Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.938124][ T94] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 24.028342][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 24.148647][ T94] usb 1-1: New USB device found, idVendor=2040, idProduct=c60b, bcdDevice=c7.2c [ 24.157828][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 24.167683][ T94] usb 1-1: config 0 descriptor?? [ 24.210049][ T94] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx ATSC+' in warm state [ 24.222334][ T94] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 24.233160][ T94] dvbdev: DVB: registering new adapter (Hauppauge 126xxx ATSC+) [ 24.241026][ T94] usb 1-1: media controller created [ 24.250149][ T94] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 24.265152][ T94] usb 1-1: selecting invalid altsetting 1 [ 24.271091][ T94] set interface failed [ 24.271103][ T94] ------------[ cut here ]------------ [ 24.280679][ T94] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 24.280728][ T94] WARNING: CPU: 1 PID: 94 at kernel/locking/mutex.c:938 __mutex_lock+0xd2c/0x1360 [ 24.295715][ T94] Kernel panic - not syncing: panic_on_warn set ... [ 24.302391][ T94] CPU: 1 PID: 94 Comm: kworker/1:2 Not tainted 5.6.0-rc3-syzkaller #0 [ 24.310517][ T94] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.320560][ T94] Workqueue: usb_hub_wq hub_event [ 24.325559][ T94] Call Trace: [ 24.328834][ T94] dump_stack+0xef/0x16e [ 24.333056][ T94] ? __mutex_lock+0xce0/0x1360 [ 24.337795][ T94] panic+0x2aa/0x6e1 [ 24.341666][ T94] ? add_taint.cold+0x16/0x16 [ 24.346319][ T94] ? __probe_kernel_read+0x188/0x1d0 [ 24.351577][ T94] ? __warn.cold+0x14/0x30 [ 24.355975][ T94] ? __warn+0xd5/0x1c8 [ 24.360029][ T94] ? __mutex_lock+0xd2c/0x1360 [ 24.364793][ T94] __warn.cold+0x2f/0x30 [ 24.369034][ T94] ? __mutex_lock+0xd2c/0x1360 [ 24.373789][ T94] report_bug+0x27b/0x2f0 [ 24.378102][ T94] do_error_trap+0x12b/0x1e0 [ 24.382761][ T94] ? __mutex_lock+0xd2c/0x1360 [ 24.387523][ T94] do_invalid_op+0x32/0x40 [ 24.391946][ T94] ? __mutex_lock+0xd2c/0x1360 [ 24.396729][ T94] invalid_op+0x23/0x30 [ 24.400866][ T94] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 24.406213][ T94] Code: d2 0f 85 f1 05 00 00 44 8b 05 40 c3 57 02 45 85 c0 0f 85 0f f4 ff ff 48 c7 c6 40 cc e6 85 48 c7 c7 40 ca e6 85 e8 4c a2 85 fb <0f> 0b e9 f5 f3 ff ff 65 48 8b 1c 25 00 0f 02 00 be 08 00 00 00 48 [ 24.425797][ T94] RSP: 0018:ffff8881d5cfeec0 EFLAGS: 00010286 [ 24.431891][ T94] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 24.439908][ T94] RDX: 0000000000000000 RSI: ffffffff812977dd RDI: ffffed103ab9fdca [ 24.447874][ T94] RBP: ffff8881d5cff030 R08: ffff8881d6a91880 R09: fffffbfff0e1fbe1 [ 24.455830][ T94] R10: fffffbfff0e1fbe0 R11: ffffffff870fdf03 R12: 0000000000000000 [ 24.463794][ T94] R13: dffffc0000000000 R14: ffff8881ce7791c8 R15: 0000000000000001 [ 24.471760][ T94] ? vprintk_func+0x7d/0x113 [ 24.476337][ T94] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 24.481366][ T94] ? find_held_lock+0x2d/0x110 [ 24.486132][ T94] ? vprintk_emit+0xe2/0x3d0 [ 24.490720][ T94] ? mutex_trylock+0x2c0/0x2c0 [ 24.495474][ T94] ? mark_lock+0xbc/0x1160 [ 24.499879][ T94] ? mark_held_locks+0x9f/0xe0 [ 24.504629][ T94] ? vprintk_emit+0x112/0x3d0 [ 24.509304][ T94] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 