INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.063798][ T21] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 49.303608][ T21] usb 1-1: Using ep0 maxpacket: 8 [ 49.423659][ T21] usb 1-1: config 0 has an invalid interface number: 235 but max is 0 [ 49.431987][ T21] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 49.442578][ T21] usb 1-1: config 0 has no interface number 0 [ 49.448772][ T21] usb 1-1: config 0 interface 235 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 0 [ 49.459202][ T21] usb 1-1: New USB device found, idVendor=1618, idProduct=9113, bcdDevice=19.d3 [ 49.468947][ T21] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 49.479038][ T21] usb 1-1: config 0 descriptor?? [ 49.525784][ T21] rsi_91x: rsi_probe: Initialized os intf ops executing program [ 49.923692][ T21] rsi_91x: rsi_usb_reg_read: Reg read failed with error code :-71 [ 49.932182][ T21] rsi_91x: rsi_hal_prepare_fwload: REGOUT read failed [ 49.941936][ T21] rsi_91x: rsi_probe: Failed in device init [ 49.949541][ T21] ------------[ cut here ]------------ [ 49.956712][ T21] ODEBUG: free active (active state 0) object type: timer_list hint: bl_cmd_timeout+0x0/0x40 [ 49.967393][ T21] WARNING: CPU: 1 PID: 21 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 [ 49.977060][ T21] Kernel panic - not syncing: panic_on_warn set ... [ 49.983789][ T21] CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13 [ 49.991705][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.002142][ T21] Workqueue: usb_hub_wq hub_event [ 50.007330][ T21] Call Trace: [ 50.010629][ T21] dump_stack+0xca/0x13e [ 50.014883][ T21] ? debug_print_object+0xe0/0x250 [ 50.020552][ T21] panic+0x292/0x6c9 [ 50.024700][ T21] ? __warn_printk+0xf3/0xf3 [ 50.029544][ T21] ? debug_print_object+0x160/0x250 [ 50.035000][ T21] ? __probe_kernel_read+0x16c/0x1b0 [ 50.040416][ T21] ? __warn.cold+0x5/0x4b [ 50.044735][ T21] ? __warn+0xe4/0x1c0 [ 50.048914][ T21] ? debug_print_object+0x160/0x250 [ 50.054262][ T21] __warn.cold+0x20/0x4b [ 50.058991][ T21] ? debug_print_object+0x160/0x250 [ 50.064511][ T21] report_bug+0x262/0x2a0 [ 50.068925][ T21] do_error_trap+0x12b/0x1e0 [ 50.073717][ T21] ? debug_print_object+0x160/0x250 [ 50.079040][ T21] do_invalid_op+0x32/0x40 [ 50.083667][ T21] ? debug_print_object+0x160/0x250 [ 50.088996][ T21] invalid_op+0x14/0x20 [ 50.093181][ T21] RIP: 0010:debug_print_object+0x160/0x250 [ 50.099524][ T21] Code: dd e0 16 da 85 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd e0 16 da 85 48 c7 c7 c0 0c da 85 e8 db c7 33 ff <0f> 0b 83 05 43 3c ce 05 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 50.119711][ T21] RSP: 0018:ffff8881d9eff0b8 EFLAGS: 00010082 [ 50.126475][ T21] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 50.134445][ T21] RDX: 0000000000000000 RSI: ffffffff8127ef3d RDI: ffffed103b3dfe09 [ 50.143856][ T21] RBP: 0000000000000001 R08: ffff8881d9e36000 R09: ffffed103b663ed7 [ 50.151876][ T21] R10: ffffed103b663ed6 R11: ffff8881db31f6b7 R12: ffffffff86f04760 [ 50.160556][ T21] R13: ffffffff812db3c0 R14: ffffffff89384728 R15: ffff8881cfe88a60 [ 50.169274][ T21] ? calc_wheel_index+0x220/0x220 [ 50.174382][ T21] ? vprintk_func+0x7d/0x113 [ 50.178965][ T21] ? debug_print_object+0x160/0x250 [ 50.184421][ T21] debug_check_no_obj_freed+0x2a3/0x42e [ 50.190053][ T21] ? kfree+0xbc/0x280 [ 50.194033][ T21] ? rsi_probe+0xcec/0x15a0 [ 50.198869][ T21] kfree+0x101/0x280 [ 50.202956][ T21] rsi_probe+0xcec/0x15a0 [ 50.207456][ T21] ? rsi_disconnect+0x630/0x630 [ 50.212342][ T21] ? lock_set_class+0x2c0/0x5f0 [ 50.217599][ T21] ? __pm_runtime_resume+0x111/0x180 [ 50.222890][ T21] usb_probe_interface+0x305/0x7a0 [ 50.228171][ T21] ? usb_probe_device+0x100/0x100 [ 50.234592][ T21] really_probe+0x281/0x660 [ 50.239389][ T21] driver_probe_device+0x104/0x210 [ 50.244893][ T21] __device_attach_driver+0x1c2/0x220 [ 50.250768][ T21] ? driver_allows_async_probing+0x160/0x160 [ 50.257216][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.262159][ T21] ? bus_rescan_devices+0x20/0x20 [ 50.267268][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.273138][ T21] ? lockdep_hardirqs_on+0x379/0x580 [ 50.278769][ T21] __device_attach+0x217/0x360 [ 50.283625][ T21] ? device_bind_driver+0xd0/0xd0 [ 50.289288][ T21] ? kobject_uevent_env+0x29e/0x1150 [ 50.294648][ T21] ? kobject_uevent_env+0x2a8/0x1150 [ 50.300062][ T21] bus_probe_device+0x1e4/0x290 [ 50.305339][ T21] ? blocking_notifier_call_chain+0x54/0xa0 [ 50.311232][ T21] device_add+0xae6/0x16f0 [ 50.316016][ T21] ? uevent_store+0x50/0x50 [ 50.321185][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.327379][ T21] usb_set_configuration+0xdf6/0x1670 [ 50.332995][ T21] generic_probe+0x9d/0xd5 [ 50.337583][ T21] usb_probe_device+0x99/0x100 [ 50.342445][ T21] ? usb_suspend+0x620/0x620 [ 50.347201][ T21] really_probe+0x281/0x660 [ 50.351858][ T21] driver_probe_device+0x104/0x210 [ 50.357154][ T21] __device_attach_driver+0x1c2/0x220 [ 50.362796][ T21] ? driver_allows_async_probing+0x160/0x160 [ 50.369121][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.373982][ T21] ? bus_rescan_devices+0x20/0x20 [ 50.379349][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.385847][ T21] ? lockdep_hardirqs_on+0x379/0x580 [ 50.392015][ T21] __device_attach+0x217/0x360 [ 50.397193][ T21] ? device_bind_driver+0xd0/0xd0 [ 50.402917][ T21] ? kobject_uevent_env+0x29e/0x1150 [ 50.408389][ T21] ? kobject_uevent_env+0x2a8/0x1150 [ 50.414242][ T21] bus_probe_device+0x1e4/0x290 [ 50.419230][ T21] ? blocking_notifier_call_chain+0x54/0xa0 [ 50.425856][ T21] device_add+0xae6/0x16f0 [ 50.430437][ T21] ? uevent_store+0x50/0x50 [ 50.435030][ T21] usb_new_device.cold+0x8c1/0x1016 [ 50.440519][ T21] ? usb_port_suspend+0xa40/0xa40 [ 50.445539][ T21] ? mark_held_locks+0x9f/0xe0 [ 50.450401][ T21] ? _raw_spin_unlock_irq+0x24/0x30 [ 50.455722][ T21] hub_event+0x1ada/0x3590 [ 50.460137][ T21] ? hub_port_debounce+0x260/0x260 [ 50.465499][ T21] process_one_work+0x905/0x1570 [ 50.470527][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 50.476726][ T21] ? do_raw_spin_lock+0x11a/0x280 [ 50.482098][ T21] worker_thread+0x96/0xe20 [ 50.487138][ T21] ? process_one_work+0x1570/0x1570 [ 50.492356][ T21] kthread+0x30b/0x410 [ 50.496423][ T21] ? kthread_park+0x1a0/0x1a0 [ 50.501622][ T21] ret_from_fork+0x24/0x30 [ 50.506258][ T21] [ 50.506261][ T21] ====================================================== [ 50.506264][ T21] WARNING: possible circular locking dependency detected [ 50.506266][ T21] 5.2.0-rc6+ #13 Not tainted [ 50.506268][ T21] ------------------------------------------------------ [ 50.506271][ T21] kworker/1:1/21 is trying to acquire lock: [ 50.506272][ T21] 00000000ef73756d ((console_sem).lock){-.-.}, at: down_trylock+0xe/0x60 [ 50.506279][ T21] [ 50.506281][ T21] but task is already holding lock: [ 50.506283][ T21] 000000006f95f37a (&obj_hash[i].lock){-.-.}, at: debug_check_no_obj_freed+0xc4/0x42e [ 50.506290][ T21] [ 50.506292][ T21] which lock already depends on the new lock. [ 50.506293][ T21] [ 50.506294][ T21] [ 50.506296][ T21] the existing dependency chain (in reverse order) is: [ 50.506298][ T21] [ 50.506300][ T21] -> #3 (&obj_hash[i].lock){-.-.}: [ 50.506310][ T21] _raw_spin_lock_irqsave+0x32/0x50 [ 50.506312][ T21] __debug_object_init+0xb7/0xac0 [ 50.506314][ T21] hrtimer_init+0x27/0x260 [ 50.506316][ T21] init_dl_task_timer+0x17/0x50 [ 50.506318][ T21] __sched_fork.isra.0+0x207/0x460 [ 50.506320][ T21] init_idle+0x6c/0x760 [ 50.506321][ T21] sched_init+0x91f/0x9bc [ 50.506323][ T21] start_kernel+0x347/0x81a [ 50.506325][ T21] secondary_startup_64+0xa4/0xb0 [ 50.506326][ T21] [ 50.506327][ T21] -> #2 (&rq->lock){-.-.}: [ 50.506337][ T21] _raw_spin_lock+0x27/0x40 [ 50.506340][ T21] task_fork_fair+0x37/0x550 [ 50.506342][ T21] sched_fork+0x3a4/0x8d0 [ 50.506345][ T21] copy_process.part.0+0x16c1/0x63a0 [ 50.506346][ T21] _do_fork+0x233/0xec0 [ 50.506348][ T21] kernel_thread+0x2f/0x40 [ 50.506350][ T21] rest_init+0x23/0x371 [ 50.506352][ T21] start_kernel+0x7e0/0x81a [ 50.506354][ T21] secondary_startup_64+0xa4/0xb0 [ 50.506355][ T21] [ 50.506356][ T21] -> #1 (&p->pi_lock){-.-.}: [ 50.506362][ T21] _raw_spin_lock_irqsave+0x32/0x50 [ 50.506364][ T21] try_to_wake_up+0x80/0x1410 [ 50.506366][ T21] up+0x92/0xe0 [ 50.506367][ T21] __up_console_sem+0x42/0x80 [ 50.506369][ T21] console_unlock+0x5ab/0xbf0 [ 50.506371][ T21] vprintk_emit+0x171/0x3e0 [ 50.506373][ T21] vprintk_func+0x75/0x113 [ 50.506375][ T21] printk+0xba/0xed [ 50.506376][ T21] do_exit.cold+0x148/0x230 [ 50.506378][ T21] do_group_exit+0x125/0x350 [ 50.506380][ T21] __x64_sys_exit_group+0x3a/0x50 [ 50.506382][ T21] do_syscall_64+0xb7/0x560 [ 50.506384][ T21] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.506385][ T21] [ 50.506386][ T21] -> #0 ((console_sem).lock){-.