[info] Using makefile-style concurrent boot in runlevel 2. [ 15.943820][ C1] random: crng init done [....] 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 '10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.076247][ T17] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 24.316212][ T17] usb 1-1: Using ep0 maxpacket: 8 [ 24.436321][ T17] usb 1-1: config 0 has an invalid interface number: 80 but max is 0 [ 24.444593][ T17] usb 1-1: config 0 has no interface number 0 [ 24.450751][ T17] usb 1-1: config 0 interface 80 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 24.461657][ T17] usb 1-1: config 0 interface 80 altsetting 0 endpoint 0xF has wMaxPacketSize 0, skipping [ 24.471591][ T17] usb 1-1: config 0 interface 80 altsetting 0 endpoint 0x83 has wMaxPacketSize 0, skipping [ 24.481626][ T17] usb 1-1: New USB device found, idVendor=10cf, idProduct=5501, bcdDevice=b9.7f [ 24.492586][ T17] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 24.502126][ T17] usb 1-1: config 0 descriptor?? [ 24.526474][ T1709] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 24.533941][ T1709] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 24.560354][ T17] kasan: CONFIG_KASAN_INLINE enabled [ 24.565786][ T17] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.573991][ T17] general protection fault: 0000 [#1] SMP KASAN [ 24.580388][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.4.0-rc6+ #0 [ 24.587906][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.598124][ T17] Workqueue: usb_hub_wq hub_event [ 24.603130][ T17] RIP: 0010:vmk80xx_write_packet+0x75/0x260 [ 24.608998][ T17] 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 [ 24.628586][ T17] RSP: 0018:ffff8881da267218 EFLAGS: 00010202 [ 24.634634][ T17] RAX: dffffc0000000000 RBX: ffff8881d181c800 RCX: 0000000000000000 [ 24.642666][ T17] RDX: 0000000000000002 RSI: ffffffff846fd233 RDI: ffff8881d181c868 [ 24.650624][ T17] RBP: ffff8881d2065000 R08: ffff8881da24b000 R09: 0000000000000010 [ 24.658584][ T17] R10: fffffbfff11ab3b4 R11: ffffffff88d59da7 R12: ffff8881d0f93000 [ 24.666533][ T17] R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881d181f888 [ 24.674549][ T17] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 24.683455][ T17] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.690015][ T17] CR2: 00007f7804738000 CR3: 00000001d3697000 CR4: 00000000001406e0 [ 24.697963][ T17] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.705911][ T17] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.713957][ T17] Call Trace: [ 24.717229][ T17] vmk80xx_auto_attach+0x13b1/0x17c0 [ 24.722491][ T17] comedi_auto_config+0x16e/0x250 [ 24.727492][ T17] usb_probe_interface+0x305/0x7a0 [ 24.732578][ T17] ? usb_probe_device+0x100/0x100 [ 24.737577][ T17] really_probe+0x281/0x6d0 [ 24.742055][ T17] driver_probe_device+0x104/0x210 [ 24.747154][ T17] __device_attach_driver+0x1c2/0x220 [ 24.752646][ T17] ? driver_allows_async_probing+0x160/0x160 [ 24.758808][ T17] bus_for_each_drv+0x162/0x1e0 [ 24.763643][ T17] ? bus_rescan_devices+0x20/0x20 [ 24.768757][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.774552][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 24.779867][ T17] __device_attach+0x217/0x360 [ 24.784631][ T17] ? device_bind_driver+0xd0/0xd0 [ 24.789829][ T17] ? kobject_uevent_env+0x29e/0x1160 [ 24.795092][ T17] ? kobject_uevent_env+0x2a8/0x1160 [ 24.800364][ T17] bus_probe_device+0x1e4/0x290 [ 24.805195][ T17] ? blocking_notifier_call_chain+0x54/0xa0 [ 24.811074][ T17] device_add+0xae6/0x16f0 [ 24.815464][ T17] ? uevent_store+0x50/0x50 [ 24.819943][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.825740][ T17] usb_set_configuration+0xdf6/0x1670 [ 24.831087][ T17] generic_probe+0x9d/0xd5 [ 24.835508][ T17] usb_probe_device+0x99/0x100 [ 24.840247][ T17] ? usb_suspend+0x620/0x620 [ 24.844810][ T17] really_probe+0x281/0x6d0 [ 24.849291][ T17] driver_probe_device+0x104/0x210 [ 24.854397][ T17] __device_attach_driver+0x1c2/0x220 [ 24.860240][ T17] ? driver_allows_async_probing+0x160/0x160 [ 24.866246][ T17] bus_for_each_drv+0x162/0x1e0 [ 24.871102][ T17] ? bus_rescan_devices+0x20/0x20 [ 24.876108][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.881892][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 24.887251][ T17] __device_attach+0x217/0x360 [ 24.891992][ T17] ? device_bind_driver+0xd0/0xd0 [ 24.896993][ T17] ? kobject_uevent_env+0x29e/0x1160 [ 24.902252][ T17] ? kobject_uevent_env+0x2a8/0x1160 [ 24.907512][ T17] bus_probe_device+0x1e4/0x290 [ 24.912340][ T17] ? blocking_notifier_call_chain+0x54/0xa0 [ 24.918206][ T17] device_add+0xae6/0x16f0 [ 24.923289][ T17] ? uevent_store+0x50/0x50 [ 24.927770][ T17] usb_new_device.cold+0x6a4/0xe79 [ 24.932855][ T17] hub_event+0x1df8/0x3800 [ 24.937244][ T17] ? hub_port_debounce+0x260/0x260 [ 24.942333][ T17] ? find_held_lock+0x2d/0x110 [ 24.947085][ T17] ? mark_held_locks+0xe0/0xe0 [ 24.951840][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 24.957358][ T17] ? rcu_read_lock_bh_held+0xb0/0xb