24.514314][ T94] mxl111sf_ctrl_msg+0xc2/0x240 [ 24.519187][ T94] mxl111sf_write_reg+0x9a/0x150 [ 24.524132][ T94] ? mxl111sf_frontend_attach_mercury_mh+0x9b0/0x9b0 [ 24.530790][ T94] ? usb_set_interface+0x7ab/0xad0 [ 24.535894][ T94] mxl1x1sf_soft_reset+0x6b/0x190 [ 24.540900][ T94] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x24d/0x7c0 [ 24.548260][ T94] ? mxl111sf_lg2160_frontend_attach+0x930/0x930 [ 24.554574][ T94] mxl111sf_frontend_attach_atsc_mh+0x22/0xa0 [ 24.560632][ T94] dvb_usbv2_probe.cold+0x2826/0x2efe [ 24.565983][ T94] ? dvb_usb_start_feed+0xff0/0xff0 [ 24.571180][ T94] ? rpm_callback+0x230/0x230 [ 24.576188][ T94] ? lockdep_hardirqs_on+0x382/0x580 [ 24.581456][ T94] ? __pm_runtime_resume+0x111/0x180 [ 24.586734][ T94] usb_probe_interface+0x310/0x800 [ 24.591915][ T94] ? usb_probe_device+0x230/0x230 [ 24.596916][ T94] really_probe+0x290/0xac0 [ 24.601397][ T94] driver_probe_device+0x223/0x350 [ 24.606481][ T94] __device_attach_driver+0x1d1/0x290 [ 24.611829][ T94] ? driver_allows_async_probing+0x160/0x160 [ 24.617783][ T94] bus_for_each_drv+0x162/0x1e0 [ 24.622620][ T94] ? bus_rescan_devices+0x20/0x20 [ 24.627631][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.633422][ T94] ? lockdep_hardirqs_on+0x382/0x580 [ 24.638687][ T94] __device_attach+0x217/0x390 [ 24.643433][ T94] ? device_bind_driver+0xd0/0xd0 [ 24.648436][ T94] bus_probe_device+0x1e4/0x290 [ 24.653330][ T94] device_add+0x1459/0x1bf0 [ 24.657822][ T94] ? wait_for_completion+0x3c0/0x3c0 [ 24.663091][ T94] ? device_link_remove+0x110/0x110 [ 24.668268][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.674067][ T94] usb_set_configuration+0xe47/0x17d0 [ 24.679432][ T94] usb_generic_driver_probe+0x9d/0xe0 [ 24.684783][ T94] usb_probe_device+0xd9/0x230 [ 24.689545][ T94] ? usb_suspend+0x5f0/0x5f0 [ 24.694154][ T94] really_probe+0x290/0xac0 [ 24.698636][ T94] driver_probe_device+0x223/0x350 [ 24.703735][ T94] __device_attach_driver+0x1d1/0x290 [ 24.709088][ T94] ? driver_allows_async_probing+0x160/0x160 [ 24.715044][ T94] bus_for_each_drv+0x162/0x1e0 [ 24.719873][ T94] ? bus_rescan_devices+0x20/0x20 [ 24.724873][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.730652][ T94] ? lockdep_hardirqs_on+0x382/0x580 [ 24.735921][ T94] __device_attach+0x217/0x390 [ 24.740680][ T94] ? device_bind_driver+0xd0/0xd0 [ 24.745692][ T94] bus_probe_device+0x1e4/0x290 [ 24.750527][ T94] device_add+0x1459/0x1bf0 [ 24.755007][ T94] ? device_link_remove+0x110/0x110 [ 24.760200][ T94] usb_new_device.cold+0x540/0xcd0 [ 24.765288][ T94] hub_event+0x21cb/0x4300 [ 24.769692][ T94] ? hub_port_debounce+0x350/0x350 [ 24.774785][ T94] ? find_held_lock+0x2d/0x110 [ 24.779527][ T94] ? mark_held_locks+0xe0/0xe0 [ 24.784354][ T94] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 24.789894][ T94] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 24.795170][ T94] process_one_work+0x94b/0x1620 [ 24.800167][ T94] ? pwq_dec_nr_in_flight+0x310/0x310 [ 24.805540][ T94] ? do_raw_spin_lock+0x129/0x290 [ 24.810629][ T94] worker_thread+0x96/0xe20 [ 24.815118][ T94] ? process_one_work+0x1620/0x1620 [ 24.820294][ T94] kthread+0x318/0x420 [ 24.824345][ T94] ? kthread_create_on_node+0xf0/0xf0 [ 24.829694][ T94] ret_from_fork+0x24/0x30 [ 24.834513][ T94] Kernel Offset: disabled [ 24.838840][ T94] Rebooting in 86400 seconds..