-.}: [ 50.506393][ T21] lock_acquire+0x100/0x2b0 [ 50.506395][ T21] _raw_spin_lock_irqsave+0x32/0x50 [ 50.506397][ T21] down_trylock+0xe/0x60 [ 50.506399][ T21] __down_trylock_console_sem+0x31/0xc0 [ 50.506401][ T21] console_trylock+0x12/0x90 [ 50.506403][ T21] vprintk_emit+0x158/0x3e0 [ 50.506405][ T21] vprintk_func+0x75/0x113 [ 50.506406][ T21] printk+0xba/0xed [ 50.506408][ T21] __warn_printk+0x9b/0xf3 [ 50.506410][ T21] debug_print_object+0x160/0x250 [ 50.506412][ T21] debug_check_no_obj_freed+0x2a3/0x42e [ 50.506414][ T21] kfree+0x101/0x280 [ 50.506416][ T21] rsi_probe+0xcec/0x15a0 [ 50.506418][ T21] usb_probe_interface+0x305/0x7a0 [ 50.506419][ T21] really_probe+0x281/0x660 [ 50.506421][ T21] driver_probe_device+0x104/0x210 [ 50.506424][ T21] __device_attach_driver+0x1c2/0x220 [ 50.506425][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.506427][ T21] __device_attach+0x217/0x360 [ 50.506429][ T21] bus_probe_device+0x1e4/0x290 [ 50.506431][ T21] device_add+0xae6/0x16f0 [ 50.506433][ T21] usb_set_configuration+0xdf6/0x1670 [ 50.506435][ T21] generic_probe+0x9d/0xd5 [ 50.506437][ T21] usb_probe_device+0x99/0x100 [ 50.506439][ T21] really_probe+0x281/0x660 [ 50.506441][ T21] driver_probe_device+0x104/0x210 [ 50.506443][ T21] __device_attach_driver+0x1c2/0x220 [ 50.506445][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.506447][ T21] __device_attach+0x217/0x360 [ 50.506449][ T21] bus_probe_device+0x1e4/0x290 [ 50.506451][ T21] device_add+0xae6/0x16f0 [ 50.506453][ T21] usb_new_device.cold+0x8c1/0x1016 [ 50.506455][ T21] hub_event+0x1ada/0x3590 [ 50.506457][ T21] process_one_work+0x905/0x1570 [ 50.506459][ T21] worker_thread+0x96/0xe20 [ 50.506460][ T21] kthread+0x30b/0x410 [ 50.506462][ T21] ret_from_fork+0x24/0x30 [ 50.506463][ T21] [ 50.506465][ T21] other info that might help us debug this: [ 50.506466][ T21] [ 50.506468][ T21] Chain exists of: [ 50.506469][ T21] (console_sem).lock --> &rq->lock --> &obj_hash[i].lock [ 50.506477][ T21] [ 50.506479][ T21] Possible unsafe locking scenario: [ 50.506480][ T21] [ 50.506482][ T21] CPU0 CPU1 [ 50.506484][ T21] ---- ---- [ 50.506485][ T21] lock(&obj_hash[i].lock); [ 50.506489][ T21] lock(&rq->lock); [ 50.506493][ T21] lock(&obj_hash[i].lock); [ 50.506498][ T21] lock((console_sem).lock); [ 50.506503][ T21] [ 50.506505][ T21] *** DEADLOCK *** [ 50.506507][ T21] [ 50.506509][ T21] 6 locks held by kworker/1:1/21: [ 50.506511][ T21] #0: 0000000086d6d9b3 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81a/0x1570 [ 50.506523][ T21] #1: 000000002e201a50 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x84e/0x1570 [ 50.506536][ T21] #2: 00000000a01dc608 (&dev->mutex){....