[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 89.608362][ T32] audit: type=1800 audit(1572191520.652:25): pid=12739 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 89.631703][ T32] audit: type=1800 audit(1572191520.672:26): pid=12739 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 89.668155][ T32] audit: type=1800 audit(1572191520.702:27): pid=12739 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.79' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.012372][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 101.252420][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 101.372461][ T12] usb 1-1: config 0 has an invalid interface number: 48 but max is 0 [ 101.380915][ T12] usb 1-1: config 0 has no interface number 0 [ 101.387273][ T12] usb 1-1: New USB device found, idVendor=2001, idProduct=3c00, bcdDevice=66.7a [ 101.396553][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 101.406069][ T12] usb 1-1: config 0 descriptor?? executing program [ 101.592309][ T12] usb 1-1: reset high-speed USB device number 2 using dummy_hcd [ 102.062409][ T12] usb 1-1: device descriptor read/64, error -71 [ 102.422324][ T12] usb 1-1: Using ep0 maxpacket: 16 executing program [ 102.822980][ T12] ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x09 failed for offset 0x0000 with error -71 [ 102.835254][ T12] ===================================================== [ 102.842342][ T12] BUG: KMSAN: uninit-value in rt2500usb_bbp_read+0x188/0x6d0 [ 102.850912][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc3+ #0 [ 102.858263][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.868616][ T12] Workqueue: usb_hub_wq hub_event [ 102.873789][ T12] Call Trace: [ 102.877095][ T12] dump_stack+0x191/0x1f0 [ 102.881448][ T12] kmsan_report+0x128/0x220 [ 102.885943][ T12] __msan_warning+0x73/0xe0 [ 102.890443][ T12] rt2500usb_bbp_read+0x188/0x6d0 [ 102.895463][ T12] rt2500usb_probe_hw+0x3b5/0x22a0 [ 102.900593][ T12] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 102.905972][ T12] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 102.911368][ T12] rt2x00lib_probe_dev+0xba9/0x3220 [ 102.916660][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.922665][ T12] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 102.928929][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.934824][ T12] rt2x00usb_probe+0x7ae/0xf60 [ 102.939683][ T12] ? mutex_unlock+0x38/0x90 [ 102.944200][ T12] rt2500usb_probe+0x50/0x60 [ 102.948810][ T12] ? rt2800_brightness_set+0xf20/0xf20 [ 102.954274][ T12] usb_probe_interface+0xd19/0x1310 [ 102.959485][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.965407][ T12] ? usb_register_driver+0x860/0x860 [ 102.970695][ T12] really_probe+0xd91/0x1f90 [ 102.975642][ T12] driver_probe_device+0x1ba/0x510 [ 102.980793][ T12] __device_attach_driver+0x5b8/0x790 [ 102.986184][ T12] bus_for_each_drv+0x28e/0x3b0 [ 102.991429][ T12] ? deferred_probe_work_func+0x400/0x400 [ 102.997158][ T12] __device_attach+0x489/0x750 [ 103.001920][ T12] device_initial_probe+0x4a/0x60 [ 103.006944][ T12] bus_probe_device+0x131/0x390 [ 103.011787][ T12] device_add+0x25b5/0x2df0 [ 103.016313][ T12] usb_set_configuration+0x309f/0x3710 [ 103.021793][ T12] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 103.028018][ T12] generic_probe+0xe7/0x280 [ 103.032603][ T12] ? usb_choose_configuration+0xae0/0xae0 [ 103.038316][ T12] usb_probe_device+0x146/0x200 [ 103.043305][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.049194][ T12] ? usb_register_device_driver+0x500/0x500 [ 103.055078][ T12] really_probe+0xd91/0x1f90 [ 103.059672][ T12] driver_probe_device+0x1ba/0x510 [ 103.064775][ T12] __device_attach_driver+0x5b8/0x790 [ 103.070160][ T12] bus_for_each_drv+0x28e/0x3b0 [ 103.075020][ T12] ? deferred_probe_work_func+0x400/0x400 [ 103.080732][ T12] __device_attach+0x489/0x750 [ 103.085491][ T12] device_initial_probe+0x4a/0x60 [ 103.090610][ T12] bus_probe_device+0x131/0x390 [ 103.095451][ T12] device_add+0x25b5/0x2df0 [ 103.099969][ T12] usb_new_device+0x23e5/0x2fb0 [ 103.104920][ T12] hub_event+0x581d/0x72f0 [ 103.109373][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.115260][ T12] ? led_work+0x720/0x720 [ 103.119588][ T12] ? led_work+0x720/0x720 [ 103.123910][ T12] process_one_work+0x1572/0x1ef0 [ 103.129033][ T12] worker_thread+0x111b/0x2460 [ 103.133799][ T12] kthread+0x4b5/0x4f0 [ 103.137866][ T12] ? process_one_work+0x1ef0/0x1ef0 [ 103.143262][ T12] ? kthread_blkcg+0xf0/0xf0 [ 103.147861][ T12] ret_from_fork+0x35/0x40 [ 103.152456][ T12] [ 103.154860][ T12] Local variable description: ----reg.i.i@rt2500usb_bbp_read [ 103.162337][ T12] Variable was created at: [ 103.166755][ T12] rt2500usb_bbp_read+0xb0/0x6d0 [ 103.171682][ T12] rt2500usb_bbp_read+0xb0/0x6d0 [ 103.176682][ T12] ===================================================== [ 103.184667][ T12] Disabling lock debugging due to kernel taint [ 103.190807][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 103.197384][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.4.0-rc3+ #0 [ 103.206128][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.216209][ T12] Workqueue: usb_hub_wq hub_event [ 103.221224][ T12] Call Trace: [ 103.224518][ T12] dump_stack+0x191/0x1f0 [ 103.228842][ T12] panic+0x3c9/0xc1e [ 103.232745][ T12] kmsan_report+0x215/0x220 [ 103.237961][ T12] __msan_warning+0x73/0xe0 [ 103.242459][ T12] rt2500usb_bbp_read+0x188/0x6d0 [ 103.247475][ T12] rt2500usb_probe_hw+0x3b5/0x22a0 [ 103.252577][ T12] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 103.257961][ T12] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 103.263592][ T12] rt2x00lib_probe_dev+0xba9/0x3220 [ 103.268818][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.274822][ T12] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 103.280978][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.287005][ T12] rt2x00usb_probe+0x7ae/0xf60 [ 103.291770][ T12] ? mutex_unlock+0x38/0x90 [ 103.296266][ T12] rt2500usb_probe+0x50/0x60 [ 103.300842][ T12] ? rt2800_brightness_set+0xf20/0xf20 [ 103.306292][ T12] usb_probe_interface+0xd19/0x1310 [ 103.311493][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.317481][ T12] ? usb_register_driver+0x860/0x860 [ 103.322757][ T12] really_probe+0xd91/0x1f90 [ 103.327465][ T12] driver_probe_device+0x1ba/0x510 [ 103.332588][ T12] __device_attach_driver+0x5b8/0x790 [ 103.337952][ T12] bus_for_each_drv+0x28e/0x3b0 [ 103.342820][ T12] ? deferred_probe_work_func+0x400/0x400 [ 103.348677][ T12] __device_attach+0x489/0x750 [ 103.353601][ T12] device_initial_probe+0x4a/0x60 [ 103.358817][ T12] bus_probe_device+0x131/0x390 [ 103.363666][ T12] device_add+0x25b5/0x2df0 [ 103.368326][ T12] usb_set_configuration+0x309f/0x3710 [ 103.373791][ T12] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 103.379944][ T12] generic_probe+0xe7/0x280 [ 103.384452][ T12] ? usb_choose_configuration+0xae0/0xae0 [ 103.390167][ T12] usb_probe_device+0x146/0x200 [ 103.395170][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.401079][ T12] ? usb_register_device_driver+0x500/0x500 [ 103.407187][ T12] really_probe+0xd91/0x1f90 [ 103.411914][ T12] driver_probe_device+0x1ba/0x510 [ 103.417244][ T12] __device_attach_driver+0x5b8/0x790 [ 103.423180][ T12] bus_for_each_drv+0x28e/0x3b0 [ 103.428397][ T12] ? deferred_probe_work_func+0x400/0x400 [ 103.434191][ T12] __device_attach+0x489/0x750 [ 103.438961][ T12] device_initial_probe+0x4a/0x60 [ 103.443993][ T12] bus_probe_device+0x131/0x390 [ 103.449052][ T12] device_add+0x25b5/0x2df0 [ 103.453732][ T12] usb_new_device+0x23e5/0x2fb0 [ 103.458578][ T12] hub_event+0x581d/0x72f0 [ 103.463023][ T12] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 103.468908][ T12] ? led_work+0x720/0x720 [ 103.473240][ T12] ? led_work+0x720/0x720 [ 103.477563][ T12] process_one_work+0x1572/0x1ef0 [ 103.482596][ T12] worker_thread+0x111b/0x2460 [ 103.488329][ T12] kthread+0x4b5/0x4f0 [ 103.492385][ T12] ? process_one_work+0x1ef0/0x1ef0 [ 103.497579][ T12] ? kthread_blkcg+0xf0/0xf0 [ 103.502191][ T12] ret_from_fork+0x35/0x40 [ 103.508673][ T12] Kernel Offset: disabled [ 103.513129][ T12] Rebooting in 86400 seconds..