[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   14.923342][    C1] random: crng init done
[....] 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 '10.128.0.79' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.148036][   T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   47.388025][   T12] usb 1-1: Using ep0 maxpacket: 8
[   47.508150][   T12] usb 1-1: config 0 has an invalid interface number: 23 but max is 0
[   47.516313][   T12] usb 1-1: config 0 has no interface number 0
[   47.522619][   T12] usb 1-1: config 0 interface 23 altsetting 0 endpoint 0x7 has invalid maxpacket 1025, setting to 64
[   47.533645][   T12] usb 1-1: New USB device found, idVendor=174f, idProduct=8a33, bcdDevice=a8.42
[   47.542713][   T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   47.551842][   T12] usb 1-1: config 0 descriptor??
[   47.589963][   T12] WARNING: CPU: 0 PID: 12 at kernel/workqueue.c:3031 __flush_work+0x93f/0xa80
[   47.598880][   T12] Kernel panic - not syncing: panic_on_warn set ...
[   47.605576][   T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc6+ #13
[   47.613009][   T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.623091][   T12] Workqueue: usb_hub_wq hub_event
[   47.628104][   T12] Call Trace:
[   47.631376][   T12]  dump_stack+0xca/0x13e
[   47.635610][   T12]  ? __flush_work+0x840/0xa80
[   47.640270][   T12]  panic+0x292/0x6c9
[   47.644245][   T12]  ? __warn_printk+0xf3/0xf3
[   47.648820][   T12]  ? __flush_work+0x93f/0xa80
[   47.653481][   T12]  ? __probe_kernel_read+0x16c/0x1b0
[   47.658753][   T12]  ? __warn.cold+0x5/0x4b
[   47.663071][   T12]  ? __warn+0xe4/0x1c0
[   47.667129][   T12]  ? __flush_work+0x93f/0xa80
[   47.671780][   T12]  __warn.cold+0x20/0x4b
[   47.676042][   T12]  ? __flush_work+0x93f/0xa80
[   47.680707][   T12]  report_bug+0x262/0x2a0
[   47.685012][   T12]  do_error_trap+0x12b/0x1e0
[   47.689700][   T12]  ? __flush_work+0x93f/0xa80
[   47.694369][   T12]  do_invalid_op+0x32/0x40
[   47.698772][   T12]  ? __flush_work+0x93f/0xa80
[   47.703432][   T12]  invalid_op+0x14/0x20
[   47.707568][   T12] RIP: 0010:__flush_work+0x93f/0xa80
[   47.712830][   T12] Code: e8 d6 4f 23 00 48 c7 c2 c9 8b 19 81 be 01 00 00 00 45 31 e4 48 c7 c7 a0 83 ef 86 e8 6b 4d 0b 00 e9 d9 fb ff ff e8 b1 4f 23 00 <0f> 0b 45 31 e4 e9 ca fb ff ff e8 a2 4f 23 00 e8 0d 08 12 00 31 ff
[   47.732530][   T12] RSP: 0018:ffff8881d9e0ed98 EFLAGS: 00010293
[   47.738580][   T12] RAX: ffff8881d9df9800 RBX: ffff8881cf5505b0 RCX: dffffc0000000000
[   47.746586][   T12] RDX: 0000000000000000 RSI: ffffffff81198bff RDI: 0000000000000001
[   47.754543][   T12] RBP: ffff8881d9e0ef00 R08: ffff8881d9df9800 R09: 0000000000000000
[   47.762541][   T12] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[   47.770535][   T12] R13: 0000000000000001 R14: 0000000000000293 R15: ffff8881cf5505c8
[   47.778508][   T12]  ? __flush_work+0x93f/0xa80
[   47.783257][   T12]  ? __flush_work+0x93f/0xa80
[   47.787928][   T12]  ? wq_pool_ids_show+0x310/0x310
[   47.792987][   T12]  ? number+0x82a/0xb00
[   47.797120][   T12]  ? skip_atoi+0xab/0xe0
[   47.801380][   T12]  ? put_dec+0xd0/0xd0
[   47.805471][   T12]  ? format_decode+0x230/0xad0
[   47.810222][   T12]  ? mark_held_locks+0x9f/0xe0
[   47.814986][   T12]  __cancel_work_timer+0x312/0x440
[   47.820085][   T12]  ? work_on_cpu_safe+0x70/0x70
[   47.824923][   T12]  ? _cond_resched+0x10/0x20
[   47.829495][   T12]  ? usb_kill_urb+0x198/0x2c0
[   47.834157][   T12]  ? usb_poison_anchored_urbs+0x150/0x150
[   47.839862][   T12]  uvc_ctrl_cleanup_device+0x22/0x483
