usb 1-1: USB disconnect, device number 2 cdc_ncm 1-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.0-1, CDC NCM (NO ZLP) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9 at lib/debugobjects.c:612 debug_print_object+0xc4/0xd8 lib/debugobjects.c:612 ODEBUG: free active (active state 0) object: 838a7804 object type: work_struct hint: usbnet_deferred_kevent+0x0/0x38c drivers/net/usb/usbnet.c:1862 Modules linked in: Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Workqueue: usb_hub_wq hub_event Call trace: [<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:8281f77c r5:00000000 r4:82260e74 [<80201b08>] (show_stack) from [<8021fc44>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021fc44>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120) [<8021fbf0>] (dump_stack_lvl) from [<8021fc84>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000000 r4:82a77d18 [<8021fc6c>] (dump_stack) from [<80202624>] (vpanic+0x10c/0x30c kernel/panic.c:430) [<80202518>] (vpanic) from [<80202858>] (trace_suspend_resume+0x0/0xd8 kernel/panic.c:566) r7:808dce44 [<80202824>] (panic) from [<80254960>] (check_panic_on_warn kernel/panic.c:323 [inline]) [<80202824>] (panic) from [<80254960>] (get_taint+0x0/0x1c kernel/panic.c:318) r3:8280c684 r2:00000001 r1:82247874 r0:8224f2f0 [<802548e8>] (check_panic_on_warn) from [<80254ac4>] (__warn+0x80/0x188 kernel/panic.c:837) [<80254a44>] (__warn) from [<80254db4>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:872) r8:00000009 r7:822ba30c r6:df83da84 r5:8320e000 r4:00000000 [<80254bd0>] (warn_slowpath_fmt) from [<808dce44>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:612) r10:00000005 r9:838a7000 r8:81c01e68 r7:822e5944 r6:82ae3d64 r5:df83db2c r4:8280ccb8 [<808dcd80>] (debug_print_object) from [<808de8a8>] (__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]) [<808dcd80>] (debug_print_object) from [<808de8a8>] (debug_check_no_obj_freed+0x25c/0x2a4 lib/debugobjects.c:1129) r8:838a8000 r7:838a7804 r6:00000100 r5:00000003 r4:00000000 [<808de64c>] (debug_check_no_obj_freed) from [<804ff594>] (slab_free_hook mm/slub.c:2353 [inline]) [<808de64c>] (debug_check_no_obj_freed) from [<804ff594>] (slab_free mm/slub.c:4695 [inline]) [<808de64c>] (debug_check_no_obj_freed) from [<804ff594>] (kfree+0x190/0x394 mm/slub.c:4894) r10:00000100 r9:8297eb90 r8:838a7000 r7:80500420 r6:83002480 r5:dde78680 r4:838a7000 [<804ff404>] (kfree) from [<80500420>] (kvfree+0x2c/0x30 mm/slub.c:5110) r10:00000100 r9:8297eb90 r8:838a7000 r7:00000000 r6:858000c0 r5:857fc200 r4:838a7000 [<805003f4>] (kvfree) from [<815c35e0>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2250) r5:857fc200 r4:838a7000 [<815c35b4>] (netdev_release) from [<80b3da48>] (device_release+0x38/0xa8 drivers/base/core.c:2565) r5:857fc200 r4:838a73a0 [<80b3da10>] (device_release) from [<81a147f0>] (kobject_cleanup lib/kobject.c:689 [inline]) [<80b3da10>] (device_release) from [<81a147f0>] (kobject_release lib/kobject.c:720 [inline]) [<80b3da10>] (device_release) from [<81a147f0>] (kref_put include/linux/kref.h:65 [inline]) [<80b3da10>] (device_release) from [<81a147f0>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737) r5:81d4ec1c r4:838a73a0 [<81a14750>] (kobject_put) from [<80b3dc94>] (put_device+0x18/0x1c drivers/base/core.c:3797) r7:000000c0 r6:00000000 r5:00000000 r4:838a7000 [<80b3dc7c>] (put_device) from [<81573b24>] (free_netdev+0x190/0x248 net/core/dev.c:12002) [<81573994>] (free_netdev) from [<80e32b68>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1673) r7:84cd1c00 r6:838a77d4 r5:838a76c0 r4:00000000 [<80e32ab0>] (usbnet_disconnect) from [<80e9d2d4>] (usb_unbind_interface+0x84/0x2bc drivers/usb/core/driver.c:458) r8:84cd3488 r7:84cd1c74 r6:84cd1c30 r5:00000000 r4:84cd3400 [<80e9d250>] (usb_unbind_interface) from [<80b45e10>] (device_remove drivers/base/dd.c:571 [inline]) [<80e9d250>] (usb_unbind_interface) from [<80b45e10>] (device_remove+0x64/0x6c drivers/base/dd.c:563) r10:00000100 r9:84cd3488 r8:00000044 r7:84cd1c74 r6:8297eb90 r5:00000000 r4:84cd1c30 [<80b45dac>] (device_remove) from [<80b47300>] (__device_release_driver drivers/base/dd.c:1274 [inline]) [<80b45dac>] (device_remove) from [<80b47300>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1297) r5:00000000 r4:84cd1c30 [<80b47174>] (device_release_driver_internal) from [<80b4738c>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1320) r9:84cd3488 r8:833b8440 r7:833b8438 r6:833b840c r5:84cd1c30 r4:833b8430 [<80b47374>] (device_release_driver) from [<80b45450>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:579) [<80b45384>] (bus_remove_device) from [<80b3f6e8>] (device_del+0x148/0x38c drivers/base/core.c:3878) r9:84cd3488 r8:8320e000 r7:04208060 r6:00000000 r5:84cd1c30 r4:84cd1c74 [<80b3f5a0>] (device_del) from [<80e9ad10>] (usb_disable_device+0xd4/0x1e8 drivers/usb/core/message.c:1418) r10:00000100 r9:00000000 r8:00000000 r7:84cd1c00 r6:84cd3400 r5:857f0648 r4:00000001 [<80e9ac3c>] (usb_disable_device) from [<80e8fad8>] (usb_disconnect+0xec/0x2ac drivers/usb/core/hub.c:2344) r9:85630c00 r8:84cd34cc r7:83b7a400 r6:84cd3488 r5:84cd3400 r4:600b0113 [<80e8f9ec>] (usb_disconnect) from [<80e92ad4>] (hub_port_connect drivers/usb/core/hub.c:5406 [inline]) [<80e8f9ec>] (usb_disconnect) from [<80e92ad4>] (hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]) [<80e8f9ec>] (usb_disconnect) from [<80e92ad4>] (port_event drivers/usb/core/hub.c:5870 [inline]) [<80e8f9ec>] (usb_disconnect) from [<80e92ad4>] (hub_event+0x1194/0x1950 drivers/usb/core/hub.c:5952) r10:00000100 r9:8411392c r8:83b79c00 r7:84cd3400 r6:84113200 r5:00000001 r4:00000001 [<80e91940>] (hub_event) from [<8027a398>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3236) r10:833b8670 r9:832eb805 r8:8320e000 r7:dddced40 r6:832eb800 r5:8411392c r4:830b9400 [<8027a1e4>] (process_one_work) from [<8027afe0>] (process_scheduled_works kernel/workqueue.c:3319 [inline]) [<8027a1e4>] (process_one_work) from [<8027afe0>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3400) r10:61c88647 r9:8320e000 r8:830b942c r7:82804d40 r6:dddced40 r5:dddced60 r4:830b9400 [<8027ade4>] (worker_thread) from [<80281fcc>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:830b9400 r8:8027ade4 r7:df819e48 r6:830b9480 r5:8320e000 r4:00000001 [<80281ea0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf83dfb0 to 0xdf83dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80281ea0 r4:830b6200 Rebooting in 86400 seconds..