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
 r4:85c85e80
[<80267144>] (worker_thread) from [<80270044>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:ead0de90 r8:84f67100 r7:85c85e80 r6:80267144 r5:836a3000
 r4:84f67940
[<8026ff40>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
Exception stack(0xe04e5fb0 to 0xe04e5ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026ff40 r4:84f67940
Rebooting in 86400 seconds..