[   47.845217][   T12]  ? uvc_delete+0x21/0x2f0
[   47.849636][   T12]  ? rcu_read_lock_sched_held+0x113/0x130
[   47.855427][   T12]  uvc_delete+0x29/0x2f0
[   47.859688][   T12]  uvc_probe+0xf95/0x64e4
[   47.864008][   T12]  ? mark_held_locks+0xe0/0xe0
[   47.868859][   T12]  ? __pm_runtime_set_status+0x702/0xa10
[   47.874520][   T12]  ? pm_runtime_enable+0x2a/0x310
[   47.879538][   T12]  ? usb_probe_interface+0x580/0x7a0
[   47.884880][   T12]  ? pm_runtime_enable+0x2a/0x310
[   47.889926][   T12]  ? mark_held_locks+0x9f/0xe0
[   47.894678][   T12]  ? usb_probe_interface+0x305/0x7a0
[   47.900061][   T12]  usb_probe_interface+0x305/0x7a0
[   47.905153][   T12]  ? usb_probe_device+0x100/0x100
[   47.910157][   T12]  really_probe+0x281/0x660
[   47.914643][   T12]  driver_probe_device+0x104/0x210
[   47.919740][   T12]  __device_attach_driver+0x1c2/0x220
[   47.925246][   T12]  ? driver_allows_async_probing+0x160/0x160
[   47.931208][   T12]  bus_for_each_drv+0x15c/0x1e0
[   47.936042][   T12]  ? bus_rescan_devices+0x20/0x20
[   47.941097][   T12]  ? _raw_spin_unlock_irqrestore+0x3e/0x50
[   47.946891][   T12]  ? lockdep_hardirqs_on+0x379/0x580
[   47.952162][   T12]  __device_attach+0x217/0x360
[   47.956911][   T12]  ? device_bind_driver+0xd0/0xd0
[   47.961914][   T12]  ? kobject_uevent_env+0x29e/0x1150
[   47.967223][   T12]  ? kobject_uevent_env+0x2a8/0x1150
[   47.972520][   T12]  bus_probe_device+0x1e4/0x290
[   47.977383][   T12]  ? blocking_notifier_call_chain+0x54/0xa0
[   47.983271][   T12]  device_add+0xae6/0x16f0
[   47.987677][   T12]  ? uevent_store+0x50/0x50
[   47.992162][   T12]  ? _raw_spin_unlock_irqrestore+0x3e/0x50
[   47.997969][   T12]  usb_set_configuration+0xdf6/0x1670
[   48.003322][   T12]  generic_probe+0x9d/0xd5
[   48.007723][   T12]  usb_probe_device+0x99/0x100
[   48.012476][   T12]  ? usb_suspend+0x620/0x620
[   48.017086][   T12]  really_probe+0x281/0x660
[   48.021675][   T12]  driver_probe_device+0x104/0x210
[   48.026780][   T12]  __device_attach_driver+0x1c2/0x220
[   48.032141][   T12]  ? driver_allows_async_probing+0x160/0x160
[   48.038165][   T12]  bus_for_each_drv+0x15c/0x1e0
[   48.043068][   T12]  ? bus_rescan_devices+0x20/0x20
[   48.048124][   T12]  ? _raw_spin_unlock_irqrestore+0x3e/0x50
[   48.053965][   T12]  ? lockdep_hardirqs_on+0x379/0x580
[   48.059288][   T12]  __device_attach+0x217/0x360
[   48.064068][   T12]  ? device_bind_driver+0xd0/0xd0
[   48.069080][   T12]  ? kobject_uevent_env+0x29e/0x1150
[   48.074354][   T12]  ? kobject_uevent_env+0x2a8/0x1150
[   48.079622][   T12]  bus_probe_device+0x1e4/0x290
[   48.084573][   T12]  ? blocking_notifier_call_chain+0x54/0xa0
[   48.090556][   T12]  device_add+0xae6/0x16f0
[   48.095047][   T12]  ? uevent_store+0x50/0x50
[   48.099580][   T12]  usb_new_device.cold+0x8c1/0x1016
[   48.104771][   T12]  ? usb_port_suspend+0xa40/0xa40
[   48.109784][   T12]  ? mark_held_locks+0x9f/0xe0
[   48.114527][   T12]  ? _raw_spin_unlock_irq+0x24/0x30
[   48.119720][   T12]  hub_event+0x1ada/0x3590
[   48.124126][   T12]  ? hub_port_debounce+0x260/0x260
[   48.129225][   T12]  process_one_work+0x905/0x1570
[   48.134139][   T12]  ? pwq_dec_nr_in_flight+0x310/0x310
[   48.139494][   T12]  ? do_raw_spin_lock+0x11a/0x280
[   48.144503][   T12]  worker_thread+0x96/0xe20
[   48.148995][   T12]  ? process_one_work+0x1570/0x1570
[   48.154181][   T12]  kthread+0x30b/0x410
[   48.158231][   T12]  ? kthread_park+0x1a0/0x1a0
[   48.162883][   T12]  ret_from_fork+0x24/0x30
[   48.167813][   T12] Kernel Offset: disabled
[   48.172173][   T12] Rebooting in 86400 seconds..