[info] Using makefile-style concurrent boot in runlevel 2. [....] 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[ 14.143023][ T1660] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 14.245472][ C1] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.351376][ T102] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 37.711386][ T102] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0xE has wMaxPacketSize 0, skipping [ 37.721407][ T102] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0xC has wMaxPacketSize 0, skipping [ 37.731417][ T102] usb 1-1: New USB device found, idVendor=2040, idProduct=c609, bcdDevice=fa.4d [ 37.740429][ T102] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 37.749975][ T102] usb 1-1: config 0 descriptor?? [ 37.793110][ T102] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx ATSC' in warm state [ 37.802704][ T102] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 37.813337][ T102] dvbdev: DVB: registering new adapter (Hauppauge 126xxx ATSC) [ 37.820932][ T102] usb 1-1: media controller created [ 37.829744][ T102] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 37.844251][ T102] usb 1-1: selecting invalid altsetting 1 [ 37.850578][ T102] set interface failed [ 37.850582][ T102] ------------[ cut here ]------------ [ 37.860220][ T102] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 37.860251][ T102] WARNING: CPU: 0 PID: 102 at kernel/locking/mutex.c:938 __mutex_lock+0xd31/0x1360 [ 37.875316][ T102] Kernel panic - not syncing: panic_on_warn set ... [ 37.881881][ T102] CPU: 0 PID: 102 Comm: kworker/0:2 Not tainted 5.4.0-rc6+ #0 [ 37.889307][ T102] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.899341][ T102] Workqueue: usb_hub_wq hub_event [ 37.904339][ T102] Call Trace: [ 37.907611][ T102] dump_stack+0xca/0x13e [ 37.911843][ T102] ? __mutex_lock+0xcd0/0x1360 [ 37.916604][ T102] panic+0x2aa/0x6e1 [ 37.920493][ T102] ? add_taint.cold+0x16/0x16 [ 37.925150][ T102] ? __probe_kernel_read+0x188/0x1d0 [ 37.930409][ T102] ? __warn.cold+0x14/0x33 [ 37.934798][ T102] ? __warn+0xd5/0x1d0 [ 37.938842][ T102] ? __mutex_lock+0xd31/0x1360 [ 37.943581][ T102] __warn.cold+0x2f/0x33 [ 37.947804][ T102] ? __mutex_lock+0xd31/0x1360 [ 37.952538][ T102] report_bug+0x27b/0x2f0 [ 37.956856][ T102] do_error_trap+0x12b/0x1e0 [ 37.961434][ T102] ? __mutex_lock+0xd31/0x1360 [ 37.966171][ T102] do_invalid_op+0x32/0x40 [ 37.970571][ T102] ? __mutex_lock+0xd31/0x1360 [ 37.975308][ T102] invalid_op+0x23/0x30 [ 37.979441][ T102] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 37.984787][ T102] Code: d2 0f 85 f6 05 00 00 44 8b 05 2b 6c 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 34 c2 a4 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 38.004363][ T102] RSP: 0018:ffff8881d536ef10 EFLAGS: 00010286 [ 38.010403][ T102] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 38.018371][ T102] RDX: 0000000000000000 RSI: ffffffff8128c9cd RDI: ffffed103aa6ddd4 [ 38.026317][ T102] RBP: ffff8881d536f080 R08: ffff8881d541b000 R09: fffffbfff0d9e975 [ 38.034263][ T102] R10: fffffbfff0d9e974 R11: ffffffff86cf4ba3 R12: 0000000000000000 [ 38.042221][ T102] R13: dffffc0000000000 R14: ffff8881d4c129c8 R15: ffff8881d4c129c8 [ 38.050184][ T102] ? vprintk_func+0x7d/0x113 [ 38.054750][ T102] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 38.059749][ T102] ? find_held_lock+0x2d/0x110 [ 38.064486][ T102] ? vprintk_emit+0xe2/0x3e0 [ 38.069048][ T102] ? mutex_trylock+0x2c0/0x2c0 [ 38.073787][ T102] ? uevent_store+0x50/0x50 [ 38.078262][ T102] ? mark_lock+0xbc/0x1160 [ 38.082650][ T102] ? mark_held_locks+0x9f/0xe0 [ 38.087386][ T102] ? vprintk_emit+0x112/0x3e0 [ 38.092035][ T102] ? lockdep_hardirqs_on+0x382/0x580 [ 38.097290][ T102] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 38.102415][ T102] mxl111sf_ctrl_msg+0xb8/0x210 [ 38.107240][ T102] mxl111sf_write_reg+0x8b/0x120 [ 38.112151][ T102] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 38.118795][ T102] ? usb_set_interface+0x79c/0xa50 [ 38.123880][ T102] mxl1x1sf_soft_reset+0x6b/0x190 [ 38.128876][ T102] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 38.136227][ T102] ? mxl111sf_lgdt3305_frontend_attach.constprop.0+0x790/0x790 [ 38.143738][ T102] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 38.149080][ T102] ? dvb_usb_start_feed+0xb60/0xb60 [ 38.154267][ T102] ? rpm_callback+0x230/0x230 [ 38.158914][ T102] ? lockdep_hardirqs_on+0x382/0x580 [ 38.164170][ T102] ? __pm_runtime_resume+0x111/0x180 [ 38.169437][ T102] usb_probe_interface+0x305/0x7a0 [ 38.174525][ T102] ? usb_probe_device+0x100/0x100 [ 38.179524][ T102] really_probe+0x281/0x6d0 [ 38.184008][ T102] driver_probe_device+0x104/0x210 [ 38.189092][ T102] __device_attach_driver+0x1c2/0x220 [ 38.194440][ T102] ? driver_allows_async_probing+0x160/0x160 [ 38.200392][ T102] bus_for_each_drv+0x162/0x1e0 [ 38.205215][ T102] ? bus_rescan_devices+0x20/0x20 [ 38.210213][ T102] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 38.215998][ T102] ? lockdep_hardirqs_on+0x382/0x580 [ 38.221262][ T102] __device_attach+0x217/0x360 [ 38.226004][ T102] ? device_bind_driver+0xd0/0xd0 [ 38.230999][ T102] ? kobject_uevent_env+0x29e/0x1160 [ 38.236256][ T102] ? kobject_uevent_env+0x2a8/0x1160 [ 38.241515][ T102] bus_probe_device+0x1e4/0x290 [ 38.246344][ T102] ? blocking_notifier_call_chain+0x54/0xa0 [ 38.252209][ T102] device_add+0xae6/0x16f0 [ 38.256601][ T102] ? uevent_store+0x50/0x50 [ 38.261078][ T102] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 38.266856][ T102] usb_set_configuration+0xdf6/0x1670 [ 38.272202][ T102] generic_probe+0x9d/0xd5 [ 38.276597][ T102] usb_probe_device+0x99/0x100 [ 38.281359][ T102] ? usb_suspend+0x620/0x620 [ 38.285922][ T102] really_probe+0x281/0x6d0 [ 38.290412][ T102] driver_probe_device+0x104/0x210 [ 38.295507][ T102] __device_attach_driver+0x1c2/0x220 [ 38.300852][ T102] ? driver_allows_async_probing+0x160/0x160 [ 38.306802][ T102] bus_for_each_drv+0x162/0x1e0 [ 38.311638][ T102] ? bus_rescan_devices+0x20/0x20 [ 38.316635][ T102] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 38.322414][ T102] ? lockdep_hardirqs_on+0x382/0x580 [ 38.327670][ T102] __device_attach+0x217/0x360 [ 38.332418][ T102] ? device_bind_driver+0xd0/0xd0 [ 38.337424][ T102] ? kobject_uevent_env+0x29e/0x1160 [ 38.342686][ T102] ? kobject_uevent_env+0x2a8/0x1160 [ 38.347953][ T102] bus_probe_device+0x1e4/0x290 [ 38.352784][ T102] ? blocking_notifier_call_chain+0x54/0xa0 [ 38.358698][ T102] device_add+0xae6/0x16f0 [ 38.363094][ T102] ? uevent_store+0x50/0x50 [ 38.367578][ T102] usb_new_device.cold+0x6a4/0xe79 [ 38.372663][ T102] hub_event+0x1df8/0x3800 [ 38.377055][ T102] ? hub_port_debounce+0x260/0x260 [ 38.382141][ T102] ? find_held_lock+0x2d/0x110 [ 38.386880][ T102] ? mark_held_locks+0xe0/0xe0 [ 38.391626][ T102] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 38.397188][ T102] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 38.402449][ T102] process_one_work+0x92b/0x1530 [ 38.407364][ T102] ? pwq_dec_nr_in_flight+0x310/0x310 [ 38.412707][ T102] ? do_raw_spin_lock+0x11a/0x280 [ 38.417703][ T102] worker_thread+0x96/0xe20 [ 38.422179][ T102] ? process_one_work+0x1530/0x1530 [ 38.427350][ T102] kthread+0x318/0x420 [ 38.431395][ T102] ? kthread_create_on_node+0xf0/0xf0 [ 38.436737][ T102] ret_from_fork+0x24/0x30 [ 38.441869][ T102] Kernel Offset: disabled [ 38.446186][ T102] Rebooting in 86400 seconds..