Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 12.620215][ C1] random: crng init done [ 12.621153][ C1] random: 7 urandom warning(s) missed due to ratelimiting [ 20.394947][ T346] can: request_module (can-proto-0) failed. [ 20.399282][ T346] can: request_module (can-proto-0) failed. [ 20.403301][ T346] can: request_module (can-proto-7) failed. [ 20.408492][ T346] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. 2020/07/28 02:52:50 parsed 1 programs 2020/07/28 02:52:50 executed programs: 0 [ 27.242845][ T484] cgroup: Unknown subsys name 'perf_event' [ 27.243047][ T487] cgroup: Unknown subsys name 'perf_event' [ 27.249118][ T484] cgroup: Unknown subsys name 'net_cls' [ 27.262760][ T486] cgroup: Unknown subsys name 'perf_event' [ 27.263608][ T492] cgroup: Unknown subsys name 'perf_event' [ 27.268731][ T486] cgroup: Unknown subsys name 'net_cls' [ 27.279904][ T487] cgroup: Unknown subsys name 'net_cls' [ 27.280940][ T489] cgroup: Unknown subsys name 'perf_event' [ 27.288754][ T492] cgroup: Unknown subsys name 'net_cls' [ 27.292643][ T491] cgroup: Unknown subsys name 'perf_event' [ 27.304046][ T489] cgroup: Unknown subsys name 'net_cls' [ 27.311036][ T491] cgroup: Unknown subsys name 'net_cls' [ 34.209000][ T57] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 34.318908][ T17] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 34.348885][ T12] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 34.368978][ T3175] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 34.389038][ T3185] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 34.408963][ T69] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 34.458941][ T57] usb 2-1: Using ep0 maxpacket: 32 [ 34.588857][ T12] usb 5-1: Using ep0 maxpacket: 32 [ 34.588906][ T17] usb 1-1: Using ep0 maxpacket: 32 [ 34.599335][ T57] usb 2-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.608482][ T57] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.620619][ T57] usb 2-1: config 0 descriptor?? [ 34.648867][ T69] usb 6-1: Using ep0 maxpacket: 32 [ 34.658894][ T3175] usb 3-1: Using ep0 maxpacket: 32 [ 34.664119][ T3185] usb 4-1: Using ep0 maxpacket: 32 [ 34.708917][ T12] usb 5-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.717999][ T12] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.728213][ T12] usb 5-1: config 0 descriptor?? [ 34.759169][ T17] usb 1-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.768211][ T17] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.768880][ T69] usb 6-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.778228][ T17] usb 1-1: config 0 descriptor?? [ 34.785476][ T69] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.801083][ T69] usb 6-1: config 0 descriptor?? [ 34.808958][ T3175] usb 3-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.818046][ T3175] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.826194][ T3185] usb 4-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.835286][ T3185] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.846582][ T3175] usb 3-1: config 0 descriptor?? [ 34.852526][ T3185] usb 4-1: config 0 descriptor?? [ 34.870622][ T57] hso 2-1:0.0: Failed to find BULK IN ep [ 34.989556][ T12] hso 5-1:0.0: Failed to find BULK IN ep [ 35.049791][ T17] hso 1-1:0.0: Failed to find BULK IN ep [ 35.069570][ T69] hso 6-1:0.0: Failed to find BULK IN ep [ 35.074525][ T17] usb 2-1: USB