usb 2-1: USB disconnect, device number 5 cdc_ncm 2-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.1-1, CDC NCM (NO ZLP) ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1801 at lib/debugobjects.c:612 debug_print_object+0xc4/0xd8 lib/debugobjects.c:612 ODEBUG: free active (active state 0) object: 84e80804 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: 1 UID: 0 PID: 1801 Comm: kworker/1:3 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 r4:82260d54 [<80201b08>] (show_stack) from [<8021fc50>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021fc50>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120) [<8021fbfc>] (dump_stack_lvl) from [<8021fc90>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000000 r4:82a77d18 [<8021fc78>] (dump_stack) from [<80202624>] (vpanic+0x10c/0x30c kernel/panic.c:430) [<80202518>] (vpanic) from [<80202858>] (trace_suspend_resume+0x0/0xd8 kernel/panic.c:566) r7:808dcec4 [<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 r1:82247754 r0:8224f1d0 [<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 r7:822ba1ec r6:eaf09a84 r5:83a94800 r4:00000000 [<80254bd0>] (warn_slowpath_fmt) from [<808dcec4>] (debug_print_object+0xc4/0xd8 lib/debugobjects.c:612) r10:00000005 r9:84e80000 r8:81c01e68 r7:822e57c0 r6:82ae3d64 r5:eaf09b2c r4:8280ccb8 [<808dce00>] (debug_print_object) from [<808de928>] (__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]) [<808dce00>] (debug_print_object) from [<808de928>] (debug_check_no_obj_freed+0x25c/0x2a4 lib/debugobjects.c:1129) r8:84e81000 r7:84e80804 r6:00000100 r5:00000003 r4:00000000 [<808de6cc>] (debug_check_no_obj_freed) from [<804ff594>] (slab_free_hook mm/slub.c:2353 [inline]) [<808de6cc>] (debug_check_no_obj_freed) from [<804ff594>] (slab_free mm/slub.c:4695 [inline]) [<808de6cc>] (debug_check_no_obj_freed) from [<804ff594>] (kfree+0x190/0x394 mm/slub.c:4894) r10:00000100 r9:8297eb90 r8:84e80000 r7:80500420 r6:83002480 r5:ddea9a00 r4:84e80000 [<804ff404>] (kfree) from [<80500420>] (kvfree+0x2c/0x30 mm/slub.c:5110) r10:00000100 r9:8297eb90 r8:84e80000 r7:00000000 r6:85972ec0 r5:8596a000 r4:84e80000 [<805003f4>] (kvfree) from [<815c34c8>] (netdev_release+0x2c/0x34 net/core/net-sysfs.c:2250) r5:8596a000 r4:84e80000 [<815c349c>] (netdev_release) from [<80b3d9d8>] (device_release+0x38/0xa8 drivers/base/core.c:2565) r5:8596a000 r4:84e803a0 [<80b3d9a0>] (device_release) from [<81a146d0>] (kobject_cleanup lib/kobject.c:689 [inline]) [<80b3d9a0>] (device_release) from [<81a146d0>] (kobject_release lib/kobject.c:720 [inline]) [<80b3d9a0>] (device_release) from [<81a146d0>] (kref_put include/linux/kref.h:65 [inline]) [<80b3d9a0>] (device_release) from [<81a146d0>] (kobject_put+0xa0/0x1f4 lib/kobject.c:737) r5:81d4ebec r4:84e803a0 [<81a14630>] (kobject_put) from [<80b3dc24>] (put_device+0x18/0x1c drivers/base/core.c:3797) r7:000000c0 r6:00000000 r5:00000000 r4:84e80000 [<80b3dc0c>] (put_device) from [<81573a0c>] (free_netdev+0x190/0x248 net/core/dev.c:12002) [<8157387c>] (free_netdev) from [<80e32af8>] (usbnet_disconnect+0xb8/0xfc drivers/net/usb/usbnet.c:1673) r7:8597d000 r6:84e807d4 r5:84e806c0 r4:00000000 [<80e32a40>] (usbnet_disconnect) from [<80e9d264>] (usb_unbind_interface+0x84/0x2bc drivers/usb/core/driver.c:458) r8:8597d888 r7:8597d074 r6:8597d030 r5:00000000 r4:8597d800 [<80e9d1e0>] (usb_unbind_interface) from [<80b45da0>] (device_remove drivers/base/dd.c:571 [inline]) [<80e9d1e0>] (usb_unbind_interface) from [<80b45da0>] (device_remove+0x64/0x6c drivers/base/dd.c:563) r10:00000100 r9:8597d888 r8:00000044 r7:8597d074 r6:8297eb90 r5:00000000 r4:8597d030 [<80b45d3c>] (device_remove) from [<80b47290>] (__device_release_driver drivers/base/dd.c:1274 [inline]) [<80b45d3c>] (device_remove) from [<80b47290>] (device_release_driver_internal+0x18c/0x200 drivers/base/dd.c:1297) r5:00000000 r4:8597d030 [<80b47104>] (device_release_driver_internal) from [<80b4731c>] (device_release_driver+0x18/0x1c drivers/base/dd.c:1320) r9:8597d888 r8:8335cf40 r7:8335cf38 r6:8335cf0c r5:8597d030 r4:8335cf30 [<80b47304>] (device_release_driver) from [<80b453e0>] (bus_remove_device+0xcc/0x120 drivers/base/bus.c:579) [<80b45314>] (bus_remove_device) from [<80b3f678>] (device_del+0x148/0x38c drivers/base/core.c:3878) r9:8597d888 r8:83a94800 r7:04208060 r6:00000000 r5:8597d030 r4:8597d074 [<80b3f530>] (device_del) from [<80e9aca0>] (usb_disable_device+0xd4/0x1e8 drivers/usb/core/message.c:1418) r10:00000100 r9:00000000 r8:00000000 r7:8597d000 r6:8597d800 r5:85972288 r4:00000001 [<80e9abcc>] (usb_disable_device) from [<80e8fa68>] (usb_disconnect+0xec/0x2ac drivers/usb/core/hub.c:2344) r9:84990600 r8:8597d8cc r7:840e6000 r6:8597d888 r5:8597d800 r4:60030113 [<80e8f97c>] (usb_disconnect) from [<80e92a64>] (hub_port_connect drivers/usb/core/hub.c:5406 [inline]) [<80e8f97c>] (usb_disconnect) from [<80e92a64>] (hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]) [<80e8f97c>] (usb_disconnect) from [<80e92a64>] (port_event drivers/usb/core/hub.c:5870 [inline]) [<80e8f97c>] (usb_disconnect) from [<80e92a64>] (hub_event+0x1194/0x1950 drivers/usb/core/hub.c:5952) r10:00000100 r9:83c5fb2c r8:840e5800 r7:8597d800 r6:83c5f400 r5:00000001 r4:00000001 [<80e918d0>] (hub_event) from [<8027a398>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3236) r10:83362170 r9:83274805 r8:83a94800 r7:ddde2d40 r6:83274800 r5:83c5fb2c r4:846c2200 [<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 r9:83a94800 r8:846c222c r7:82804d40 r6:ddde2d40 r5:ddde2d60 r4:846c2200 [<8027ade4>] (worker_thread) from [<80281fcc>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:846c2200 r8:8027ade4 r7:df961e60 r6:846c2280 r5:83a94800 r4:00000001 [<80281ea0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeaf09fb0 to 0xeaf09ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80281ea0 r4:846bed40 Rebooting in 86400 seconds..