Warning: Permanently added '10.128.0.245' (ECDSA) to the list of known hosts. executing program [ 25.138551][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.228330][ T83] usb 1-1: Using ep0 maxpacket: 32 [ 25.348168][ T83] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 25.518162][ T83] usb 1-1: New USB device found, idVendor=18cd, idProduct=cafe, bcdDevice=99.e3 [ 25.527327][ T83] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 25.535602][ T83] usb 1-1: Product: syz [ 25.539826][ T83] usb 1-1: Manufacturer: syz [ 25.544425][ T83] usb 1-1: SerialNumber: syz [ 25.550948][ T83] usb 1-1: config 0 descriptor?? [ 25.590058][ T83] uvcvideo: Found UVC 0.00 device syz (18cd:cafe) [ 25.596589][ T83] list_add double add: new=ffff8881cdd57010, prev=ffff8881cdd57010, next=ffff8881d4dc3a18. [ 25.606745][ T83] ------------[ cut here ]------------ [ 25.612255][ T83] kernel BUG at lib/list_debug.c:29! [ 25.617620][ T83] invalid opcode: 0000 [#1] SMP KASAN [ 25.623039][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.5.0-rc6-syzkaller #0 [ 25.631167][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.641214][ T83] Workqueue: usb_hub_wq hub_event [ 25.646233][ T83] RIP: 0010:__list_add_valid.cold+0x26/0x3c [ 25.652112][ T83] Code: 57 ff ff ff 4c 89 e1 48 c7 c7 60 fb fb 85 e8 1b 17 40 ff 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 a0 fc fb 85 e8 04 17 40 ff <0f> 0b 48 89 f1 48 c7 c7 20 fc fb 85 4c 89 e6 e8 f0 16 40 ff 0f 0b [ 25.671851][ T83] RSP: 0018:ffff8881d8b0f080 EFLAGS: 00010286 [ 25.677906][ T83] RAX: 0000000000000058 RBX: ffff8881cdd57010 RCX: 0000000000000000 [ 25.685867][ T83] RDX: 0000000000000000 RSI: ffffffff8129598d RDI: ffffed103b161e02 [ 25.693894][ T83] RBP: ffff8881cdd57010 R08: 0000000000000058 R09: fffffbfff1269cae [ 25.701922][ T83] R10: fffffbfff1269cad R11: ffffffff8934e56f R12: ffff8881d4dc3a18 [ 25.709882][ T83] R13: ffff8881cdd57000 R14: dffffc0000000000 R15: ffff8881d4dc3a18 [ 25.717831][ T83] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 25.726733][ T83] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.733292][ T83] CR2: 00007f5b92c06000 CR3: 00000001ced22000 CR4: 00000000001406e0 [ 25.741239][ T83] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.749361][ T83] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.757319][ T83] Call Trace: [ 25.760594][ T83] uvc_scan_chain_forward.isra.0+0x4df/0x637 [ 25.766604][ T83] uvc_probe.cold+0x1aee/0x29de [ 25.771442][ T83] ? mark_lock+0xbc/0x1160 [ 25.775963][ T83] ? mark_lock+0xbc/0x1160 [ 25.780364][ T83] ? mark_held_locks+0x9f/0xe0 [ 25.785148][ T83] ? usb_probe_interface+0x310/0x800 [ 25.790423][ T83] usb_probe_interface+0x310/0x800 [ 25.795542][ T83] ? usb_probe_device+0x140/0x140 [ 25.800561][ T83] really_probe+0x290/0xad0 [ 25.805086][ T83] driver_probe_device+0x223/0x350 [ 25.810187][ T83] __device_attach_driver+0x1d1/0x290 [ 25.815545][ T83] ? driver_allows_async_probing+0x160/0x160 [ 25.821556][ T83] bus_for_each_drv+0x162/0x1e0 [ 25.826407][ T83] ? bus_rescan_devices+0x20/0x20 [ 25.831582][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 25.837391][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 25.842760][ T83] __device_attach+0x217/0x390 [ 25.847578][ T83] ? device_bind_driver+0xd0/0xd0 [ 25.852684][ T83] bus_probe_device+0x1e4/0x290 [ 25.857586][ T83] device_add+0x1459/0x1bf0 [ 25.862076][ T83] ? wait_for_completion+0x3c0/0x3c0 [ 25.867344][ T83] ? device_link_remove+0x110/0x110 [ 25.872526][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 25.878319][ T83] usb_set_configuration+0xe47/0x17d0 [ 25.883719][ T83] generic_probe+0x9d/0xd5 [ 25.888125][ T83] usb_probe_device+0xaf/0x140 [ 25.892879][ T83] ? usb_suspend+0x5f0/0x5f0 [ 25.897451][ T83] really_probe+0x290/0xad0 [ 25.901939][ T83] driver_probe_device+0x223/0x350 [ 25.907034][ T83] __device_attach_driver+0x1d1/0x290 [ 25.912483][ T83] ? driver_allows_async_probing+0x160/0x160 [ 25.918497][ T83] bus_for_each_drv+0x162/0x1e0 [ 25.923334][ T83] ? bus_rescan_devices+0x20/0x20 [ 25.928334][ T83] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 25.934125][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 25.940089][ T83] __device_attach+0x217/0x390 [ 25.944835][ T83] ? device_bind_driver+0xd0/0xd0 [ 25.949839][ T83] bus_probe_device+0x1e4/0x290 [ 25.954704][ T83] device_add+0x1459/0x1bf0 [ 25.959197][ T83] ? device_link_remove+0x110/0x110 [ 25.964381][ T83] usb_new_device.cold+0x540/0xcd0 [ 25.969472][ T83] hub_event+0x21cb/0x4300 [ 25.973876][ T83] ? hub_port_debounce+0x350/0x350 [ 25.978967][ T83] ? find_held_lock+0x2d/0x110 [ 25.983704][ T83] ? mark_held_locks+0xe0/0xe0 [ 25.988441][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 25.993970][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 25.999234][ T83] process_one_work+0x945/0x15c0 [ 26.004174][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.009532][ T83] ? do_raw_spin_lock+0x129/0x290 [ 26.014539][ T83] worker_thread+0x96/0xe20 [ 26.019035][ T83] ? process_one_work+0x15c0/0x15c0 [ 26.024220][ T83] kthread+0x318/0x420 [ 26.028280][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 26.033628][ T83] ret_from_fork+0x24/0x30 [ 26.038020][ T83] Modules linked in: [