[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.993875][ T32] audit: type=1800 audit(1568456634.045:25): pid=11176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.017167][ T32] audit: type=1800 audit(1568456634.065:26): pid=11176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.052908][ T32] audit: type=1800 audit(1568456634.085:27): pid=11176 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 84.972020][ T3356] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 85.212019][ T3356] usb 1-1: Using ep0 maxpacket: 16 [ 85.332153][ T3356] usb 1-1: config 0 has an invalid interface number: 219 but max is 0 [ 85.340395][ T3356] usb 1-1: config 0 has no interface number 0 [ 85.346700][ T3356] usb 1-1: New USB device found, idVendor=078c, idProduct=1002, bcdDevice=e6.47 [ 85.355850][ T3356] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 85.367167][ T3356] usb 1-1: config 0 descriptor?? [ 85.622189][ T3356] gtco 1-1:0.219: Collection level already at zero [ 85.628719][ T3356] ================================================================== [ 85.637070][ T3356] BUG: KMSAN: uninit-value in gtco_probe+0x18c7/0x3520 [ 85.643898][ T3356] CPU: 1 PID: 3356 Comm: kworker/1:2 Not tainted 5.3.0-rc7+ #0 [ 85.651601][ T3356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.666589][ T3356] Workqueue: usb_hub_wq hub_event [ 85.671592][ T3356] Call Trace: [ 85.674950][ T3356] dump_stack+0x191/0x1f0 [ 85.679259][ T3356] kmsan_report+0x162/0x2d0 [ 85.683746][ T3356] __msan_warning+0x75/0xe0 [ 85.688762][ T3356] gtco_probe+0x18c7/0x3520 [ 85.693268][ T3356] ? store_tabletExecute+0x120/0x120 [ 85.698533][ T3356] ? store_tabletExecute+0x120/0x120 [ 85.703983][ T3356] ? store_tabletExecute+0x120/0x120 [ 85.709526][ T3356] usb_probe_interface+0xd19/0x1310 [ 85.714826][ T3356] ? usb_register_driver+0x7d0/0x7d0 [ 85.720088][ T3356] really_probe+0x1373/0x1dc0 [ 85.725630][ T3356] driver_probe_device+0x1ba/0x510 [ 85.730820][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 85.736761][ T3356] __device_attach_driver+0x5b8/0x790 [ 85.742221][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 85.747051][ T3356] ? deferred_probe_work_func+0x400/0x400 [ 85.752847][ T3356] __device_attach+0x489/0x750 [ 85.757592][ T3356] device_initial_probe+0x4a/0x60 [ 85.762600][ T3356] bus_probe_device+0x131/0x390 [ 85.767545][ T3356] device_add+0x25b5/0x2df0 [ 85.772078][ T3356] usb_set_configuration+0x309f/0x3710 [ 85.777642][ T3356] generic_probe+0xe7/0x280 [ 85.782152][ T3356] ? usb_choose_configuration+0xae0/0xae0 [ 85.787876][ T3356] usb_probe_device+0x146/0x200 [ 85.792713][ T3356] ? usb_register_device_driver+0x470/0x470 [ 85.799197][ T3356] really_probe+0x1373/0x1dc0 [ 85.803876][ T3356] driver_probe_device+0x1ba/0x510 [ 85.808971][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 85.814870][ T3356] __device_attach_driver+0x5b8/0x790 [ 85.820227][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 85.825070][ T3356] ? deferred_probe_work_func+0x400/0x400 [ 85.830773][ T3356] __device_attach+0x489/0x750 [ 85.835518][ T3356] device_initial_probe+0x4a/0x60 [ 85.840609][ T3356] bus_probe_device+0x131/0x390 [ 85.846093][ T3356] device_add+0x25b5/0x2df0 [ 85.852252][ T3356] usb_new_device+0x23e5/0x2fb0 [ 85.857291][ T3356] hub_event+0x581d/0x72f0 [ 85.862374][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 85.868351][ T3356] ? led_work+0x720/0x720 [ 85.872659][ T3356] ? led_work+0x720/0x720 [ 85.877060][ T3356] process_one_work+0x1572/0x1ef0 [ 85.882264][ T3356] worker_thread+0x111b/0x2460 [ 85.887020][ T3356] kthread+0x4b5/0x4f0 [ 85.891211][ T3356] ? process_one_work+0x1ef0/0x1ef0 [ 85.897084][ T3356] ? kthread_blkcg+0xf0/0xf0 [ 85.904606][ T3356] ret_from_fork+0x35/0x40 [ 85.909015][ T3356] [ 85.911319][ T3356] Uninit was stored to memory at: [ 85.918504][ T3356] kmsan_internal_chain_origin+0xcc/0x150 [ 85.924549][ T3356] __msan_chain_origin+0x6b/0xe0 [ 85.929565][ T3356] gtco_probe+0x1a7c/0x3520 [ 85.934144][ T3356] usb_probe_interface+0xd19/0x1310 [ 85.939927][ T3356] really_probe+0x1373/0x1dc0 [ 85.944843][ T3356] driver_probe_device+0x1ba/0x510 [ 85.950799][ T3356] __device_attach_driver+0x5b8/0x790 [ 85.956146][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 