[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.377524][ 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.286227][ T22] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 41.526172][ T22] usb 1-1: Using ep0 maxpacket: 8 [ 41.646277][ T22] usb 1-1: config index 0 descriptor too short (expected 51150, got 70) [ 41.654756][ T22] usb 1-1: config 0 has an invalid descriptor of length 36, skipping remainder of the config [ 41.665020][ T22] usb 1-1: New USB device found, idVendor=0bd3, idProduct=0755, bcdDevice=69.6a [ 41.674088][ T22] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 41.683838][ T22] usb 1-1: config 0 descriptor?? executing program [ 41.966374][ T22] usb 1-1: string descriptor 0 read error: -71 [ 41.972662][ T22] uvcvideo: Found UVC 0.00 device (0bd3:0755) [ 41.979774][ T22] ------------[ cut here ]------------ [ 41.985273][ T22] list_add double add: new=ffff8881d0637010, prev=ffff8881d0637010, next=ffff8881d4e87c18. [ 41.995414][ T22] WARNING: CPU: 1 PID: 22 at lib/list_debug.c:29 __list_add_valid+0xb4/0xf0 [ 42.004185][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 42.010934][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.5.0-rc1-syzkaller #0 [ 42.019189][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.029437][ T22] Workqueue: usb_hub_wq hub_event [ 42.034458][ T22] Call Trace: [ 42.037760][ T22] dump_stack+0xef/0x16e [ 42.042121][ T22] ? __list_add_valid+0x20/0xf0 [ 42.046994][ T22] panic+0x2aa/0x6e1 [ 42.050877][ T22] ? add_taint.cold+0x16/0x16 [ 42.055540][ T22] ? __probe_kernel_read+0x188/0x1d0 [ 42.060818][ T22] ? __warn.cold+0x14/0x30 [ 42.065300][ T22] ? __warn+0xd5/0x1c8 [ 42.069365][ T22] ? __list_add_valid+0xb4/0xf0 [ 42.074585][ T22] __warn.cold+0x2f/0x30 [ 42.078822][ T22] ? __list_add_valid+0xb4/0xf0 [ 42.083681][ T22] report_bug+0x27b/0x2f0 [ 42.088008][ T22] do_error_trap+0x12b/0x1e0 [ 42.092583][ T22] ? __list_add_valid+0xb4/0xf0 [ 42.097427][ T22] do_invalid_op+0x32/0x40 [ 42.101890][ T22] ? __list_add_valid+0xb4/0xf0 [ 42.106741][ T22] invalid_op+0x23/0x30 [ 42.110880][ T22] RIP: 0010:__list_add_valid+0xb4/0xf0 [ 42.116324][ T22] Code: 48 c7 c7 e0 f3 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 60 f4 da 85 e8 d4 cf 2b ff <0f> 0b 31 c0 eb aa 48 89 34 24 e8 fd 3c 7f ff 48 8b 34 24 e9 60 ff [ 42.135949][ T22] RSP: 0018:ffff8881d8c37080 EFLAGS: 00010286 [ 42.142008][ T22] RAX: 0000000000000000 RBX: ffff8881d0637010 RCX: 0000000000000000 [ 42.149973][ T22] RDX: 0000000000000000 RSI: ffffffff81295dad RDI: ffffed103b186e02 [ 42.157932][ T22] RBP: ffff8881d0637010 R08: ffff8881da24e200 R09: fffffbfff11f1eae [ 42.165888][ T22] R10: fffffbfff11f1ead R11: ffffffff88f8f56f R12: ffff8881d4e87c18 [ 42.173843][ T22] R13: ffff8881d0637000 R14: dffffc0000000000 R15: ffff8881d4e87c18 [ 42.181839][ T22] ? vprintk_func+0x7d/0x113 [ 42.186421][ T22] uvc_scan_chain_forward.isra.0+0x4df/0x637 [ 42.192736][ T22] uvc_probe.cold+0x1aee/0x29de [ 42.197584][ T22] ? mark_lock+0xbc/0x1160 [ 42.201984][ T22] ? mark_lock+0xbc/0x1160 [ 42.206384][ T22] ? mark_held_locks+0x9f/0xe0 [ 42.211132][ T22] ? usb_probe_interface+0x305/0x7a0 [ 42.216405][ T22] usb_probe_interface+0x305/0x7a0 [ 42.221502][ T22] ? usb_probe_device+0x100/0x100 [ 42.226527][ T22] really_probe+0x281/0x6d0 [ 42.231012][ T22] driver_probe_device+0x104/0x210 [ 42.236108][ T22] __device_attach_driver+0x1c2/0x220 [ 42.241478][ T22] ? driver_allows_async_probing+0x160/0x160 [ 42.247443][ T22] bus_for_each_drv+0x162/0x1e0 [ 42.252309][ T22] ? bus_rescan_devices+0x20/0x20 [ 42.257338][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 42.263217][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 42.268493][ T22] __device_attach+0x217/0x360 [ 42.273244][ T22] ? device_bind_driver+0xd0/0xd0 [ 42.278278][ T22] bus_probe_device+0x1e4/0x290 [ 42.283125][ T22] device_add+0x1480/0x1c20 [ 42.287799][ T22] ? wait_for_completion+0x3c0/0x3c0 [ 42.293176][ T22] ? device_links_flush_sync_list+0x350/0x350 [ 42.299239][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 42.305052][ T22] usb_set_configuration+0xe67/0x1740 [ 42.310919][ T22] generic_probe+0x9d/0xd5 [ 42.315338][ T22] usb_probe_device+0x99/0x100 [ 42.320104][ T22] ? usb_suspend+0x620/0x620 [ 42.324702][ T22] really_probe+0x281/0x6d0 [ 42.329223][ T22] driver_probe_device+0x104/0x210 [ 42.334335][ T22] __device_attach_driver+0x1c2/0x220 [ 42.339697][ T22] ? driver_allows_async_probing+0x160/0x160 [ 42.345785][ T22] bus_for_each_drv+0x162/0x1e0 [ 42.350633][ T22] ? bus_rescan_devices+0x20/0x20 [ 42.355647][ T22] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 42.361552][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 42.366830][ T22] __device_attach+0x217/0x360 [ 42.371582][ T22] ? device_bind_driver+0xd0/0xd0 [ 42.376604][ T22] bus_probe_device+0x1e4/0x290 [ 42.381454][ T22] device_add+0x1480/0x1c20 [ 42.385950][ T22] ? device_links_flush_sync_list+0x350/0x350 [ 42.392019][ T22] usb_new_device.cold+0x6a4/0xe79 [ 42.397159][ T22] hub_event+0x1e59/0x3860 [ 42.402611][ T22] ? hub_port_debounce+0x260/0x260 [ 42.407709][ T22] ? find_held_lock+0x2d/0x110 [ 42.412516][ T22] ? mark_held_locks+0xe0/0xe0 [ 42.417402][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 42.422941][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 42.428330][ T22] process_one_work+0x92b/0x1530 [ 42.433253][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 42.438693][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 42.443759][ T22] worker_thread+0x96/0xe20 [ 42.448361][ T22] ? process_one_work+0x1530/0x1530 [ 42.453653][ T22] kthread+0x318/0x420 [ 42.457721][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 42.463080][ T22] ret_from_fork+0x24/0x30 [ 42.468350][ T22] Kernel Offset: disabled [ 42.472711][ T22] Rebooting in 86400 seconds..