[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.156' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 479.016327][ T5] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 479.266236][ T5] usb 1-1: Using ep0 maxpacket: 16 [ 479.406375][ T5] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 479.417454][ T5] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 479.431458][ T5] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 479.440625][ T5] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 479.451566][ T5] usb 1-1: config 0 descriptor?? [ 479.938942][ T5] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 479.946926][ T5] microsoft 0003:045E:07DA.0001: ignoring exceeding usage max [ 479.957779][ T5] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 479.965148][ T5] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 479.972895][ T5] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 [ 479.980422][ T5] microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 636.933081][ T1150] INFO: task khugepaged:1160 blocked for more than 143 seconds. [ 636.940958][ T1150] Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 [ 636.950059][ T1150] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.959699][ T1150] khugepaged D28584 1160 2 0x00004000 [ 636.967270][ T1150] Call Trace: [ 636.970812][ T1150] __schedule+0x8b4/0x1e80 [ 636.976574][ T1150] ? io_schedule_timeout+0x140/0x140 [ 636.982088][ T1150] ? __lock_acquire+0x16e3/0x56e0 [ 636.988384][ T1150] schedule+0xd0/0x2a0 [ 636.992555][ T1150] schedule_timeout+0x1d8/0x250 [ 636.998657][ T1150] ? usleep_range+0x170/0x170 [ 637.004276][ T1150] ? mark_held_locks+0x9f/0xe0 [ 637.009217][ T1150] ? _raw_spin_unlock_irq+0x1f/0x80 [ 637.016666][ T1150] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.022806][ T1150] ? trace_hardirqs_on+0x5f/0x220 [ 637.029101][ T1150] wait_for_completion+0x163/0x260 [ 637.035177][ T1150] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 637.041786][ T1150] ? _raw_spin_unlock_irq+0x1f/0x80 [ 637.048255][ T1150] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.055185][ T1150] __flush_work+0x51f/0xab0 [ 637.059791][ T1150] ? queue_work_node+0x370/0x370 [ 637.065893][ T1150] ? lock_downgrade+0x820/0x820 [ 637.070884][ T1150] ? flush_workqueue_prep_pwqs+0x4f0/0x4f0 [ 637.077997][ T1150] ? queue_work_on+0xe6/0x200 [ 637.082755][ T1150] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.090120][ T1150] ? trace_hardirqs_on+0x5f/0x220 [ 637.096143][ T1150] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 637.102223][ T1150] lru_add_drain_all+0x3ca/0x590 [ 637.108442][ T1150] khugepaged+0x10b/0x5a10 [ 637.113691][ T1150] ? collapse_pte_mapped_thp+0xb90/0xb90 [ 637.119422][ T1150] ? __kthread_parkme+0xad/0x1e0 [ 637.125528][ T1150] ? lock_downgrade+0x820/0x820 [ 637.130582][ T1150] ? finish_wait+0x260/0x260 [ 637.136462][ T1150] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 637.142358][ T1150] ? __kthread_parkme+0x4c/0x1e0 [ 637.148770][ T1150] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.155573][ T1150] ? trace_hardirqs_on+0x5f/0x220 [ 637.160766][ T1150] ? lockdep_hardirqs_on+0x6a/0xe0 [ 637.167171][ T1150] ? __kthread_parkme+0x13f/0x1e0 [ 637.172272][ T1150] ? collapse_pte_mapped_thp+0xb90/0xb90 [ 637.179057][ T1150] kthread+0x3b5/0x4a0 [ 637.184048][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 637.189246][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 637.195578][ T1150] ret_from_fork+0x1f/0x30 [ 637.200314][ T1150] [ 637.200314][ T1150] Showing all locks held in the system: [ 637.209713][ T1150] 6 locks held by kworker/0:0/5: [ 637.216206][ T1150] 1 lock held by khungtaskd/1150: [ 637.221329][ T1150] #0: ffffffff89bc3000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.233567][ T1150] 1 lock held by khugepaged/1160: [ 637.238697][ T1150] #0: ffffffff89c48448 (lock#4){+.+.