[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 14.301616][ C1] random: crng init done [ 14.305959][ C1] random: 7 urandom warning(s) missed due to ratelimiting Warning: Permanently added '10.128.0.149' (ECDSA) to the list of known hosts. executing program [ 45.646391][ T162] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 45.856420][ T162] usb 1-1: config 0 interface 0 has no altsetting 0 [ 45.863091][ T162] usb 1-1: New USB device found, idVendor=2040, idProduct=c60c, bcdDevice=a6.45 [ 45.872180][ T162] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 45.881817][ T162] usb 1-1: config 0 descriptor?? [ 45.928574][ T162] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx DVBT' in warm state [ 45.938334][ T162] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 45.949301][ T162] dvbdev: DVB: registering new adapter (Hauppauge 126xxx DVBT) [ 45.957248][ T162] usb 1-1: media controller created [ 45.966092][ T162] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 45.981981][ T162] usb 1-1: selecting invalid altsetting 2 [ 45.987876][ T162] set interface failed [ 45.994457][ T162] ------------[ cut here ]------------ [ 46.004061][ T162] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 46.004115][ T162] WARNING: CPU: 0 PID: 162 at kernel/locking/mutex.c:938 __mutex_lock+0xd2c/0x1360 [ 46.019214][ T162] Kernel panic - not syncing: panic_on_warn set ... [ 46.025776][ T162] CPU: 0 PID: 162 Comm: kworker/0:3 Not tainted 5.7.0-rc1-syzkaller #0 [ 46.033989][ T162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.044045][ T162] Workqueue: usb_hub_wq hub_event [ 46.049044][ T162] Call Trace: [ 46.052310][ T162] dump_stack+0xef/0x16e [ 46.056541][ T162] ? __mutex_lock+0xcd0/0x1360 [ 46.061985][ T162] panic+0x2aa/0x6e1 [ 46.065865][ T162] ? add_taint.cold+0x16/0x16 [ 46.070527][ T162] ? __probe_kernel_read+0x188/0x1d0 [ 46.075792][ T162] ? __warn.cold+0x14/0x30 [ 46.080192][ T162] ? __warn+0xd5/0x1c8 [ 46.084232][ T162] ? __mutex_lock+0xd2c/0x1360 [ 46.088971][ T162] __warn.cold+0x2f/0x30 [ 46.093196][ T162] ? __mutex_lock+0xd2c/0x1360 [ 46.097932][ T162] report_bug+0x27b/0x2f0 [ 46.102239][ T162] do_error_trap+0x12b/0x1e0 [ 46.106818][ T162] ? __mutex_lock+0xd2c/0x1360 [ 46.111564][ T162] do_invalid_op+0x32/0x40 [ 46.115949][ T162] ? __mutex_lock+0xd2c/0x1360 [ 46.120696][ T162] invalid_op+0x23/0x30 [ 46.124823][ T162] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 46.130188][ T162] Code: d2 0f 85 f1 05 00 00 44 8b 05 70 44 53 02 45 85 c0 0f 85 0f f4 ff ff 48 c7 c6 a0 e7 e6 85 48 c7 c7 a0 e5 e6 85 e8 7c c8 7e fb <0f> 0b e9 f5 f3 ff ff 65 48 8b 1c 25 40 0f 02 00 be 08 00 00 00 48 [ 46.149850][ T162] RSP: 0018:ffff8881ceb5ee20 EFLAGS: 00010286 [ 46.155889][ T162] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 46.163832][ T162] RDX: 0000000000000000 RSI: ffffffff812a2d8d RDI: ffffed1039d6bdb6 [ 46.171775][ T162] RBP: ffff8881ceb5ef90 R08: ffff8881cf694a40 R09: fffffbfff0e20b9d [ 46.179718][ T162] R10: ffffffff87105ce3 R11: fffffbfff0e20b9c R12: 0000000000000000 [ 46.187921][ T162] R13: dffffc0000000000 R14: ffff8881ccd7c9d8 R15: 0000000000000001 [ 46.195873][ T162] ? vprintk_func+0x7d/0x113 [ 46.200441][ T162] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 46.205434][ T162] ? mark_lock+0x12b/0x1510 [ 46.209925][ T162] ? vprintk_emit+0xe2/0x3e0 [ 46.214487][ T162] ? mutex_trylock+0x2c0/0x2c0 [ 46.219223][ T162] ? print_usage_bug+0x200/0x200 [ 46.224143][ T162] ? lock_downgrade+0x720/0x720 [ 46.228980][ T162] ? mark_held_locks+0x9f/0xe0 [ 46.233713][ T162] ? vprintk_emit+0x10e/0x3e0 [ 46.238366][ T162] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 46.243361][ T162] mxl111sf_ctrl_msg+0xc2/0x240 [ 46.248188][ T162] mxl111sf_write_reg+0x9a/0x150 [ 46.253104][ T162] ? mxl111sf_frontend_attach_mercury_mh+0x9b0/0x9b0 [ 46.259754][ T162] ? usb_set_interface+0x7ab/0xad0 [ 46.264843][ T162] mxl1x1sf_soft_reset+0x6b/0x190 [ 46.269863][ T162] mxl111sf_attach_demod+0x28a/0x750 [ 46.275198][ T162] ? mxl111sf_attach_demod+0x750/0x750 [ 46.280644][ T162] dvb_usbv2_probe.cold+0x2835/0x2f0e [ 46.286014][ T162] ? dvb_usb_start_feed+0xff0/0xff0 [ 46.291202][ T162] ? rpm_callback+0x230/0x230 [ 46.295854][ T162] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 46.301112][ T162] ? __pm_runtime_resume+0x111/0x180 [ 46.306380][ T162] usb_probe_interface+0x310/0x800 [ 46.311501][ T162] ? usb_probe_device+0x230/0x230 [ 46.316500][ T162] really_probe+0x290/0xac0 [ 46.320976][ T162] driver_probe_device+0x223/0x350 [ 46.326057][ T162] __device_attach_driver+0x1d1/0x290 [ 46.331401][ T162] ? driver_allows_async_probing+0x160/0x160 [ 46.337349][ T162] bus_for_each_drv+0x162/0x1e0 [ 46.342170][ T162] ? bus_rescan_devices+0x20/0x20 [ 46.347176][ T162] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.352989][ T162] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 46.358380][ T162] __device_attach+0x21a/0x390 [ 46.363124][ T162] ? device_bind_driver+0xd0/0xd0 [ 46.368138][ T162] bus_probe_device+0x1e4/0x290 [ 46.372970][ T162] device_add+0x1367/0x1c20 [ 46.377458][ T162] ? wait_for_completion+0x280/0x280 [ 46.382736][ T162] ? device_link_remove+0x110/0x110 [ 46.387917][ T162] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.393713][ T162] usb_set_configuration+0xed4/0x1850 [ 46.399073][ T162] usb_generic_driver_probe+0x9d/0xe0 [ 46.404443][ T162] usb_probe_device+0xd9/0x230 [ 46.409873][ T162] ? usb_suspend+0x600/0x600 [ 46.414436][ T162] really_probe+0x290/0xac0 [ 46.418925][ T162] driver_probe_device+0x223/0x350 [ 46.424017][ T162] __device_attach_driver+0x1d1/0x290 [ 46.429380][ T162] ? driver_allows_async_probing+0x160/0x160 [ 46.435337][ T162] bus_for_each_drv+0x162/0x1e0 [ 46.440184][ T162] ? bus_rescan_devices+0x20/0x20 [ 46.445208][ T162] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 46.450988][ T162] ? lockdep_hardirqs_on+0x3c7/0x5d0 [ 46.456245][ T162] __device_attach+0x21a/0x390 [ 46.460982][ T162] ? device_bind_driver+0xd0/0xd0 [ 46.466240][ T162] bus_probe_device+0x1e4/0x290 [ 46.471087][ T162] device_add+0x1367/0x1c20 [ 46.475562][ T162] ? device_link_remove+0x110/0x110 [ 46.480747][ T162] usb_new_device.cold+0x552/0xf6e [ 46.485831][ T162] ? hub_disconnect+0x4a0/0x4a0 [ 46.490656][ T162] ? mark_held_locks+0x9f/0xe0 [ 46.495404][ T162] ? _raw_spin_unlock_irq+0x1f/0x30 [ 46.500574][ T162] hub_event+0x226d/0x43c0 [ 46.504966][ T162] ? hub_port_debounce+0x350/0x350 [ 46.510064][ T162] ? umh_clean_and_save_pid+0x1/0xd0 [ 46.515322][ T162] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 46.520838][ T162] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 46.526095][ T162] ? _raw_spin_unlock_irq+0x1f/0x30 [ 46.531277][ T162] process_one_work+0x965/0x1630 [ 46.536197][ T162] ? lock_release+0x720/0x720 [ 46.540854][ T162] ? pwq_dec_nr_in_flight+0x310/0x310 [ 46.546200][ T162] ? rwlock_bug.part.0+0x90/0x90 [ 46.551121][ T162] worker_thread+0x96/0xe20 [ 46.555617][ T162] ? process_one_work+0x1630/0x1630 [ 46.560788][ T162] kthread+0x326/0x430 [ 46.564830][ T162] ? kthread_create_on_node+0xf0/0xf0 [ 46.570183][ T162] ret_from_fork+0x24/0x30 [ 46.575327][ T162] Kernel Offset: disabled [ 46.579653][ T162] Rebooting in 86400 seconds..