INIT: Entering runlevel: 2 [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[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.858117][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 28.098083][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 28.218214][ T12] usb 1-1: config 7 interface 0 altsetting 8 has an invalid endpoint descriptor of length 2, skipping [ 28.229593][ T12] usb 1-1: config 7 interface 0 altsetting 8 has 1 endpoint descriptor, different from the interface descriptor's value: 0 [ 28.243652][ T12] usb 1-1: config 7 interface 0 has no altsetting 0 [ 28.250505][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=c653, bcdDevice=f5.2e [ 28.259644][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 28.310217][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx ATSC+' in warm state [ 28.320357][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 28.331177][ T12] dvbdev: DVB: registering new adapter (Hauppauge 126xxx ATSC+) [ 28.339034][ T12] usb 1-1: media controller created [ 28.347824][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 28.363401][ T12] usb 1-1: selecting invalid altsetting 1 [ 28.369351][ T12] set interface failed [ 28.369359][ T12] ------------[ cut here ]------------ [ 28.379133][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 28.379177][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912 __mutex_lock+0xd31/0x1360 [ 28.394408][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 28.400976][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 28.408337][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.418834][ T12] Workqueue: usb_hub_wq hub_event [ 28.423855][ T12] Call Trace: [ 28.427130][ T12] dump_stack+0xca/0x13e [ 28.431358][ T12] ? __mutex_lock+0xd20/0x1360 [ 28.436107][ T12] panic+0x2a3/0x6da [ 28.439985][ T12] ? add_taint.cold+0x16/0x16 [ 28.444662][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 28.449929][ T12] ? __warn.cold+0x5/0x4a [ 28.454238][ T12] ? __warn+0xe3/0x1e0 [ 28.458287][ T12] ? __mutex_lock+0xd31/0x1360 [ 28.463034][ T12] __warn.cold+0x20/0x4a [ 28.467262][ T12] ? __mutex_lock+0xd31/0x1360 [ 28.472020][ T12] report_bug+0x262/0x2a0 [ 28.476330][ T12] do_error_trap+0x12b/0x1e0 [ 28.480923][ T12] ? __mutex_lock+0xd31/0x1360 [ 28.485918][ T12] do_invalid_op+0x32/0x40 [ 28.490327][ T12] ? __mutex_lock+0xd31/0x1360 [ 28.495075][ T12] invalid_op+0x23/0x30 [ 28.499210][ T12] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 28.504558][ T12] Code: d2 0f 85 f6 05 00 00 44 8b 05 bb d9 1c 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 20 96 c6 85 48 c7 c7 c0 93 c6 85 e8 d4 a2 a6 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 28.524315][ T12] RSP: 0018:ffff8881da20ef40 EFLAGS: 00010282 [ 28.530354][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 28.538312][ T12] RDX: 0000000000000000 RSI: ffffffff81288ddd RDI: ffffed103b441dda [ 28.546274][ T12] RBP: ffff8881da20f0b0 R08: ffff8881da1f9800 R09: fffffbfff0d9ee75 [ 28.555183][ T12] R10: fffffbfff0d9ee74 R11: ffffffff86cf73a3 R12: 0000000000000000 [ 28.563320][ T12] R13: dffffc0000000000 R14: ffff8881d32c0ac8 R15: ffff8881d32c0ac8 [ 28.571288][ T12] ? vprintk_func+0x7d/0x113 [ 28.575855][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 28.580859][ T12] ? find_held_lock+0x2d/0x110 [ 28.585615][ T12] ? vprintk_emit+0xe2/0x3e0 [ 28.590187][ T12] ? mutex_trylock+0x2c0/0x2c0 [ 28.594931][ T12] ? mark_lock+0xbc/0x1130 [ 28.599334][ T12] ? mark_held_locks+0x9f/0xe0 [ 28.604073][ T12] ? vprintk_emit+0x112/0x3e0 [ 28.608724][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 28.613725][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 28.618555][ T12] mxl111sf_write_reg+0x8b/0x120 [ 28.623467][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 28.630132][ T12] ? usb_set_interface+0x79c/0xa50 [ 28.636180][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 28.641182][ T12] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 28.648544][ T12] mxl111sf_frontend_attach_atsc_mh+0x13/0x70 [ 28.654594][ T12] ? mxl111sf_lg2160_frontend_attach+0x900/0x900 [ 28.660903][ T12] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 28.666256][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 28.671950][ T12] ? rpm_callback+0x230/0x230 [ 28.676716][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 28.681987][ T12] ? __pm_runtime_resume+0x111/0x180 [ 28.687243][ T12] usb_probe_interface+0x305/0x7a0 [ 28.692327][ T12] ? usb_probe_device+0x100/0x100 [ 28.697325][ T12] really_probe+0x281/0x6d0 [ 28.701822][ T12] driver_probe_device+0x101/0x1b0 [ 28.706962][ T12] __device_attach_driver+0x1c2/0x220 [ 28.712331][ T12] ? driver_allows_async_probing+0x160/0x160 [ 28.718299][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.723146][ T12] ? bus_rescan_devices+0x20/0x20 [ 28.728161][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 28.733953][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 28.739225][ T12] __device_attach+0x217/0x360 [ 28.743962][ T12] ? device_bind_driver+0xd0/0xd0 [ 28.748962][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 28.754219][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 28.759488][ T12] bus_probe_device+0x1e4/0x290 [ 28.764673][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 28.770550][ T12] device_add+0xae6/0x16f0 [ 28.774937][ T12] ? uevent_store+0x50/0x50 [ 28.779462][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 28.785405][ T12] usb_set_configuration+0xdf6/0x1670 [ 28.790764][ T12] generic_probe+0x9d/0xd5 [ 28.795157][ T12] usb_probe_device+0x99/0x100 [ 28.799907][ T12] ? usb_suspend+0x620/0x620 [ 28.804491][ T12] really_probe+0x281/0x6d0 [ 28.809147][ T12] driver_probe_device+0x101/0x1b0 [ 28.814240][ T12] __device_attach_driver+0x1c2/0x220 [ 28.819781][ T12] ? driver_allows_async_probing+0x160/0x160 [ 28.825795][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.830639][ T12] ? bus_rescan_devices+0x20/0x20 [ 28.835663][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 28.841447][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 28.846706][ T12] __device_attach+0x217/0x360 [ 28.851454][ T12] ? device_bind_driver+0xd0/0xd0 [ 28.856461][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 28.861903][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 28.867438][ T12] bus_probe_device+0x1e4/0x290 [ 28.872276][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 28.879195][ T12] device_add+0xae6/0x16f0 [ 28.883593][ T12] ? uevent_store+0x50/0x50 [ 28.888076][ T12] usb_new_device.cold+0x6a4/0xe79 [ 28.894267][ T12] hub_event+0x1b5c/0x3640 [ 28.898706][ T12] ? hub_port_debounce+0x260/0x260 [ 28.903794][ T12] process_one_work+0x92b/0x1530 [ 28.908709][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 28.914069][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 28.919186][ T12] worker_thread+0x96/0xe20 [ 28.923670][ T12] ? process_one_work+0x1530/0x1530 [ 28.928887][ T12] kthread+0x318/0x420 [ 28.933000][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 28.938420][ T12] ret_from_fork+0x24/0x30 [ 28.943715][ T12] Kernel Offset: disabled [ 28.948069][ T12] Rebooting in 86400 seconds..