[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 14.161767][ C1] random: crng init done [....] 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 '10.128.0.183' (ECDSA) to the list of known hosts. syzkaller login: [ 26.233214][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 26.473149][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 26.633345][ T12] usb 1-1: unable to get BOS descriptor or descriptor too short [ 26.713242][ T12] usb 1-1: config 4 has an invalid interface association descriptor of length 2, skipping [ 26.723300][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0xD has invalid maxpacket 405, setting to 64 [ 26.734080][ T12] usb 1-1: config 4 interface 0 altsetting 64 has an invalid endpoint with address 0x0, skipping [ 26.744597][ T12] usb 1-1: config 4 interface 0 altsetting 64 has an invalid endpoint with address 0x80, skipping [ 26.755204][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0x1 has invalid maxpacket 155, setting to 64 [ 26.765981][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0x81 has invalid maxpacket 652, setting to 64 [ 26.776853][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0x9 has an invalid bInterval 0, changing to 7 [ 26.787742][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0xE has invalid maxpacket 646, setting to 64 [ 26.798516][ T12] usb 1-1: config 4 interface 0 altsetting 64 has a duplicate endpoint with address 0xE, skipping [ 26.809126][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0x7 has invalid maxpacket 825, setting to 64 [ 26.819918][ T12] usb 1-1: config 4 interface 0 altsetting 64 endpoint 0x3 has invalid maxpacket 859, setting to 64 [ 26.830735][ T12] usb 1-1: config 4 interface 0 altsetting 64 has a duplicate endpoint with address 0x3, skipping [ 26.841332][ T12] usb 1-1: config 4 interface 0 has no altsetting 0 [ 27.083225][ T12] usb 1-1: string descriptor 0 read error: -22 [ 27.089521][ T12] usb 1-1: New USB device found, idVendor=2040, idProduct=c600, bcdDevice=8e.db [ 27.098584][ T12] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 27.123407][ T1711] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 27.145172][ T12] usb 1-1: dvb_usb_v2: found a 'Hauppauge 126xxx ATSC+' in warm state [ 27.156007][ T12] usb 1-1: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer [ 27.166794][ T12] dvbdev: DVB: registering new adapter (Hauppauge 126xxx ATSC+) [ 27.174526][ T12] usb 1-1: media controller created [ 27.183624][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 27.198386][ T12] usb 1-1: selecting invalid altsetting 1 [ 27.204153][ T12] set interface failed [ 27.204159][ T12] ------------[ cut here ]------------ [ 27.213662][ T12] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 27.213707][ T12] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:941 __mutex_lock+0xd2c/0x1360 [ 27.228656][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 27.235219][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-syzkaller #0 [ 27.243078][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.253112][ T12] Workqueue: usb_hub_wq hub_event [ 27.258191][ T12] Call Trace: [ 27.261466][ T12] dump_stack+0xef/0x16e [ 27.265699][ T12] ? __mutex_lock+0xc70/0x1360 [ 27.270433][ T12] panic+0x2aa/0x6e1 [ 27.274298][ T12] ? add_taint.cold+0x16/0x16 [ 27.278949][ T12] ? __probe_kernel_read+0x188/0x1d0 [ 27.284224][ T12] ? __warn.cold+0x14/0x30 [ 27.288610][ T12] ? __warn+0xd5/0x1c8 [ 27.292649][ T12] ? __mutex_lock+0xd2c/0x1360 [ 27.297384][ T12] __warn.cold+0x2f/0x30 [ 27.301598][ T12] ? __mutex_lock+0xd2c/0x1360 [ 27.306361][ T12] report_bug+0x27b/0x2f0 [ 27.310684][ T12] do_error_trap+0x12b/0x1e0 [ 27.315253][ T12] ? __mutex_lock+0xd2c/0x1360 [ 27.320010][ T12] do_invalid_op+0x32/0x40 [ 27.324450][ T12] ? __mutex_lock+0xd2c/0x1360 [ 27.329189][ T12] invalid_op+0x23/0x30 [ 27.333320][ T12] RIP: 0010:__mutex_lock+0xd2c/0x1360 [ 27.338665][ T12] Code: d2 0f 85 f1 05 00 00 44 8b 05 d0 1d 10 02 45 85 c0 0f 85 0f f4 ff ff 48 c7 c6 00 7d c6 85 48 c7 c7 00 7b c6 85 e8 cc 7c 9c fb <0f> 0b e9 f5 f3 ff ff 65 48 8b 1c 25 00 0f 02 00 be 08 00 00 00 48 [ 27.358293][ T12] RSP: 0018:ffff8881da626ee0 EFLAGS: 00010286 [ 