[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.159771][ 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 '10.128.0.128' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.175107][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 45.414606][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 45.534676][ T83] usb 1-1: config index 0 descriptor too short (expected 51150, got 70) [ 45.543135][ T83] usb 1-1: config 0 contains an unexpected descriptor of type 0x2, skipping [ 45.551982][ T83] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 45.562110][ T83] usb 1-1: config 0 interface 0 altsetting 0 has 0 endpoint descriptors, different from the interface descriptor's value: 16 [ 45.575086][ T83] usb 1-1: New USB device found, idVendor=0bd3, idProduct=0755, bcdDevice=69.f1 [ 45.584103][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 45.593320][ T83] usb 1-1: config 0 descriptor?? executing program [ 45.885225][ T83] usb 1-1: string descriptor 0 read error: -71 [ 45.891516][ T83] uvcvideo: Found UVC 0.00 device (0bd3:0755) [ 45.898596][ T83] ------------[ cut here ]------------ [ 45.904051][ T83] list_add double add: new=ffff8881d1d6c810, prev=ffff8881d1d6c810, next=ffff8881d403ae18. [ 45.914139][ T83] WARNING: CPU: 1 PID: 83 at lib/list_debug.c:29 __list_add_valid+0xb4/0xf0 [ 45.922980][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 45.929607][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.5.0-rc2-syzkaller #0 [ 45.937730][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.947778][ T83] Workqueue: usb_hub_wq hub_event [ 45.952779][ T83] Call Trace: [ 45.956049][ T83] dump_stack+0xef/0x16e [ 45.960268][ T83] ? __list_add_valid+0x20/0xf0 [ 45.965091][ T83] panic+0x2aa/0x6e1 [ 45.968969][ T83] ? add_taint.cold+0x16/0x16 [ 45.973625][ T83] ? __probe_kernel_read+0x188/0x1d0 [ 45.978980][ T83] ? __warn.cold+0x14/0x30 [ 45.983387][ T83] ? __warn+0xd5/0x1c8 [ 45.987442][ T83] ? __list_add_valid+0xb4/0xf0 [ 45.992269][ T83] __warn.cold+0x2f/0x30 [ 45.996487][ T83] ? __list_add_valid+0xb4/0xf0 [ 46.001331][ T83] report_bug+0x27b/0x2f0 [ 46.005652][ T83] do_error_trap+0x12b/0x1e0 [ 46.010268][ T83] ? __list_add_valid+0xb4/0xf0 [ 46.015097][ T83] do_invalid_op+0x32/0x40 [ 46.019504][ T83] ? __list_add_valid+0xb4/0xf0 [ 46.024401][ T83] invalid_op+0x23/0x30 [ 46.028545][ T83] RIP: 0010:__list_add_valid+0xb4/0xf0 [ 46.033991][ T83] Code: 48 c7 c7 60 f2 da 85 4c 89 e6 e8 ef cf 2b ff 0f 0b 31 c0 eb c5 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 f2 da 85 e8 d4 cf 2b ff <0f> 0b 31 c0 eb aa 48 89 34 24 e8 cd 3c 7f ff 48 8b 34 24 e9 60 ff [ 46.053662][ T83] RSP: 0018:ffff8881d8aef080 EFLAGS: 00010286 [ 46.059725][ T83] RAX: 0000000000000000 RBX: ffff8881d1d6c810 RCX: 0000000000000000 [ 46.067726][ T83] RDX: 0000000000000000 RSI: ffffffff81295dad RDI: ffffed103b15de02 [ 46.075677][ T83] RBP: ffff8881d1d6c810 R08: ffff8881d8ae0000 R09: fffffbfff11f20b6 [ 46.083636][ T83] R10: fffffbfff11f20b5 R11: ffffffff88f905af R12: ffff8881d403ae18 [ 46.091584][ T83] R13: ffff8881d1d6c800 R14: dffffc0000000000 R15: ffff8881d403ae18 [ 46.099543][ T83] ? vprintk_func+0x7d/0x113 [ 46.104124][ T83] uvc_scan_chain_forward.isra.0+0x4df/0x637 [ 46.110082][ T83] uvc_probe.cold+0x1aee/0x29de [ 46.114911][ T83] ? mark_lock+0xbc/0x1160 [ 46.119314][ T83] ? mark_lock+0xbc/0x1160 [ 46.123707][ T83] ? mark_held_locks+0x9f/0xe0 [ 46.128447][ T83] ? usb_probe_interface+0x305/0x7a0 [ 46.133736][ T83] usb_probe_interface+0x305/0x7a0 [ 46.138825][ T83] ? usb_probe_device+0x100/0x100 [ 46.143827][ T83] really_probe+0x281/0x6d0 [ 46.148311][ T83] driver_probe_device+0x104/0x210 [ 46.153404][ T83] __device_attach_driver+0x1c2/0x220 [ 46.158762][ T83] ? driver_allows_async_probing+0x160/0x160 [ 46.164726][ T83] bus_for_each_drv+0x162/0x1e0 [ 46.169570][ T83] ? bus_rescan_devices+0x20/0x20 [ 46.174585][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.180380][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 46.185645][ T83] __device_attach+0x217/0x360 [ 46.190395][ T83] ? device_bind_driver+0xd0/0xd0 [ 46.195395][ T83] bus_probe_device+0x1e4/0x290 [ 46.200221][ T83] device_add+0x1480/0x1c20 [ 46.204703][ T83] ? wait_for_completion+0x3c0/0x3c0 [ 46.209974][ T83] ? device_links_flush_sync_list+0x350/0x350 [ 46.216034][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.221828][ T83] usb_set_configuration+0xe67/0x1740 [ 46.227216][ T83] generic_probe+0x9d/0xd5 [ 46.231704][ T83] usb_probe_device+0x99/0x100 [ 46.236469][ T83] ? usb_suspend+0x620/0x620 [ 46.241046][ T83] really_probe+0x281/0x6d0 [ 46.245531][ T83] driver_probe_device+0x104/0x210 [ 46.250658][ T83] __device_attach_driver+0x1c2/0x220 [ 46.256059][ T83] ? driver_allows_async_probing+0x160/0x160 [ 46.262121][ T83] bus_for_each_drv+0x162/0x1e0 [ 46.266951][ T83] ? bus_rescan_devices+0x20/0x20 [ 46.271993][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.277817][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 46.283081][ T83] __device_attach+0x217/0x360 [ 46.287829][ T83] ? device_bind_driver+0xd0/0xd0 [ 46.292871][ T83] bus_probe_device+0x1e4/0x290 [ 46.297700][ T83] device_add+0x1480/0x1c20 [ 46.302181][ T83] ? device_links_flush_sync_list+0x350/0x350 [ 46.308222][ T83] usb_new_device.cold+0x6a4/0xe79 [ 46.313407][ T83] hub_event+0x1e59/0x3860 [ 46.317812][ T83] ? hub_port_debounce+0x260/0x260 [ 46.322909][ T83] ? find_held_lock+0x2d/0x110 [ 46.327674][ T83] ? mark_held_locks+0xe0/0xe0 [ 46.332427][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 46.337957][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 46.343225][ T83] process_one_work+0x92b/0x1530 [ 46.348152][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 46.353504][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 46.358517][ T83] worker_thread+0x96/0xe20 [ 46.363007][ T83] ? process_one_work+0x1530/0x1530 [ 46.368261][ T83] kthread+0x318/0x420 [ 46.372331][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 46.377702][ T83] ret_from_fork+0x24/0x30 [ 46.382801][ T83] Kernel Offset: disabled [ 46.387169][ T83] Rebooting in 86400 seconds..