[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. [ 14.713508][ C1] random: crng init done [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.242' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.940091][ T22] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 26.180041][ T22] usb 1-1: Using ep0 maxpacket: 16 [ 26.300138][ T22] usb 1-1: config 1 has an invalid interface number: 39 but max is 1 [ 26.308358][ T22] usb 1-1: config 1 has an invalid interface descriptor of length 2, skipping [ 26.317421][ T22] usb 1-1: config 1 contains an unexpected descriptor of type 0x1, skipping [ 26.326122][ T22] usb 1-1: config 1 contains an unexpected descriptor of type 0x1, skipping [ 26.334807][ T22] usb 1-1: config 1 has no interface number 1 [ 26.340907][ T22] usb 1-1: config 1 interface 39 altsetting 249 endpoint 0xD has invalid maxpacket 530, setting to 64 [ 26.351858][ T22] usb 1-1: config 1 interface 39 altsetting 249 endpoint 0xC has invalid maxpacket 843, setting to 64 [ 26.362818][ T22] usb 1-1: config 1 interface 0 altsetting 4 endpoint 0x7 has an invalid bInterval 24, changing to 7 [ 26.373679][ T22] usb 1-1: config 1 interface 0 altsetting 4 has an invalid endpoint with address 0x80, skipping [ 26.384181][ T22] usb 1-1: config 1 interface 0 altsetting 4 has an invalid endpoint with address 0x25, skipping [ 26.394693][ T22] usb 1-1: config 1 interface 0 altsetting 4 endpoint 0x88 has invalid maxpacket 832, setting to 64 [ 26.405513][ T22] usb 1-1: config 1 interface 0 altsetting 4 endpoint 0x6 has invalid maxpacket 653, setting to 64 [ 26.416197][ T22] usb 1-1: config 1 interface 0 altsetting 4 endpoint 0x5 has invalid maxpacket 783, setting to 64 [ 26.426869][ T22] usb 1-1: config 1 interface 39 has no altsetting 0 [ 26.433559][ T22] usb 1-1: config 1 interface 0 has no altsetting 0 [ 26.600199][ T22] usb 1-1: New USB device found, idVendor=2040, idProduct=d863, bcdDevice=1b.59 [ 26.609312][ T22] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 26.617380][ T22] usb 1-1: Product: syz [ 26.621554][ T22] usb 1-1: Manufacturer: syz [ 26.626254][ T22] usb 1-1: SerialNumber: syz executing program [ 26.961054][ T22] usb 1-1: dvb_usb_v2: found a 'Hauppauge Mercury' in warm state [ 26.969926][ T22] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 26.980546][ T22] dvbdev: DVB: registering new adapter (Hauppauge Mercury) [ 26.987814][ T22] usb 1-1: media controller created [ 26.996920][ T22] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 27.010148][ T22] usb 1-1: selecting invalid altsetting 1 [ 27.015897][ T22] set interface failed [ 27.015903][ T22] ------------[ cut here ]------------ [ 27.025413][ T22] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 27.025445][ T22] WARNING: CPU: 1 PID: 22 at kernel/locking/mutex.c:938 __mutex_lock+0xd31/0x1360 [ 27.040381][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 27.046946][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.4.0-rc6+ #0 [ 27.054372][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.064410][ T22] Workqueue: usb_hub_wq hub_event [ 27.069404][ T22] Call Trace: [ 27.072696][ T22] dump_stack+0xca/0x13e [ 27.076916][ T22] ? __mutex_lock+0xcd0/0x1360 [ 27.081653][ T22] panic+0x2aa/0x6e1 [ 27.085529][ T22] ? add_taint.cold+0x16/0x16 [ 27.090183][ T22] ? __probe_kernel_read+0x188/0x1d0 [ 27.095440][ T22] ? __warn.cold+0x14/0x33 [ 27.099830][ T22] ? __warn+0xd5/0x1d0 [ 27.103873][ T22] ? __mutex_lock+0xd31/0x1360 [ 27.108608][ T22] __warn.cold+0x2f/0x33 [ 27.112823][ T22] ? __mutex_lock+0xd31/0x1360 [ 27.117575][ T22] report_bug+0x27b/0x2f0 [ 27.121880][ T22] do_error_trap+0x12b/0x1e0 [ 27.126442][ T22] ? __mutex_lock+0xd31/0x1360 [ 27.131193][ T22] do_invalid_op+0x32/0x40 [ 27.135612][ T22] ? __mutex_lock+0xd31/0x1360 [ 27.140356][ T22] invalid_op+0x23/0x30 [ 27.144490][ T22] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 27.149836][ T22] Code: d2 0f 85 f6 05 00 00 44 8b 05 ab 6a 17 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 a0 8a c6 85 48 c7 c7 a0 88 c6 85 e8 34 c2 a4 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 27.169422][ T22] RSP: 0018:ffff8881d932eef0 EFLAGS: 00010282 [ 27.175472][ T22] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 27.183420][ T22] RDX: 0000000000000000 RSI: ffffffff8128c9cd RDI: ffffed103b265dd0 [ 27.191405][ T22] RBP: ffff8881d932f060 R08: ffff8881da24e000 R09: fffffbfff0d9e975 [ 27.199365][ T22] R10: fffffbfff0d9e974 R11: ffffffff86cf4ba3 R12: 0000000000000000 [ 27.207313][ T22] R13: dffffc0000000000 R14: ffff8881c6b8e9c8 R15: ffff8881c6b8e9c8 [ 27.215271][ T22] ? vprintk_func+0x7d/0x113 [ 27.219842][ T22] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 27.224842][ T22] ? find_held_lock+0x2d/0x110 [ 27.229579][ T22] ? vprintk_emit+0xe2/0x3e0 [ 27.234143][ T22] ? mutex_trylock+0x2c0/0x2c0 [ 27.238878][ T22] ? mark_lock+0xbc/0x1160 [ 27.243266][ T22] ? mark_held_locks+0x9f/0xe0 [ 27.248009][ T22] ? vprintk_emit+0x112/0x3e0 [ 27.252666][ T22] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 27.257671][ T22] mxl111sf_ctrl_msg+0xb8/0x210 [ 27.262495][ T22] mxl111sf_write_reg+0x8b/0x120 [ 27.267407][ T22] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 27.274054][ T22] ? usb_set_interface+0x79c/0xa50 [ 27.279141][ T22] mxl1x1sf_soft_reset+0x6b/0x190 [ 27.284141][ T22] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 27.291487][ T22] mxl111sf_frontend_attach_mercury+0x13/0x70 [ 27.297528][ T22] ? mxl111sf_lg2161_ep6_frontend_attach+0x960/0x960 [ 27.304188][ T22] dvb_usbv2_probe.cold+0x1e04/0x2567 [ 27.309541][ T22] ? dvb_usb_start_feed+0xb60/0xb60 [ 27.314722][ T22] ? rpm_callback+0x230/0x230 [ 27.319375][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 27.324636][ T22] ? __pm_runtime_resume+0x111/0x180 [ 27.329896][ T22] usb_probe_interface+0x305/0x7a0 [ 27.334984][ T22] ? usb_probe_device+0x100/0x100 [ 27.339996][ T22] really_probe+0x281/0x6d0 [ 27.344476][ T22] driver_probe_device+0x104/0x210 [ 27.349562][ T22] __device_attach_driver+0x1c2/0x220 [ 27.354913][ T22] ? driver_allows_async_probing+0x160/0x160 [ 27.360868][ T22] bus_for_each_drv+0x162/0x1e0 [ 27.365696][ T22] ? bus_rescan_devices+0x20/0x20 [ 27.370695][ T22] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 27.376481][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 27.381741][ T22] __device_attach+0x217/0x360 [ 27.386486][ T22] ? device_bind_driver+0xd0/0xd0 [ 27.391500][ T22] ? kobject_uevent_env+0x29e/0x1160 [ 27.396759][ T22] ? kobject_uevent_env+0x2a8/0x1160 [ 27.402017][ T22] bus_probe_device+0x1e4/0x290 [ 27.406842][ T22] ? blocking_notifier_call_chain+0x54/0xa0 [ 27.412708][ T22] device_add+0xae6/0x16f0 [ 27.417102][ T22] ? uevent_store+0x50/0x50 [ 27.421585][ T22] ? create_intf_ep_devs+0x1ba/0x230 [ 27.426849][ T22] usb_set_configuration+0xdf6/0x1670 [ 27.432196][ T22] generic_probe+0x9d/0xd5 [ 27.436583][ T22] usb_probe_device+0x99/0x100 [ 27.441319][ T22] ? usb_suspend+0x620/0x620 [ 27.445880][ T22] really_probe+0x281/0x6d0 [ 27.450357][ T22] driver_probe_device+0x104/0x210 [ 27.455441][ T22] __device_attach_driver+0x1c2/0x220 [ 27.460786][ T22] ? driver_allows_async_probing+0x160/0x160 [ 27.466736][ T22] bus_for_each_drv+0x162/0x1e0 [ 27.471560][ T22] ? bus_rescan_devices+0x20/0x20 [ 27.476567][ T22] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 27.482345][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 27.487601][ T22] __device_attach+0x217/0x360 [ 27.492338][ T22] ? device_bind_driver+0xd0/0xd0 [ 27.497337][ T22] ? kobject_uevent_env+0x29e/0x1160 [ 27.502595][ T22] ? kobject_uevent_env+0x2a8/0x1160 [ 27.507851][ T22] bus_probe_device+0x1e4/0x290 [ 27.512675][ T22] ? blocking_notifier_call_chain+0x54/0xa0 [ 27.518538][ T22] device_add+0xae6/0x16f0 [ 27.522926][ T22] ? uevent_store+0x50/0x50 [ 27.527407][ T22] usb_new_device.cold+0x6a4/0xe79 [ 27.532491][ T22] hub_event+0x1df8/0x3800 [ 27.536879][ T22] ? hub_port_debounce+0x260/0x260 [ 27.541965][ T22] ? find_held_lock+0x2d/0x110 [ 27.546718][ T22] ? mark_held_locks+0xe0/0xe0 [ 27.551469][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 27.557008][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 27.562279][ T22] process_one_work+0x92b/0x1530 [ 27.567200][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 27.572549][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 27.577590][ T22] worker_thread+0x96/0xe20 [ 27.582097][ T22] ? process_one_work+0x1530/0x1530 [ 27.587271][ T22] kthread+0x318/0x420 [ 27.591315][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 27.596681][ T22] ret_from_fork+0x24/0x30 [ 27.601655][ T22] Kernel Offset: disabled [ 27.605962][ T22] Rebooting in 86400 seconds..