27.364409][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 27.372355][ T12] RDX: 0000000000000000 RSI: ffffffff8128ebcd RDI: ffffed103b4c4dce [ 27.380301][ T12] RBP: ffff8881da627050 R08: ffff8881da611880 R09: fffffbfff0d9e911 [ 27.388246][ T12] R10: fffffbfff0d9e910 R11: ffffffff86cf4883 R12: 0000000000000000 [ 27.396189][ T12] R13: dffffc0000000000 R14: ffff8881cf8141c8 R15: ffff8881cf8141c8 [ 27.404146][ T12] ? vprintk_func+0x7d/0x113 [ 27.408710][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 27.413708][ T12] ? find_held_lock+0x2d/0x110 [ 27.418442][ T12] ? vprintk_emit+0xe2/0x3d0 [ 27.423004][ T12] ? mutex_trylock+0x2e0/0x2e0 [ 27.427752][ T12] ? mark_lock+0xbc/0x1160 [ 27.432138][ T12] ? mark_held_locks+0x9f/0xe0 [ 27.436882][ T12] ? vprintk_emit+0x112/0x3d0 [ 27.441529][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.446796][ T12] ? mxl111sf_ctrl_msg+0xb8/0x210 [ 27.451791][ T12] mxl111sf_ctrl_msg+0xb8/0x210 [ 27.456628][ T12] mxl111sf_write_reg+0x8b/0x120 [ 27.461538][ T12] ? mxl111sf_frontend_attach_mercury_mh+0x940/0x940 [ 27.468182][ T12] ? usb_set_interface+0x79c/0xa50 [ 27.473261][ T12] mxl1x1sf_soft_reset+0x6b/0x190 [ 27.478256][ T12] mxl111sf_lgdt3305_frontend_attach.constprop.0+0x23e/0x790 [ 27.485595][ T12] mxl111sf_frontend_attach_atsc_mh+0x13/0x70 [ 27.491640][ T12] ? mxl111sf_lg2160_frontend_attach+0x900/0x900 [ 27.497938][ T12] dvb_usbv2_probe.cold+0x1e78/0x25d7 [ 27.503281][ T12] ? dvb_usb_start_feed+0xb60/0xb60 [ 27.508449][ T12] ? rpm_callback+0x230/0x230 [ 27.513100][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.518355][ T12] ? __pm_runtime_resume+0x111/0x180 [ 27.523610][ T12] usb_probe_interface+0x305/0x7a0 [ 27.528692][ T12] ? usb_probe_device+0x100/0x100 [ 27.533685][ T12] really_probe+0x281/0x6d0 [ 27.538176][ T12] driver_probe_device+0x104/0x210 [ 27.543258][ T12] __device_attach_driver+0x1c2/0x220 [ 27.548600][ T12] ? driver_allows_async_probing+0x160/0x160 [ 27.554550][ T12] bus_for_each_drv+0x162/0x1e0 [ 27.559374][ T12] ? bus_rescan_devices+0x20/0x20 [ 27.564373][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 27.570164][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.575470][ T12] __device_attach+0x217/0x360 [ 27.580210][ T12] ? device_bind_driver+0xd0/0xd0 [ 27.585216][ T12] bus_probe_device+0x1e4/0x290 [ 27.590052][ T12] device_add+0x1480/0x1c20 [ 27.594532][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 27.599806][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 27.605860][ T12] usb_set_configuration+0xe67/0x1740 [ 27.611222][ T12] generic_probe+0x9d/0xd5 [ 27.615617][ T12] usb_probe_device+0x99/0x100 [ 27.620414][ T12] ? usb_suspend+0x620/0x620 [ 27.624992][ T12] really_probe+0x281/0x6d0 [ 27.629487][ T12] driver_probe_device+0x104/0x210 [ 27.634586][ T12] __device_attach_driver+0x1c2/0x220 [ 27.639947][ T12] ? driver_allows_async_probing+0x160/0x160 [ 27.645914][ T12] bus_for_each_drv+0x162/0x1e0 [ 27.650744][ T12] ? bus_rescan_devices+0x20/0x20 [ 27.655753][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 27.661541][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.666839][ T12] __device_attach+0x217/0x360 [ 27.671658][ T12] ? device_bind_driver+0xd0/0xd0 [ 27.676664][ T12] bus_probe_device+0x1e4/0x290 [ 27.681498][ T12] device_add+0x1480/0x1c20 [ 27.686020][ T12] ? device_links_flush_sync_list+0x350/0x350 [ 27.692067][ T12] usb_new_device.cold+0x6a4/0xe79 [ 27.697161][ T12] hub_event+0x1e59/0x3860 [ 27.701600][ T12] ? hub_port_debounce+0x260/0x260 [ 27.706694][ T12] ? find_held_lock+0x2d/0x110 [ 27.711448][ T12] ? mark_held_locks+0xe0/0xe0 [ 27.716198][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 27.721718][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 27.726980][ T12] process_one_work+0x92b/0x1530 [ 27.731893][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 27.737236][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 27.742232][ T12] worker_thread+0x96/0xe20 [ 27.746706][ T12] ? process_one_work+0x1530/0x1530 [ 27.751874][ T12] kthread+0x318/0x420 [ 27.755941][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 27.761285][ T12] ret_from_fork+0x24/0x30 [ 27.766392][ T12] Kernel Offset: disabled [ 27.770703][ T12] Rebooting in 86400 seconds..