[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[ 14.969930][ C1] random: crng init done [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.879771][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 40.119734][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 40.239854][ T12] usb 1-1: config 0 has an invalid interface number: 45 but max is 0 [ 40.248079][ T12] usb 1-1: config 0 has an invalid interface descriptor of length 2, skipping [ 40.257106][ T12] usb 1-1: config 0 has no interface number 0 [ 40.263235][ T12] usb 1-1: config 0 interface 45 altsetting 0 has an invalid endpoint with address 0x0, skipping [ 40.273776][ T12] usb 1-1: New USB device found, idVendor=9022, idProduct=d421, bcdDevice=d1.5c [ 40.282822][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.292495][ T12] usb 1-1: config 0 descriptor?? [ 40.331691][ T12] dw2102: su3000_identify_state [ 40.336648][ T12] dvb-usb: found a 'TeVii S421 PCI' in warm state. [ 40.343274][ T12] dw2102: su3000_power_ctrl: 1, initialized 0 [ 40.349592][ T12] dvb-usb: bulk message failed: -22 (2/-635461568) [ 40.357612][ T12] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 40.380102][ T12] dvbdev: DVB: registering new adapter (TeVii S421 PCI) [ 40.387197][ T12] usb 1-1: media controller created [ 40.392729][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.399400][ T12] dw2102: i2c transfer failed. [ 40.404279][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.410881][ T12] dw2102: i2c transfer failed. [ 40.415633][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.422252][ T12] dw2102: i2c transfer failed. [ 40.427021][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.433629][ T12] dw2102: i2c transfer failed. [ 40.438402][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.445010][ T12] dw2102: i2c transfer failed. [ 40.449812][ T12] dvb-usb: bulk message failed: -22 (6/-2035969728) [ 40.456441][ T12] dw2102: i2c transfer failed. [ 40.461228][ T12] dvb-usb: MAC address: 02:02:02:02:02:02 [ 40.470836][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. executing program [ 40.485882][ T12] dvb-usb: bulk message failed: -22 (1/0) [ 40.491675][ T12] dw2102: command 0x51 transfer failed. [ 40.498526][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.505240][ T12] dw2102: i2c transfer failed. [ 40.510114][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.516677][ T12] dw2102: i2c transfer failed. [ 40.521485][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.528068][ T12] dw2102: i2c transfer failed. [ 40.532898][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.539608][ T12] dw2102: i2c transfer failed. [ 40.544411][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.551002][ T12] dw2102: i2c transfer failed. [ 40.555746][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.562343][ T12] dw2102: i2c transfer failed. [ 40.599796][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.606387][ T12] dw2102: i2c transfer failed. [ 40.611207][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.617778][ T12] dw2102: i2c transfer failed. [ 40.622573][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.629160][ T12] dw2102: i2c transfer failed. [ 40.633961][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.640556][ T12] dw2102: i2c transfer failed. [ 40.645331][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.651930][ T12] dw2102: i2c transfer failed. [ 40.656687][ T12] dvb-usb: bulk message failed: -22 (5/-2035969728) [ 40.663294][ T12] dw2102: i2c transfer failed. [ 40.668072][ T12] ts2020 0-0060: Montage Technology TS2020 successfully identified [ 40.676602][ T12] dw2102: Attached RS2000/TS2020! [ 40.681838][ T12] usb 1-1: DVB: registering adapter 0 frontend 0 (M88RS2000 DVB-S)... [ 40.690274][ T12] dvbdev: dvb_create_media_entity: media entity 'M88RS2000 DVB-S' registered. [ 40.750014][ T12] Registered IR keymap rc-su3000 [ 40.755465][ T12] rc rc0: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0 [ 40.764769][ T12] input: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0/input5 [ 40.775114][ T12] dvb-usb: schedule remote query interval to 150 msecs. [ 40.782113][ T12] dw2102: su3000_power_ctrl: 0, initialized 1 [ 40.788172][ T12] dvb-usb: TeVii S421 PCI successfully initialized and connected. [ 40.797238][ T12] usb 1-1: USB disconnect, device number 2 [ 40.803615][ T12] ================================================================== [ 40.811718][ T12] BUG: KASAN: use-after-free in dvb_usb_device_exit+0x19a/0x1a0 [ 40.819424][ T12] Read of size 8 at addr ffff8881d20b82e8 by task kworker/0:1/12 [ 40.827130][ T12] [ 40.829441][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 40.836789][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.846877][ T12] Workqueue: usb_hub_wq hub_event [ 40.851875][ T12] Call Trace: [ 40.855148][ T12] dump_stack+0xca/0x13e [ 40.859387][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 40.864650][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 40.869915][ T12] print_address_description+0x6a/0x32c [ 40.875589][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 40.880852][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 40.886167][ T12] __kasan_report.cold+0x1a/0x33 [ 40.891090][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 40.896352][ T12] kasan_report+0xe/0x12 [ 40.900619][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 40.905708][ T12] ? dvb_usb_exit+0x290/0x290 [ 40.910362][ T12] ? mark_held_locks+0x9f/0xe0 [ 40.915135][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 40.920917][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 40.926186][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 40.931556][ T12] ? __pm_runtime_resume+0x111/0x180 [ 40.936830][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 40.942007][ T12] ? usb_autoresume_device+0x60/0x60 [ 40.947282][ T12] device_release_driver_internal+0x42f/0x500 [ 40.953325][ T12] bus_remove_device+0x2dc/0x4a0 [ 40.958250][ T12] device_del+0x420/0xb10 [ 40.962560][ T12] ? __device_links_no_driver+0x240/0x240 [ 40.968268][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 40.973531][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 40.978799][ T12] usb_disable_device+0x211/0x690 [ 40.983799][ T12] usb_disconnect+0x284/0x8d0 [ 40.988451][ T12] hub_event+0x1454/0x3640 [ 40.992845][ T12] ? find_held_lock+0x2d/0x110 [ 40.997585][ T12] ? mark_held_locks+0xe0/0xe0 [ 41.002325][ T12] ? hub_port_debounce+0x260/0x260 [ 41.007417][ T12] process_one_work+0x92b/0x1530 [ 41.012335][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 41.017680][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 41.022703][ T12] worker_thread+0x7ab/0xe20 [ 41.027272][ T12] ? process_one_work+0x1530/0x1530 [ 41.032448][ T12] kthread+0x318/0x420 [ 41.036502][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 41.041860][ T12] ret_from_fork+0x24/0x30 [ 41.046249][ T12] [ 41.048568][ T12] Allocated by task 12: [ 41.052700][ T12] save_stack+0x1b/0x80 [ 41.056832][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 41.062439][ T12] __kmalloc_track_caller+0xfd/0x330 [ 41.067698][ T12] kmemdup+0x23/0x50 [ 41.071589][ T12] dw2102_probe+0x627/0xc40 [ 41.076078][ T12] usb_probe_interface+0x305/0x7a0 [ 41.081180][ T12] really_probe+0x281/0x6d0 [ 41.085675][ T12] driver_probe_device+0x101/0x1b0 [ 41.090759][ T12] __device_attach_driver+0x1c2/0x220 [ 41.096118][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.100943][ T12] __device_attach+0x217/0x360 [ 41.105684][ T12] bus_probe_device+0x1e4/0x290 [ 41.110508][ T12] device_add+0xae6/0x16f0 [ 41.114901][ T12] usb_set_configuration+0xdf6/0x1670 [ 41.120248][ T12] generic_probe+0x9d/0xd5 [ 41.124640][ T12] usb_probe_device+0x99/0x100 [ 41.129378][ T12] really_probe+0x281/0x6d0 [ 41.133855][ T12] driver_probe_device+0x101/0x1b0 [ 41.138960][ T12] __device_attach_driver+0x1c2/0x220 [ 41.144307][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.149150][ T12] __device_attach+0x217/0x360 [ 41.153897][ T12] bus_probe_device+0x1e4/0x290 [ 41.158721][ T12] device_add+0xae6/0x16f0 [ 41.163116][ T12] usb_new_device.cold+0x6a4/0xe79 [ 41.168202][ T12] hub_event+0x1b5c/0x3640 [ 41.172607][ T12] process_one_work+0x92b/0x1530 [ 41.177521][ T12] worker_thread+0x96/0xe20 [ 41.182004][ T12] kthread+0x318/0x420 [ 41.186051][ T12] ret_from_fork+0x24/0x30 [ 41.190437][ T12] [ 41.192743][ T12] Freed by task 12: [ 41.196542][ T12] save_stack+0x1b/0x80 [ 41.200676][ T12] __kasan_slab_free+0x130/0x180 [ 41.205589][ T12] kfree+0xe4/0x2f0 [ 41.209375][ T12] dw2102_probe+0x871/0xc40 [ 41.213854][ T12] usb_probe_interface+0x305/0x7a0 [ 41.218943][ T12] really_probe+0x281/0x6d0 [ 41.223422][ T12] driver_probe_device+0x101/0x1b0 [ 41.228506][ T12] __device_attach_driver+0x1c2/0x220 [ 41.233851][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.238693][ T12] __device_attach+0x217/0x360 [ 41.243433][ T12] bus_probe_device+0x1e4/0x290 [ 41.248258][ T12] device_add+0xae6/0x16f0 [ 41.252650][ T12] usb_set_configuration+0xdf6/0x1670 [ 41.257997][ T12] generic_probe+0x9d/0xd5 [ 41.262389][ T12] usb_probe_device+0x99/0x100 [ 41.267166][ T12] really_probe+0x281/0x6d0 [ 41.271643][ T12] driver_probe_device+0x101/0x1b0 [ 41.276745][ T12] __device_attach_driver+0x1c2/0x220 [ 41.282101][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.286944][ T12] __device_attach+0x217/0x360 [ 41.291685][ T12] bus_probe_device+0x1e4/0x290 [ 41.296511][ T12] device_add+0xae6/0x16f0 [ 41.300903][ T12] usb_new_device.cold+0x6a4/0xe79 [ 41.305996][ T12] hub_event+0x1b5c/0x3640 [ 41.310389][ T12] process_one_work+0x92b/0x1530 [ 41.315303][ T12] worker_thread+0x96/0xe20 [ 41.319779][ T12] kthread+0x318/0x420 [ 41.323826][ T12] ret_from_fork+0x24/0x30 [ 41.328212][ T12] [ 41.330520][ T12] The buggy address belongs to the object at ffff8881d20b8000 [ 41.330520][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 41.344563][ T12] The buggy address is located 744 bytes inside of [ 41.344563][ T12] 4096-byte region [ffff8881d20b8000, ffff8881d20b9000) [ 41.357889][ T12] The buggy address belongs to the page: [ 41.363498][ T12] page:ffffea0007482e00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 41.374401][ T12] flags: 0x200000000010200(slab|head) [ 41.379753][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 41.388313][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 41.396867][ T12] page dumped because: kasan: bad access detected [ 41.403250][ T12] [ 41.405556][ T12] Memory state around the buggy address: [ 41.411185][ T12] ffff8881d20b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.419221][ T12] ffff8881d20b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.427258][ T12] >ffff8881d20b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.435292][ T12] ^ [ 41.442719][ T12] ffff8881d20b8300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.450753][ T12] ffff8881d20b8380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.458783][ T12] ================================================================== [ 41.466817][ T12] Disabling lock debugging due to kernel taint [ 41.473003][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 41.479578][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0-rc7+ #0 [ 41.488306][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.498342][ T12] Workqueue: usb_hub_wq hub_event [ 41.503338][ T12] Call Trace: [ 41.506605][ T12] dump_stack+0xca/0x13e [ 41.510821][ T12] panic+0x2a3/0x6da [ 41.514689][ T12] ? add_taint.cold+0x16/0x16 [ 41.519340][ T12] ? retint_kernel+0x10/0x10 [ 41.523906][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 41.528906][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.534164][ T12] end_report+0x43/0x49 [ 41.538292][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.543551][ T12] __kasan_report.cold+0xd/0x33 [ 41.548379][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.553637][ T12] kasan_report+0xe/0x12 [ 41.557863][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 41.562948][ T12] ? dvb_usb_exit+0x290/0x290 [ 41.567612][ T12] ? mark_held_locks+0x9f/0xe0 [ 41.572351][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 41.578147][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 41.583407][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 41.588755][ T12] ? __pm_runtime_resume+0x111/0x180 [ 41.594012][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 41.599187][ T12] ? usb_autoresume_device+0x60/0x60 [ 41.604462][ T12] device_release_driver_internal+0x42f/0x500 [ 41.610502][ T12] bus_remove_device+0x2dc/0x4a0 [ 41.615419][ T12] device_del+0x420/0xb10 [ 41.619754][ T12] ? __device_links_no_driver+0x240/0x240 [ 41.625543][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 41.630818][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 41.636079][ T12] usb_disable_device+0x211/0x690 [ 41.641086][ T12] usb_disconnect+0x284/0x8d0 [ 41.645743][ T12] hub_event+0x1454/0x3640 [ 41.650141][ T12] ? find_held_lock+0x2d/0x110 [ 41.654880][ T12] ? mark_held_locks+0xe0/0xe0 [ 41.659616][ T12] ? hub_port_debounce+0x260/0x260 [ 41.664788][ T12] process_one_work+0x92b/0x1530 [ 41.669702][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 41.675136][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 41.680136][ T12] worker_thread+0x7ab/0xe20 [ 41.684699][ T12] ? process_one_work+0x1530/0x1530 [ 41.689870][ T12] kthread+0x318/0x420 [ 41.693913][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 41.699259][ T12] ret_from_fork+0x24/0x30 [ 41.704502][ T12] Kernel Offset: disabled [ 41.708812][ T12] Rebooting in 86400 seconds..