[info] Using makefile-style concurrent boot in runlevel 2. [ 14.605184][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.10.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.904137][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 37.263845][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=b700, bcdDevice=4c.5e [ 37.272964][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 37.282245][ T12] usb 1-1: config 0 descriptor?? [ 37.325607][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge 117xxx ATSC+' in warm state [ 37.336185][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 37.347136][ T12] dvbdev: DVB: registering new adapter (Hauppauge 117xxx ATSC+) [ 37.355204][ T12] usb 1-1: media controller created [ 37.364183][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 37.379406][ T12] usb 1-1: selecting invalid altsetting 1 [ 37.385201][ T12] set interface failed [ 37.385206][ T12] ------------[ cut here ]------------ [ 37.394739][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 37.394781][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:938 __mutex_lock+0xd31/0x1360 [ 37.409818][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 37.416397][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc5+ #0 [ 37.423738][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.433794][ T12] Workqueue: usb_hub_wq hub_event [ 37.438790][ T12] Call Trace: [ 37.442071][ T12] dump_stack+0xca/0x13e [ 37.446304][ T12] ? __mutex_lock+0xcf0/0x1360 [ 37.451045][ T12] panic+0x2aa/0x6e1 [ 37.454917][ T12] ? add_taint.cold+0x16/0x16 [ 37.459572][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 37.465080][ T12] ? __warn.cold+0x14/0x33 [ 37.469473][ T12] ? __warn+0xd5/0x1d0 [ 37.473518][ T12] ? __mutex_lock+0xd31/0x1360 [ 37.478311][ T12] __warn.cold+0x2f/0x33 [ 37.482528][ T12] ? __mutex_lock+0xd31/0x1360 [ 37.487265][ T12] report_bug+0x27b/0x2f0 [ 37.491570][ T12] do_error_trap+0x12b/0x1e0 [ 37.496215][ T12] ? __mutex_lock+0xd31/0x1360 [ 37.501006][ T12] do_invalid_op+0x32/0x40 [ 37.505456][ T12] ? __mutex_lock+0xd31/0x1360 [ 37.510322][ T12] invalid_op+0x23/0x30 [ 37.514454][ T12] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 37.519808][ T12] Code: d2 0f 85 f6 05 00 00 44 8b 05 8b 78 17 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 a0 8a c6 85 48 c7 c7 a0 88 c6 85 e8 54 ba a4 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 37.539515][ T12] RSP: 0018:ffff8881da226ef0 EFLAGS: 00010282 [ 37.545565][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 37.553523][ T12] RDX: 0000000000000000 RSI: ffffffff8128c8ed RDI: ffffed103b444dd0 [ 37.561643][ T12] RBP: ffff8881da227060 R08: ffff8881da211800 R09: fffffbfff0d9e975 [ 37.569631][ T12] R10: fffffbfff0d9e974 R11: ffffffff86cf4ba3 R12: 0000000000000000 [ 37.577591][ T12] R13: dffffc0000000000 R14: ffff8881cff8b9c8 R15: ffff8881cff8b9c8 [ 37.586093][ T12] ? vprintk_func+0x7d/0x113 [ 37.590672][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 37.595680][ T12] ? find_held_lock+0x2d/0x110 [ 37.600773][ T12] ? vprintk_emit+0xe2/0x3e0 [ 37.605344][ T12] ? mutex_trylock+0x2c0/0x2c0 [ 37.610096][ T12] ? mark_lock+0xbc/0x1160 [ 37.614490][ T12] ? mark_held_locks+0x9f/0xe0 [ 37.619229][ T12] ? vprintk_emit+0x112/0x3e0 [ 37.623894][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 37.628919][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 37.633774][ T12] mxl111sf_write_reg+0x8b/0x120 [ 37.638719][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 37.645560][ T12] ? usb_set_interface+0x79c/0xa50 [ 37.650657][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 37.655667][ T12] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 37.663023][ T12] mxl111sf_frontend_attach_atsc_mh+0x13/0x70 [ 37.669087][ T12] ? mxl111sf_lg2160_frontend_attach+0x900/0x900 [ 37.675408][ T12] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 37.680759][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 37.685940][ T12] ? rpm_callback+0x230/0x230 [ 37.690607][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 37.695873][ T12] ? __pm_runtime_resume+0x111/0x180 [ 37.701142][ T12] usb_probe_interface+0x305/0x7a0 [ 37.706242][ T12] ? usb_probe_device+0x100/0x100 [ 37.711257][ T12] really_probe+0x281/0x6d0 [ 37.715762][ T12] driver_probe_device+0x104/0x210 [ 37.720858][ T12] __device_attach_driver+0x1c2/0x220 [ 37.726231][ T12] ? driver_allows_async_probing+0x160/0x160 [ 37.732189][ T12] bus_for_each_drv+0x162/0x1e0 [ 37.737020][ T12] ? bus_rescan_devices+0x20/0x20 [ 37.742040][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 37.747826][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 37.753091][ T12] __device_attach+0x217/0x360 [ 37.757838][ T12] ? device_bind_driver+0xd0/0xd0 [ 37.763510][ T12] ? kobject_uevent_env+0x29e/0x1160 [ 37.768779][ T12] ? kobject_uevent_env+0x2a8/0x1160 [ 37.774059][ T12] bus_probe_device+0x1e4/0x290 [ 37.778893][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 37.785004][ T12] device_add+0xae6/0x16f0 [ 37.789584][ T12] ? uevent_store+0x50/0x50 [ 37.794131][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 37.800196][ T12] usb_set_configuration+0xdf6/0x1670 [ 37.805554][ T12] generic_probe+0x9d/0xd5 [ 37.809948][ T12] usb_probe_device+0x99/0x100 [ 37.814688][ T12] ? usb_suspend+0x620/0x620 [ 37.819263][ T12] really_probe+0x281/0x6d0 [ 37.823744][ T12] driver_probe_device+0x104/0x210 [ 37.828830][ T12] __device_attach_driver+0x1c2/0x220 [ 37.834190][ T12] ? driver_allows_async_probing+0x160/0x160 [ 37.840257][ T12] bus_for_each_drv+0x162/0x1e0 [ 37.846061][ T12] ? bus_rescan_devices+0x20/0x20 [ 37.851083][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 37.856880][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 37.862139][ T12] __device_attach+0x217/0x360 [ 37.866878][ T12] ? device_bind_driver+0xd0/0xd0 [ 37.871883][ T12] ? kobject_uevent_env+0x29e/0x1160 [ 37.877144][ T12] ? kobject_uevent_env+0x2a8/0x1160 [ 37.882423][ T12] bus_probe_device+0x1e4/0x290 [ 37.887253][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 37.893511][ T12] device_add+0xae6/0x16f0 [ 37.897907][ T12] ? uevent_store+0x50/0x50 [ 37.902386][ T12] usb_new_device.cold+0x6a4/0xe79 [ 37.907473][ T12] hub_event+0x1df8/0x3800 [ 37.911869][ T12] ? hub_port_debounce+0x260/0x260 [ 37.916955][ T12] ? find_held_lock+0x2d/0x110 [ 37.921693][ T12] ? mark_held_locks+0xe0/0xe0 [ 37.926572][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 37.932452][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 37.937723][ T12] process_one_work+0x92b/0x1530 [ 37.942639][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 37.948025][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 37.953038][ T12] worker_thread+0x96/0xe20 [ 37.957528][ T12] ? process_one_work+0x1530/0x1530 [ 37.962701][ T12] kthread+0x318/0x420 [ 37.966747][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 37.972094][ T12] ret_from_fork+0x24/0x30 [ 37.977267][ T12] Kernel Offset: disabled [ 37.981576][ T12] Rebooting in 86400 seconds..