[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.830849][ 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 '10.128.0.86' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.203154][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 41.443121][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 41.563277][ T12] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 41.573561][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x85 has an invalid bInterval 0, changing to 7 [ 41.584467][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x85 has wMaxPacketSize 0, skipping [ 41.594441][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=d864, bcdDevice=80.e2 [ 41.603491][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 41.612963][ T12] usb 1-1: config 0 descriptor?? executing program [ 41.923187][ T12] usb 1-1: string descriptor 0 read error: -71 [ 41.931630][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge 138xxx DVBT' in warm state [ 41.943098][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 41.953836][ T12] dvbdev: DVB: registering new adapter (Hauppauge 138xxx DVBT) [ 41.962705][ T12] usb 1-1: media controller created [ 41.972085][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 41.989155][ T12] usb 1-1: selecting invalid altsetting 2 [ 41.995081][ T12] set interface failed [ 41.995088][ T12] ------------[ cut here ]------------ [ 42.004625][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 42.004674][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:941 __mutex_lock+0xd2c/0x1360 [ 42.019641][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 42.026235][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc1-syzkaller #0 [ 42.034363][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.044412][ T12] Workqueue: usb_hub_wq hub_event [ 42.049682][ T12] Call Trace: [ 42.052961][ T12] dump_stack+0xef/0x16e [ 42.057187][ T12] ? __mutex_lock+0xc80/0x1360 [ 42.061925][ T12] panic+0x2aa/0x6e1 [ 42.065797][ T12] ? add_taint.cold+0x16/0x16 [ 42.070455][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 42.075723][ T12] ? __warn.cold+0x14/0x30 [ 42.080130][ T12] ? __warn+0xd5/0x1c8 [ 42.084194][ T12] ? __mutex_lock+0xd2c/0x1360 [ 42.088945][ T12] __warn.cold+0x2f/0x30 [ 42.093168][ T12] ? __mutex_lock+0xd2c/0x1360 [ 42.097925][ T12] report_bug+0x27b/0x2f0 [ 42.102233][ T12] do_error_trap+0x12b/0x1e0 [ 42.106803][ T12] ? __mutex_lock+0xd2c/0x1360 [ 42.111561][ T12] do_invalid_op+0x32/0x40 [ 42.115954][ T12] ? __mutex_lock+0xd2c/0x1360 [ 42.120696][ T12] invalid_op+0x23/0x30 [ 42.124833][ T12] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 42.130179][ T12] Code: d2 0f 85 f1 05 00 00 44 8b 05 a0 48 2d 02 45 85 c0 0f 85 0f f4 ff ff 48 c7 c6 e0 7e c6 85 48 c7 c7 e0 7c c6 85 e8 bc 83 99 fb <0f> 0b e9 f5 f3 ff ff 65 48 8b 1c 25 00 0f 02 00 be 08 00 00 00 48 [ 42.149776][ T12] RSP: 0018:ffff8881da226ef0 EFLAGS: 00010282 [ 42.155824][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 42.163784][ T12] RDX: 0000000000000000 RSI: ffffffff81295dad RDI: ffffed103b444dd0 [ 42.171740][ T12] RBP: ffff8881da227060 R08: ffff8881da211880 R09: fffffbfff0ddeb0d [ 42.179708][ T12] R10: fffffbfff0ddeb0c R11: ffffffff86ef5863 R12: 0000000000000000 [ 42.187934][ T12] R13: dffffc0000000000 R14: ffff8881cf4a91c8 R15: ffff8881cf4a91c8 [ 42.195910][ T12] ? vprintk_func+0x7d/0x113 [ 42.200533][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 42.205569][ T12] ? find_held_lock+0x2d/0x110 [ 42.210541][ T12] ? vprintk_emit+0xe2/0x3d0 [ 42.215139][ T12] ? mutex_trylock+0x2e0/0x2e0 [ 