[info] Using makefile-style concurrent boot in runlevel 2. [ 14.352224][ 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 '10.128.0.120' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.777819][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 40.017814][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 40.137897][ T12] usb 1-1: config 0 has an invalid interface number: 171 but max is 0 [ 40.146171][ T12] usb 1-1: config 0 has no interface number 0 [ 40.152306][ T12] usb 1-1: config 0 interface 171 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 8 [ 40.162159][ T12] usb 1-1: config 0 interface 171 altsetting 0 bulk endpoint 0x8C has invalid maxpacket 8 [ 40.172126][ T12] usb 1-1: New USB device found, idVendor=9022, idProduct=d632, bcdDevice=5d.35 [ 40.181160][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.190311][ T12] usb 1-1: config 0 descriptor?? [ 40.249626][ T12] dw2102: su3000_identify_state [ 40.254555][ T12] dvb-usb: found a 'TeVii S632 USB' in warm state. [ 40.261156][ T12] dw2102: su3000_power_ctrl: 1, initialized 0 [ 40.277866][ T12] dvb-usb: bulk message failed: -71 (2/0) [ 40.284910][ T12] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 40.308135][ T12] dvbdev: DVB: registering new adapter (TeVii S632 USB) [ 40.315157][ T12] usb 1-1: media controller created [ 40.337860][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.343691][ T12] dw2102: i2c transfer failed. [ 40.367856][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.373651][ T12] dw2102: i2c transfer failed. [ 40.397827][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.403554][ T12] dw2102: i2c transfer failed. executing program [ 40.427818][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.433585][ T12] dw2102: i2c transfer failed. [ 40.457838][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.463608][ T12] dw2102: i2c transfer failed. [ 40.487962][ T12] dvb-usb: bulk message failed: -71 (6/0) [ 40.493751][ T12] dw2102: i2c transfer failed. [ 40.498574][ T12] dvb-usb: MAC address: 02:02:02:02:02:02 [ 40.508098][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 40.537841][ T12] dvb-usb: bulk message failed: -71 (1/0) [ 40.543587][ T12] dw2102: command 0x51 transfer failed. [ 40.577874][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.583668][ T12] dw2102: i2c transfer failed. [ 40.607876][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.613608][ T12] dw2102: i2c transfer failed. [ 40.637934][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.643661][ T12] dw2102: i2c transfer failed. [ 40.667830][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.673587][ T12] dw2102: i2c transfer failed. [ 40.697838][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.703577][ T12] dw2102: i2c transfer failed. [ 40.727818][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.733537][ T12] dw2102: i2c transfer failed. [ 40.807846][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.813584][ T12] dw2102: i2c transfer failed. [ 40.837826][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.843550][ T12] dw2102: i2c transfer failed. [ 40.867880][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.873600][ T12] dw2102: i2c transfer failed. [ 40.897849][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.903577][ T12] dw2102: i2c transfer failed. [ 40.927823][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.933581][ T12] dw2102: i2c transfer failed. [ 40.957838][ T12] dvb-usb: bulk message failed: -71 (5/0) [ 40.963623][ T12] dw2102: i2c transfer failed. [ 40.968459][ T12] ts2020 0-0060: Montage Technology TS2020 successfully identified [ 40.976815][ T12] dw2102: Attached RS2000/TS2020! [ 40.982108][ T12] usb 1-1: DVB: registering adapter 0 frontend 0 (M88RS2000 DVB-S)... [ 40.990490][ T12] dvbdev: dvb_create_media_entity: media entity 'M88RS2000 DVB-S' registered. [ 41.048022][ T12] Registered IR keymap rc-su3000 [ 41.053496][ T12] rc rc0: TeVii S632 USB as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0 [ 41.062791][ T12] input: TeVii S632 USB as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0/input5 [ 41.073071][ T12] dvb-usb: schedule remote query interval to 150 msecs. [ 41.080084][ T12] dw2102: su3000_power_ctrl: 0, initialized 1 [ 41.086137][ T12] dvb-usb: TeVii S632 USB successfully initialized and connected. [ 41.095688][ T12] usb 1-1: USB disconnect, device number 2 [ 41.102570][ T12] ================================================================== [ 41.110676][ T12] BUG: KASAN: use-after-free in