Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 19.332973][ C1] random: crng init done [ 19.337721][ C1] random: 7 urandom warning(s) missed due to ratelimiting [ 22.984621][ T345] can: request_module (can-proto-0) failed. [ 23.395495][ T345] can: request_module (can-proto-0) failed. [ 23.405136][ T345] can: request_module (can-proto-7) failed. [ 23.415408][ T345] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.10.63' (ECDSA) to the list of known hosts. 2020/04/18 19:50:45 parsed 1 programs 2020/04/18 19:50:46 executed programs: 0 [ 30.725921][ T514] cgroup: Unknown subsys name 'perf_event' [ 30.729654][ T517] cgroup: Unknown subsys name 'perf_event' [ 30.732331][ T514] cgroup: Unknown subsys name 'net_cls' [ 30.745975][ T516] cgroup: Unknown subsys name 'perf_event' [ 30.747712][ T519] cgroup: Unknown subsys name 'perf_event' [ 30.752040][ T516] cgroup: Unknown subsys name 'net_cls' [ 30.759029][ T520] cgroup: Unknown subsys name 'perf_event' [ 30.765703][ T512] cgroup: Unknown subsys name 'perf_event' [ 30.769691][ T517] cgroup: Unknown subsys name 'net_cls' [ 30.777140][ T512] cgroup: Unknown subsys name 'net_cls' [ 30.780920][ T519] cgroup: Unknown subsys name 'net_cls' [ 30.792962][ T520] cgroup: Unknown subsys name 'net_cls' [ 39.101373][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 39.309618][ T12] usb 1-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.318917][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.330237][ T12] usb 1-1: config 0 descriptor?? [ 39.349508][ T167] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 39.357263][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 39.365934][ T21] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 39.389510][ T95] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 39.399587][ T3221] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 39.579567][ T17] usb 4-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.588625][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.597723][ T21] usb 6-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.606900][ T21] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.615128][ T167] usb 5-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.619609][ T95] usb 2-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.624291][ T167] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.633412][ T95] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.649400][ T21] usb 6-1: config 0 descriptor?? [ 39.653258][ T3221] usb 3-1: New USB device found, idVendor=056a, idProduct=0061, bcdDevice= 0.40 [ 39.655081][ T17] usb 4-1: config 0 descriptor?? [ 39.663530][ T3221] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.669750][ T3221] usb 3-1: config 0 descriptor?? [ 39.683871][ T167] usb 5-1: config 0 descriptor?? [ 39.685571][ T95] usb 2-1: config 0 descriptor?? [ 39.822369][ T12] wacom 0003:056A:0061.0001: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 39.834176][ T12] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:056A:0061.0001/input/input5 [ 39.854442][ T12] wacom 0003:056A:0061.0001: hidraw0: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.0-1/input0 [ 40.020883][ T12] usb 1-1: USB disconnect, device number 2 [ 40.030384][ T12] usbhid 1-1:0.0: Stop: 0 0 0 [ 40.131141][ T21] wacom 0003:056A:0061.0002: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 40.142009][ T21] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.5/usb6/6-1/6-1:0.0/0003:056A:0061.0002/input/input8 [ 40.156655][ T167] wacom 0003:056A:0061.0003: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 40.168806][ T21] wacom 0003:056A:0061.0002: hidraw0: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.5-1/input0 [ 40.181959][ T167] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.4/usb5/5-1/5-1:0.0/0003:056A:0061.0003/input/input11 [ 40.191457][ T95] wacom 0003:056A:0061.0004: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 40.197246][ T167] wacom 0003:056A:0061.0003: hidraw1: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.4-1/input0 [ 40.215962][ T3221] wacom 0003:056A:0061.0005: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 40.216988][ T17] wacom 0003:056A:0061.0006: Unknown device_type for 'HID 056a:0061'. Assuming pen. [ 40.255193][ T3221] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.2/usb3/3-1/3-1:0.0/0003:056A:0061.0005/input/input17 [ 40.261332][ T17] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.3/usb4/4-1/4-1:0.0/0003:056A:0061.0006/input/input20 [ 40.273988][ T95] input: Wacom PenStation2 Pen as /devices/platform/dummy_hcd.1/usb2/2-1/2-1:0.0/0003:056A:0061.0004/input/input14 [ 40.319816][ T17] wacom 0003:056A:0061.0006: hidraw2: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.3-1/input0 [ 40.321080][ T3221] wacom 0003:056A:0061.0005: hidraw3: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.2-1/input0 [ 40.341463][ T17] usb 6-1: USB disconnect, device number 2 [ 40.350911][ T95] wacom 0003:056A:0061.0004: hidraw4: USB HID v0.00 Device [HID 056a:0061] on usb-dummy_hcd.1-1/input0 [ 40.361396][ T167] usb 5-1: USB disconnect, device number 2 [ 40.368795][ T17] usbhid 6-1:0.0: Stop: 0 0 0 [ 40.373836][ T17] ------------[ cut here ]------------ [ 40.379374][ T17] usbhid 6-1:0.0: Stop while open = 1 [ 40.384932][ T17] WARNING: CPU: 1 PID: 17 at drivers/hid/usbhid/hid-core.c:1205 usbhid_stop.cold+0x1c7/0x5a6 [ 40.395065][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 40.401656][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.6.0-rc7-syzkaller #0 [ 40.409792][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.419854][ T17] Workqueue: usb_hub_wq hub_event [ 40.424861][ T17] Call Trace: [ 40.428142][ T17] dump_stack+0xef/0x16e [ 40.432371][ T17] ? usbhid_stop.cold+0x126/0x5a6 [ 40.437380][ T17] panic+0x2aa/0x6e1 [ 40.441257][ T17] ? add_taint.cold+0x16/0x16 [ 40.446043][ T17] ? __probe_kernel_read+0x188/0x1d0 [ 40.451331][ T17] ? __warn.cold+0x14/0x30 [ 40.455743][ T17] ? __warn+0xd5/0x1c8 [ 40.459821][ T17] ? usbhid_stop.cold+0x1c7/0x5a6 [ 40.464887][ T17] __warn.cold+0x2f/0x30 [ 40.469127][ T17] ? usbhid_stop.cold+0x1c7/0x5a6 [ 40.474152][ T17] report_bug+0x27b/0x2f0 [ 40.478482][ T17] do_error_trap+0x12b/0x1e0 [ 40.483086][ T17] ? usbhid_stop.cold+0x1c7/0x5a6 [ 40.488124][ T17] do_invalid_op+0x32/0x40 [ 40.492535][ T17] ? usbhid_stop.cold+0x1c7/0x5a6 [ 40.497638][ T17] invalid_op+0x23/0x30 [ 40.501817][ T17] RIP: 0010:usbhid_stop.cold+0x1c7/0x5a6 [ 40.507438][ T17] Code: 48 89 7c 24 08 e8 9f 5e bd fc 48 8b 7c 24 08 e8 c5 2e f7 fd 48 8b 14 24 44 89 f9 48 c7 c7 20 4b 84 86 48 89 c6 e8 47 ef 91 fc <0f> 0b e8 78 5e bd fc 48 8d bb ac 1e 00 00 b8 ff ff 37 00 48 89 fa [ 40.527035][ T17] RSP: 0018:ffff8881da267640 EFLAGS: 00010282 [ 40.533107][ T17] RAX: 0000000000000000 RBX: ffff8881cd788000 RCX: 0000000000000000 [ 40.541066][ T17] RDX: 0000000000000000 RSI: ffffffff812974dd RDI: ffffed103b44ceba [ 40.549047][ T17] RBP: ffff8881cd22c000 R08: ffff8881da24b100 R09: ffffed103b66439f [ 40.557019][ T17] R10: ffffed103b66439e R11: ffff8881db321cf3 R12: ffff8881cd789fd8 [ 40.564976][ T17] R13: ffff8881cd22c008 R14: ffff8881d6c41000 R15: 0000000000000001 [ 40.573044][ T17] ? vprintk_func+0x7d/0x113 [ 40.577631][ T17] wacom_remove+0x88/0x3b0 [ 40.582050][ T17] hid_device_remove+0xed/0x240 [ 40.586914][ T17] ? wacom_close+0x80/0x80 [ 40.591343][ T17] ? hid_compare_device_paths+0xc0/0xc0 [ 40.596953][ T17] device_release_driver_internal+0x231/0x500 [ 40.603131][ T17] bus_remove_device+0x2eb/0x5a0 [ 40.608063][ T17] device_del+0x481/0xd30 [ 40.612394][ T17] ? device_create_with_groups+0x120/0x120 [ 40.618194][ T17] ? do_raw_spin_lock+0x129/0x290 [ 40.623207][ T17] hid_destroy_device+0xe1/0x150 [ 40.628135][ T17] usbhid_disconnect+0x9f/0xe0 [ 40.632975][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 40.638207][ T17] ? __pm_runtime_idle+0xd1/0x310 [ 40.643251][ T17] ? usb_autoresume_device+0x60/0x60 [ 40.648532][ T17] device_release_driver_internal+0x42f/0x500 [ 40.654599][ T17] bus_remove_device+0x2eb/0x5a0 [ 40.659556][ T17] device_del+0x481/0xd30 [ 40.663889][ T17] ? device_create_with_groups+0x120/0x120 [ 40.669687][ T17] ? usb_remove_ep_devs+0x3e/0x80 [ 40.674725][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 40.680024][ T17] usb_disable_device+0x23d/0x790 [ 40.685068][ T17] usb_disconnect+0x293/0x900 [ 40.689742][ T17] hub_event+0x1a1d/0x4300 [ 40.694170][ T17] ? hub_port_debounce+0x350/0x350 [ 40.699268][ T17] ? find_held_lock+0x2d/0x110 [ 40.704017][ T17] ? mark_held_locks+0xe0/0xe0 [ 40.708773][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 40.714333][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 40.719619][ T17] process_one_work+0x94b/0x1620 [ 40.724564][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 40.729952][ T17] ? do_raw_spin_lock+0x129/0x290 [ 40.735080][ T17] worker_thread+0x96/0xe20 [ 40.739579][ T17] ? process_one_work+0x1620/0x1620 [ 40.744779][ T17] kthread+0x318/0x420 [ 40.748843][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 40.754489][ T17] ret_from_fork+0x24/0x30 [ 40.759763][ T17] Kernel Offset: disabled [ 40.764216][ T17] Rebooting in 86400 seconds..