[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.097252][ T32] audit: type=1800 audit(1571272897.154:25): pid=12266 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.120449][ T32] audit: type=1800 audit(1571272897.174:26): pid=12266 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.156220][ T32] audit: type=1800 audit(1571272897.204:27): pid=12266 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 '10.128.0.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 98.362244][ T2859] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 98.722215][ T2859] usb 1-1: config 1 has an invalid descriptor of length 0, skipping remainder of the config [ 98.732652][ T2859] usb 1-1: config 1 has 1 interface, different from the descriptor's value: 3 [ 98.902253][ T2859] usb 1-1: New USB device found, idVendor=1d6b, idProduct=0101, bcdDevice= 0.40 [ 98.911575][ T2859] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 98.919723][ T2859] usb 1-1: Product: syz [ 98.924051][ T2859] usb 1-1: Manufacturer: syz [ 98.928679][ T2859] usb 1-1: SerialNumber: syz [ 99.412341][ T2859] usb 1-1: 0:2 : does not exist executing program [ 100.452275][ T2859] ===================================================== [ 100.459742][ T2859] BUG: KMSAN: uninit-value in get_min_max_with_quirks+0xd6f/0x2ea0 [ 100.467634][ T2859] CPU: 0 PID: 2859 Comm: kworker/0:2 Not tainted 5.4.0-rc3+ #0 [ 100.475168][ T2859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.485230][ T2859] Workqueue: usb_hub_wq hub_event [ 100.490250][ T2859] Call Trace: [ 100.493617][ T2859] dump_stack+0x191/0x1f0 [ 100.498056][ T2859] kmsan_report+0x14a/0x2f0 [ 100.502656][ T2859] __msan_warning+0x73/0xf0 [ 100.507259][ T2859] get_min_max_with_quirks+0xd6f/0x2ea0 [ 100.512821][ T2859] ? kmsan_memcpy_memmove_metadata+0x109/0x2e0 [ 100.518994][ T2859] __build_feature_ctl+0x12b9/0x29e0 [ 100.524271][ T2859] ? parse_term_proc_unit+0x6ea/0x7e0 [ 100.529692][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.535700][ T2859] parse_audio_unit+0x218c/0x7490 [ 100.540749][ T2859] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.546817][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.552720][ T2859] snd_usb_create_mixer+0x1d7c/0x4070 [ 100.558316][ T2859] usb_audio_probe+0x286b/0x3eb0 [ 100.563283][ T2859] ? snd_usb_autosuspend+0x110/0x110 [ 100.568860][ T2859] usb_probe_interface+0xd19/0x1310 [ 100.574247][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.580179][ T2859] ? usb_register_driver+0x860/0x860 [ 100.585465][ T2859] really_probe+0xd91/0x1f90 [ 100.590055][ T2859] driver_probe_device+0x1ba/0x510 [ 100.595165][ T2859] __device_attach_driver+0x5b8/0x790 [ 100.600669][ T2859] bus_for_each_drv+0x28e/0x3b0 [ 100.605531][ T2859] ? deferred_probe_work_func+0x400/0x400 [ 100.611247][ T2859] __device_attach+0x489/0x750 [ 100.616015][ T2859] device_initial_probe+0x4a/0x60 [ 100.621119][ T2859] bus_probe_device+0x131/0x390 [ 100.625959][ T2859] device_add+0x25b5/0x2df0 [ 100.630467][ T2859] usb_set_configuration+0x309f/0x3710 [ 100.635931][ T2859] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 100.642103][ T2859] generic_probe+0xe7/0x280 [ 100.646608][ T2859] ? usb_choose_configuration+0xae0/0xae0 [ 100.652346][ T2859] usb_probe_device+0x146/0x200 [ 100.657203][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.663210][ T2859] ? usb_register_device_driver+0x500/0x500 [ 100.669091][ T2859] really_probe+0xd91/0x1f90 [ 100.673688][ T2859] driver_probe_device+0x1ba/0x510 [ 100.678815][ T2859] __device_attach_driver+0x5b8/0x790 [ 100.684394][ T2859] bus_for_each_drv+0x28e/0x3b0 [ 100.689239][ T2859] ? deferred_probe_work_func+0x400/0x400 [ 100.695253][ T2859] __device_attach+0x489/0x750 [ 100.700020][ T2859] device_initial_probe+0x4a/0x60 [ 100.705041][ T2859] bus_probe_device+0x131/0x390 [ 100.709908][ T2859] device_add+0x25b5/0x2df0 [ 100.714523][ T2859] usb_new_device+0x23e5/0x2fb0 [ 100.719398][ T2859] hub_event+0x581d/0x72f0 [ 100.723934][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.729819][ T2859] ? led_work+0x720/0x720 [ 