}, at: hub_event+0x179/0x3590 [ 50.506547][ T21] #3: 00000000e923bb7c (&dev->mutex){....}, at: __device_attach+0x7b/0x360 [ 50.506560][ T21] #4: 0000000089d31f9b (&dev->mutex){....}, at: __device_attach+0x7b/0x360 [ 50.506571][ T21] #5: 000000006f95f37a (&obj_hash[i].lock){-.-.}, at: debug_check_no_obj_freed+0xc4/0x42e [ 50.506582][ T21] [ 50.506583][ T21] stack backtrace: [ 50.506587][ T21] CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc6+ #13 [ 50.506591][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.506593][ T21] Workqueue: usb_hub_wq hub_event [ 50.506595][ T21] Call Trace: [ 50.506597][ T21] dump_stack+0xca/0x13e [ 50.506599][ T21] print_circular_bug.cold+0x1c4/0x282 [ 50.506601][ T21] __lock_acquire+0x3654/0x5340 [ 50.506602][ T21] ? mark_held_locks+0xe0/0xe0 [ 50.506604][ T21] ? enable_ptr_key_workfn+0x30/0x30 [ 50.506606][ T21] ? kvm_sched_clock_read+0x14/0x30 [ 50.506608][ T21] lock_acquire+0x100/0x2b0 [ 50.506609][ T21] ? down_trylock+0xe/0x60 [ 50.506611][ T21] ? vprintk_emit+0x158/0x3e0 [ 50.506613][ T21] _raw_spin_lock_irqsave+0x32/0x50 [ 50.506615][ T21] ? down_trylock+0xe/0x60 [ 50.506616][ T21] down_trylock+0xe/0x60 [ 50.506619][ T21] ? vprintk_emit+0x158/0x3e0 [ 50.506621][ T21] ? vprintk_emit+0x158/0x3e0 [ 50.506624][ T21] __down_trylock_console_sem+0x31/0xc0 [ 50.506625][ T21] console_trylock+0x12/0x90 [ 50.506627][ T21] vprintk_emit+0x158/0x3e0 [ 50.506629][ T21] ? calc_wheel_index+0x220/0x220 [ 50.506630][ T21] vprintk_func+0x75/0x113 [ 50.506632][ T21] printk+0xba/0xed [ 50.506634][ T21] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 50.506636][ T21] ? mark_held_locks+0xe0/0xe0 [ 50.506638][ T21] ? __device_attach+0x217/0x360 [ 50.506639][ T21] ? bus_probe_device+0x1e4/0x290 [ 50.506641][ T21] ? device_add+0xae6/0x16f0 [ 50.506643][ T21] ? usb_set_configuration+0xdf6/0x1670 [ 50.506645][ T21] ? generic_probe+0x9d/0xd5 [ 50.506647][ T21] ? really_probe+0x281/0x660 [ 50.506648][ T21] ? __warn_printk+0x8f/0xf3 [ 50.506650][ T21] ? rsi_mgmt_pkt_recv+0x1f40/0x1f40 [ 50.506652][ T21] __warn_printk+0x9b/0xf3 [ 50.506654][ T21] ? add_taint.cold+0x16/0x16 [ 50.506656][ T21] ? do_raw_spin_lock+0x11a/0x280 [ 50.506658][ T21] ? do_raw_spin_lock+0x11a/0x280 [ 50.506659][ T21] ? lock_acquire+0x100/0x2b0 [ 50.506661][ T21] ? rsi_mgmt_pkt_recv+0x1f40/0x1f40 [ 50.506663][ T21] debug_print_object+0x160/0x250 [ 50.506665][ T21] debug_check_no_obj_freed+0x2a3/0x42e [ 50.506667][ T21] ? kfree+0xbc/0x280 [ 50.506668][ T21] ? rsi_probe+0xcec/0x15a0 [ 50.506670][ T21] kfree+0x101/0x280 [ 50.506671][ T21] rsi_probe+0xcec/0x15a0 [ 50.506673][ T21] ? rsi_disconnect+0x630/0x630 [ 50.506675][ T21] ? lock_set_class+0x2c0/0x5f0 [ 