dvb_usb_device_exit+0x19a/0x1a0 [ 41.118286][ T12] Read of size 8 at addr ffff8881d2d714e0 by task kworker/0:1/12 [ 41.125978][ T12] [ 41.128310][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0 [ 41.135301][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.145341][ T12] Workqueue: usb_hub_wq hub_event [ 41.150336][ T12] Call Trace: [ 41.153607][ T12] dump_stack+0xca/0x13e [ 41.157834][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.163092][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.168358][ T12] print_address_description+0x6a/0x32c [ 41.173886][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.179155][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.184417][ T12] __kasan_report.cold+0x1a/0x33 [ 41.189334][ T12] ? _raw_spin_unlock_bh+0x10/0x30 [ 41.194419][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.199727][ T12] kasan_report+0xe/0x12 [ 41.203943][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 41.209027][ T12] ? dvb_usb_exit+0x290/0x290 [ 41.213692][ T12] ? usb_disable_endpoint+0x1ba/0x1f0 [ 41.219045][ T12] ? usb_disable_interface+0x140/0x1a0 [ 41.224482][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 41.229658][ T12] ? usb_autoresume_device+0x60/0x60 [ 41.234940][ T12] device_release_driver_internal+0x42f/0x500 [ 41.240981][ T12] bus_remove_device+0x2dc/0x4a0 [ 41.245896][ T12] device_del+0x420/0xb10 [ 41.250205][ T12] ? __device_links_no_driver+0x240/0x240 [ 41.255904][ T12] ? usb_remove_ep_devs+0x3e/0x80 [ 41.260927][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 41.266189][ T12] usb_disable_device+0x211/0x690 [ 41.271190][ T12] usb_disconnect+0x284/0x8d0 [ 41.275849][ T12] hub_event+0x1454/0x3640 [ 41.280245][ T12] ? find_held_lock+0x2d/0x110 [ 41.284990][ T12] ? mark_held_locks+0xe0/0xe0 [ 41.289729][ T12] ? hub_port_debounce+0x260/0x260 [ 41.294817][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 41.300350][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 41.305611][ T12] process_one_work+0x92b/0x1530 [ 41.310528][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 41.315875][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 41.320926][ T12] worker_thread+0x7ab/0xe20 [ 41.325505][ T12] ? process_one_work+0x1530/0x1530 [ 41.330689][ T12] kthread+0x318/0x420 [ 41.334739][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 41.340119][ T12] ret_from_fork+0x24/0x30 [ 41.344507][ T12] [ 41.346812][ T12] Allocated by task 12: [ 41.350947][ T12] save_stack+0x1b/0x80 [ 41.355078][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 41.360684][ T12] __kmalloc_track_caller+0xfd/0x330 [ 41.365989][ T12] kmemdup+0x23/0x50 [ 41.369885][ T12] dw2102_probe+0x627/0xc40 [ 41.374371][ T12] usb_probe_interface+0x305/0x7a0 [ 41.379471][ T12] really_probe+0x281/0x6d0 [ 41.383949][ T12] driver_probe_device+0x101/0x1b0 [ 41.389035][ T12] __device_attach_driver+0x1c2/0x220 [ 41.394381][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.399208][ T12] __device_attach+0x217/0x360 [ 41.403945][ T12] bus_probe_device+0x1e4/0x290 [ 41.408871][ T12] device_add+0xae6/0x16f0 [ 41.413261][ T12] usb_set_configuration+0xdf6/0x1670 [ 41.418610][ T12] generic_probe+0x9d/0xd5 [ 41.423001][ T12] usb_probe_device+0x99/0x100 [ 41.427747][ T12] really_probe+0x281/0x6d0 [ 41.432234][ T12] driver_probe_device+0x101/0x1b0 [ 41.437319][ T12] __device_attach_driver+0x1c2/0x220 [ 41.442666][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.447498][ T12] __device_attach+0x217/0x360 [ 41.452235][ T12] bus_probe_device+0x1e4/0x290 [ 41.457074][ T12] device_add+0xae6/0x16f0 [ 41.461464][ T12] usb_new_device.cold+0x6a4/0xe79 [ 41.466547][ T12] hub_event+0x1b5c/0x3640 [ 41.470947][ T12] process_one_work+0x92b/0x1530 [ 41.475872][ T12] worker_thread+0x96/0xe20 [ 41.480353][ T12] kthread+0x318/0x420 [ 41.484402][ T12] ret_from_fork+0x24/0x30 [ 41.488787][ T12] [ 41.491090][ T12] Freed by task 12: [ 41.494876][ T12] save_stack+0x1b/0x80 [ 41.499006][ T12] __kasan_slab_free+0x130/0x180 [ 41.503917][ T12] kfree+0xe4/0x2f0 [ 41.507701][ T12] dw2102_probe+0x871/0xc40 [ 41.512184][ T12] usb_probe_interface+0x305/0x7a0 [ 41.517269][ T12] really_probe+0x281/0x6d0 [ 41.521750][ T12] driver_probe_device+0x101/0x1b0 [ 41.526849][ T12] __device_attach_driver+0x1c2/0x220 [ 41.532294][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.537129][ T12] __device_attach+0x217/0x360 [ 41.541869][ T12] bus_probe_device+0x1e4/0x290 [ 41.546694][ T12] device_add+0xae6/0x16f0 [ 41.551088][ T12] usb_set_configuration+0xdf6/0x1670 [ 41.556451][ T12] generic_probe+0x9d/0xd5 [ 41.560858][ T12] usb_probe_device+0x99/0x100 [ 41.565597][ T12] really_probe+0x281/0x6d0 [ 41.570072][ T12] driver_probe_device+0x101/0x1b0 [ 41.575159][ T12] __device_attach_driver+0x1c2/0x220 [ 41.580502][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.585331][ T12] __device_attach+0x217/0x360 [ 41.590070][ T12] bus_probe_device+0x1e4/0x290 [ 41.594901][ T12] device_add+0xae6/0x16f0 [ 41.599295][ T12] usb_new_device.cold+0x6a4/0xe79 [ 41.604382][ T12] hub_event+0x1b5c/0x3640 [ 41.608799][ T12] process_one_work+0x92b/0x1530 [ 41.613720][ T12] worker_thread+0x96/0xe20 [ 41.618197][ T12] kthread+0x318/0x420 [ 41.622241][ T12] ret_from_fork+0x24/0x30 [ 41.626625][ T12] [ 41.628931][ T12] The buggy address belongs to the object at ffff8881d2d71100 [ 41.628931][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 41.642968][ T12] The buggy address is located 992 bytes inside of [ 41.642968][ T12] 4096-byte region [ffff8881d2d71100, ffff8881d2d72100) [ 41.656300][ T12] The buggy address belongs to the page: [ 41.661923][ T12] page:ffffea00074b5c00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 41.672829][ T12] flags: 0x200000000010200(slab|head) [ 41.678178][ T12] raw: 0200000000010200 0000000000000000 0000000100000001 ffff8881da00c280 [ 41.686739][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 41.695294][ T12] page dumped because: kasan: bad access detected [ 41.701674][ T12] [ 41.703987][ T12] Memory state around the buggy address: [ 41.709593][ T12] ffff8881d2d71380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.717628][ T12] ffff8881d2d71400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.725664][ T12] >ffff8881d2d71480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.733799][ T12] ^ [ 41.740977][ T12] ffff8881d2d71500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.749034][ T12] ffff8881d2d71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.757070][ T12] ================================================================== [ 41.765109][ T12] Disabling lock debugging due to kernel taint [ 41.771306][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 41.777895][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0+ #0 [ 41.786296][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.796334][ T12] Workqueue: usb_hub_wq hub_event [ 41.801332][ T12] Call Trace: [ 41.804615][ T12] dump_stack+0xca/0x13e [ 41.808841][ T12] panic+0x2a3/0x6da [ 41.812716][ T12] ? add_taint.cold+0x16/0x16 [ 41.817368][ T12] ? retint_kernel+0x10/0x10 [ 41.821948][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 41.826981][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.832310][ T12] end_report+0x43/0x49 [ 41.836452][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.841728][ T12] __kasan_report.cold+0xd/0x33 [ 41.846559][ T12] ? _raw_spin_unlock_bh+0x10/0x30 [ 41.851667][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 41.856928][ T12] kasan_report+0xe/0x12 [ 41.861142][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 41.866231][ T12] ? dvb_usb_exit+0x290/0x290 [ 41.870883][ T12] ? usb_disable_endpoint+0x1ba/0x1f0 [ 41.876227][ T12] ? usb_disable_interface+0x140/0x1a0 [ 41.881659][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 41.886839][ T12] ? usb_autoresume_device+0x60/0x60 [ 41.892103][ T12] device_release_driver_internal+0x42f/0x500 [ 41.898150][ T12] bus_remove_device+0x2dc/0x4a0 [ 41.903062][ T12] device_del+0x420/0xb10 [ 41.907367][ T12] ? __device_links_no_driver+0x240/0x240 [ 41.913062][ T12] ? usb_remove_ep_devs+0x3e/0x80 [ 41.918067][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 41.923336][ T12] usb_disable_device+0x211/0x690 [ 41.928336][ T12] usb_disconnect+0x284/0x8d0 [ 41.933051][ T12] hub_event+0x1454/0x3640 [ 41.937442][ T12] ? find_held_lock+0x2d/0x110 [ 41.942222][ T12] ? mark_held_locks+0xe0/0xe0 [ 41.946960][ T12] ? hub_port_debounce+0x260/0x260 [ 41.952082][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 41.957605][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 41.962866][ T12] process_one_work+0x92b/0x1530 [ 41.967779][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 41.973128][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 41.978169][ T12] worker_thread+0x7ab/0xe20 [ 41.982737][ T12] ? process_one_work+0x1530/0x1530 [ 41.987908][ T12] kthread+0x318/0x420 [ 41.991951][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 41.997411][ T12] ret_from_fork+0x24/0x30 [ 42.002682][ T12] Kernel Offset: disabled [ 42.007018][ T12] Rebooting in 86400 seconds..