100.734269][ T2859] ? led_work+0x720/0x720 [ 100.738589][ T2859] process_one_work+0x1572/0x1ef0 [ 100.743613][ T2859] worker_thread+0x111b/0x2460 [ 100.748480][ T2859] kthread+0x4b5/0x4f0 [ 100.752558][ T2859] ? process_one_work+0x1ef0/0x1ef0 [ 100.757746][ T2859] ? kthread_blkcg+0xf0/0xf0 [ 100.762339][ T2859] ret_from_fork+0x35/0x40 [ 100.766862][ T2859] [ 100.769176][ T2859] Local variable description: ----saved@get_min_max_with_quirks [ 100.776796][ T2859] Variable was created at: [ 100.781297][ T2859] get_min_max_with_quirks+0xa8b/0x2ea0 [ 100.786842][ T2859] get_min_max_with_quirks+0xa8b/0x2ea0 [ 100.792366][ T2859] ===================================================== [ 100.799280][ T2859] Disabling lock debugging due to kernel taint [ 100.805427][ T2859] Kernel panic - not syncing: panic_on_warn set ... [ 100.812006][ T2859] CPU: 0 PID: 2859 Comm: kworker/0:2 Tainted: G B 5.4.0-rc3+ #0 [ 100.820927][ T2859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.831012][ T2859] Workqueue: usb_hub_wq hub_event [ 100.836043][ T2859] Call Trace: [ 100.839362][ T2859] dump_stack+0x191/0x1f0 [ 100.844053][ T2859] panic+0x3c9/0xc1e [ 100.848054][ T2859] kmsan_report+0x2e8/0x2f0 [ 100.852562][ T2859] __msan_warning+0x73/0xf0 [ 100.857074][ T2859] get_min_max_with_quirks+0xd6f/0x2ea0 [ 100.862728][ T2859] ? kmsan_memcpy_memmove_metadata+0x109/0x2e0 [ 100.869046][ T2859] __build_feature_ctl+0x12b9/0x29e0 [ 100.874329][ T2859] ? parse_term_proc_unit+0x6ea/0x7e0 [ 100.879708][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.885608][ T2859] parse_audio_unit+0x218c/0x7490 [ 100.890676][ T2859] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 100.896779][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.902687][ T2859] snd_usb_create_mixer+0x1d7c/0x4070 [ 100.908219][ T2859] usb_audio_probe+0x286b/0x3eb0 [ 100.913193][ T2859] ? snd_usb_autosuspend+0x110/0x110 [ 100.918527][ T2859] usb_probe_interface+0xd19/0x1310 [ 100.923746][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 100.929636][ T2859] ? usb_register_driver+0x860/0x860 [ 100.934999][ T2859] really_probe+0xd91/0x1f90 [ 100.939610][ T2859] driver_probe_device+0x1ba/0x510 [ 100.944728][ T2859] __device_attach_driver+0x5b8/0x790 [ 100.950135][ T2859] bus_for_each_drv+0x28e/0x3b0 [ 100.955113][ T2859] ? deferred_probe_work_func+0x400/0x400 [ 100.960863][ T2859] __device_attach+0x489/0x750 [ 100.965642][ T2859] device_initial_probe+0x4a/0x60 [ 100.970660][ T2859] bus_probe_device+0x131/0x390 [ 100.975507][ T2859] device_add+0x25b5/0x2df0 [ 100.980016][ T2859] usb_set_configuration+0x309f/0x3710 [ 100.985479][ T2859] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 100.991546][ T2859] generic_probe+0xe7/0x280 [ 100.996048][ T2859] ? usb_choose_configuration+0xae0/0xae0 [ 101.001869][ T2859] usb_probe_device+0x146/0x200 [ 101.006718][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 101.012611][ T2859] ? usb_register_device_driver+0x500/0x500 [ 101.018496][ T2859] really_probe+0xd91/0x1f90 [ 101.023082][ T2859] driver_probe_device+0x1ba/0x510 [ 101.028186][ T2859] __device_attach_driver+0x5b8/0x790 [ 101.033566][ T2859] bus_for_each_drv+0x28e/0x3b0 [ 101.038417][ T2859] ? deferred_probe_work_func+0x400/0x400 [ 101.044150][ T2859] __device_attach+0x489/0x750 [ 101.048912][ T2859] device_initial_probe+0x4a/0x60 [ 101.054041][ T2859] bus_probe_device+0x131/0x390 [ 101.058885][ T2859] device_add+0x25b5/0x2df0 [ 101.063474][ T2859] usb_new_device+0x23e5/0x2fb0 [ 101.068338][ T2859] hub_event+0x581d/0x72f0 [ 101.072783][ T2859] ? kmsan_get_shadow_origin_ptr+0x91/0x4b0 [ 101.078664][ T2859] ? led_work+0x720/0x720 [ 101.082977][ T2859] ? led_work+0x720/0x720 [ 101.087294][ T2859] process_one_work+0x1572/0x1ef0 [ 101.092326][ T2859] worker_thread+0x111b/0x2460 [ 101.097088][ T2859] kthread+0x4b5/0x4f0 [ 101.101166][ T2859] ? process_one_work+0x1ef0/0x1ef0 [ 101.106500][ T2859] ? kthread_blkcg+0xf0/0xf0 [ 101.111102][ T2859] ret_from_fork+0x35/0x40 [ 101.117234][ T2859] Kernel Offset: disabled [ 101.121597][ T2859] Rebooting in 86400 seconds..