}-{3:3}, at: lru_add_drain_all+0x59/0x590 [ 637.248969][ T1150] 1 lock held by in:imklog/6654: [ 637.254647][ T1150] #0: ffff8880935425f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.264682][ T1150] [ 637.267081][ T1150] ============================================= [ 637.267081][ T1150] [ 637.276666][ T1150] NMI backtrace for cpu 1 [ 637.281473][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 [ 637.290914][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.301394][ T1150] Call Trace: [ 637.304769][ T1150] dump_stack+0x18f/0x20d [ 637.309097][ T1150] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.314342][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.319976][ T1150] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.326001][ T1150] watchdog+0xd89/0xf30 [ 637.330154][ T1150] ? trace_sched_process_hang+0x2e0/0x2e0 [ 637.335870][ T1150] kthread+0x3b5/0x4a0 [ 637.339931][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 637.345130][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 637.350239][ T1150] ret_from_fork+0x1f/0x30 [ 637.354816][ T1150] Sending NMI from CPU 1 to CPUs 0: [ 637.361419][ C0] NMI backtrace for cpu 0 [ 637.361426][ C0] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 [ 637.361432][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.361436][ C0] Workqueue: usb_hub_wq hub_event [ 637.361442][ C0] RIP: 0010:hid_setup_resolution_multiplier+0x3a3/0x9b0 [ 637.361454][ C0] Code: b6 14 38 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 df 04 00 00 45 8b 74 24 04 bf 02 00 00 00 44 89 f6 e8 6d 62 90 fb <41> 83 fe 02 0f 85 74 ff ff ff 4c 89 24 24 e8 da 65 90 fb 49 8d 7d [ 637.361458][ C0] RSP: 0018:ffffc90000cbec18 EFLAGS: 00000293 [ 637.361465][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff85e38373 [ 637.361470][ C0] RDX: 0000000000000000 RSI: ffff8880a9598140 RDI: 0000000000000005 [ 637.361475][ C0] RBP: ffff88809f43e800 R08: 0000000000000001 R09: ffffc900015ee0cc [ 637.361480][ C0] R10: 0000000000000002 R11: 0000000000000000 R12: ffff88809f43e800 [ 637.361485][ C0] R13: ffff888085800000 R14: 0000000000000000 R15: dffffc0000000000 [ 637.361491][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 637.361495][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.361500][ C0] CR2: 000055726aabf328 CR3: 00000000a0102000 CR4: 00000000001506f0 [ 637.361505][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.361510][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.361512][ C0] Call Trace: [ 637.361517][ C0] ? hid_concatenate_last_usage_page+0x57/0x210 [ 637.361519][ C0] ? memset+0x20/0x40 [ 637.361523][ C0] hid_open_report+0x438/0x640 [ 637.361526][ C0] ? hid_output_report+0x4e0/0x4e0 [ 637.361530][ C0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.361534][ C0] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 637.361537][ C0] ms_probe+0x12d/0x4b0 [ 637.361540][ C0] ? ms_remove+0x90/0x90 [ 637.361543][ C0] hid_device_probe+0x2bd/0x3f0 [ 637.361546][ C0] ? hid_match_device+0x390/0x390 [ 637.361550][ C0] really_probe+0x282/0x8a0 [ 637.361553][ C0] driver_probe_device+0xfe/0x1d0 [ 637.361556][ C0] __device_attach_driver+0x1c2/0x220 [ 637.361560][ C0] ? driver_allows_async_probing+0x150/0x150 [ 637.361564][ C0] bus_for_each_drv+0x15f/0x1e0 [ 637.361567][ C0] ? bus_for_each_dev+0x1d0/0x1d0 [ 637.361570][ C0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 637.361574][ C0] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 637.361578][ C0] __device_attach+0x28d/0x3f0 [ 637.361581][ C0] ? device_bind_driver+0xd0/0xd0 [ 637.361585][ C0] ? kobject_uevent_env+0x2a0/0x12c0 [ 637.361588][ C0] ? kobject_uevent_env+0x2aa/0x12c0 [ 637.361591][ C0] bus_probe_device+0x1e4/0x290 [ 637.361594][ C0] device_add+0xacf/0x1b00 [ 637.361598][ C0] ? device_check_offline+0x280/0x280 [ 637.361601][ C0] ? __debugfs_create_file+0x312/0x3f0 [ 637.361605][ C0] hid_add_device+0x344/0x9b0 [ 637.361608][ C0] ? modalias_show+0x150/0x150 [ 637.361612][ C0] ? lockdep_init_map_waits+0x26a/0x890 [ 637.361615][ C0] usbhid_probe+0xac8/0xff0 [ 637.361618][ C0] usb_probe_interface+0x2f7/0x780 [ 637.361621][ C0] ? usb_device_match+0x300/0x300 [ 637.361625][ C0] really_probe+0x282/0x8a0 [ 637.361628][ C0] driver_probe_device+0xfe/0x1d0 [ 637.361632][ C0] __device_attach_driver+0x1c2/0x220 [ 