Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.662388][ T95] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.752588][ T95] usb 1-1: Using ep0 maxpacket: 8 [ 26.032478][ T95] usb 1-1: New USB device found, idVendor=2040, idProduct=b767, bcdDevice=a1.b8 [ 26.041717][ T95] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 26.049863][ T95] usb 1-1: Product: syz [ 26.054092][ T95] usb 1-1: Manufacturer: syz [ 26.058667][ T95] usb 1-1: SerialNumber: syz [ 26.065001][ T95] usb 1-1: config 0 descriptor?? [ 26.103913][ T95] usb 1-1: dvb_usb_v2: found a 'Hauppauge 117xxx ATSC+' in warm state [ 26.113406][ T95] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 26.124005][ T95] dvbdev: DVB: registering new adapter (Hauppauge 117xxx ATSC+) [ 26.131750][ T95] usb 1-1: media controller created [ 26.140625][ T95] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 26.153356][ T95] usb 1-1: selecting invalid altsetting 1 [ 26.159082][ T95] set interface failed [ 26.159087][ T95] ------------[ cut here ]------------ [ 26.168642][ T95] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 26.168677][ T95] WARNING: CPU: 0 PID: 95 at kernel/locking/mutex.c:938 __mutex_lock+0xd2c/0x1360 [ 26.183627][ T95] Kernel panic - not syncing: panic_on_warn set ... [ 26.190258][ T95] CPU: 0 PID: 95 Comm: kworker/0:2 Not tainted 5.6.0-rc3-syzkaller #0 [ 26.198427][ T95] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.208471][ T95] Workqueue: usb_hub_wq hub_event [ 26.213470][ T95] Call Trace: [ 26.216741][ T95] dump_stack+0xef/0x16e [ 26.220962][ T95] ? __mutex_lock+0xce0/0x1360 [ 26.225735][ T95] panic+0x2aa/0x6e1 [ 26.229652][ T95] ? add_taint.cold+0x16/0x16 [ 26.234307][ T95] ? __probe_kernel_read+0x188/0x1d0 [ 26.239578][ T95] ? __warn.cold+0x14/0x30 [ 26.244007][ T95] ? __warn+0xd5/0x1c8 [ 26.248064][ T95] ? __mutex_lock+0xd2c/0x1360 [ 26.252828][ T95] __warn.cold+0x2f/0x30 [ 26.257076][ T95] ? __mutex_lock+0xd2c/0x1360 [ 26.261854][ T95] report_bug+0x27b/0x2f0 [ 26.266187][ T95] do_error_trap+0x12b/0x1e0 [ 26.270755][ T95] ? __mutex_lock+0xd2c/0x1360 [ 26.275495][ T95] do_invalid_op+0x32/0x40 [ 26.279886][ T95] ? __mutex_lock+0xd2c/0x1360 [ 26.284624][ T95] invalid_op+0x23/0x30 [ 26.288754][ T95] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 26.294117][ T95] 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 [ 26.313708][ T95] RSP: 0018:ffff8881d5b6eec0 EFLAGS: 00010286 [ 26.319757][ T95] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 26.327714][ T95] RDX: 0000000000000000 RSI: ffffffff812977dd RDI: ffffed103ab6ddca [ 26.335660][ T95] RBP: ffff8881d5b6f030 R08: ffff8881d711c980 R09: fffffbfff0e1fbe1 [ 26.343608][ T95] R10: fffffbfff0e1fbe0 R11: ffffffff870fdf03 R12: 0000000000000000 [ 26.351556][ T95] R13: dffffc0000000000 R14: ffff8881cdeec1c8 R15: 0000000000000001 [ 26.359522][ T95] ? vprintk_func+0x7d/0x113 [ 26.364103][ T95] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 26.369123][ T95] ? find_held_lock+0x2d/0x110 [ 26.373948][ T95] ? vprintk_emit+0xe2/0x3d0 [ 26.378524][ T95] ? mutex_trylock+0x2c0/0x2c0 [ 26.383263][ T95] ? mark_lock+0xbc/0x1160 [ 26.387668][ T95] ? mark_held_locks+0x9f/0xe0 [ 26.392420][ T95] ? vprintk_emit+0x112/0x3d0 [ 26.397072][ T95] ? mxl111sf_ctrl_msg+0xc2/0x240 [ 26.402081][ T95] mxl111sf_ctrl_msg+0xc2/0x240 [ 26.406907][ T95] mxl111sf_write_reg+0x9a/0x150 [ 26.411819][ T95] ? mxl111sf_frontend_attach_mercury_mh+0x9b0/0x9b0 [ 26.418467][ T95] ? usb_set_interface+0x7ab/0xad0 [ 26.423552][ T95] mxl1x1sf_soft_reset+0x6b/0x190 [ 26.428554][ T95] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x24d/0x7c0 [ 26.435924][ T95] ? mxl111sf_lg2160_frontend_attach+0x930/0x930 [ 26.442244][ T95] mxl111sf_frontend_attach_atsc_mh+0x22/0xa0 [ 26.448305][ T95] dvb_usbv2_probe.cold+0x2826/0x2efe [ 26.453739][ T95] ? dvb_usb_start_feed+0xff0/0xff0 [ 26.458929][ T95] ? rpm_callback+0x230/0x230 [ 26.463618][ T95] ? lockdep_hardirqs_on+0x382/0x580 [ 26.468886][ T95] ? __pm_runtime_resume+0x111/0x180 [ 26.474150][ T95] usb_probe_interface+0x310/0x800 [ 26.479258][ T95] ? usb_probe_device+0x230/0x230 [ 26.484277][ T95] really_probe+0x290/0xac0 [ 26.488755][ T95] driver_probe_device+0x223/0x350 [ 26.493842][ T95] __device_attach_driver+0x1d1/0x290 [ 26.499208][ T95] ? driver_allows_async_probing+0x160/0x160 [ 26.505164][ T95] bus_for_each_drv+0x162/0x1e0 [ 26.510014][ T95] ? bus_rescan_devices+0x20/0x20 [ 26.515012][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 26.520809][ T95] ? lockdep_hardirqs_on+0x382/0x580 [ 26.526085][ T95] __device_attach+0x217/0x390 [ 26.530822][ T95] ? device_bind_driver+0xd0/0xd0 [ 26.535835][ T95] bus_probe_device+0x1e4/0x290 [ 26.540672][ T95] device_add+0x1459/0x1bf0 [ 26.545279][ T95] ? wait_for_completion+0x3c0/0x3c0 [ 26.550606][ T95] ? device_link_remove+0x110/0x110 [ 26.555897][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 26.561688][ T95] usb_set_configuration+0xe47/0x17d0 [ 26.567094][ T95] usb_generic_driver_probe+0x9d/0xe0 [ 26.572475][ T95] usb_probe_device+0xd9/0x230 [ 26.577238][ T95] ? usb_suspend+0x5f0/0x5f0 [ 26.581804][ T95] really_probe+0x290/0xac0 [ 26.586300][ T95] driver_probe_device+0x223/0x350 [ 26.591404][ T95] __device_attach_driver+0x1d1/0x290 [ 26.596753][ T95] ? driver_allows_async_probing+0x160/0x160 [ 26.602722][ T95] bus_for_each_drv+0x162/0x1e0 [ 26.607552][ T95] ? bus_rescan_devices+0x20/0x20 [ 26.612553][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 26.618334][ T95] ? lockdep_hardirqs_on+0x382/0x580 [ 26.623592][ T95] __device_attach+0x217/0x390 [ 26.628329][ T95] ? device_bind_driver+0xd0/0xd0 [ 26.633345][ T95] bus_probe_device+0x1e4/0x290 [ 26.638182][ T95] device_add+0x1459/0x1bf0 [ 26.642677][ T95] ? device_link_remove+0x110/0x110 [ 26.647850][ T95] usb_new_device.cold+0x540/0xcd0 [ 26.652934][ T95] hub_event+0x21cb/0x4300 [ 26.657325][ T95] ? hub_port_debounce+0x350/0x350 [ 26.662426][ T95] ? find_held_lock+0x2d/0x110 [ 26.667177][ T95] ? mark_held_locks+0xe0/0xe0 [ 26.672966][ T95] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 26.678504][ T95] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 26.683788][ T95] process_one_work+0x94b/0x1620 [ 26.688739][ T95] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.694122][ T95] ? do_raw_spin_lock+0x129/0x290 [ 26.699129][ T95] worker_thread+0x96/0xe20 [ 26.703615][ T95] ? process_one_work+0x1620/0x1620 [ 26.708817][ T95] kthread+0x318/0x420 [ 26.712867][ T95] ? kthread_create_on_node+0xf0/0xf0 [ 26.718218][ T95] ret_from_fork+0x24/0x30 [ 26.723172][ T95] Kernel Offset: disabled [ 26.727516][ T95] Rebooting in 86400 seconds..