42.219922][ T12] ? mark_lock+0xbc/0x1160 [ 42.224317][ T12] ? mark_held_locks+0x9f/0xe0 [ 42.229073][ T12] ? vprintk_emit+0x112/0x3d0 [ 42.233763][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 42.239032][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 42.244036][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 42.248871][ T12] mxl111sf_write_reg+0x8b/0x120 [ 42.253792][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 42.261732][ T12] ? usb_set_interface+0x79c/0xa50 [ 42.266822][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 42.271824][ T12] mxl111sf_attach_demod+0x279/0x730 [ 42.277096][ T12] ? mxl111sf_attach_demod+0x730/0x730 [ 42.282533][ T12] dvb_usbv2_probe.cold+0x1e78/0x25d7 [ 42.287887][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 42.293069][ T12] ? rpm_callback+0x230/0x230 [ 42.297723][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 42.303005][ T12] ? __pm_runtime_resume+0x111/0x180 [ 42.308281][ T12] usb_probe_interface+0x305/0x7a0 [ 42.313381][ T12] ? usb_probe_device+0x100/0x100 [ 42.318382][ T12] really_probe+0x281/0x6d0 [ 42.322873][ T12] driver_probe_device+0x104/0x210 [ 42.327963][ T12] __device_attach_driver+0x1c2/0x220 [ 42.333322][ T12] ? driver_allows_async_probing+0x160/0x160 [ 42.339279][ T12] bus_for_each_drv+0x162/0x1e0 [ 42.344118][ T12] ? bus_rescan_devices+0x20/0x20 [ 42.349119][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 42.354909][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 42.360180][ T12] __device_attach+0x217/0x360 [ 42.365010][ T12] ? device_bind_driver+0xd0/0xd0 [ 42.370011][ T12] bus_probe_device+0x1e4/0x290 [ 42.374867][ T12] device_add+0x1480/0x1c20 [ 42.379384][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 42.384660][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 42.390790][ T12] usb_set_configuration+0xe67/0x1740 [ 42.396267][ T12] generic_probe+0x9d/0xd5 [ 42.400680][ T12] usb_probe_device+0x99/0x100 [ 42.405520][ T12] ? usb_suspend+0x620/0x620 [ 42.410097][ T12] really_probe+0x281/0x6d0 [ 42.414678][ T12] driver_probe_device+0x104/0x210 [ 42.419826][ T12] __device_attach_driver+0x1c2/0x220 [ 42.425179][ T12] ? driver_allows_async_probing+0x160/0x160 [ 42.431138][ T12] bus_for_each_drv+0x162/0x1e0 [ 42.435967][ T12] ? bus_rescan_devices+0x20/0x20 [ 42.440970][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 42.446752][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 42.452011][ T12] __device_attach+0x217/0x360 [ 42.456763][ T12] ? device_bind_driver+0xd0/0xd0 [ 42.461852][ T12] bus_probe_device+0x1e4/0x290 [ 42.466692][ T12] device_add+0x1480/0x1c20 [ 42.471185][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 42.477239][ T12] usb_new_device.cold+0x6a4/0xe79 [ 42.482328][ T12] hub_event+0x1e59/0x3860 [ 42.486733][ T12] ? hub_port_debounce+0x260/0x260 [ 42.491843][ T12] ? find_held_lock+0x2d/0x110 [ 42.496592][ T12] ? mark_held_locks+0xe0/0xe0 [ 42.501335][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 42.506861][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 42.512136][ T12] process_one_work+0x92b/0x1530 [ 42.517055][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 42.522418][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 42.527438][ T12] worker_thread+0x96/0xe20 [ 42.531934][ T12] ? process_one_work+0x1530/0x1530 [ 42.537115][ T12] kthread+0x318/0x420 [ 42.541166][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 42.546513][ T12] ret_from_fork+0x24/0x30 [ 42.551592][ T12] Kernel Offset: disabled [ 42.555925][ T12] Rebooting in 86400 seconds..