637.361636][ C0] ? driver_allows_async_probing+0x150/0x150 [ 637.361639][ C0] bus_for_each_drv+0x15f/0x1e0 [ 637.361642][ C0] ? bus_for_each_dev+0x1d0/0x1d0 [ 637.361646][ C0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 637.361650][ C0] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 637.361653][ C0] __device_attach+0x28d/0x3f0 [ 637.361656][ C0] ? device_bind_driver+0xd0/0xd0 [ 637.361660][ C0] ? kobject_uevent_env+0x2a0/0x12c0 [ 637.361663][ C0] ? kobject_uevent_env+0x2aa/0x12c0 [ 637.361667][ C0] bus_probe_device+0x1e4/0x290 [ 637.361670][ C0] device_add+0xacf/0x1b00 [ 637.361673][ C0] ? device_check_offline+0x280/0x280 [ 637.361677][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 637.361680][ C0] usb_set_configuration+0xef6/0x17a0 [ 637.361684][ C0] usb_generic_driver_probe+0xba/0xf2 [ 637.361687][ C0] usb_probe_device+0xc6/0x210 [ 637.361691][ C0] ? usb_unbind_device+0x1a0/0x1a0 [ 637.361694][ C0] really_probe+0x282/0x8a0 [ 637.361697][ C0] driver_probe_device+0xfe/0x1d0 [ 637.361701][ C0] __device_attach_driver+0x1c2/0x220 [ 637.361704][ C0] ? driver_allows_async_probing+0x150/0x150 [ 637.361708][ C0] bus_for_each_drv+0x15f/0x1e0 [ 637.361711][ C0] ? bus_for_each_dev+0x1d0/0x1d0 [ 637.361714][ C0] ? lockdep_hardirqs_on+0x6a/0xe0 [ 637.361718][ C0] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 637.361721][ C0] __device_attach+0x28d/0x3f0 [ 637.361725][ C0] ? device_bind_driver+0xd0/0xd0 [ 637.361728][ C0] ? kobject_uevent_env+0x2a0/0x12c0 [ 637.361732][ C0] ? kobject_uevent_env+0x2aa/0x12c0 [ 637.361735][ C0] bus_probe_device+0x1e4/0x290 [ 637.361738][ C0] device_add+0xacf/0x1b00 [ 637.361742][ C0] ? device_check_offline+0x280/0x280 [ 637.361745][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 637.361749][ C0] usb_new_device.cold+0x748/0x103b [ 637.361752][ C0] ? hub_disconnect+0x510/0x510 [ 637.361756][ C0] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 637.361759][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 637.361762][ C0] hub_event+0x2033/0x3e40 [ 637.361766][ C0] ? hub_port_debounce+0x2d0/0x2d0 [ 637.361769][ C0] ? queue_work_on+0x61/0x200 [ 637.361772][ C0] ? lock_release+0x8d0/0x8d0 [ 637.361775][ C0] ? lock_downgrade+0x820/0x820 [ 637.361779][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 637.361782][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 637.361785][ C0] ? lock_is_held_type+0xb0/0xe0 [ 637.361789][ C0] process_one_work+0x94c/0x1670 [ 637.361792][ C0] ? lock_release+0x8d0/0x8d0 [ 637.361795][ C0] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 637.361799][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 637.361802][ C0] ? lockdep_hardirqs_off+0x66/0xa0 [ 637.361805][ C0] worker_thread+0x64c/0x1120 [ 637.361809][ C0] ? process_one_work+0x1670/0x1670 [ 637.361812][ C0] kthread+0x3b5/0x4a0 [ 637.361815][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 637.361818][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 637.361821][ C0] ret_from_fork+0x1f/0x30 [ 637.361827][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 637.405195][ T1150] Kernel panic - not syncing: hung_task: blocked tasks [ 637.981540][ T1150] CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 [ 637.990987][ T1150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 638.001126][ T1150] Call Trace: [ 638.004418][ T1150] dump_stack+0x18f/0x20d [ 638.008828][ T1150] panic+0x2e3/0x75c [ 638.012719][ T1150] ? __warn_printk+0xf3/0xf3 [ 638.017319][ T1150] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 638.022962][ T1150] ? preempt_schedule_thunk+0x16/0x18 [ 638.028340][ T1150] ? watchdog.cold+0x22d/0x24b [ 638.033098][ T1150] ? watchdog+0xc59/0xf30 [ 638.037427][ T1150] watchdog.cold+0x23e/0x24b [ 638.042027][ T1150] ? trace_sched_process_hang+0x2e0/0x2e0 [ 638.047750][ T1150] kthread+0x3b5/0x4a0 [ 638.051823][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 638.056937][ T1150] ? __kthread_bind_mask+0xc0/0xc0 [ 638.062055][ T1150] ret_from_fork+0x1f/0x30 [ 638.068031][ T1150] Kernel Offset: disabled [ 638.072361][ T1150] Rebooting in 86400 seconds..