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 '10.128.10.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.538123][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 26.777664][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 26.897739][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0xB has wMaxPacketSize 0, skipping [ 27.067713][ T12] usb 1-1: New USB device found, idVendor=08ca, idProduct=0023, bcdDevice=ae.1c [ 27.076781][ T12] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 27.084817][ T12] usb 1-1: Product: syz [ 27.089041][ T12] usb 1-1: Manufacturer: syz [ 27.093613][ T12] usb 1-1: SerialNumber: syz [ 27.099849][ T12] usb 1-1: config 0 descriptor?? [ 27.357716][ T12] aiptek 1-1:0.0: Aiptek using 400 ms programming speed [ 27.365759][ T12] input: Aiptek as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/input/input5 [ 27.447652][ T12] input: failed to attach handler kbd to device input5, error: -5 [ 27.457765][ T12] usb 1-1: USB disconnect, device number 2 [ 27.907674][ T12] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 28.147629][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 28.267674][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0xB has wMaxPacketSize 0, skipping [ 28.437709][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=d853, bcdDevice=8f.f3 [ 28.446841][ T12] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 28.454851][ T12] usb 1-1: Product: syz [ 28.459026][ T12] usb 1-1: Manufacturer: syz [ 28.463594][ T12] usb 1-1: SerialNumber: syz [ 28.469104][ T12] usb 1-1: config 0 descriptor?? [ 28.508973][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge Mercury' in warm state [ 28.517354][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 28.528018][ T12] dvbdev: DVB: registering new adapter (Hauppauge Mercury) [ 28.535286][ T12] usb 1-1: media controller created [ 28.544403][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 28.557764][ T12] usb 1-1: selecting invalid altsetting 1 [ 28.563484][ T12] set interface failed [ 28.563488][ T12] ------------[ cut here ]------------ [ 28.572993][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 28.573034][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:941 __mutex_lock+0xd2c/0x1360 [ 28.587989][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 28.594570][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 28.602691][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.612727][ T12] Workqueue: usb_hub_wq hub_event [ 28.617729][ T12] Call Trace: [ 28.621011][ T12] dump_stack+0xef/0x16e [ 28.625244][ T12] ? __mutex_lock+0xcc0/0x1360 [ 28.629981][ T12] panic+0x2aa/0x6e1 [ 28.633850][ T12] ? add_taint.cold+0x16/0x16 [ 28.638516][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 28.643772][ T12] ? __warn.cold+0x14/0x30 [ 28.648167][ T12] ? __warn+0xd5/0x1c8 [ 28.652211][ T12] ? __mutex_lock+0xd2c/0x1360 [ 28.656947][ T12] __warn.cold+0x2f/0x30 [ 28.661183][ T12] ? __mutex_lock+0xd2c/0x1360 [ 28.665919][ T12] report_bug+0x27b/0x2f0 [ 28.670264][ T12] do_error_trap+0x12b/0x1e0 [ 28.674834][ T12] ? __mutex_lock+0xd2c/0x1360 [ 28.679575][ T12] do_invalid_op+0x32/0x40 [ 28.684009][ T12] ? __mutex_lock+0xd2c/0x1360 [ 28.688751][ T12] invalid_op+0x23/0x30 [ 28.692928][ T12] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 28.698292][ T12] Code: d2 0f 85 f1 05 00 00 44 8b 05 a0 44 2d 02 45 85 c0 0f 85 0f f4 ff ff 48 c7 c6 a0 7e c6 85 48 c7 c7 a0 7c c6 85 e8 fc 82 99 fb <0f> 0b e9 f5 f3 ff ff 65 48 8b 1c 25 00 0f 02 00 be 08 00 00 00 48 [ 28.717870][ T12] RSP: 0018:ffff8881da226ee0 EFLAGS: 00010286 [ 28.723922][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 28.731871][ T12] RDX: 0000000000000000 RSI: ffffffff81295dad RDI: ffffed103b444dce [ 28.739818][ T12] RBP: ffff8881da227050 R08: ffff8881da211880 R09: fffffbfff0ddeafd [ 28.747854][ T12] R10: fffffbfff0ddeafc R11: ffffffff86ef57e3 R12: 0000000000000000 [ 28.755801][ T12] R13: dffffc0000000000 R14: ffff8881cf9519c8 R15: ffff8881cf9519c8 [ 28.763754][ T12] ? vprintk_func+0x7d/0x113 [ 28.768345][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 28.773343][ T12] ? find_held_lock+0x2d/0x110 [ 28.778079][ T12] ? vprintk_emit+0xe2/0x3d0 [ 28.782644][ T12] ? mutex_trylock+0x2e0/0x2e0 [ 28.787396][ T12] ? mark_lock+0xbc/0x1160 [ 28.791787][ T12] ? mark_held_locks+0x9f/0xe0 [ 28.796540][ T12] ? vprintk_emit+0x112/0x3d0 [ 28.801189][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 28.806449][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 28.811461][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 28.816285][ T12] mxl111sf_write_reg+0x8b/0x120 [ 28.821208][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 28.827859][ T12] ? usb_set_interface+0x79c/0xa50 [ 28.832980][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 28.837994][ T12] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 28.845335][ T12] mxl111sf_frontend_attach_mercury+0x13/0x70 [ 28.851374][ T12] ? mxl111sf_lg2161_ep6_frontend_attach+0x960/0x960 [ 28.858040][ T12] dvb_usbv2_probe.cold+0x1e78/0x25d7 [ 28.863388][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 28.868615][ T12] ? rpm_callback+0x230/0x230 [ 28.873323][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 28.878593][ T12] ? __pm_runtime_resume+0x111/0x180 [ 28.883861][ T12] usb_probe_interface+0x305/0x7a0 [ 28.888987][ T12] ? usb_probe_device+0x100/0x100 [ 28.893993][ T12] really_probe+0x281/0x6d0 [ 28.898476][ T12] driver_probe_device+0x104/0x210 [ 28.903562][ T12] __device_attach_driver+0x1c2/0x220 [ 28.908946][ T12] ? driver_allows_async_probing+0x160/0x160 [ 28.914898][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.919724][ T12] ? bus_rescan_devices+0x20/0x20 [ 28.924723][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 28.930511][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 28.935769][ T12] __device_attach+0x217/0x360 [ 28.940507][ T12] ? device_bind_driver+0xd0/0xd0 [ 28.945508][ T12] bus_probe_device+0x1e4/0x290 [ 28.950339][ T12] device_add+0x1480/0x1c20 [ 28.954824][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 28.960096][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 28.966136][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 28.971941][ T12] usb_set_configuration+0xe67/0x1740 [ 28.977287][ T12] generic_probe+0x9d/0xd5 [ 28.981682][ T12] usb_probe_device+0x99/0x100 [ 28.986424][ T12] ? usb_suspend+0x620/0x620 [ 28.991086][ T12] really_probe+0x281/0x6d0 [ 28.995561][ T12] driver_probe_device+0x104/0x210 [ 29.000649][ T12] __device_attach_driver+0x1c2/0x220 [ 29.005995][ T12] ? driver_allows_async_probing+0x160/0x160 [ 29.011948][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.016772][ T12] ? bus_rescan_devices+0x20/0x20 [ 29.021782][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 29.027568][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 29.032839][ T12] __device_attach+0x217/0x360 [ 29.037577][ T12] ? device_bind_driver+0xd0/0xd0 [ 29.042573][ T12] bus_probe_device+0x1e4/0x290 [ 29.047408][ T12] device_add+0x1480/0x1c20 [ 29.051884][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 29.057923][ T12] usb_new_device.cold+0x6a4/0xe79 [ 29.063013][ T12] hub_event+0x1e59/0x3860 [ 29.067405][ T12] ? hub_port_debounce+0x260/0x260 [ 29.072490][ T12] ? find_held_lock+0x2d/0x110 [ 29.077238][ T12] ? mark_held_locks+0xe0/0xe0 [ 29.081988][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 29.087508][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 29.092766][ T12] process_one_work+0x92b/0x1530 [ 29.097676][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 29.103018][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 29.108016][ T12] worker_thread+0x7ab/0xe20 [ 29.112589][ T12] ? process_one_work+0x1530/0x1530 [ 29.117773][ T12] kthread+0x318/0x420 [ 29.121815][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 29.127165][ T12] ret_from_fork+0x24/0x30 [ 29.132174][ T12] Kernel Offset: disabled [ 29.136497][ T12] Rebooting in 86400 seconds..