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 '10.128.1.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 284.811275][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 285.051102][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 285.171287][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 285.182301][ T12] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 285.195409][ T12] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 285.204481][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 285.213838][ T12] usb 1-1: config 0 descriptor?? [ 390.710972][ C0] rcu: INFO: rcu_sched self-detected stall on CPU [ 390.717567][ C0] rcu: 0-....: (10499 ticks this GP) idle=3ae/1/0x4000000000000002 softirq=2359/2359 fqs=5236 [ 390.728044][ C0] (t=10500 jiffies g=1457 q=28) [ 390.732963][ C0] NMI backtrace for cpu 0 [ 390.737310][ C0] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 390.745434][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 390.755539][ C0] Workqueue: usb_hub_wq hub_event [ 390.760537][ C0] Call Trace: [ 390.763811][ C0] [ 390.766718][ C0] dump_stack+0xef/0x16e [ 390.770986][ C0] ? lapic_can_unplug_cpu.cold+0x1c/0x3b [ 390.776592][ C0] nmi_cpu_backtrace.cold+0x55/0x96 [ 390.781764][ C0] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 390.787370][ C0] nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 [ 390.793360][ C0] rcu_dump_cpu_stacks+0x169/0x1b3 [ 390.798447][ C0] rcu_sched_clock_irq.cold+0x503/0x95f [ 390.803982][ C0] ? trace_hardirqs_off+0x50/0x1d0 [ 390.809085][ C0] update_process_times+0x25/0x60 [ 390.814117][ C0] tick_sched_handle+0x9b/0x180 [ 390.818945][ C0] tick_sched_timer+0x42/0x130 [ 390.823684][ C0] __hrtimer_run_queues+0x303/0xc60 [ 390.828860][ C0] ? tick_sched_do_timer+0x1a0/0x1a0 [ 390.834119][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 390.840075][ C0] ? ktime_get_update_offsets_now+0x24c/0x320 [ 390.846116][ C0] hrtimer_interrupt+0x2e8/0x730 [ 390.851076][ C0] smp_apic_timer_interrupt+0xf5/0x500 [ 390.856510][ C0] apic_timer_interrupt+0xf/0x20 [ 390.861419][ C0] [ 390.864368][ C0] RIP: 0010:hid_setup_resolution_multiplier+0x326/0x990 [ 390.871293][ C0] Code: 48 63 5d 00 bf ff ff ff ff 89 de e8 94 7b e5 fc 83 fb ff 74 78 e8 ea 79 e5 fc 48 8d 7d 04 48 89 f8 48 c1 e8 03 42 0f b6 14 38 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 0c 05 00 00 44 [ 390.890882][ C0] RSP: 0018:ffff8881da226cb0 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 [ 390.899266][ C0] RAX: 1ffff1103a802e80 RBX: 0000000000000000 RCX: ffffffff845985ac [ 390.907212][ C0] RDX: 0000000000000000 RSI: ffffffff845985b6 RDI: ffff8881d4017404 [ 390.915166][ C0] RBP: ffff8881d4017400 R08: ffff8881da211880 R09: ffffc900008550cc [ 390.923112][ C0] R10: fffff5200010e01b R11: ffffc900008700db R12: ffff8881c5a80000 [ 390.931073][ C0] R13: 0000000000000000 R14: ffff8881d4017400 R15: dffffc0000000000 [ 390.939025][ C0] ? hid_setup_resolution_multiplier+0x30c/0x990 [ 390.945327][ C0] ? hid_setup_resolution_multiplier+0x316/0x990 [ 390.951659][ C0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 390.957527][ C0] hid_open_report+0x438/0x640 [ 390.962268][ C0] ? hid_parser_global+0x1440/0x1440 [ 390.967566][ C0] ? add_dr+0xb4/0x190 [ 390.971626][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 390.977457][ C0] ms_probe+0x12d/0x4d0 [ 390.981590][ C0] ? ms_remove+0x90/0x90 [ 390.985804][ C0] hid_device_probe+0x2be/0x3f0 [ 390.990627][ C0] ? hid_match_device+0x1f0/0x1f0 [ 390.995648][ C0] really_probe+0x281/0x6d0 [ 391.000126][ C0] driver_probe_device+0x104/0x210 [ 391.005219][ C0] __device_attach_driver+0x1c2/0x220 [ 391.010565][ C0] ? driver_allows_async_probing+0x160/0x160 [ 391.016517][ C0] bus_for_each_drv+0x162/0x1e0 [ 391.021342][ C0] ? bus_rescan_devices+0x20/0x20 [ 391.026422][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 391.032281][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 391.037551][ C0] __device_attach+0x217/0x360 [ 391.042307][ C0] ? device_bind_driver+0xd0/0xd0 [ 391.047309][ C0] bus_probe_device+0x1e4/0x290 [ 391.052177][ C0] device_add+0x1480/0x1c20 [ 391.056662][ C0] ? device_links_flush_sync_list+0x350/0x350 [ 391.062756][ C0] ? __debugfs_create_file+0x301/0x3f0 [ 391.068198][ C0] hid_add_device+0x33c/0x9a0 [ 391.072893][ C0] ? debug_object_fixup+0x30/0x30 [ 391.077895][ C0] ? __hid_bus_reprobe_drivers+0x130/0x130 [ 391.083679][ C0] ? lockdep_init_map+0x1b0/0x5e0 [ 391.088706][ C0] usbhid_probe+0xa81/0xfa0 [ 391.093226][ C0] usb_probe_interface+0x305/0x7a0 [ 391.098317][ C0] ? usb_probe_device+0x100/0x100 [ 391.103316][ C0] really_probe+0x281/0x6d0 [ 391.107796][ C0] driver_probe_device+0x104/0x210 [ 391.112892][ C0] __device_attach_driver+0x1c2/0x220 [ 391.118242][ C0] ? driver_allows_async_probing+0x160/0x160 [ 391.124218][ C0] bus_for_each_drv+0x162/0x1e0 [ 391.129069][ C0] ? bus_rescan_devices+0x20/0x20 [ 391.134076][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 391.139873][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 391.145138][ C0] __device_attach+0x217/0x360 [ 391.149881][ C0] ? device_bind_driver+0xd0/0xd0 [ 391.154893][ C0] bus_probe_device+0x1e4/0x290 [ 391.159720][ C0] device_add+0x1480/0x1c20 [ 391.164202][ C0] ? wait_for_completion+0x3c0/0x3c0 [ 391.169463][ C0] ? device_links_flush_sync_list+0x350/0x350 [ 391.175540][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 391.181325][ C0] usb_set_configuration+0xe67/0x1740 [ 391.186674][ C0] generic_probe+0x9d/0xd5 [ 391.191083][ C0] usb_probe_device+0x99/0x100 [ 391.195827][ C0] ? usb_suspend+0x620/0x620 [ 391.200406][ C0] really_probe+0x281/0x6d0 [ 391.204892][ C0] driver_probe_device+0x104/0x210 [ 391.209980][ C0] __device_attach_driver+0x1c2/0x220 [ 391.215414][ C0] ? driver_allows_async_probing+0x160/0x160 [ 391.221372][ C0] bus_for_each_drv+0x162/0x1e0 [ 391.226199][ C0] ? bus_rescan_devices+0x20/0x20 [ 391.231200][ C0] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 391.236986][ C0] ? lockdep_hardirqs_on+0x382/0x580 [ 391.242251][ C0] __device_attach+0x217/0x360 [ 391.246991][ C0] ? device_bind_driver+0xd0/0xd0 [ 391.251993][ C0] bus_probe_device+0x1e4/0x290 [ 391.256824][ C0] device_add+0x1480/0x1c20 [ 391.261309][ C0] ? device_links_flush_sync_list+0x350/0x350 [ 391.267369][ C0] usb_new_device.cold+0x6a4/0xe79 [ 391.272459][ C0] hub_event+0x1e59/0x3860 [ 391.276897][ C0] ? hub_port_debounce+0x260/0x260 [ 391.281992][ C0] ? find_held_lock+0x2d/0x110 [ 391.286736][ C0] ? mark_held_locks+0xe0/0xe0 [ 391.291478][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 391.297000][ C0] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 391.302327][ C0] process_one_work+0x92b/0x1530 [ 391.307252][ C0] ? pwq_dec_nr_in_flight+0x310/0x310 [ 391.312602][ C0] ? do_raw_spin_lock+0x11a/0x280 [ 391.317601][ C0] worker_thread+0x96/0xe20 [ 391.322079][ C0] ? process_one_work+0x1530/0x1530 [ 391.327251][ C0] kthread+0x318/0x420 [ 391.331295][ C0] ? kthread_create_on_node+0xf0/0xf0 [ 391.336639][ C0] ret_from_fork+0x24/0x30 [ 394.871047][ T22] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 10897 jiffies s: 81 root: 0x1/. [ 394.882499][ T22] rcu: blocking rcu_node structures: [ 394.887774][ T22] Task dump for CPU 0: [ 394.891871][ T22] kworker/0:1 R running task 25864 12 2 0x80004008 [ 394.899772][ T22] Workqueue: usb_hub_wq hub_event [ 394.904820][ T22] Call Trace: [ 394.908129][ T22] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 394.913607][ T22] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 394.919066][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 394.924364][ T22] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 394.929814][ T22] ? retint_kernel+0x10/0x10 [ 394.934419][ T22] ? hid_setup_resolution_multiplier+0x34c/0x990 [ 394.940737][ T22] ? hid_setup_resolution_multiplier+0x357/0x990 [ 394.947079][ T22] ? __sanitizer_cov_trace_pc+0x2b/0x60 [ 394.952639][ T22] ? hid_setup_resolution_multiplier+0x34c/0x990 [ 394.958957][ T22] ? hid_setup_resolution_multiplier+0x316/0x990 [ 394.965308][ T22] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 394.971219][ T22] ? hid_open_report+0x438/0x640 [ 394.976147][ T22] ? hid_parser_global+0x1440/0x1440 [ 394.981447][ T22] ? add_dr+0xb4/0x190 [ 394.985510][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 394.991344][ T22] ? ms_probe+0x12d/0x4d0 [ 394.995665][ T22] ? ms_remove+0x90/0x90 [ 394.999901][ T22] ? hid_device_probe+0x2be/0x3f0 [ 395.004954][ T22] ? hid_match_device+0x1f0/0x1f0 [ 395.009968][ T22] ? really_probe+0x281/0x6d0 [ 395.014658][ T22] ? driver_probe_device+0x104/0x210 [ 395.019934][ T22] ? __device_attach_driver+0x1c2/0x220 [ 395.025499][ T22] ? driver_allows_async_probing+0x160/0x160 [ 395.031496][ T22] ? bus_for_each_drv+0x162/0x1e0 [ 395.036513][ T22] ? bus_rescan_devices+0x20/0x20 [ 395.041551][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 395.047347][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 395.052647][ T22] ? __device_attach+0x217/0x360 [ 395.057575][ T22] ? device_bind_driver+0xd0/0xd0 [ 395.062615][ T22] ? bus_probe_device+0x1e4/0x290 [ 395.067632][ T22] ? device_add+0x1480/0x1c20 [ 395.072323][ T22] ? device_links_flush_sync_list+0x350/0x350 [ 395.078382][ T22] ? __debugfs_create_file+0x301/0x3f0 [ 395.083860][ T22] ? hid_add_device+0x33c/0x9a0 [ 395.088702][ T22] ? debug_object_fixup+0x30/0x30 [ 395.093760][ T22] ? __hid_bus_reprobe_drivers+0x130/0x130 [ 395.099556][ T22] ? lockdep_init_map+0x1b0/0x5e0 [ 395.104620][ T22] ? usbhid_probe+0xa81/0xfa0 [ 395.109291][ T22] ? usb_probe_interface+0x305/0x7a0 [ 395.114593][ T22] ? usb_probe_device+0x100/0x100 [ 395.119608][ T22] ? really_probe+0x281/0x6d0 [ 395.124301][ T22] ? driver_probe_device+0x104/0x210 [ 395.129578][ T22] ? __device_attach_driver+0x1c2/0x220 [ 395.135142][ T22] ? driver_allows_async_probing+0x160/0x160 [ 395.141137][ T22] ? bus_for_each_drv+0x162/0x1e0 [ 395.146152][ T22] ? bus_rescan_devices+0x20/0x20 [ 395.151194][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 395.156995][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 395.162296][ T22] ? __device_attach+0x217/0x360 [ 395.167235][ T22] ? device_bind_driver+0xd0/0xd0 [ 395.172284][ T22] ? bus_probe_device+0x1e4/0x290 [ 395.177315][ T22] ? device_add+0x1480/0x1c20 [ 395.182020][ T22] ? wait_for_completion+0x3c0/0x3c0 [ 395.187296][ T22] ? device_links_flush_sync_list+0x350/0x350 [ 395.193376][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 395.199175][ T22] ? usb_set_configuration+0xe67/0x1740 [ 395.204878][ T22] ? generic_probe+0x9d/0xd5 [ 395.209470][ T22] ? usb_probe_device+0x99/0x100 [ 395.214432][ T22] ? usb_suspend+0x620/0x620 [ 395.219019][ T22] ? really_probe+0x281/0x6d0 [ 395.223732][ T22] ? driver_probe_device+0x104/0x210 [ 395.229017][ T22] ? __device_attach_driver+0x1c2/0x220 [ 395.234583][ T22] ? driver_allows_async_probing+0x160/0x160 [ 395.240557][ T22] ? bus_for_each_drv+0x162/0x1e0 [ 395.245601][ T22] ? bus_rescan_devices+0x20/0x20 [ 395.250636][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 395.256459][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 395.261764][ T22] ? __device_attach+0x217/0x360 [ 395.266693][ T22] ? device_bind_driver+0xd0/0xd0 [ 395.271744][ T22] ? bus_probe_device+0x1e4/0x290 [ 395.276760][ T22] ? device_add+0x1480/0x1c20 [ 395.281482][ T22] ? device_links_flush_sync_list+0x350/0x350 [ 395.287557][ T22] ? usb_new_device.cold+0x6a4/0xe79 [ 395.292875][ T22] ? hub_event+0x1e59/0x3860 [ 395.297464][ T22] ? hub_port_debounce+0x260/0x260 [ 395.302604][ T22] ? find_held_lock+0x2d/0x110 [ 395.307367][ T22] ? mark_held_locks+0xe0/0xe0 [ 395.312158][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 395.317700][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 395.323002][ T22] ? process_one_work+0x92b/0x1530 [ 395.328109][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 395.333503][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 395.338519][ T22] ? worker_thread+0x96/0xe20 [ 395.343210][ T22] ? process_one_work+0x1530/0x1530 [ 395.348399][ T22] ? kthread+0x318/0x420 [ 395.352659][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 395.358024][ T22] ? ret_from_fork+0x24/0x30