[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 90.817882][ T31] audit: type=1800 audit(1571200550.869:25): pid=13178 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 90.847139][ T31] audit: type=1800 audit(1571200550.899:26): pid=13178 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 90.867439][ T31] audit: type=1800 audit(1571200550.899:27): pid=13178 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 '10.128.0.186' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.083013][T13330] IPVS: ftp: loaded support on port[0] = 21 [ 101.392217][ T3904] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 101.752258][ T3904] usb 1-1: config 0 has an invalid interface number: 22 but max is 0 [ 101.760718][ T3904] usb 1-1: config 0 has no interface number 0 [ 101.767121][ T3904] usb 1-1: New USB device found, idVendor=0ac8, idProduct=c301, bcdDevice=8b.4c [ 101.776286][ T3904] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 101.785916][ T3904] usb 1-1: config 0 descriptor?? [ 101.827038][ T3904] gspca_main: vc032x-2.14.0 probing 0ac8:c301 [ 102.042134][ T3904] gspca_vc032x: reg_w err -71 [ 102.046934][ T3904] ===================================================== [ 102.053865][ T3904] BUG: KMSAN: uninit-value in read_sensor_register+0x4b7/0xd30 [ 102.061388][ T3904] CPU: 1 PID: 3904 Comm: kworker/1:2 Not tainted 5.4.0-rc3+ #0 [ 102.069179][ T3904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.081813][ T3904] Workqueue: usb_hub_wq hub_event [ 102.086954][ T3904] Call Trace: [ 102.090261][ T3904] dump_stack+0x191/0x1f0 [ 102.094622][ T3904] kmsan_report+0x14a/0x2f0 [ 102.099120][ T3904] __msan_warning+0x73/0xf0 [ 102.103619][ T3904] read_sensor_register+0x4b7/0xd30 [ 102.108809][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.114778][ T3904] sd_init+0x2cf3/0x4530 [ 102.119043][ T3904] ? sd_config+0x270/0x270 [ 102.123718][ T3904] gspca_dev_probe2+0xe93/0x2230 [ 102.128654][ T3904] gspca_dev_probe+0x346/0x3b0 [ 102.133408][ T3904] sd_probe+0x8d/0xa0 [ 102.137458][ T3904] ? sd_s_ctrl+0xdd0/0xdd0 [ 102.141885][ T3904] usb_probe_interface+0xd19/0x1310 [ 102.147083][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.153397][ T3904] ? usb_register_driver+0x860/0x860 [ 102.158670][ T3904] really_probe+0xd91/0x1f90 [ 102.163337][ T3904] driver_probe_device+0x1ba/0x510 [ 102.168435][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.173807][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.178653][ T3904] ? deferred_probe_work_func+0x400/0x400 [ 102.184368][ T3904] __device_attach+0x489/0x750 [ 102.189182][ T3904] device_initial_probe+0x4a/0x60 [ 102.194192][ T3904] bus_probe_device+0x131/0x390 [ 102.199150][ T3904] device_add+0x25b5/0x2df0 [ 102.203662][ T3904] usb_set_configuration+0x309f/0x3710 [ 102.209143][ T3904] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 102.215211][ T3904] generic_probe+0xe7/0x280 [ 102.220656][ T3904] ? usb_choose_configuration+0xae0/0xae0 [ 102.226364][ T3904] usb_probe_device+0x146/0x200 [ 102.231209][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.237179][ T3904] ? usb_register_device_driver+0x500/0x500 [ 102.243059][ T3904] really_probe+0xd91/0x1f90 [ 102.247640][ T3904] driver_probe_device+0x1ba/0x510 [ 102.252828][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.258822][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.263722][ T3904] ? deferred_probe_work_func+0x400/0x400 [ 102.269659][ T3904] __device_attach+0x489/0x750 [ 102.274483][ T3904] device_initial_probe+0x4a/0x60 [ 102.279498][ T3904] bus_probe_device+0x131/0x390 [ 102.284699][ T3904] device_add+0x25b5/0x2df0 [ 102.289776][ T3904] usb_new_device+0x23e5/0x2fb0 [ 102.294659][ T3904] hub_event+0x581d/0x72f0 [ 102.299096][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.304979][ T3904] ? led_work+0x720/0x720 [ 102.309285][ T3904] ? led_work+0x720/0x720 [ 102.313596][ T3904] process_one_work+0x1572/0x1ef0 [ 102.318708][ T3904] worker_thread+0x111b/0x2460 [ 102.323465][ T3904] kthread+0x4b5/0x4f0 [ 102.327522][ T3904] ? process_one_work+0x1ef0/0x1ef0 [ 102.332758][ T3904] ? kthread_blkcg+0xf0/0xf0 [ 102.337343][ T3904] ret_from_fork+0x35/0x40 [ 102.341747][ T3904] [ 102.344063][ T3904] Uninit was created at: [ 102.348293][ T3904] kmsan_internal_poison_shadow+0x60/0x110 [ 102.354075][ T3904] kmsan_slab_alloc+0xaa/0x130 [ 102.358817][ T3904] kmem_cache_alloc_trace+0x8c5/0xd20 [ 102.364173][ T3904] gspca_dev_probe2+0x30d/0x2230 [ 102.369109][ T3904] gspca_dev_probe+0x346/0x3b0 [ 102.373850][ T3904] sd_probe+0x8d/0xa0 [ 102.377819][ T3904] usb_probe_interface+0xd19/0x1310 [ 102.382994][ T3904] really_probe+0xd91/0x1f90 [ 102.387559][ T3904] driver_probe_device+0x1ba/0x510 [ 102.392644][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.397991][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.402901][ T3904] __device_attach+0x489/0x750 [ 102.407641][ T3904] device_initial_probe+0x4a/0x60 [ 102.413859][ T3904] bus_probe_device+0x131/0x390 [ 102.418683][ T3904] device_add+0x25b5/0x2df0 [ 102.427361][ T3904] usb_set_configuration+0x309f/0x3710 [ 102.433244][ T3904] generic_probe+0xe7/0x280 [ 102.438010][ T3904] usb_probe_device+0x146/0x200 [ 102.442854][ T3904] really_probe+0xd91/0x1f90 [ 102.447425][ T3904] driver_probe_device+0x1ba/0x510 [ 102.452515][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.457876][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.462821][ T3904] __device_attach+0x489/0x750 [ 102.467578][ T3904] device_initial_probe+0x4a/0x60 [ 102.472583][ T3904] bus_probe_device+0x131/0x390 [ 102.477428][ T3904] device_add+0x25b5/0x2df0 [ 102.481915][ T3904] usb_new_device+0x23e5/0x2fb0 [ 102.486743][ T3904] hub_event+0x581d/0x72f0 [ 102.491153][ T3904] process_one_work+0x1572/0x1ef0 [ 102.496866][ T3904] worker_thread+0x111b/0x2460 [ 102.501615][ T3904] kthread+0x4b5/0x4f0 [ 102.505668][ T3904] ret_from_fork+0x35/0x40 [ 102.510059][ T3904] ===================================================== [ 102.517415][ T3904] Disabling lock debugging due to kernel taint [ 102.523567][ T3904] Kernel panic - not syncing: panic_on_warn set ... [ 102.530150][ T3904] CPU: 1 PID: 3904 Comm: kworker/1:2 Tainted: G B 5.4.0-rc3+ #0 [ 102.539087][ T3904] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.549218][ T3904] Workqueue: usb_hub_wq hub_event [ 102.554223][ T3904] Call Trace: [ 102.557498][ T3904] dump_stack+0x191/0x1f0 [ 102.561828][ T3904] panic+0x3c9/0xc1e [ 102.565729][ T3904] kmsan_report+0x2e8/0x2f0 [ 102.570231][ T3904] __msan_warning+0x73/0xf0 [ 102.574806][ T3904] read_sensor_register+0x4b7/0xd30 [ 102.580095][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.585985][ T3904] sd_init+0x2cf3/0x4530 [ 102.590227][ T3904] ? sd_config+0x270/0x270 [ 102.594632][ T3904] gspca_dev_probe2+0xe93/0x2230 [ 102.599578][ T3904] gspca_dev_probe+0x346/0x3b0 [ 102.604335][ T3904] sd_probe+0x8d/0xa0 [ 102.608382][ T3904] ? sd_s_ctrl+0xdd0/0xdd0 [ 102.612796][ T3904] usb_probe_interface+0xd19/0x1310 [ 102.617998][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.623884][ T3904] ? usb_register_driver+0x860/0x860 [ 102.629414][ T3904] really_probe+0xd91/0x1f90 [ 102.634010][ T3904] driver_probe_device+0x1ba/0x510 [ 102.639139][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.644505][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.649632][ T3904] ? deferred_probe_work_func+0x400/0x400 [ 102.655428][ T3904] __device_attach+0x489/0x750 [ 102.660192][ T3904] device_initial_probe+0x4a/0x60 [ 102.665200][ T3904] bus_probe_device+0x131/0x390 [ 102.670047][ T3904] device_add+0x25b5/0x2df0 [ 102.674562][ T3904] usb_set_configuration+0x309f/0x3710 [ 102.680102][ T3904] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 102.686174][ T3904] generic_probe+0xe7/0x280 [ 102.690669][ T3904] ? usb_choose_configuration+0xae0/0xae0 [ 102.696372][ T3904] usb_probe_device+0x146/0x200 [ 102.701205][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.707080][ T3904] ? usb_register_device_driver+0x500/0x500 [ 102.712959][ T3904] really_probe+0xd91/0x1f90 [ 102.717550][ T3904] driver_probe_device+0x1ba/0x510 [ 102.722643][ T3904] __device_attach_driver+0x5b8/0x790 [ 102.728034][ T3904] bus_for_each_drv+0x28e/0x3b0 [ 102.732877][ T3904] ? deferred_probe_work_func+0x400/0x400 [ 102.738685][ T3904] __device_attach+0x489/0x750 [ 102.743460][ T3904] device_initial_probe+0x4a/0x60 [ 102.748470][ T3904] bus_probe_device+0x131/0x390 [ 102.753307][ T3904] device_add+0x25b5/0x2df0 [ 102.757879][ T3904] usb_new_device+0x23e5/0x2fb0 [ 102.762747][ T3904] hub_event+0x581d/0x72f0 [ 102.767183][ T3904] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 102.773062][ T3904] ? led_work+0x720/0x720 [ 102.777392][ T3904] ? led_work+0x720/0x720 [ 102.781711][ T3904] process_one_work+0x1572/0x1ef0 [ 102.786739][ T3904] worker_thread+0x111b/0x2460 [ 102.791566][ T3904] kthread+0x4b5/0x4f0 [ 102.795658][ T3904] ? process_one_work+0x1ef0/0x1ef0 [ 102.800853][ T3904] ? kthread_blkcg+0xf0/0xf0 [ 102.805434][ T3904] ret_from_fork+0x35/0x40 [ 102.811298][ T3904] Kernel Offset: disabled [ 102.815639][ T3904] Rebooting in 86400 seconds..