[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 13.914432][ C1] random: crng init done [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.36' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.430654][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.670229][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 25.790327][ T83] usb 1-1: New USB device found, idVendor=2040, idProduct=b763, bcdDevice=3d.f4 [ 25.799612][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 25.808785][ T83] usb 1-1: config 0 descriptor?? [ 25.852123][ T83] usb 1-1: dvb_usb_v2: found a 'Hauppauge 117xxx ATSC+' in warm state [ 25.862024][ T83] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 25.872579][ T83] dvbdev: DVB: registering new adapter (Hauppauge 117xxx ATSC+) [ 25.880292][ T83] usb 1-1: media controller created [ 25.888915][ T83] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 25.903792][ T83] usb 1-1: selecting invalid altsetting 1 [ 25.909517][ T83] set interface failed [ 25.909521][ T83] ------------[ cut here ]------------ [ 25.919066][ T83] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 25.919097][ T83] WARNING: CPU: 1 PID: 83 at kernel/locking/mutex.c:938 __mutex_lock+0xd31/0x1360 [ 25.934273][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 25.940866][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.4.0-rc3+ #0 [ 25.948205][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.958239][ T83] Workqueue: usb_hub_wq hub_event [ 25.963233][ T83] Call Trace: [ 25.966501][ T83] dump_stack+0xca/0x13e [ 25.970719][ T83] ? __mutex_lock+0xc70/0x1360 [ 25.975455][ T83] panic+0x2aa/0x6e1 [ 25.979322][ T83] ? add_taint.cold+0x16/0x16 [ 25.983973][ T83] ? __probe_kernel_read+0x188/0x1d0 [ 25.989227][ T83] ? __warn.cold+0x14/0x33 [ 25.993611][ T83] ? __warn+0xd5/0x1d0 [ 25.997649][ T83] ? __mutex_lock+0xd31/0x1360 [ 26.002380][ T83] __warn.cold+0x2f/0x33 [ 26.006601][ T83] ? __mutex_lock+0xd31/0x1360 [ 26.011335][ T83] report_bug+0x27b/0x2f0 [ 26.015633][ T83] do_error_trap+0x12b/0x1e0 [ 26.020194][ T83] ? __mutex_lock+0xd31/0x1360 [ 26.024928][ T83] do_invalid_op+0x32/0x40 [ 26.029313][ T83] ? __mutex_lock+0xd31/0x1360 [ 26.034135][ T83] invalid_op+0x23/0x30 [ 26.038273][ T83] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 26.043614][ T83] Code: d2 0f 85 f6 05 00 00 44 8b 05 8b cc 17 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 60 8a c6 85 48 c7 c7 60 88 c6 85 e8 d4 ec a1 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 26.063186][ T83] RSP: 0018:ffff8881d89b6ef0 EFLAGS: 00010282 [ 26.069220][ T83] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 26.077168][ T83] RDX: 0000000000000000 RSI: ffffffff8128bcbd RDI: ffffed103b136dd0 [ 26.085108][ T83] RBP: ffff8881d89b7060 R08: ffff8881d8c64800 R09: fffffbfff0d9e8f9 [ 26.093054][ T83] R10: fffffbfff0d9e8f8 R11: ffffffff86cf47c3 R12: 0000000000000000 [ 26.100995][ T83] R13: dffffc0000000000 R14: ffff8881cfea71c8 R15: ffff8881cfea71c8 [ 26.108939][ T83] ? vprintk_func+0x7d/0x113 [ 26.113501][ T83] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 26.118507][ T83] ? find_held_lock+0x2d/0x110 [ 26.123248][ T83] ? vprintk_emit+0xe2/0x3e0 [ 26.127813][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 26.132549][ T83] ? mark_lock+0xbc/0x1160 [ 26.136938][ T83] ? mark_held_locks+0x9f/0xe0 [ 26.141669][ T83] ? vprintk_emit+0x112/0x3e0 [ 26.146364][ T83] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 26.151402][ T83] mxl111sf_ctrl_msg+0xb8/0x210 [ 26.156227][ T83] mxl111sf_write_reg+0x8b/0x120 [ 26.161140][ T83] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 26.167822][ T83] ? usb_set_interface+0x79c/0xa50 [ 26.172907][ T83] mxl1x1sf_soft_reset+0x6b/0x190 [ 26.177936][ T83] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 26.185281][ T83] mxl111sf_frontend_attach_atsc_mh+0x13/0x70 [ 26.191318][ T83] ? mxl111sf_lg2160_frontend_attach+0x900/0x900 [ 26.197616][ T83] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 26.203078][ T83] ? dvb_usb_start_feed+0xb60/0xb60 [ 26.208318][ T83] ? rpm_callback+0x230/0x230 [ 26.212965][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 26.218220][ T83] ? __pm_runtime_resume+0x111/0x180 [ 26.223477][ T83] usb_probe_interface+0x305/0x7a0 [ 26.228596][ T83] ? usb_probe_device+0x100/0x100 [ 26.233594][ T83] really_probe+0x281/0x6d0 [ 26.238068][ T83] driver_probe_device+0x104/0x210 [ 26.243149][ T83] __device_attach_driver+0x1c2/0x220 [ 26.248491][ T83] ? driver_allows_async_probing+0x160/0x160 [ 26.254438][ T83] bus_for_each_drv+0x162/0x1e0 [ 26.259256][ T83] ? bus_rescan_devices+0x20/0x20 [ 26.264247][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 26.270023][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 26.275398][ T83] __device_attach+0x217/0x360 [ 26.280147][ T83] ? device_bind_driver+0xd0/0xd0 [ 26.285140][ T83] ? kobject_uevent_env+0x29e/0x1150 [ 26.290391][ T83] ? kobject_uevent_env+0x2a8/0x1150 [ 26.295643][ T83] bus_probe_device+0x1e4/0x290 [ 26.300686][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 26.306553][ T83] device_add+0xae6/0x16f0 [ 26.310944][ T83] ? uevent_store+0x50/0x50 [ 26.315421][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 26.321216][ T83] usb_set_configuration+0xdf6/0x1670 [ 26.326564][ T83] generic_probe+0x9d/0xd5 [ 26.330954][ T83] usb_probe_device+0x99/0x100 [ 26.335690][ T83] ? usb_suspend+0x620/0x620 [ 26.340255][ T83] really_probe+0x281/0x6d0 [ 26.344738][ T83] driver_probe_device+0x104/0x210 [ 26.349819][ T83] __device_attach_driver+0x1c2/0x220 [ 26.355162][ T83] ? driver_allows_async_probing+0x160/0x160 [ 26.361115][ T83] bus_for_each_drv+0x162/0x1e0 [ 26.365934][ T83] ? bus_rescan_devices+0x20/0x20 [ 26.370930][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 26.376705][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 26.382567][ T83] __device_attach+0x217/0x360 [ 26.387302][ T83] ? device_bind_driver+0xd0/0xd0 [ 26.392293][ T83] ? kobject_uevent_env+0x29e/0x1150 [ 26.397545][ T83] ? kobject_uevent_env+0x2a8/0x1150 [ 26.402798][ T83] bus_probe_device+0x1e4/0x290 [ 26.407617][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 26.413477][ T83] device_add+0xae6/0x16f0 [ 26.417861][ T83] ? uevent_store+0x50/0x50 [ 26.422333][ T83] usb_new_device.cold+0x6a4/0xe79 [ 26.427411][ T83] hub_event+0x1dd0/0x37e0 [ 26.431799][ T83] ? hub_port_debounce+0x260/0x260 [ 26.436878][ T83] ? find_held_lock+0x2d/0x110 [ 26.441609][ T83] ? mark_held_locks+0xe0/0xe0 [ 26.446343][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 26.451860][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 26.457117][ T83] process_one_work+0x92b/0x1530 [ 26.462034][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.467375][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 26.472366][ T83] worker_thread+0x96/0xe20 [ 26.476840][ T83] ? process_one_work+0x1530/0x1530 [ 26.482006][ T83] kthread+0x318/0x420 [ 26.486045][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 26.491385][ T83] ret_from_fork+0x24/0x30 [ 26.496387][ T83] Kernel Offset: disabled [ 26.500694][ T83] Rebooting in 86400 seconds..