[info] Using makefile-style concurrent boot in runlevel 2. [ 14.976398][ C1] random: crng init done [....] 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 '10.128.1.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.917048][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 44.156983][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 44.277075][ T12] usb 1-1: config 0 has an invalid interface number: 70 but max is 0 [ 44.285266][ T12] usb 1-1: config 0 has no interface number 0 [ 44.291563][ T12] usb 1-1: config 0 interface 70 has no altsetting 0 [ 44.298351][ T12] usb 1-1: New USB device found, idVendor=9022, idProduct=d421, bcdDevice= c.dd [ 44.307419][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 44.317026][ T12] usb 1-1: config 0 descriptor?? executing program [ 44.607050][ T12] usb 1-1: string descriptor 0 read error: -71 [ 44.615067][ T12] dw2102: su3000_identify_state [ 44.620278][ T12] dvb-usb: found a 'TeVii S421 PCI' in warm state. [ 44.626948][ T12] dw2102: su3000_power_ctrl: 1, initialized 0 [ 44.633245][ T12] dvb-usb: bulk message failed: -22 (2/256) [ 44.640997][ T12] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 44.667324][ T12] dvbdev: DVB: registering new adapter (TeVii S421 PCI) [ 44.674392][ T12] usb 1-1: media controller created [ 44.679958][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.686672][ T12] dw2102: i2c transfer failed. [ 44.691559][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.698164][ T12] dw2102: i2c transfer failed. [ 44.702913][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.709729][ T12] dw2102: i2c transfer failed. [ 44.714490][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.721098][ T12] dw2102: i2c transfer failed. [ 44.725859][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.732458][ T12] dw2102: i2c transfer failed. [ 44.737242][ T12] dvb-usb: bulk message failed: -22 (6/-2035936856) [ 44.743801][ T12] dw2102: i2c transfer failed. [ 44.748582][ T12] dvb-usb: MAC address: 02:02:02:02:02:02 [ 44.758179][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 44.773695][ T12] dvb-usb: bulk message failed: -22 (1/0) [ 44.779537][ T12] dw2102: command 0x51 transfer failed. [ 44.786530][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.793285][ T12] dw2102: i2c transfer failed. [ 44.798253][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.804838][ T12] dw2102: i2c transfer failed. [ 44.809685][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.816275][ T12] dw2102: i2c transfer failed. [ 44.821089][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.827700][ T12] dw2102: i2c transfer failed. [ 44.832475][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.839086][ T12] dw2102: i2c transfer failed. [ 44.843856][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.850472][ T12] dw2102: i2c transfer failed. [ 44.887024][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.893639][ T12] dw2102: i2c transfer failed. [ 44.898485][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.905126][ T12] dw2102: i2c transfer failed. [ 44.909942][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.916526][ T12] dw2102: i2c transfer failed. [ 44.921358][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.928004][ T12] dw2102: i2c transfer failed. [ 44.932898][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.939515][ T12] dw2102: i2c transfer failed. [ 44.944981][ T12] dvb-usb: bulk message failed: -22 (5/-2035936856) [ 44.951630][ T12] dw2102: i2c transfer failed. [ 44.956414][ T12] ts2020 0-0060: Montage Technology TS2020 successfully identified [ 44.964895][ T12] dw2102: Attached RS2000/TS2020! [ 44.970147][ T12] usb 1-1: DVB: registering adapter 0 frontend 0 (M88RS2000 DVB-S)... [ 44.978592][ T12] dvbdev: dvb_create_media_entity: media entity 'M88RS2000 DVB-S' registered. [ 45.037310][ T12] Registered IR keymap rc-su3000 [ 45.042962][ T12] rc rc0: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0 [ 45.052775][ T12] input: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0/input5 [ 45.063188][ T12] dvb-usb: schedule remote query interval to 150 msecs. [ 45.070223][ T12] dw2102: su3000_power_ctrl: 0, initialized 1 [ 45.076295][ T12] dvb-usb: TeVii S421 PCI successfully initialized and connected. [ 45.085454][ T12] usb 1-1: USB disconnect, device number 2 [ 45.091962][ T12] ================================================================== [ 45.100093][ T12] BUG: KASAN: use-after-free in dvb_usb_device_exit+0x19a/0x1a0 [ 45.107727][ T12] Read of size 8 at addr ffff8881cff2e2e8 by task kworker/0:1/12 [ 