[ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.828222][ T5] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 52.208529][ T5] usb 1-1: config 0 has an invalid interface number: 108 but max is 0 [ 52.216991][ T5] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 52.228756][ T5] usb 1-1: config 0 has no interface number 0 [ 52.234995][ T5] usb 1-1: config 0 interface 108 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 52.247561][ T5] usb 1-1: New USB device found, idVendor=2040, idProduct=8265, bcdDevice=2f.86 [ 52.258111][ T5] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.273463][ T5] usb 1-1: config 0 descriptor?? [ 52.322166][ T5] em28xx 1-1:0.108: New device @ 480 Mbps (2040:8265, interface 108, class 108) [ 52.332527][ T5] em28xx 1-1:0.108: Audio interface 108 found (Vendor Class) executing program [ 52.578243][ T5] em28xx 1-1:0.108: unknown em28xx chip ID (0) [ 52.608022][ T5] em28xx 1-1:0.108: Config register raw data: 0xfffffffb [ 52.638170][ T5] em28xx 1-1:0.108: AC97 chip type couldn't be determined [ 52.645406][ T5] em28xx 1-1:0.108: No AC97 audio processor [ 52.651992][ T5] em28xx 1-1:0.108: We currently don't support analog TV or stream capture on dual tuners. [ 52.798204][ T5] em28xx 1-1:0.108: unknown em28xx chip ID (0) [ 52.818647][ T5] em28xx 1-1:0.108: Config register raw data: 0xfffffffb [ 52.838022][ T5] em28xx 1-1:0.108: AC97 chip type couldn't be determined [ 52.845167][ T5] em28xx 1-1:0.108: No AC97 audio processor [ 53.094522][ T5] usb 1-1: USB disconnect, device number 2 [ 53.102701][ T5] em28xx 1-1:0.108: Disconnecting em28xx #1 [ 53.113554][ T5] em28xx 1-1:0.108: Disconnecting em28xx [ 53.123768][ T5] em28xx 1-1:0.108: Freeing device [ 53.130399][ T5] em28xx 1-1:0.108: Freeing device [ 53.517659][ T5] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 53.907767][ T5] usb 1-1: config 0 has an invalid interface number: 108 but max is 0 [ 53.916065][ T5] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 53.928126][ T5] usb 1-1: config 0 has no interface number 0 [ 53.934232][ T5] usb 1-1: config 0 interface 108 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 53.946911][ T5] usb 1-1: New USB device found, idVendor=2040, idProduct=8265, bcdDevice=2f.86 [ 53.956837][ T5] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 53.968311][ T5] usb 1-1: config 0 descriptor?? [ 54.010817][ T5] em28xx 1-1:0.108: New device @ 480 Mbps (2040:8265, interface 108, class 108) [ 54.021230][ T5] em28xx 1-1:0.108: Audio interface 108 found (Vendor Class) executing program [ 54.267792][ T5] em28xx 1-1:0.108: unknown em28xx chip ID (0) [ 54.287709][ T5] em28xx 1-1:0.108: Config register raw data: 0xfffffffb [ 54.308191][ T5] em28xx 1-1:0.108: AC97 chip type couldn't be determined [ 54.315665][ T5] em28xx 1-1:0.108: No AC97 audio processor [ 54.326665][ T5] list_add corruption. prev->next should be next (ffffffff8d430ee0), but was ffffffff85ca68b8. (prev=ffff88801cdc4250). [ 54.340317][ T5] ------------[ cut here ]------------ [ 54.346049][ T5] kernel BUG at lib/list_debug.c:28! [ 54.352335][ T5] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 54.358392][ T5] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.14.0-rc2-syzkaller #0 [ 54.366957][ T5] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.376997][ T5] Workqueue: usb_hub_wq hub_event [ 54.382020][ T5] RIP: 0010:__list_add_valid+0xb6/0xc0 [ 54.387465][ T5] Code: 48 c7 c7 a0 79 93 8a 4c 89 e6 4c 89 f1 31 c0 e8 28 b3 5b fd 0f 0b 48 c7 c7 60 7a 93 8a 4c 89 f6 4c 89 e1 31 c0 e8 12 b3 5b fd <0f> 0b 0f 1f 84 00 00 00 00 00 41 57 41 56 41 54 53 49 89 fe 49 bc [ 54.407138][ T5] RSP: 0018:ffffc90000ca66e8 EFLAGS: 00010246 [ 54.413208][ T5] RAX: 0000000000000075 RBX: ffffffff8d430ee8 RCX: de978ae683561100 [ 54.421191][ T5] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 54.429146][ T5] RBP: dffffc0000000000 R08: ffffffff81663b82 R09: ffffed1017389798 [ 54.437153][ T5] R10: ffffed1017389798 R11: 0000000000000000 R12: ffff88801cdc4250 [ 54.445105][ T5] R13: dffffc0000000000 R14: ffffffff8d430ee0 R15: ffff8880149bc250 [ 54.453783][ T5] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 54.462808][ T5] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.469392][ T5] CR2: 00007fdd3e5a6740 CR3: 000000002c61d000 CR4: 00000000001506f0 [ 54.477353][ T5] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.485397][ T5] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.493368][ T5] Call Trace: [ 54.496635][ T5] em28xx_init_extension+0x52/0x1d0 [ 54.501822][ T5] em28xx_init_dev+0x8e9/0x2b40 [ 54.506658][ T5] ? lockdep_unregister_key+0x570/0x570 [ 54.512430][ T5] ? em28xx_usb_resume+0x50/0x50 [ 54.517616][ T5] ? lockdep_softirqs_off+0x410/0x410 [ 54.522968][ T5] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.529044][ T5] ? em28xx_usb_probe+0x237/0x2fc0 [ 54.534338][ T5] em28xx_usb_probe+0x15b1/0x2fc0 [ 54.539364][ T5] usb_probe_interface+0x633/0xb40 [ 54.544655][ T5] ? usb_register_driver+0x3d0/0x3d0 [ 54.549944][ T5] call_driver_probe+0x96/0x250 [ 54.554798][ T5] really_probe+0x223/0x9c0 [ 54.559290][ T5] __driver_probe_device+0x1f8/0x3e0 [ 54.564576][ T5] driver_probe_device+0x50/0x240 [ 54.569586][ T5] __device_attach_driver+0x1e1/0x3b0 [ 54.574941][ T5] ? deferred_probe_work_func+0x240/0x240 [ 54.580649][ T5] bus_for_each_drv+0x16a/0x1f0 [ 54.585508][ T5] ? _raw_spin_lock+0x40/0x40 [ 54.590187][ T5] ? subsys_find_device_by_id+0x320/0x320 [ 54.596079][ T5] __device_attach+0x301/0x560 [ 54.600860][ T5] ? kobject_uevent_env+0x335/0x1700 [ 54.606303][ T5] ? device_attach+0x20/0x20 [ 54.610881][ T5] ? kobject_uevent_env+0x335/0x1700 [ 54.616246][ T5] bus_probe_device+0xb8/0x1f0 [ 54.621008][ T5] ? device_add+0x10df/0x1790 [ 54.625840][ T5] device_add+0x1295/0x1790 [ 54.630330][ T5] ? mutex_lock_io_nested+0x60/0x60 [ 54.635540][ T5] ? virtual_device_parent+0x50/0x50 [ 54.640899][ T5] ? usb_enable_lpm+0x75/0x4c0 [ 54.645671][ T5] usb_set_configuration+0x1a86/0x2100 [ 54.651133][ T5] usb_generic_driver_probe+0x83/0x140 [ 54.656581][ T5] usb_probe_device+0x13a/0x260 [ 54.661429][ T5] ? usb_register_device_driver+0x240/0x240 [ 54.667302][ T5] call_driver_probe+0x96/0x250 [ 54.672158][ T5] really_probe+0x223/0x9c0 [ 54.676728][ T5] __driver_probe_device+0x1f8/0x3e0 [ 54.682085][ T5] driver_probe_device+0x50/0x240 [ 54.687090][ T5] __device_attach_driver+0x1e1/0x3b0 [ 54.692445][ T5] ? deferred_probe_work_func+0x240/0x240 [ 54.698151][ T5] bus_for_each_drv+0x16a/0x1f0 [ 54.703180][ T5] ? _raw_spin_lock+0x40/0x40 [ 54.708109][ T5] ? subsys_find_device_by_id+0x320/0x320 [ 54.714123][ T5] __device_attach+0x301/0x560 [ 54.719450][ T5] ? kobject_uevent_env+0x335/0x1700 [ 54.726515][ T5] ? device_attach+0x20/0x20 [ 54.732305][ T5] ? kobject_uevent_env+0x335/0x1700 [ 54.738762][ T5] bus_probe_device+0xb8/0x1f0 [ 54.745491][ T5] ? device_add+0x10df/0x1790 [ 54.750305][ T5] device_add+0x1295/0x1790 [ 54.754812][ T5] ? virtual_device_parent+0x50/0x50 [ 54.760091][ T5] usb_new_device+0x108a/0x1940 [ 54.764937][ T5] ? usb_disconnect+0x8a0/0x8a0 [ 54.769768][ T5] ? _raw_spin_unlock_irq+0x1f/0x40 [ 54.774946][ T5] ? lockdep_hardirqs_on+0x8d/0x130 [ 54.780127][ T5] hub_port_connect+0x1055/0x27a0 [ 54.785229][ T5] ? descriptors_changed+0x9f0/0x9f0 [ 54.790494][ T5] ? slab_free_freelist_hook+0x1d8/0x290 [ 54.796109][ T5] hub_port_connect_change+0x5d0/0xbf0 [ 54.801576][ T5] ? hub_port_reset+0x11b0/0x11b0 [ 54.806598][ T5] ? hub_ext_port_status+0x470/0x670 [ 54.811880][ T5] ? hub_handle_remote_wakeup+0x18d/0x3f0 [ 54.817589][ T5] port_event+0xaee/0x1140 [ 54.821993][ T5] ? hub_event+0x47f/0xd80 [ 54.826411][ T5] ? hub_quiesce+0x330/0x330 [ 54.830982][ T5] ? task_blocks_on_rt_mutex+0x4b1/0xb10 [ 54.836605][ T5] ? lockdep_hardirqs_on+0x8d/0x130 [ 54.841803][ T5] hub_event+0x48d/0xd80 [ 54.846039][ T5] ? led_work+0x710/0x710 [ 54.850789][ T5] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 54.856698][ T5] ? _raw_spin_unlock_irq+0x1f/0x40 [ 54.861879][ T5] process_one_work+0x833/0x10c0 [ 54.866805][ T5] ? worker_detach_from_pool+0x260/0x260 [ 54.872487][ T5] ? _raw_spin_lock_irqsave+0x100/0x100 [ 54.878032][ T5] ? kthread_data+0x4d/0xc0 [ 54.882907][ T5] ? wq_worker_running+0x8b/0x140 [ 54.887942][ T5] worker_thread+0xe28/0x1320 [ 54.892611][ T5] kthread+0x453/0x480 [ 54.896677][ T5] ? rcu_lock_release+0x20/0x20 [ 54.901688][ T5] ? kthread_blkcg+0xd0/0xd0 [ 54.906554][ T5] ret_from_fork+0x1f/0x30 [ 54.910969][ T5] Modules linked in: [ 54.927198][ T5] ---[ end trace 2992d227907d3a06 ]--- [ 54.932678][ T5] RIP: 0010:__list_add_valid+0xb6/0xc0 [ 54.938324][ T5] Code: 48 c7 c7 a0 79 93 8a 4c 89 e6 4c 89 f1 31 c0 e8 28 b3 5b fd 0f 0b 48 c7 c7 60 7a 93 8a 4c 89 f6 4c 89 e1 31 c0 e8 12 b3 5b fd <0f> 0b 0f 1f 84 00 00 00 00 00 41 57 41 56 41 54 53 49 89 fe 49 bc [ 54.958209][ T5] RSP: 0018:ffffc90000ca66e8 EFLAGS: 00010246 [ 54.964278][ T5] RAX: 0000000000000075 RBX: ffffffff8d430ee8 RCX: de978ae683561100 [ 54.972288][ T5] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 54.980440][ T5] RBP: dffffc0000000000 R08: ffffffff81663b82 R09: ffffed1017389798 [ 54.988667][ T5] R10: ffffed1017389798 R11: 0000000000000000 R12: ffff88801cdc4250 [ 54.996673][ T5] R13: dffffc0000000000 R14: ffffffff8d430ee0 R15: ffff8880149bc250 [ 55.004696][ T5] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 55.013674][ T5] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.020481][ T5] CR2: 00007f9f43406710 CR3: 000000002c61d000 CR4: 00000000001506f0 [ 55.028514][ T5] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.036526][ T5] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.044649][ T5] Kernel panic - not syncing: Fatal exception [ 55.052606][ T5] Kernel Offset: disabled [ 55.057345][ T5] Rebooting in 86400 seconds..