[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.654242][ T30] audit: type=1800 audit(1565633728.717:25): pid=10890 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.677263][ T30] audit: type=1800 audit(1565633728.737:26): pid=10890 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.714174][ T30] audit: type=1800 audit(1565633728.767:27): pid=10890 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 '10.128.0.220' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.162162][ T621] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 87.402172][ T621] usb 1-1: Using ep0 maxpacket: 16 [ 87.522320][ T621] usb 1-1: config 0 has an invalid interface number: 219 but max is 0 [ 87.530723][ T621] usb 1-1: config 0 has no interface number 0 [ 87.537032][ T621] usb 1-1: New USB device found, idVendor=078c, idProduct=1002, bcdDevice=e6.47 [ 87.555141][ T621] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 87.564591][ T621] usb 1-1: config 0 descriptor?? [ 87.822376][ T621] gtco 1-1:0.219: Collection level already at zero [ 87.829067][ T621] ================================================================== [ 87.837137][ T621] BUG: KMSAN: uninit-value in gtco_probe+0x18c7/0x3520 [ 87.844244][ T621] CPU: 1 PID: 621 Comm: kworker/1:1 Not tainted 5.3.0-rc3+ #17 [ 87.851801][ T621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.861854][ T621] Workqueue: usb_hub_wq hub_event [ 87.866957][ T621] Call Trace: [ 87.870232][ T621] dump_stack+0x191/0x1f0 [ 87.874548][ T621] kmsan_report+0x162/0x2d0 [ 87.879029][ T621] __msan_warning+0x75/0xe0 [ 87.883569][ T621] gtco_probe+0x18c7/0x3520 [ 87.888081][ T621] ? store_tabletExecute+0x120/0x120 [ 87.893441][ T621] ? store_tabletExecute+0x120/0x120 [ 87.908899][ T621] usb_probe_interface+0xd19/0x1310 [ 87.914088][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 87.920047][ T621] ? usb_register_driver+0x7d0/0x7d0 [ 87.925312][ T621] really_probe+0x1373/0x1dc0 [ 87.929972][ T621] driver_probe_device+0x1ba/0x510 [ 87.935079][ T621] __device_attach_driver+0x5b8/0x790 [ 87.940520][ T621] ? bus_for_each_drv+0x1d5/0x3b0 [ 87.945523][ T621] bus_for_each_drv+0x28e/0x3b0 [ 87.950352][ T621] ? deferred_probe_work_func+0x400/0x400 [ 87.961981][ T621] __device_attach+0x489/0x750 [ 87.976726][ T621] device_initial_probe+0x4a/0x60 [ 87.981732][ T621] bus_probe_device+0x131/0x390 [ 87.986566][ T621] device_add+0x25b5/0x2df0 [ 87.997051][ T621] ? usb_set_configuration+0x3036/0x3710 [ 88.002665][ T621] usb_set_configuration+0x309f/0x3710 [ 88.008125][ T621] generic_probe+0xe7/0x280 [ 88.012610][ T621] ? usb_probe_device+0x104/0x200 [ 88.017612][ T621] ? usb_choose_configuration+0xae0/0xae0 [ 88.023314][ T621] usb_probe_device+0x146/0x200 [ 88.028148][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 88.034367][ T621] ? usb_register_device_driver+0x470/0x470 [ 88.040521][ T621] really_probe+0x1373/0x1dc0 [ 88.045274][ T621] driver_probe_device+0x1ba/0x510 [ 88.050469][ T621] __device_attach_driver+0x5b8/0x790 [ 88.055836][ T621] ? bus_for_each_drv+0x1d5/0x3b0 [ 88.060866][ T621] bus_for_each_drv+0x28e/0x3b0 [ 88.065703][ T621] ? deferred_probe_work_func+0x400/0x400 [ 88.071402][ T621] __device_attach+0x489/0x750 [ 88.076150][ T621] device_initial_probe+0x4a/0x60 [ 88.081163][ T621] bus_probe_device+0x131/0x390 [ 88.086001][ T621] device_add+0x25b5/0x2df0 [ 88.090519][ T621] usb_new_device+0x23e5/0x2fb0 [ 88.095379][ T621] hub_event+0x581d/0x72f0 [ 88.099806][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 88.105762][ T621] ? led_work+0x720/0x720 [ 88.110066][ T621] ? led_work+0x720/0x720 [ 88.114378][ T621] process_one_work+0x1572/0x1ef0 [ 88.119391][ T621] worker_thread+0x111b/0x2460 [ 88.124146][ T621] kthread+0x4b5/0x4f0 [ 88.128190][ T621] ? process_one_work+0x1ef0/0x1ef0 [ 88.133367][ T621] ? kthread_blkcg+0xf0/0xf0 [ 88.137936][ T621] ret_from_fork+0x35/0x40 [ 88.142348][ T621] [ 88.144654][ T621] Uninit was stored to memory at: [ 88.149656][ T621] kmsan_internal_chain_origin+0xcc/0x150 [ 88.155357][ T621] __msan_chain_origin+0x6b/0xe0 [ 88.160273][ T621] gtco_probe+0x1a7c/0x3520 [ 88.164757][ T621] usb_probe_interface+0xd19/0x1310 [ 88.169948][ T621] really_probe+0x1373/0x1dc0 [ 88.174605][ T621] driver_probe_device+0x1ba/0x510 [ 88.179691][ T621] __device_attach_driver+0x5b8/0x790 [ 88.185048][ T621] bus_for_each_drv+0x28e/0x3b0 [ 88.190135][ T621] __device_attach+0x489/0x750 [ 88.194909][ T621] device_initial_probe+0x4a/0x60 [ 88.199914][ T621] bus_probe_device+0x131/0x390 [ 88.204746][ T621] device_add+0x25b5/0x2df0 [ 88.209225][ T621] usb_set_configuration+0x309f/0x3710 [ 88.214682][ T621] generic_probe+0xe7/0x280 [ 88.219166][ T621] usb_probe_device+0x146/0x200 [ 88.223990][ T621] really_probe+0x1373/0x1dc0 [ 88.228640][ T621] driver_probe_device+0x1ba/0x510 [ 88.233747][ T621] __device_attach_driver+0x5b8/0x790 [ 88.239105][ T621] bus_for_each_drv+0x28e/0x3b0 [ 88.243943][ T621] __device_attach+0x489/0x750 [ 88.248685][ T621] device_initial_probe+0x4a/0x60 [ 88.253684][ T621] bus_probe_device+0x131/0x390 [ 88.258523][ T621] device_add+0x25b5/0x2df0 [ 88.263007][ T621] usb_new_device+0x23e5/0x2fb0 [ 88.267829][ T621] hub_event+0x581d/0x72f0 [ 88.272230][ T621] process_one_work+0x1572/0x1ef0 [ 88.277228][ T621] worker_thread+0x111b/0x2460 [ 88.281964][ T621] kthread+0x4b5/0x4f0 [ 88.286005][ T621] ret_from_fork+0x35/0x40 [ 88.290390][ T621] [ 88.292699][ T621] Local variable description: ----globalval.i@gtco_probe [ 88.299719][ T621] Variable was created at: [ 88.304123][ T621] gtco_probe+0xcd6/0x3520 [ 88.308516][ T621] usb_probe_interface+0xd19/0x1310 [ 88.313703][ T621] ================================================================== [ 88.321735][ T621] Disabling lock debugging due to kernel taint [ 88.327876][ T621] Kernel panic - not syncing: panic_on_warn set ... [ 88.334447][ T621] CPU: 1 PID: 621 Comm: kworker/1:1 Tainted: G B 5.3.0-rc3+ #17 [ 88.343364][ T621] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.353419][ T621] Workqueue: usb_hub_wq hub_event [ 88.358432][ T621] Call Trace: [ 88.361714][ T621] dump_stack+0x191/0x1f0 [ 88.366029][ T621] panic+0x3c9/0xc1e [ 88.370093][ T621] kmsan_report+0x2ca/0x2d0 [ 88.374588][ T621] __msan_warning+0x75/0xe0 [ 88.380135][ T621] gtco_probe+0x18c7/0x3520 [ 88.384659][ T621] ? store_tabletExecute+0x120/0x120 [ 88.389922][ T621] ? store_tabletExecute+0x120/0x120 [ 88.395206][ T621] usb_probe_interface+0xd19/0x1310 [ 88.400487][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 88.406937][ T621] ? usb_register_driver+0x7d0/0x7d0 [ 88.412204][ T621] really_probe+0x1373/0x1dc0 [ 88.416897][ T621] driver_probe_device+0x1ba/0x510 [ 88.422010][ T621] __device_attach_driver+0x5b8/0x790 [ 88.427380][ T621] ? bus_for_each_drv+0x1d5/0x3b0 [ 88.432518][ T621] bus_for_each_drv+0x28e/0x3b0 [ 88.437350][ T621] ? deferred_probe_work_func+0x400/0x400 [ 88.443050][ T621] __device_attach+0x489/0x750 [ 88.447907][ T621] device_initial_probe+0x4a/0x60 [ 88.452925][ T621] bus_probe_device+0x131/0x390 [ 88.457764][ T621] device_add+0x25b5/0x2df0 [ 88.462259][ T621] ? usb_set_configuration+0x3036/0x3710 [ 88.467872][ T621] usb_set_configuration+0x309f/0x3710 [ 88.473343][ T621] generic_probe+0xe7/0x280 [ 88.477824][ T621] ? usb_probe_device+0x104/0x200 [ 88.482845][ T621] ? usb_choose_configuration+0xae0/0xae0 [ 88.488649][ T621] usb_probe_device+0x146/0x200 [ 88.493485][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 88.499449][ T621] ? usb_register_device_driver+0x470/0x470 [ 88.505322][ T621] really_probe+0x1373/0x1dc0 [ 88.510006][ T621] driver_probe_device+0x1ba/0x510 [ 88.515105][ T621] __device_attach_driver+0x5b8/0x790 [ 88.520460][ T621] ? bus_for_each_drv+0x1d5/0x3b0 [ 88.525463][ T621] bus_for_each_drv+0x28e/0x3b0 [ 88.530286][ T621] ? deferred_probe_work_func+0x400/0x400 [ 88.535988][ T621] __device_attach+0x489/0x750 [ 88.540827][ T621] device_initial_probe+0x4a/0x60 [ 88.545855][ T621] bus_probe_device+0x131/0x390 [ 88.550693][ T621] device_add+0x25b5/0x2df0 [ 88.555361][ T621] usb_new_device+0x23e5/0x2fb0 [ 88.560201][ T621] hub_event+0x581d/0x72f0 [ 88.564635][ T621] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 88.570593][ T621] ? led_work+0x720/0x720 [ 88.574906][ T621] ? led_work+0x720/0x720 [ 88.579219][ T621] process_one_work+0x1572/0x1ef0 [ 88.584248][ T621] worker_thread+0x111b/0x2460 [ 88.589005][ T621] kthread+0x4b5/0x4f0 [ 88.593061][ T621] ? process_one_work+0x1ef0/0x1ef0 [ 88.598256][ T621] ? kthread_blkcg+0xf0/0xf0 [ 88.602905][ T621] ret_from_fork+0x35/0x40 [ 88.608789][ T621] Kernel Offset: disabled [ 88.613140][ T621] Rebooting in 86400 seconds..