disconnect, device number 2 [ 35.129482][ T3185] sysfs: cannot create duplicate filename '/class/tty/ttyHS0' [ 35.137010][ T3185] CPU: 1 PID: 3185 Comm: kworker/1:4 Not tainted 5.8.0-rc7-syzkaller #0 [ 35.145313][ T3185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.155357][ T3185] Workqueue: usb_hub_wq hub_event [ 35.160362][ T3185] Call Trace: [ 35.163644][ T3185] dump_stack+0xf6/0x16e [ 35.167874][ T3185] sysfs_warn_dup.cold+0x1c/0x2d [ 35.172792][ T3185] sysfs_do_create_link_sd+0x11e/0x140 [ 35.178228][ T3185] sysfs_create_link+0x5f/0xc0 [ 35.182973][ T3185] device_add+0x739/0x1c10 [ 35.187389][ T3185] ? lockdep_init_map_waits+0x26a/0x7c0 [ 35.192916][ T3185] ? device_check_offline+0x280/0x280 [ 35.198268][ T3185] ? __init_waitqueue_head+0x97/0x110 [ 35.203624][ T3185] ? pm_runtime_init+0x2cf/0x3b0 [ 35.208554][ T3185] tty_register_device_attr+0x395/0x7b0 [ 35.214078][ T3185] ? put_tty_driver+0xa0/0xa0 [ 35.218747][ T3185] ? mark_held_locks+0x9f/0xe0 [ 35.223500][ T3185] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 35.229309][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 35.235264][ T3185] ? tty_port_register_device_attr+0xbc/0x110 [ 35.241327][ T3185] hso_serial_common_create+0x115/0x790 [ 35.246850][ T3185] ? kasan_unpoison_shadow+0x33/0x40 [ 35.252121][ T3185] hso_probe+0xefa/0x1f61 [ 35.256438][ T3185] usb_probe_interface+0x315/0x7f0 [ 35.261528][ T3185] ? usb_device_match+0x300/0x300 [ 35.266538][ T3185] really_probe+0x291/0xc90 [ 35.269650][ T69] usb 6-1: USB disconnect, device number 2 [ 35.271039][ T3185] driver_probe_device+0x26b/0x3d0 [ 35.271059][ T3185] __device_attach_driver+0x1d1/0x290 [ 35.271072][ T3185] ? driver_allows_async_probing+0x150/0x150 [ 35.271089][ T3185] bus_for_each_drv+0x15f/0x1e0 [ 35.298105][ T3185] ? bus_for_each_dev+0x1d0/0x1d0 [ 35.303129][ T3185] __device_attach+0x28d/0x430 [ 35.307882][ T3185] ? really_probe+0xc90/0xc90 [ 35.312536][ T3185] ? kobject_uevent_env+0x2b4/0x1540 [ 35.317795][ T3185] bus_probe_device+0x1e4/0x290 [ 35.322632][ T3185] device_add+0xb09/0x1c10 [ 35.327040][ T3185] ? device_check_offline+0x280/0x280 [ 35.332411][ T3185] ? trace_hardirqs_on+0x5f/0x200 [ 35.337437][ T3185] usb_set_configuration+0xf05/0x18a0 [ 35.342823][ T3185] usb_generic_driver_probe+0xba/0xf2 [ 35.348262][ T3185] usb_probe_device+0xd9/0x250 [ 35.353005][ T3185] ? usb_driver_release_interface+0x180/0x180 [ 35.359060][ T3185] really_probe+0x291/0xc90 [ 35.363540][ T3185] driver_probe_device+0x26b/0x3d0 [ 35.368633][ T3185] __device_attach_driver+0x1d1/0x290 [ 35.373990][ T3185] ? driver_allows_async_probing+0x150/0x150 [ 35.379954][ T3185] bus_for_each_drv+0x15f/0x1e0 [ 35.384792][ T3185] ? bus_for_each_dev+0x1d0/0x1d0 [ 35.389801][ T3185] __device_attach+0x28d/0x430 [ 35.394554][ T3185] ? really_probe+0xc90/0xc90 [ 35.399227][ T3185] ? kobject_uevent_env+0x2b4/0x1540 [ 35.404489][ T3185] bus_probe_device+0x1e4/0x290 [ 35.409324][ T3185] device_add+0xb09/0x1c10 [ 35.413718][ T3185] ? device_check_offline+0x280/0x280 [ 35.419065][ T3185] ? _raw_spin_unlock_irq+0x1f/0x30 [ 35.424239][ T3185] usb_new_device.cold+0x71d/0xfd4 [ 35.429355][ T3185] ? hub_disconnect+0x510/0x510 [ 35.434184][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 35.440144][ T3185] ? trace_hardirqs_on+0x5f/0x200 [ 35.445248][ T3185] hub_event+0x2361/0x4390 [ 35.449649][ T3185] ? hub_port_debounce+0x3b0/0x3b0 [ 35.454744][ T3185] ? perf_trace_workqueue_execute_start+0x211/0x390 [ 35.461318][ T3185] ? lock_release+0x7e0/0x7e0 [ 35.465970][ T3185] ? lock_downgrade+0x730/0x730 [ 35.470813][ T3185] ? do_raw_spin_lock+0x120/0x260 [ 35.475814][ T3185] ? _raw_spin_unlock_irq+0x1f/0x30 [ 35.481091][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 35.487146][ T3185] process_one_work+0x94c/0x15f0 [ 35.492078][ T3185] ? lock_release+0x7e0/0x7e0 [ 35.496741][ T3185] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 35.502104][ T3185] ? rwlock_bug.part.0+0x90/0x90 [ 35.507030][ T3185] worker_thread+0x64c/0x1120 [ 35.511687][ T3185] ? __kthread_parkme+0x118/0x1d0 [ 35.516706][ T3185] ? process_one_work+0x15f0/0x15f0 [ 35.521885][ T3185] kthread+0x392/0x470 [ 35.525934][ T3185] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 35.531803][ T3185] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 35.537670][ T3185] ret_from_fork+0x1f/0x30 [ 35.543608][ T3175] hso 3-1:0.0: Failed to find BULK IN ep [ 35.549834][ T3185] ------------[ cut here ]------------ [ 35.554395][ T69] usb 1-1: USB disconnect, device number 2 [ 35.555295][ T3185] sysfs group 'power' not found for kobject 'ttyHS0' [ 35.567997][ T3185] WARNING: CPU: 1 PID: 3185 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 [ 35.577325][ T3185] Kernel panic - not syncing: panic_on_warn set ... [ 35.583911][ T3185] CPU: 1 PID: 3185 Comm: kworker/1:4 Not tainted 5.8.0-rc7-syzkaller #0 [ 35.592226][ T3185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.602459][ T3185] Workqueue: usb_hub_wq hub_event [ 35.607471][ T3185] Call Trace: [ 35.610768][ T3185] dump_stack+0xf6/0x16e [ 35.615013][ T3185] panic+0x2aa/0x6e1 [ 35.618913][ T3185] ? __warn_printk+0xf3/0xf3 [ 35.623518][ T3185] ? llist_add_batch+0x6e/0xa0 [ 35.628369][ T3185] ? __warn.cold+0x5/0x50 [ 35.632701][ T3185] ? __warn+0xd6/0x1f2 [ 35.636763][ T3185] ? sysfs_remove_group+0x126/0x170 [ 35.641947][ T3185] __warn.cold+0x20/0x50 [ 35.646182][ T3185] ? sysfs_remove_group+0x126/0x170 [ 35.651360][ T3185] report_bug+0x1bd/0x210 [ 35.655669][ T3185] handle_bug+0x41/0x80 [ 35.659804][ T3185] exc_invalid_op+0x13/0x40 [ 35.664300][ T3185] asm_exc_invalid_op+0x12/0x20 [ 35.669140][ T3185] RIP: 0010:sysfs_remove_group+0x126/0x170 [ 35.674988][ T3185] Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 37 48 8b 33 48 c7 c7 c0 bb 11 86 e8 8c be 82 ff <0f> 0b eb 98 e8 21 0e d8 ff e9 01 ff ff ff 48 89 df e8 14 0e d8 ff [ 35.695011][ T3185] RSP: 0018:ffff8881ccf26f90 EFLAGS: 00010282 [ 35.701060][ T3185] RAX: 0000000000000000 RBX: ffffffff8637a220 RCX: 0000000000000000 [ 35.709015][ T3185] RDX: ffff8881ce330000 RSI: ffffffff8129b763 RDI: ffffed10399e4de4 [ 35.717070][ T3185] RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8881db32f50f [ 35.725039][ T3185] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d2057000 [ 35.735605][ T3185] R13: ffffffff8637a7c0 R14: 0000000000000001 R15: ffff8881d3e11090 [ 35.743568][ T3185] ? vprintk_func+0x93/0x133 [ 35.748165][ T3185] dpm_sysfs_remove+0x97/0xb0 [ 35.752849][ T3185] device_del+0x18b/0xd20 [ 35.757159][ T3185] ? device_link_add_missing_supplier_links+0x370/0x370 [ 35.764130][ T3185] ? put_device+0x1b/0x30 [ 35.768441][ T3185] device_unregister+0x22/0xc0 [ 35.773205][ T3185] device_destroy+0x96/0xd0 [ 35.777715][ T3185] ? root_device_unregister+0x60/0x60 [ 35.783089][ T3185] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 35.788882][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 35.794851][ T3185] tty_unregister_device+0x7e/0x1b0 [ 35.800231][ T3185] hso_serial_common_create+0x40a/0x790 [ 35.805756][ T3185] hso_probe+0xefa/0x1f61 [ 35.810209][ T3185] usb_probe_interface+0x315/0x7f0 [ 35.815303][ T3185] ? usb_device_match+0x300/0x300 [ 35.820306][ T3185] really_probe+0x291/0xc90 [ 35.825052][ T3185] driver_probe_device+0x26b/0x3d0 [ 35.830157][ T3185] __device_attach_driver+0x1d1/0x290 [ 35.835532][ T3185] ? driver_allows_async_probing+0x150/0x150 [ 35.841504][ T3185] bus_for_each_drv+0x15f/0x1e0 [ 35.846334][ T3185] ? bus_for_each_dev+0x1d0/0x1d0 [ 35.851347][ T3185] __device_attach+0x28d/0x430 [ 35.856094][ T3185] ? really_probe+0xc90/0xc90 [ 35.860753][ T3185] ? kobject_uevent_env+0x2b4/0x1540 [ 35.866070][ T3185] bus_probe_device+0x1e4/0x290 [ 35.870912][ T3185] device_add+0xb09/0x1c10 [ 35.875339][ T3185] ? device_check_offline+0x280/0x280 [ 35.880705][ T3185] ? trace_hardirqs_on+0x5f/0x200 [ 35.885711][ T3185] usb_set_configuration+0xf05/0x18a0 [ 35.891073][ T3185] usb_generic_driver_probe+0xba/0xf2 [ 35.896434][ T3185] usb_probe_device+0xd9/0x250 [ 35.901189][ T3185] ? usb_driver_release_interface+0x180/0x180 [ 35.907299][ T3185] really_probe+0x291/0xc90 [ 35.911827][ T3185] driver_probe_device+0x26b/0x3d0 [ 35.916918][ T3185] __device_attach_driver+0x1d1/0x290 [ 35.922281][ T3185] ? driver_allows_async_probing+0x150/0x150 [ 35.928247][ T3185] bus_for_each_drv+0x15f/0x1e0 [ 35.933078][ T3185] ? bus_for_each_dev+0x1d0/0x1d0 [ 35.938099][ T3185] __device_attach+0x28d/0x430 [ 35.942841][ T3185] ? really_probe+0xc90/0xc90 [ 35.947497][ T3185] ? kobject_uevent_env+0x2b4/0x1540 [ 35.954263][ T3185] bus_probe_device+0x1e4/0x290 [ 35.959116][ T3185] device_add+0xb09/0x1c10 [ 35.963521][ T3185] ? device_check_offline+0x280/0x280 [ 35.968875][ T3185] ? _raw_spin_unlock_irq+0x1f/0x30 [ 35.974053][ T3185] usb_new_device.cold+0x71d/0xfd4 [ 35.979157][ T3185] ? hub_disconnect+0x510/0x510 [ 35.983997][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 35.990001][ T3185] ? trace_hardirqs_on+0x5f/0x200 [ 35.995117][ T3185] hub_event+0x2361/0x4390 [ 35.999522][ T3185] ? hub_port_debounce+0x3b0/0x3b0 [ 36.004615][ T3185] ? perf_trace_workqueue_execute_start+0x211/0x390 [ 36.011238][ T3185] ? lock_release+0x7e0/0x7e0 [ 36.015907][ T3185] ? lock_downgrade+0x730/0x730 [ 36.020768][ T3185] ? do_raw_spin_lock+0x120/0x260 [ 36.025790][ T3185] ? _raw_spin_unlock_irq+0x1f/0x30 [ 36.031035][ T3185] ? lockdep_hardirqs_on_prepare+0x370/0x550 [ 36.036993][ T3185] process_one_work+0x94c/0x15f0 [ 36.038477][ T69] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 36.041937][ T3185] ? lock_release+0x7e0/0x7e0 [ 36.041950][ T3185] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 36.041964][ T3185] ? rwlock_bug.part.0+0x90/0x90 [ 36.041976][ T3185] worker_thread+0x64c/0x1120 [ 36.041989][ T3185] ? __kthread_parkme+0x118/0x1d0 [ 36.042004][ T3185] ? process_one_work+0x15f0/0x15f0 [ 36.079226][ T3185] kthread+0x392/0x470 [ 36.083302][ T3185] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 36.089199][ T3185] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 36.095089][ T3185] ret_from_fork+0x1f/0x30 [ 36.100250][ T3185] Kernel Offset: disabled [ 36.104608][ T3185] Rebooting in 86400 seconds..