[info] Using makefile-style concurrent boot in runlevel 2. [ 15.179775][ 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 '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.426695][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 24.666635][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 24.826708][ T12] usb 1-1: unable to get BOS descriptor or descriptor too short [ 24.906763][ T12] usb 1-1: config 9 interface 0 has no altsetting 0 [ 25.146713][ T12] usb 1-1: string descriptor 0 read error: -22 [ 25.153091][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=c60b, bcdDevice=ad.cb [ 25.162786][ T12] usb 1-1: New USB device strings: Mfr=18, Product=9, SerialNumber=255 [ 25.208445][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx ATSC+' in warm state [ 25.217949][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 25.228686][ T12] dvbdev: DVB: registering new adapter (Hauppauge 126xxx ATSC+) [ 25.236412][ T12] usb 1-1: media controller created [ 25.245413][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 25.261109][ T12] usb 1-1: selecting invalid altsetting 1 [ 25.266898][ T12] set interface failed [ 25.266905][ T12] ------------[ cut here ]------------ [ 25.276475][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 25.276521][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912 __mutex_lock+0xd31/0x1360 [ 25.291484][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 25.298052][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2+ #23 [ 25.305599][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.315888][ T12] Workqueue: usb_hub_wq hub_event [ 25.320895][ T12] Call Trace: [ 25.324170][ T12] dump_stack+0xca/0x13e [ 25.328403][ T12] ? __mutex_lock+0xd20/0x1360 [ 25.333149][ T12] panic+0x2a3/0x6da [ 25.337031][ T12] ? add_taint.cold+0x16/0x16 [ 25.341693][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 25.347055][ T12] ? __warn.cold+0x5/0x4a [ 25.351363][ T12] ? __warn+0xe3/0x1e0 [ 25.355411][ T12] ? __mutex_lock+0xd31/0x1360 [ 25.360447][ T12] __warn.cold+0x20/0x4a [ 25.364781][ T12] ? __mutex_lock+0xd31/0x1360 [ 25.369578][ T12] report_bug+0x262/0x2a0 [ 25.373891][ T12] do_error_trap+0x12b/0x1e0 [ 25.378458][ T12] ? __mutex_lock+0xd31/0x1360 [ 25.383200][ T12] do_invalid_op+0x32/0x40 [ 25.387595][ T12] ? __mutex_lock+0xd31/0x1360 [ 25.392339][ T12] invalid_op+0x23/0x30 [ 25.396604][ T12] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 25.401967][ T12] Code: d2 0f 85 f6 05 00 00 44 8b 05 bb 99 0a 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 00 87 a6 85 48 c7 c7 a0 84 a6 85 e8 f4 24 b8 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 25.421557][ T12] RSP: 0018:ffff8881da206f40 EFLAGS: 00010282 [ 25.427604][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 25.435563][ T12] RDX: 0000000000000000 RSI: ffffffff812830fd RDI: ffffed103b440dda [ 25.443592][ T12] RBP: ffff8881da2070b0 R08: ffff8881da1f1800 R09: fffffbfff0d5eb25 [ 25.451553][ T12] R10: fffffbfff0d5eb24 R11: ffffffff86af5923 R12: 0000000000000000 [ 25.459517][ T12] R13: dffffc0000000000 R14: ffff8881d2ee6ec8 R15: ffff8881d2ee6ec8 [ 25.467485][ T12] ? vprintk_func+0x7d/0x113 [ 25.472068][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 25.477155][ T12] ? find_held_lock+0x2d/0x110 [ 25.481905][ T12] ? vprintk_emit+0xe2/0x3e0 [ 25.486478][ T12] ? mutex_trylock+0x2c0/0x2c0 [ 25.491233][ T12] ? mark_lock+0xbc/0x1130 [ 25.495730][ T12] ? mark_held_locks+0x9f/0xe0 [ 25.500476][ T12] ? vprintk_emit+0x112/0x3e0 [ 25.505230][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 25.510235][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 25.515196][ T12] mxl111sf_write_reg+0x8b/0x120 [ 25.520120][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 25.526860][ T12] ? usb_set_interface+0x79c/0xa50 [ 25.531962][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 25.536985][ T12] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 25.544383][ T12] mxl111sf_frontend_attach_atsc_mh+0x13/0x70 [ 25.550435][ T12] ? mxl111sf_lg2160_frontend_attach+0x900/0x900 [ 25.556745][ T12] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 25.562142][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 25.567325][ T12] ? rpm_callback+0x230/0x230 [ 25.572046][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 25.577355][ T12] ? __pm_runtime_resume+0x111/0x180 [ 25.582625][ T12] usb_probe_interface+0x305/0x7a0 [ 25.587718][ T12] ? usb_probe_device+0x100/0x100 [ 25.592722][ T12] really_probe+0x281/0x650 [ 25.597208][ T12] driver_probe_device+0x101/0x1b0 [ 25.602614][ T12] __device_attach_driver+0x1c2/0x220 [ 25.607982][ T12] ? driver_allows_async_probing+0x160/0x160 [ 25.613972][ T12] bus_for_each_drv+0x15c/0x1e0 [ 25.618814][ T12] ? bus_rescan_devices+0x20/0x20 [ 25.623818][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 25.629609][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 25.634878][ T12] __device_attach+0x217/0x360 [ 25.639717][ T12] ? device_bind_driver+0xd0/0xd0 [ 25.644827][ T12] ? kobject_uevent_env+0x29e/0x1160 [ 25.650096][ T12] ? kobject_uevent_env+0x2a8/0x1160 [ 25.655360][ T12] bus_probe_device+0x1e4/0x290 [ 25.660195][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 25.666071][ T12] device_add+0xae6/0x16f0 [ 25.670469][ T12] ? uevent_store+0x50/0x50 [ 25.674948][ T12] usb_set_configuration+0xdf6/0x1670 [ 25.680306][ T12] generic_probe+0x9d/0xd5 [ 25.684706][ T12] usb_probe_device+0x99/0x100 [ 25.689455][ T12] ? usb_suspend+0x620/0x620 [ 25.694023][ T12] really_probe+0x281/0x650 [ 25.698508][ T12] driver_probe_device+0x101/0x1b0 [ 25.703596][ T12] __device_attach_driver+0x1c2/0x220 [ 25.709064][ T12] ? driver_allows_async_probing+0x160/0x160 [ 25.715151][ T12] bus_for_each_drv+0x15c/0x1e0 [ 25.719985][ T12] ? bus_rescan_devices+0x20/0x20 [ 25.724991][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 25.730815][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 25.736079][ T12] __device_attach+0x217/0x360 [ 25.740899][ T12] ? device_bind_driver+0xd0/0xd0 [ 25.745915][ T12] ? kobject_uevent_env+0x29e/0x1160 [ 25.751411][ T12] ? kobject_uevent_env+0x2a8/0x1160 [ 25.756682][ T12] bus_probe_device+0x1e4/0x290 [ 25.761524][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 25.767401][ T12] device_add+0xae6/0x16f0 [ 25.771801][ T12] ? uevent_store+0x50/0x50 [ 25.776286][ T12] usb_new_device.cold+0x6a4/0xe79 [ 25.781459][ T12] hub_event+0x1b5c/0x3640 [ 25.785869][ T12] ? hub_port_debounce+0x260/0x260 [ 25.791074][ T12] process_one_work+0x92b/0x1530 [ 25.796101][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.801584][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 25.806597][ T12] worker_thread+0x96/0xe20 [ 25.811187][ T12] ? process_one_work+0x1530/0x1530 [ 25.816364][ T12] kthread+0x318/0x420 [ 25.820415][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 25.826029][ T12] ret_from_fork+0x24/0x30 [ 25.830923][ T12] Kernel Offset: disabled [ 25.835253][ T12] Rebooting in 86400 seconds..