50.506677][ T21] ? __pm_runtime_resume+0x111/0x180 [ 50.506679][ T21] usb_probe_interface+0x305/0x7a0 [ 50.506681][ T21] ? usb_probe_device+0x100/0x100 [ 50.506683][ T21] really_probe+0x281/0x660 [ 50.506685][ T21] driver_probe_device+0x104/0x210 [ 50.506687][ T21] __device_attach_driver+0x1c2/0x220 [ 50.506689][ T21] ? driver_allows_async_probing+0x160/0x160 [ 50.506691][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.506693][ T21] ? bus_rescan_devices+0x20/0x20 [ 50.506695][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.506697][ T21] ? lockdep_hardirqs_on+0x379/0x580 [ 50.506699][ T21] __device_attach+0x217/0x360 [ 50.506700][ T21] ? device_bind_driver+0xd0/0xd0 [ 50.506702][ T21] ? kobject_uevent_env+0x29e/0x1150 [ 50.506704][ T21] ? kobject_uevent_env+0x2a8/0x1150 [ 50.506706][ T21] bus_probe_device+0x1e4/0x290 [ 50.506708][ T21] ? blocking_notifier_call_chain+0x54/0xa0 [ 50.506710][ T21] device_add+0xae6/0x16f0 [ 50.506711][ T21] ? uevent_store+0x50/0x50 [ 50.506713][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.506715][ T21] usb_set_configuration+0xdf6/0x1670 [ 50.506717][ T21] generic_probe+0x9d/0xd5 [ 50.506719][ T21] usb_probe_device+0x99/0x100 [ 50.506720][ T21] ? usb_suspend+0x620/0x620 [ 50.506722][ T21] really_probe+0x281/0x660 [ 50.506724][ T21] driver_probe_device+0x104/0x210 [ 50.506726][ T21] __device_attach_driver+0x1c2/0x220 [ 50.506728][ T21] ? driver_allows_async_probing+0x160/0x160 [ 50.506730][ T21] bus_for_each_drv+0x15c/0x1e0 [ 50.506732][ T21] ? bus_rescan_devices+0x20/0x20 [ 50.506734][ T21] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 50.506736][ T21] ? lockdep_hardirqs_on+0x379/0x580 [ 50.506737][ T21] __device_attach+0x217/0x360 [ 50.506740][ T21] ? device_bind_driver+0xd0/0xd0 [ 50.506742][ T21] ? kobject_uevent_env+0x29e/0x1150 [ 50.506744][ T21] ? kobject_uevent_env+0x2a8/0x1150 [ 50.506746][ T21] bus_probe_device+0x1e4/0x290 [ 50.506748][ T21] ? blocking_notifier_call_chain+0x54/0xa0 [ 50.506750][ T21] device_add+0xae6/0x16f0 [ 50.506752][ T21] ? uevent_store+0x50/0x50 [ 50.506754][ T21] usb_new_device.cold+0x8c1/0x1016 [ 50.506755][ T21] ? usb_port_suspend+0xa40/0xa40 [ 50.506757][ T21] ? mark_held_locks+0x9f/0xe0 [ 50.506759][ T21] ? _raw_spin_unlock_irq+0x24/0x30 [ 50.506761][ T21] hub_event+0x1ada/0x3590 [ 50.506763][ T21] ? hub_port_debounce+0x260/0x260 [ 50.506764][ T21] process_one_work+0x905/0x1570 [ 50.506766][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 50.506768][ T21] ? do_raw_spin_lock+0x11a/0x280 [ 50.506770][ T21] worker_thread+0x96/0xe20 [ 50.506772][ T21] ? process_one_work+0x1570/0x1570 [ 50.506773][ T21] kthread+0x30b/0x410 [ 50.506775][ T21] ? kthread_park+0x1a0/0x1a0 [ 50.506777][ T21] ret_from_fork+0x24/0x30 [ 50.507594][ T21] Kernel Offset: disabled [ 51.725473][ T21] Rebooting in 86400 seconds..