[info] Using makefile-style concurrent boot in runlevel 2. [ 15.798798][ 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 '10.128.10.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.860470][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 27.100394][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 27.220566][ T12] usb 1-1: config 0 has an invalid interface number: 110 but max is 0 [ 27.229030][ T12] usb 1-1: config 0 has no interface number 0 [ 27.235245][ T12] usb 1-1: New USB device found, idVendor=9022, idProduct=d421, bcdDevice=ba.58 [ 27.244374][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 27.254336][ T12] usb 1-1: config 0 descriptor?? [ 27.292647][ T12] dw2102: su3000_identify_state [ 27.297648][ T12] dvb-usb: found a 'TeVii S421 PCI' in warm state. [ 27.304315][ T12] dw2102: su3000_power_ctrl: 1, initialized 0 [ 27.310811][ T12] dvb-usb: bulk message failed: -22 (2/256) [ 27.318419][ T12] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 27.340852][ T12] dvbdev: DVB: registering new adapter (TeVii S421 PCI) [ 27.347971][ T12] usb 1-1: media controller created [ 27.353664][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.360459][ T12] dw2102: i2c transfer failed. [ 27.365345][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.371969][ T12] dw2102: i2c transfer failed. [ 27.376751][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.383383][ T12] dw2102: i2c transfer failed. [ 27.388189][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.394831][ T12] dw2102: i2c transfer failed. [ 27.399610][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.406229][ T12] dw2102: i2c transfer failed. [ 27.411170][ T12] dvb-usb: bulk message failed: -22 (6/-2036301816) [ 27.417742][ T12] dw2102: i2c transfer failed. [ 27.422548][ T12] dvb-usb: MAC address: 02:02:02:02:02:02 [ 27.432351][ T12] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 27.447487][ T12] dvb-usb: bulk message failed: -22 (1/0) [ 27.453347][ T12] dw2102: command 0x51 transfer failed. [ 27.460459][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.467132][ T12] dw2102: i2c transfer failed. [ 27.472075][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.478661][ T12] dw2102: i2c transfer failed. [ 27.483465][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.490039][ T12] dw2102: i2c transfer failed. executing program [ 27.495857][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.502753][ T12] dw2102: i2c transfer failed. [ 27.507559][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.514193][ T12] dw2102: i2c transfer failed. [ 27.518962][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.525591][ T12] dw2102: i2c transfer failed. [ 27.580504][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.587139][ T12] dw2102: i2c transfer failed. [ 27.591988][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.598570][ T12] dw2102: i2c transfer failed. [ 27.603390][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.609971][ T12] dw2102: i2c transfer failed. [ 27.614845][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.621470][ T12] dw2102: i2c transfer failed. [ 27.626238][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.632846][ T12] dw2102: i2c transfer failed. [ 27.637611][ T12] dvb-usb: bulk message failed: -22 (5/-2036301816) [ 27.644238][ T12] dw2102: i2c transfer failed. [ 27.649020][ T12] ts2020 0-0060: Montage Technology TS2020 successfully identified [ 27.657510][ T12] dw2102: Attached RS2000/TS2020! [ 27.662728][ T12] usb 1-1: DVB: registering adapter 0 frontend 0 (M88RS2000 DVB-S)... [ 27.671129][ T12] dvbdev: dvb_create_media_entity: media entity 'M88RS2000 DVB-S' registered. [ 27.730667][ T12] Registered IR keymap rc-su3000 [ 27.736213][ T12] rc rc0: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0 [ 27.745546][ T12] input: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0/input5 [ 27.756220][ T12] dvb-usb: schedule remote query interval to 150 msecs. [ 27.763345][ T12] dw2102: su3000_power_ctrl: 0, initialized 1 [ 27.769411][ T12] dvb-usb: TeVii S421 PCI successfully initialized and connected. [ 27.778607][ T12] usb 1-1: USB disconnect, device number 2 [ 27.785092][ T12] ================================================================== [ 27.793223][ T12] BUG: KASAN: use-after-free in dvb_usb_device_exit+0x19a/0x1a0 [ 27.800831][ T12] Read of size 8 at addr ffff8881cf9a62e8 by task kworker/0:1/12 [ 27.808530][ T12] [ 27.810846][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc6+ #0 [ 