85.961058][ T3356] __device_attach+0x489/0x750 [ 85.965806][ T3356] device_initial_probe+0x4a/0x60 [ 85.970808][ T3356] bus_probe_device+0x131/0x390 [ 85.975733][ T3356] device_add+0x25b5/0x2df0 [ 85.980224][ T3356] usb_set_configuration+0x309f/0x3710 [ 85.985662][ T3356] generic_probe+0xe7/0x280 [ 85.990148][ T3356] usb_probe_device+0x146/0x200 [ 85.994988][ T3356] really_probe+0x1373/0x1dc0 [ 85.999729][ T3356] driver_probe_device+0x1ba/0x510 [ 86.005078][ T3356] __device_attach_driver+0x5b8/0x790 [ 86.010599][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 86.015428][ T3356] __device_attach+0x489/0x750 [ 86.020168][ T3356] device_initial_probe+0x4a/0x60 [ 86.025178][ T3356] bus_probe_device+0x131/0x390 [ 86.030013][ T3356] device_add+0x25b5/0x2df0 [ 86.034501][ T3356] usb_new_device+0x23e5/0x2fb0 [ 86.039337][ T3356] hub_event+0x581d/0x72f0 [ 86.043736][ T3356] process_one_work+0x1572/0x1ef0 [ 86.048739][ T3356] worker_thread+0x111b/0x2460 [ 86.053489][ T3356] kthread+0x4b5/0x4f0 [ 86.057554][ T3356] ret_from_fork+0x35/0x40 [ 86.061950][ T3356] [ 86.064272][ T3356] Local variable description: ----globalval.i@gtco_probe [ 86.071470][ T3356] Variable was created at: [ 86.075863][ T3356] gtco_probe+0xcd6/0x3520 [ 86.080258][ T3356] usb_probe_interface+0xd19/0x1310 [ 86.095237][ T3356] ================================================================== [ 86.104422][ T3356] Disabling lock debugging due to kernel taint [ 86.110636][ T3356] Kernel panic - not syncing: panic_on_warn set ... [ 86.117209][ T3356] CPU: 1 PID: 3356 Comm: kworker/1:2 Tainted: G B 5.3.0-rc7+ #0 [ 86.128145][ T3356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.156010][ T3356] Workqueue: usb_hub_wq hub_event [ 86.161030][ T3356] Call Trace: [ 86.164304][ T3356] dump_stack+0x191/0x1f0 [ 86.170021][ T3356] panic+0x3c9/0xc1e [ 86.174169][ T3356] kmsan_report+0x2ca/0x2d0 [ 86.178656][ T3356] __msan_warning+0x75/0xe0 [ 86.183329][ T3356] gtco_probe+0x18c7/0x3520 [ 86.187845][ T3356] ? store_tabletExecute+0x120/0x120 [ 86.193718][ T3356] ? store_tabletExecute+0x120/0x120 [ 86.199526][ T3356] ? store_tabletExecute+0x120/0x120 [ 86.206790][ T3356] usb_probe_interface+0xd19/0x1310 [ 86.211991][ T3356] ? usb_register_driver+0x7d0/0x7d0 [ 86.217257][ T3356] really_probe+0x1373/0x1dc0 [ 86.222268][ T3356] driver_probe_device+0x1ba/0x510 [ 86.227358][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 86.233245][ T3356] __device_attach_driver+0x5b8/0x790 [ 86.238955][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 86.243783][ T3356] ? deferred_probe_work_func+0x400/0x400 [ 86.249750][ T3356] __device_attach+0x489/0x750 [ 86.254509][ T3356] device_initial_probe+0x4a/0x60 [ 86.259598][ T3356] bus_probe_device+0x131/0x390 [ 86.267820][ T3356] device_add+0x25b5/0x2df0 [ 86.272318][ T3356] usb_set_configuration+0x309f/0x3710 [ 86.277795][ T3356] generic_probe+0xe7/0x280 [ 86.282726][ T3356] ? usb_choose_configuration+0xae0/0xae0 [ 86.288430][ T3356] usb_probe_device+0x146/0x200 [ 86.293267][ T3356] ? usb_register_device_driver+0x470/0x470 [ 86.299686][ T3356] really_probe+0x1373/0x1dc0 [ 86.304353][ T3356] driver_probe_device+0x1ba/0x510 [ 86.310075][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 86.316211][ T3356] __device_attach_driver+0x5b8/0x790 [ 86.321567][ T3356] bus_for_each_drv+0x28e/0x3b0 [ 86.326403][ T3356] ? deferred_probe_work_func+0x400/0x400 [ 86.332206][ T3356] __device_attach+0x489/0x750 [ 86.336969][ T3356] device_initial_probe+0x4a/0x60 [ 86.341973][ T3356] bus_probe_device+0x131/0x390 [ 86.346804][ T3356] device_add+0x25b5/0x2df0 [ 86.351384][ T3356] usb_new_device+0x23e5/0x2fb0 [ 86.356573][ T3356] hub_event+0x581d/0x72f0 [ 86.361082][ T3356] ? kmsan_get_shadow_origin_ptr+0x71/0x4c0 [ 86.367212][ T3356] ? led_work+0x720/0x720 [ 86.371530][ T3356] ? led_work+0x720/0x720 [ 86.375839][ T3356] process_one_work+0x1572/0x1ef0 [ 86.380946][ T3356] worker_thread+0x111b/0x2460 [ 86.385702][ T3356] kthread+0x4b5/0x4f0 [ 86.389751][ T3356] ? process_one_work+0x1ef0/0x1ef0 [ 86.394927][ T3356] ? kthread_blkcg+0xf0/0xf0 [ 86.399500][ T3356] ret_from_fork+0x35/0x40 [ 86.405075][ T3356] Kernel Offset: disabled [ 86.409396][ T3356] Rebooting in 86400 seconds..