[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 14.124715][ 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 '10.128.0.76' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.120091][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 39.359639][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 39.479723][ T83] usb 1-1: config 0 has an invalid interface number: 234 but max is 0 [ 39.487970][ T83] usb 1-1: config 0 has no interface number 0 [ 39.494237][ T83] usb 1-1: config 0 interface 234 altsetting 0 bulk endpoint 0xF has invalid maxpacket 0 [ 39.504079][ T83] usb 1-1: config 0 interface 234 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 0 [ 39.514008][ T83] usb 1-1: New USB device found, idVendor=10cf, idProduct=5502, bcdDevice=7e.4e [ 39.523033][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.532183][ T83] usb 1-1: config 0 descriptor?? [ 39.573887][ T83] kasan: CONFIG_KASAN_INLINE enabled [ 39.579315][ T83] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.587421][ T83] general protection fault: 0000 [#1] SMP KASAN [ 39.593654][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.3.0+ #0 [ 39.600650][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.610684][ T83] Workqueue: usb_hub_wq hub_event [ 39.615680][ T83] RIP: 0010:vmk80xx_write_packet+0x75/0x260 [ 39.621639][ T83] Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00 [ 39.641252][ T83] RSP: 0018:ffff8881d93df268 EFLAGS: 00010202 [ 39.647322][ T83] RAX: dffffc0000000000 RBX: ffff8881d5059cc0 RCX: 0000000000000000 [ 39.655264][ T83] RDX: 0000000000000002 RSI: ffffffff84710fe3 RDI: ffff8881d5059d28 [ 39.663208][ T83] RBP: ffff8881d3570780 R08: ffff8881d921e000 R09: 0000000000000010 [ 39.671150][ T83] R10: fffffbfff11b35b4 R11: ffffffff88d9ada7 R12: ffff8881d90a6600 [ 39.679125][ T83] R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881d40e8de8 [ 39.687098][ T83] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 39.696022][ T83] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.702574][ T83] CR2: 00007f8aec60a000 CR3: 00000001c68ec000 CR4: 00000000001406e0 [ 39.710524][ T83] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.718473][ T83] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.726432][ T83] Call Trace: [ 39.729703][ T83] vmk80xx_auto_attach+0x13b1/0x17c0 [ 39.734962][ T83] comedi_auto_config+0x16e/0x240 [ 39.739963][ T83] usb_probe_interface+0x305/0x7a0 [ 39.745047][ T83] ? usb_probe_device+0x100/0x100 [ 39.750041][ T83] really_probe+0x281/0x6d0 [ 39.754517][ T83] driver_probe_device+0x101/0x1b0 [ 39.759601][ T83] __device_attach_driver+0x1c2/0x220 [ 39.764941][ T83] ? driver_allows_async_probing+0x160/0x160 [ 39.770893][ T83] bus_for_each_drv+0x162/0x1e0 [ 39.775745][ T83] ? bus_rescan_devices+0x20/0x20 [ 39.780744][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 39.786519][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 39.791774][ T83] __device_attach+0x217/0x360 [ 39.796507][ T83] ? device_bind_driver+0xd0/0xd0 [ 39.801501][ T83] ? kobject_uevent_env+0x29e/0x1150 [ 39.806753][ T83] ? kobject_uevent_env+0x2a8/0x1150 [ 39.812005][ T83] bus_probe_device+0x1e4/0x290 [ 39.816824][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 39.822747][ T83] device_add+0xae6/0x16f0 [ 39.827134][ T83] ? uevent_store+0x50/0x50 [ 39.831639][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 39.837412][ T83] usb_set_configuration+0xdf6/0x1670 [ 39.842754][ T83] generic_probe+0x9d/0xd5 [ 39.847142][ T83] usb_probe_device+0x99/0x100 [ 39.851877][ T83] ? usb_suspend+0x620/0x620 [ 39.856442][ T83] really_probe+0x281/0x6d0 [ 39.860916][ T83] driver_probe_device+0x101/0x1b0 [ 39.865999][ T83] __device_attach_driver+0x1c2/0x220 [ 39.871402][ T83] ? driver_allows_async_probing+0x160/0x160 [ 39.877447][ T83] bus_for_each_drv+0x162/0x1e0 [ 39.882273][ T83] ? bus_rescan_devices+0x20/0x20 [ 39.887271][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 39.893051][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 39.898359][ T83] __device_attach+0x217/0x360 [ 39.903119][ T83] ? device_bind_driver+0xd0/0xd0 [ 39.908122][ T83] ? kobject_uevent_env+0x29e/0x1150 [ 39.913378][ T83] ? kobject_uevent_env+0x2a8/0x1150 [ 39.918633][ T83] bus_probe_device+0x1e4/0x290 [ 39.923482][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 39.929345][ T83] device_add+0xae6/0x16f0 [ 39.933732][ T83] ? uevent_store+0x50/0x50 [ 39.938208][ T83] usb_new_device.cold+0x6a4/0xe79 [ 39.943286][ T83] hub_event+0x1b5c/0x3640 [ 39.947672][ T83] ? hub_port_debounce+0x260/0x260 [ 39.952754][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 39.958266][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 39.963522][ T83] process_one_work+0x92b/0x1530 [ 39.968430][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 39.973769][ T83]