45.115415][ T12] [ 45.117725][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc1-syzkaller #0 [ 45.125850][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.135898][ T12] Workqueue: usb_hub_wq hub_event [ 45.140945][ T12] Call Trace: [ 45.144217][ T12] dump_stack+0xef/0x16e [ 45.148457][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.153720][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.158981][ T12] print_address_description.constprop.0+0x16/0x200 [ 45.165546][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.170818][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.176097][ T12] __kasan_report.cold+0x37/0x7f [ 45.181022][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.186303][ T12] kasan_report+0xe/0x20 [ 45.190546][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 45.195659][ T12] ? dvb_usb_exit+0x290/0x290 [ 45.200322][ T12] ? mark_held_locks+0x9f/0xe0 [ 45.205079][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 45.210875][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 45.216145][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 45.221504][ T12] ? __pm_runtime_resume+0x111/0x180 [ 45.226780][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 45.231977][ T12] ? usb_autoresume_device+0x60/0x60 [ 45.237241][ T12] device_release_driver_internal+0x42f/0x500 [ 45.243286][ T12] bus_remove_device+0x2dc/0x4a0 [ 45.248278][ T12] device_del+0x481/0xd30 [ 45.252866][ T12] ? device_create_with_groups+0x120/0x120 [ 45.258771][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 45.264176][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 45.269597][ T12] usb_disable_device+0x211/0x690 [ 45.274605][ T12] usb_disconnect+0x284/0x8d0 [ 45.279263][ T12] hub_event+0x1753/0x3860 [ 45.283673][ T12] ? hub_port_debounce+0x260/0x260 [ 45.288761][ T12] ? find_held_lock+0x2d/0x110 [ 45.293510][ T12] ? mark_held_locks+0xe0/0xe0 [ 45.298257][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 45.303789][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 45.309056][ T12] process_one_work+0x92b/0x1530 [ 45.313970][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 45.319315][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 45.324316][ T12] worker_thread+0x7ab/0xe20 [ 45.328889][ T12] ? process_one_work+0x1530/0x1530 [ 45.334072][ T12] kthread+0x318/0x420 [ 45.338133][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 45.343480][ T12] ret_from_fork+0x24/0x30 [ 45.347880][ T12] [ 45.350194][ T12] Allocated by task 12: [ 45.354337][ T12] save_stack+0x1b/0x80 [ 45.358489][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 45.364099][ T12] __kmalloc_track_caller+0xf0/0x310 [ 45.369362][ T12] kmemdup+0x23/0x50 [ 45.373231][ T12] dw2102_probe+0x627/0xc40 [ 45.377733][ T12] usb_probe_interface+0x305/0x7a0 [ 45.382830][ T12] really_probe+0x281/0x6d0 [ 45.387316][ T12] driver_probe_device+0x104/0x210 [ 45.392414][ T12] __device_attach_driver+0x1c2/0x220 [ 45.397890][ T12] bus_for_each_drv+0x162/0x1e0 [ 45.402723][ T12] __device_attach+0x217/0x360 [ 45.407476][ T12] bus_probe_device+0x1e4/0x290 [ 45.412315][ T12] device_add+0x1480/0x1c20 [ 45.417071][ T12] usb_set_configuration+0xe67/0x1740 [ 45.422441][ T12] generic_probe+0x9d/0xd5 [ 45.426968][ T12] usb_probe_device+0x99/0x100 [ 45.431710][ T12] really_probe+0x281/0x6d0 [ 45.436202][ T12] driver_probe_device+0x104/0x210 [ 45.441311][ T12] __device_attach_driver+0x1c2/0x220 [ 45.446662][ T12] bus_for_each_drv+0x162/0x1e0 [ 45.451499][ T12] __device_attach+0x217/0x360 [ 45.456242][ T12] bus_probe_device+0x1e4/0x290 [ 45.461082][ T12] device_add+0x1480/0x1c20 [ 45.465562][ T12] usb_new_device.cold+0x6a4/0xe79 [ 45.470739][ T12] hub_event+0x1e59/0x3860 [ 45.475140][ T12] process_one_work+0x92b/0x1530 [ 45.480067][ T12] worker_thread+0x96/0xe20 [ 45.484555][ T12] kthread+0x318/0x420 [ 45.488620][ T12] ret_from_fork+0x24/0x30 [ 45.493011][ T12] [ 45.495333][ T12] Freed by task 12: [ 45.499132][ T12] save_stack+0x1b/0x80 [ 45.503265][ T12] __kasan_slab_free+0x129/0x170 [ 45.508193][ T12] kfree+0xda/0x310 [ 45.511980][ T12] dw2102_probe+0x871/0xc40 [ 45.516463][ T12] usb_probe_interface+0x305/0x7a0 [ 45.521644][ T12] really_probe+0x281/0x6d0 [ 45.526124][ T12] driver_probe_device+0x104/0x210 [ 45.531212][ T12] __device_attach_driver+0x1c2/0x220 [ 45.536748][ T12] bus_for_each_drv+0x162/0x1e0 [ 45.541585][ T12] __device_attach+0x217/0x360 [ 45.546338][ T12] bus_probe_device+0x1e4/0x290 [ 45.551167][ T12] device_add+0x1480/0x1c20 [ 45.555659][ T12] usb_set_configuration+0xe67/0x1740 [ 45.561009][ T12] generic_probe+0x9d/0xd5 [ 45.565405][ T12] usb_probe_device+0x99/0x100 [ 45.570168][ T12] really_probe+0x281/0x6d0 [ 45.574650][ T12] driver_probe_device+0x104/0x210 [ 45.579747][ T12] __device_attach_driver+0x1c2/0x220 [ 45.585107][ T12] bus_for_each_drv+0x162/0x1e0 [ 45.589953][ T12] __device_attach+0x217/0x360 [ 45.594890][ T12] bus_probe_device+0x1e4/0x290 [ 45.599722][ T12] device_add+0x1480/0x1c20 [ 45.604204][ T12] usb_new_device.cold+0x6a4/0xe79 [ 45.609293][ T12] hub_event+0x1e59/0x3860 [ 45.613692][ T12] process_one_work+0x92b/0x1530 [ 45.618611][ T12] worker_thread+0x96/0xe20 [ 45.623110][ T12] kthread+0x318/0x420 [ 45.627156][ T12] ret_from_fork+0x24/0x30 [ 45.631542][ T12] [ 45.633849][ T12] The buggy address belongs to the object at ffff8881cff2e000 [ 45.633849][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 45.647889][ T12] The buggy address is located 744 bytes inside of [ 45.647889][ T12] 4096-byte region [ffff8881cff2e000, ffff8881cff2f000) [ 45.661233][ T12] The buggy address belongs to the page: [ 45.666853][ T12] page:ffffea00073fca00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 45.677779][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 45.686349][ T12] raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 [ 45.695061][ T12] page dumped because: kasan: bad access detected [ 45.701468][ T12] [ 45.703783][ T12] Memory state around the buggy address: [ 45.709402][ T12] ffff8881cff2e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.717509][ T12] ffff8881cff2e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.725738][ T12] >ffff8881cff2e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.733785][ T12] ^ [ 45.742103][ T12] ffff8881cff2e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.750161][ T12] ffff8881cff2e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.758257][ T12] ================================================================== [ 45.766313][ T12] Disabling lock debugging due to kernel taint [ 45.772525][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 45.779269][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.5.0-rc1-syzkaller #0 [ 45.788878][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.798929][ T12] Workqueue: usb_hub_wq hub_event [ 45.803934][ T12] Call Trace: [ 45.807357][ T12] dump_stack+0xef/0x16e [ 45.811786][ T12] panic+0x2aa/0x6e1 [ 45.815684][ T12] ? add_taint.cold+0x16/0x16 [ 45.820358][ T12] ? retint_kernel+0x10/0x10 [ 45.824942][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 45.829944][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.835210][ T12] end_report+0x43/0x49 [ 45.839350][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.844614][ T12] __kasan_report.cold+0x55/0x7f [ 45.849546][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 45.854808][ T12] kasan_report+0xe/0x20 [ 45.859026][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 45.864114][ T12] ? dvb_usb_exit+0x290/0x290 [ 45.868779][ T12] ? mark_held_locks+0x9f/0xe0 [ 45.873702][ T12] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 45.879493][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 45.884765][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 45.890230][ T12] ? __pm_runtime_resume+0x111/0x180 [ 45.895501][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 45.900776][ T12] ? usb_autoresume_device+0x60/0x60 [ 45.906125][ T12] device_release_driver_internal+0x42f/0x500 [ 45.912183][ T12] bus_remove_device+0x2dc/0x4a0 [ 45.917094][ T12] device_del+0x481/0xd30 [ 45.921491][ T12] ? device_create_with_groups+0x120/0x120 [ 45.927361][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 45.932624][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 45.937929][ T12] usb_disable_device+0x211/0x690 [ 45.942935][ T12] usb_disconnect+0x284/0x8d0 [ 45.947589][ T12] hub_event+0x1753/0x3860 [ 45.951985][ T12] ? hub_port_debounce+0x260/0x260 [ 45.957073][ T12] ? find_held_lock+0x2d/0x110 [ 45.961811][ T12] ? mark_held_locks+0xe0/0xe0 [ 45.966754][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 45.972294][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 45.977575][ T12] process_one_work+0x92b/0x1530 [ 45.982499][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 45.987876][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 45.992881][ T12] worker_thread+0x7ab/0xe20 [ 45.997552][ T12] ? process_one_work+0x1530/0x1530 [ 46.002731][ T12] kthread+0x318/0x420 [ 46.006797][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 46.012184][ T12] ret_from_fork+0x24/0x30 [ 46.017484][ T12] Kernel Offset: disabled [ 46.021807][ T12] Rebooting in 86400 seconds..