27.818186][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.828265][ T12] Workqueue: usb_hub_wq hub_event [ 27.833285][ T12] Call Trace: [ 27.836566][ T12] dump_stack+0xca/0x13e [ 27.840789][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 27.846063][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 27.851336][ T12] print_address_description.constprop.0+0x36/0x50 [ 27.857820][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 27.863092][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 27.868355][ T12] __kasan_report.cold+0x1a/0x33 [ 27.873279][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 27.878551][ T12] kasan_report+0xe/0x20 [ 27.882787][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 27.887873][ T12] ? dvb_usb_exit+0x290/0x290 [ 27.892530][ T12] ? mark_held_locks+0x9f/0xe0 [ 27.897272][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 27.903051][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.909363][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 27.914711][ T12] ? __pm_runtime_resume+0x111/0x180 [ 27.919974][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 27.925239][ T12] ? usb_autoresume_device+0x60/0x60 [ 27.930506][ T12] device_release_driver_internal+0x42f/0x500 [ 27.936560][ T12] bus_remove_device+0x2dc/0x4a0 [ 27.941474][ T12] device_del+0x420/0xb20 [ 27.945791][ T12] ? __device_link_del+0x2f0/0x2f0 [ 27.950893][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 27.956153][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 27.961413][ T12] usb_disable_device+0x211/0x690 [ 27.966431][ T12] usb_disconnect+0x284/0x8d0 [ 27.971098][ T12] hub_event+0x16f2/0x3800 [ 27.975507][ T12] ? hub_port_debounce+0x260/0x260 [ 27.980595][ T12] ? find_held_lock+0x2d/0x110 [ 27.985345][ T12] ? mark_held_locks+0xe0/0xe0 [ 27.990093][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 27.995620][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 28.000883][ T12] process_one_work+0x92b/0x1530 [ 28.005813][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 28.011179][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 28.016180][ T12] worker_thread+0x7ab/0xe20 [ 28.020771][ T12] ? process_one_work+0x1530/0x1530 [ 28.025945][ T12] kthread+0x318/0x420 [ 28.029992][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 28.035341][ T12] ret_from_fork+0x24/0x30 [ 28.039738][ T12] [ 28.042041][ T12] Allocated by task 12: [ 28.046173][ T12] save_stack+0x1b/0x80 [ 28.050312][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 28.055926][ T12] __kmalloc_track_caller+0xf0/0x310 [ 28.061370][ T12] kmemdup+0x23/0x50 [ 28.065244][ T12] dw2102_probe+0x627/0xc40 [ 28.069727][ T12] usb_probe_interface+0x305/0x7a0 [ 28.074823][ T12] really_probe+0x281/0x6d0 [ 28.079317][ T12] driver_probe_device+0x104/0x210 [ 28.084412][ T12] __device_attach_driver+0x1c2/0x220 [ 28.089761][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.094611][ T12] __device_attach+0x217/0x360 [ 28.099350][ T12] bus_probe_device+0x1e4/0x290 [ 28.104186][ T12] device_add+0xae6/0x16f0 [ 28.108578][ T12] usb_set_configuration+0xdf6/0x1670 [ 28.113925][ T12] generic_probe+0x9d/0xd5 [ 28.118419][ T12] usb_probe_device+0x99/0x100 [ 28.123211][ T12] really_probe+0x281/0x6d0 [ 28.127728][ T12] driver_probe_device+0x104/0x210 [ 28.132861][ T12] __device_attach_driver+0x1c2/0x220 [ 28.138221][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.143059][ T12] __device_attach+0x217/0x360 [ 28.147840][ T12] bus_probe_device+0x1e4/0x290 [ 28.152693][ T12] device_add+0xae6/0x16f0 [ 28.157099][ T12] usb_new_device.cold+0x6a4/0xe79 [ 28.162211][ T12] hub_event+0x1df8/0x3800 [ 28.166639][ T12] process_one_work+0x92b/0x1530 [ 28.171560][ T12] worker_thread+0x96/0xe20 [ 28.176058][ T12] kthread+0x318/0x420 [ 28.180213][ T12] ret_from_fork+0x24/0x30 [ 28.184605][ T12] [ 28.186922][ T12] Freed by task 12: [ 28.190717][ T12] save_stack+0x1b/0x80 [ 28.194867][ T12] __kasan_slab_free+0x130/0x180 [ 28.199823][ T12] kfree+0xe4/0x320 [ 28.203607][ T12] dw2102_probe+0x871/0xc40 [ 28.208085][ T12] usb_probe_interface+0x305/0x7a0 [ 28.213183][ T12] really_probe+0x281/0x6d0 [ 28.217664][ T12] driver_probe_device+0x104/0x210 [ 28.222751][ T12] __device_attach_driver+0x1c2/0x220 [ 28.228106][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.232936][ T12] __device_attach+0x217/0x360 [ 28.237677][ T12] bus_probe_device+0x1e4/0x290 [ 28.242513][ T12] device_add+0xae6/0x16f0 [ 28.246916][ T12] usb_set_configuration+0xdf6/0x1670 [ 28.252265][ T12] generic_probe+0x9d/0xd5 [ 28.256657][ T12] usb_probe_device+0x99/0x100 [ 28.261418][ T12] really_probe+0x281/0x6d0 [ 28.265897][ T12] driver_probe_device+0x104/0x210 [ 28.270984][ T12] __device_attach_driver+0x1c2/0x220 [ 28.276330][ T12] bus_for_each_drv+0x162/0x1e0 [ 28.281677][ T12] __device_attach+0x217/0x360 [ 28.286418][ T12] bus_probe_device+0x1e4/0x290 [ 28.291244][ T12] device_add+0xae6/0x16f0 [ 28.295634][ T12] usb_new_device.cold+0x6a4/0xe79 [ 28.300716][ T12] hub_event+0x1df8/0x3800 [ 28.305119][ T12] process_one_work+0x92b/0x1530 [ 28.310136][ T12] worker_thread+0x96/0xe20 [ 28.314645][ T12] kthread+0x318/0x420 [ 28.318698][ T12] ret_from_fork+0x24/0x30 [ 28.323084][ T12] [ 28.325398][ T12] The buggy address belongs to the object at ffff8881cf9a6000 [ 28.325398][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 28.339426][ T12] The buggy address is located 744 bytes inside of [ 28.339426][ T12] 4096-byte region [ffff8881cf9a6000, ffff8881cf9a7000) [ 28.352768][ T12] The buggy address belongs to the page: [ 28.358378][ T12] page:ffffea00073e6800 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 28.369286][ T12] flags: 0x200000000010200(slab|head) [ 28.374723][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 28.383291][ T12] raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 [ 28.391849][ T12] page dumped because: kasan: bad access detected [ 28.398233][ T12] [ 28.400537][ T12] Memory state around the buggy address: [ 28.406148][ T12] ffff8881cf9a6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.414224][ T12] ffff8881cf9a6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.422274][ T12] >ffff8881cf9a6280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.430492][ T12] ^ [ 28.437924][ T12] ffff8881cf9a6300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.445977][ T12] ffff8881cf9a6380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.454013][ T12] ================================================================== [ 28.462066][ T12] Disabling lock debugging due to kernel taint [ 28.468262][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 28.474848][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.4.0-rc6+ #0 [ 28.483595][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.493657][ T12] Workqueue: usb_hub_wq hub_event [ 28.498661][ T12] Call Trace: [ 28.501938][ T12] dump_stack+0xca/0x13e [ 28.506167][ T12] panic+0x2aa/0x6e1 [ 28.510048][ T12] ? add_taint.cold+0x16/0x16 [ 28.514698][ T12] ? retint_kernel+0x10/0x10 [ 28.520047][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 28.525050][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 28.530311][ T12] end_report+0x43/0x49 [ 28.534447][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 28.539718][ T12] __kasan_report.cold+0xd/0x33 [ 28.544545][ T12] ? dvb_usb_device_exit+0x19a/0x1a0 [ 28.549802][ T12] kasan_report+0xe/0x20 [ 28.554023][ T12] dvb_usb_device_exit+0x19a/0x1a0 [ 28.559108][ T12] ? dvb_usb_exit+0x290/0x290 [ 28.563847][ T12] ? mark_held_locks+0x9f/0xe0 [ 28.568597][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 28.574376][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 28.579640][ T12] ? usb_disable_interface+0x7b/0x1a0 [ 28.584986][ T12] ? __pm_runtime_resume+0x111/0x180 [ 28.590258][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 28.595453][ T12] ? usb_autoresume_device+0x60/0x60 [ 28.600722][ T12] device_release_driver_internal+0x42f/0x500 [ 28.606764][ T12] bus_remove_device+0x2dc/0x4a0 [ 28.611677][ T12] device_del+0x420/0xb20 [ 28.615979][ T12] ? __device_link_del+0x2f0/0x2f0 [ 28.621067][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 28.626325][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 28.631583][ T12] usb_disable_device+0x211/0x690 [ 28.636585][ T12] usb_disconnect+0x284/0x8d0 [ 28.641235][ T12] hub_event+0x16f2/0x3800 [ 28.645628][ T12] ? hub_port_debounce+0x260/0x260 [ 28.650718][ T12] ? find_held_lock+0x2d/0x110 [ 28.655456][ T12] ? mark_held_locks+0xe0/0xe0 [ 28.660193][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 28.665724][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 28.670984][ T12] process_one_work+0x92b/0x1530 [ 28.675898][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 28.681263][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 28.686261][ T12] worker_thread+0x7ab/0xe20 [ 28.690826][ T12] ? process_one_work+0x1530/0x1530 [ 28.695998][ T12] kthread+0x318/0x420 [ 28.700050][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 28.705403][ T12] ret_from_fork+0x24/0x30 [ 28.709852][ T12] Kernel Offset: disabled [ 28.714166][ T12] Rebooting in 86400 seconds..