[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.982611][ T4822] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 52.522513][ T4822] usb 1-1: New USB device found, idVendor=0ccd, idProduct=0039, bcdDevice= 8.42 [ 52.531762][ T4822] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 52.539968][ T4822] usb 1-1: Product: syz [ 52.544322][ T4822] usb 1-1: Manufacturer: syz [ 52.548915][ T4822] usb 1-1: SerialNumber: syz [ 52.557451][ T4822] usb 1-1: config 0 descriptor?? [ 52.609223][ T4822] pvrusb2: Hardware description: Terratec Grabster AV400 [ 52.617409][ T4822] pvrusb2: ********** [ 52.621413][ T4822] pvrusb2: ***WARNING*** Support for this device (Terratec Grabster AV400) is experimental. [ 52.631980][ T4822] pvrusb2: Important functionality might not be entirely working. [ 52.640259][ T4822] pvrusb2: Please consider contacting the driver author to help with further stabilization of the driver. [ 52.651960][ T4822] pvrusb2: ********** executing program [ 52.823379][ T3947] pvrusb2: Invalid write control endpoint [ 52.825963][ T4822] usb 1-1: USB disconnect, device number 2 [ 52.901916][ T3947] pvrusb2: Invalid write control endpoint [ 52.908248][ T3947] pvrusb2: ***WARNING*** Detected a wedged cx25840 chip; the device will not work. [ 52.918390][ T3947] pvrusb2: ***WARNING*** Try power cycling the pvrusb2 device. [ 52.926063][ T3947] pvrusb2: ***WARNING*** Disabling further access to the device to prevent other foul-ups. [ 52.936174][ T3947] pvrusb2: Device being rendered inoperable [ 52.943694][ T3947] cx25840 1-0044: Unable to detect h/w, assuming cx23887 [ 52.950944][ T3947] cx25840 1-0044: cx23887 A/V decoder found @ 0x88 (pvrusb2_a) [ 52.962119][ T3947] pvrusb2: Attached sub-driver cx25840 [ 52.967867][ T3947] pvrusb2: ***WARNING*** pvrusb2 device hardware appears to be jammed and I can't clear it. [ 52.978744][ T3947] pvrusb2: You might need to power cycle the pvrusb2 device in order to recover. [ 53.003576][ T3947] ------------[ cut here ]------------ [ 53.009084][ T3947] sysfs group 'power' not found for kobject 'i2c-1' [ 53.024701][ T3947] WARNING: CPU: 0 PID: 3947 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 [ 53.036737][ T3947] Modules linked in: [ 53.040976][ T3947] CPU: 0 PID: 3947 Comm: pvrusb2-context Not tainted 5.12.0-rc8-syzkaller #0 [ 53.051785][ T3947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.062566][ T3947] RIP: 0010:sysfs_remove_group+0x16e/0x280 [ 53.068383][ T3947] Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 57 da c8 ff 49 8b 14 24 48 c7 c7 80 1b 22 8a 4c 89 f6 31 c0 e8 62 c0 4e ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 00 5a 82 ff 49 8d 5e 20 [ 53.089739][ T3947] RSP: 0018:ffffc900037afb48 EFLAGS: 00010246 [ 53.096518][ T3947] RAX: c737bb1d12397200 RBX: ffff88801ef343a8 RCX: ffff88801e220000 [ 53.105347][ T3947] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 53.114580][ T3947] RBP: 1ffffffff1519c68 R08: ffffffff8164f2f2 R09: ffffed1017385fe8 [ 53.123171][ T3947] R10: ffffed1017385fe8 R11: 0000000000000000 R12: ffff88801ef34378 [ 53.131145][ T3947] R13: dffffc0000000000 R14: ffffffff8a8ce300 R15: ffff888012b9b658 [ 53.140121][ T3947] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 53.149665][ T3947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.156829][ T3947] CR2: 00007efc0674e000 CR3: 0000000013a66000 CR4: 00000000001506f0 [ 53.165511][ T3947] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.174413][ T3947] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.183027][ T3947] Call Trace: [ 53.186309][ T3947] device_del+0x2ed/0xc10 [ 53.190641][ T3947] ? kill_device+0x150/0x150 [ 53.196448][ T3947] device_unregister+0x1a/0xc0 [ 53.201250][ T3947] i2c_del_adapter+0x370/0x7f0 [ 53.207853][ T3947] pvr2_i2c_core_done+0x55/0xb0 [ 53.213666][ T3947] pvr2_hdw_destroy+0x150/0x2b0 [ 53.218525][ T3947] pvr2_context_destroy+0x7a/0x3c0 [ 53.224586][ T3947] ? pvr2_context_thread_func+0x415/0xb30 [ 53.230305][ T3947] pvr2_context_thread_func+0x41d/0xb30 [ 53.237597][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.244110][ T3947] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 53.250023][ T3947] ? init_wait_entry+0xd0/0xd0 [ 53.256206][ T3947] ? _raw_spin_lock+0x40/0x40 [ 53.260901][ T3947] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 53.267819][ T3947] ? _raw_spin_unlock+0x40/0x40 [ 53.273451][ T3947] ? __kthread_parkme+0x148/0x190 [ 53.278475][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.284868][ T3947] kthread+0x39a/0x3c0 [ 53.288955][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.295295][ T3947] ? kthread_blkcg+0xd0/0xd0 [ 53.299883][ T3947] ret_from_fork+0x1f/0x30 [ 53.305949][ T3947] Kernel panic - not syncing: panic_on_warn set ... [ 53.312529][ T3947] CPU: 0 PID: 3947 Comm: pvrusb2-context Not tainted 5.12.0-rc8-syzkaller #0 [ 53.321269][ T3947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.331305][ T3947] Call Trace: [ 53.334571][ T3947] dump_stack+0x202/0x31e [ 53.338888][ T3947] ? show_regs_print_info+0x12/0x12 [ 53.342104][ T4822] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 53.344066][ T3947] ? log_buf_vmcoreinfo_setup+0x45d/0x45d [ 53.344101][ T3947] panic+0x2e1/0x850 [ 53.361097][ T3947] ? __kernel_text_address+0x93/0x100 [ 53.366456][ T3947] ? __warn+0x13e/0x270 [ 53.370597][ T3947] ? nmi_panic+0x90/0x90 [ 53.374840][ T3947] ? ret_from_fork+0x1f/0x30 [ 53.379435][ T3947] __warn+0x26a/0x270 [ 53.383435][ T3947] ? sysfs_remove_group+0x16e/0x280 [ 53.388620][ T3947] ? sysfs_remove_group+0x16e/0x280 [ 53.393815][ T3947] report_bug+0x1b1/0x2e0 [ 53.398149][ T3947] handle_bug+0x3d/0x70 [ 53.402294][ T3947] exc_invalid_op+0x16/0x40 [ 53.406817][ T3947] asm_exc_invalid_op+0x12/0x20 [ 53.411658][ T3947] RIP: 0010:sysfs_remove_group+0x16e/0x280 [ 53.417449][ T3947] Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 57 da c8 ff 49 8b 14 24 48 c7 c7 80 1b 22 8a 4c 89 f6 31 c0 e8 62 c0 4e ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 00 5a 82 ff 49 8d 5e 20 [ 53.437037][ T3947] RSP: 0018:ffffc900037afb48 EFLAGS: 00010246 [ 53.443101][ T3947] RAX: c737bb1d12397200 RBX: ffff88801ef343a8 RCX: ffff88801e220000 [ 53.451056][ T3947] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 53.459009][ T3947] RBP: 1ffffffff1519c68 R08: ffffffff8164f2f2 R09: ffffed1017385fe8 [ 53.466963][ T3947] R10: ffffed1017385fe8 R11: 0000000000000000 R12: ffff88801ef34378 [ 53.475038][ T3947] R13: dffffc0000000000 R14: ffffffff8a8ce300 R15: ffff888012b9b658 [ 53.483022][ T3947] ? wake_up_klogd+0xb2/0xf0 [ 53.487611][ T3947] ? sysfs_remove_group+0x16e/0x280 [ 53.492803][ T3947] device_del+0x2ed/0xc10 [ 53.497154][ T3947] ? kill_device+0x150/0x150 [ 53.501742][ T3947] device_unregister+0x1a/0xc0 [ 53.506550][ T3947] i2c_del_adapter+0x370/0x7f0 [ 53.511308][ T3947] pvr2_i2c_core_done+0x55/0xb0 [ 53.516146][ T3947] pvr2_hdw_destroy+0x150/0x2b0 [ 53.520981][ T3947] pvr2_context_destroy+0x7a/0x3c0 [ 53.526099][ T3947] ? pvr2_context_thread_func+0x415/0xb30 [ 53.531805][ T3947] pvr2_context_thread_func+0x41d/0xb30 [ 53.537339][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.542871][ T3947] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 53.548748][ T3947] ? init_wait_entry+0xd0/0xd0 [ 53.553505][ T3947] ? _raw_spin_lock+0x40/0x40 [ 53.558184][ T3947] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 53.564077][ T3947] ? _raw_spin_unlock+0x40/0x40 [ 53.568940][ T3947] ? __kthread_parkme+0x148/0x190 [ 53.573953][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.579482][ T3947] kthread+0x39a/0x3c0 [ 53.583535][ T3947] ? pvr2_context_global_init+0x60/0x60 [ 53.589066][ T3947] ? kthread_blkcg+0xd0/0xd0 [ 53.593646][ T3947] ret_from_fork+0x1f/0x30 [ 53.598795][ T3947] Kernel Offset: disabled [ 53.603192][ T3947] Rebooting in 86400 seconds..