[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.866422][ T31] audit: type=1800 audit(1568038553.913:25): pid=11551 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.889598][ T31] audit: type=1800 audit(1568038553.943:26): pid=11551 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.925574][ T31] audit: type=1800 audit(1568038553.963:27): pid=11551 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 '10.128.10.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.772242][ T4893] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 89.012175][ T4893] usb 1-1: Using ep0 maxpacket: 8 [ 89.132400][ T4893] usb 1-1: config 0 has an invalid interface number: 186 but max is 0 [ 89.140694][ T4893] usb 1-1: config 0 has no interface number 0 [ 89.146946][ T4893] usb 1-1: config 0 interface 186 altsetting 0 bulk endpoint 0xB has invalid maxpacket 0 [ 89.156894][ T4893] usb 1-1: config 0 interface 186 altsetting 0 bulk endpoint 0x8A has invalid maxpacket 0 [ 89.167109][ T4893] usb 1-1: New USB device found, idVendor=0424, idProduct=7500, bcdDevice=82.12 [ 89.176284][ T4893] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 89.185782][ T4893] usb 1-1: config 0 descriptor?? [ 89.224008][ T4893] smsc75xx v1.0.0 [ 89.662391][ T4893] ================================================================== [ 89.671430][ T4893] BUG: KMSAN: uninit-value in smsc75xx_bind+0x541/0x12d0 [ 89.678437][ T4893] CPU: 1 PID: 4893 Comm: kworker/1:2 Not tainted 5.3.0-rc7+ #0 [ 89.685954][ T4893] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.696003][ T4893] Workqueue: usb_hub_wq hub_event [ 89.701112][ T4893] Call Trace: [ 89.704392][ T4893] dump_stack+0x191/0x1f0 [ 89.708704][ T4893] kmsan_report+0x162/0x2d0 [ 89.713187][ T4893] __msan_warning+0x75/0xe0 [ 89.717673][ T4893] smsc75xx_bind+0x541/0x12d0 [ 89.722352][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 89.728325][ T4893] ? smsc75xx_write_wuff+0x9e0/0x9e0 [ 89.733586][ T4893] usbnet_probe+0x10ae/0x3960 [ 89.738262][ T4893] ? usbnet_disconnect+0x660/0x660 [ 89.743357][ T4893] usb_probe_interface+0xd19/0x1310 [ 89.748538][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 89.754497][ T4893] ? usb_register_driver+0x7d0/0x7d0 [ 89.759766][ T4893] really_probe+0x1373/0x1dc0 [ 89.764430][ T4893] driver_probe_device+0x1ba/0x510 [ 89.769525][ T4893] __device_attach_driver+0x5b8/0x790 [ 89.774880][ T4893] ? bus_for_each_drv+0x1d5/0x3b0 [ 89.779885][ T4893] bus_for_each_drv+0x28e/0x3b0 [ 89.784716][ T4893] ? deferred_probe_work_func+0x400/0x400 [ 89.790418][ T4893] __device_attach+0x489/0x750 [ 89.795167][ T4893] device_initial_probe+0x4a/0x60 [ 89.800172][ T4893] bus_probe_device+0x131/0x390 [ 89.805006][ T4893] device_add+0x25b5/0x2df0 [ 89.809497][ T4893] ? usb_set_configuration+0x3036/0x3710 [ 89.815109][ T4893] usb_set_configuration+0x309f/0x3710 [ 89.820577][ T4893] generic_probe+0xe7/0x280 [ 89.825062][ T4893] ? usb_probe_device+0x104/0x200 [ 89.830066][ T4893] ? usb_choose_configuration+0xae0/0xae0 [ 89.835769][ T4893] usb_probe_device+0x146/0x200 [ 89.840597][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 89.846557][ T4893] ? usb_register_device_driver+0x470/0x470 [ 89.852432][ T4893] really_probe+0x1373/0x1dc0 [ 89.857110][ T4893] driver_probe_device+0x1ba/0x510 [ 89.862226][ T4893] __device_attach_driver+0x5b8/0x790 [ 89.867581][ T4893] ? bus_for_each_drv+0x1d5/0x3b0 [ 89.872587][ T4893] bus_for_each_drv+0x28e/0x3b0 [ 89.877438][ T4893] ? deferred_probe_work_func+0x400/0x400 [ 89.883139][ T4893] __device_attach+0x489/0x750 [ 89.887890][ T4893] device_initial_probe+0x4a/0x60 [ 89.892894][ T4893] bus_probe_device+0x131/0x390 [ 89.897750][ T4893] device_add+0x25b5/0x2df0 [ 89.902243][ T4893] usb_new_device+0x23e5/0x2fb0 [ 89.907084][ T4893] hub_event+0x581d/0x72f0 [ 89.911507][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 89.917467][ T4893] ? led_work+0x720/0x720 [ 89.921846][ T4893] ? led_work+0x720/0x720 [ 89.926175][ T4893] process_one_work+0x1572/0x1ef0 [ 89.931200][ T4893] worker_thread+0x111b/0x2460 [ 89.935964][ T4893] kthread+0x4b5/0x4f0 [ 89.940016][ T4893] ? process_one_work+0x1ef0/0x1ef0 [ 89.945218][ T4893] ? kthread_blkcg+0xf0/0xf0 [ 89.949856][ T4893] ret_from_fork+0x35/0x40 [ 89.954265][ T4893] [ 89.956579][ T4893] Local variable description: ----buf.i93@smsc75xx_bind [ 89.963490][ T4893] Variable was created at: [ 89.967899][ T4893] smsc75xx_bind+0x44c/0x12d0 [ 89.972559][ T4893] usbnet_probe+0x10ae/0x3960 [ 89.977211][ T4893] ================================================================== [ 89.985249][ T4893] Disabling lock debugging due to kernel taint [ 89.991379][ T4893] Kernel panic - not syncing: panic_on_warn set ... [ 89.997947][ T4893] CPU: 1 PID: 4893 Comm: kworker/1:2 Tainted: G B 5.3.0-rc7+ #0 [ 90.006854][ T4893] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.016942][ T4893] Workqueue: usb_hub_wq hub_event [ 90.021943][ T4893] Call Trace: [ 90.025219][ T4893] dump_stack+0x191/0x1f0 [ 90.029535][ T4893] panic+0x3c9/0xc1e [ 90.033424][ T4893] kmsan_report+0x2ca/0x2d0 [ 90.037925][ T4893] __msan_warning+0x75/0xe0 [ 90.042416][ T4893] smsc75xx_bind+0x541/0x12d0 [ 90.047075][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 90.053050][ T4893] ? smsc75xx_write_wuff+0x9e0/0x9e0 [ 90.058332][ T4893] usbnet_probe+0x10ae/0x3960 [ 90.063002][ T4893] ? usbnet_disconnect+0x660/0x660 [ 90.068097][ T4893] usb_probe_interface+0xd19/0x1310 [ 90.073288][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 90.079250][ T4893] ? usb_register_driver+0x7d0/0x7d0 [ 90.084525][ T4893] really_probe+0x1373/0x1dc0 [ 90.089189][ T4893] driver_probe_device+0x1ba/0x510 [ 90.094286][ T4893] __device_attach_driver+0x5b8/0x790 [ 90.099643][ T4893] ? bus_for_each_drv+0x1d5/0x3b0 [ 90.104648][ T4893] bus_for_each_drv+0x28e/0x3b0 [ 90.109476][ T4893] ? deferred_probe_work_func+0x400/0x400 [ 90.115198][ T4893] __device_attach+0x489/0x750 [ 90.120003][ T4893] device_initial_probe+0x4a/0x60 [ 90.125014][ T4893] bus_probe_device+0x131/0x390 [ 90.129856][ T4893] device_add+0x25b5/0x2df0 [ 90.134366][ T4893] ? usb_set_configuration+0x3036/0x3710 [ 90.139987][ T4893] usb_set_configuration+0x309f/0x3710 [ 90.145463][ T4893] generic_probe+0xe7/0x280 [ 90.149953][ T4893] ? usb_probe_device+0x104/0x200 [ 90.154959][ T4893] ? usb_choose_configuration+0xae0/0xae0 [ 90.160655][ T4893] usb_probe_device+0x146/0x200 [ 90.165537][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 90.171497][ T4893] ? usb_register_device_driver+0x470/0x470 [ 90.177371][ T4893] really_probe+0x1373/0x1dc0 [ 90.182043][ T4893] driver_probe_device+0x1ba/0x510 [ 90.187138][ T4893] __device_attach_driver+0x5b8/0x790 [ 90.192492][ T4893] ? bus_for_each_drv+0x1d5/0x3b0 [ 90.197495][ T4893] bus_for_each_drv+0x28e/0x3b0 [ 90.202325][ T4893] ? deferred_probe_work_func+0x400/0x400 [ 90.208040][ T4893] __device_attach+0x489/0x750 [ 90.212793][ T4893] device_initial_probe+0x4a/0x60 [ 90.217798][ T4893] bus_probe_device+0x131/0x390 [ 90.222639][ T4893] device_add+0x25b5/0x2df0 [ 90.227135][ T4893] usb_new_device+0x23e5/0x2fb0 [ 90.232005][ T4893] hub_event+0x581d/0x72f0 [ 90.236441][ T4893] ? kmsan_get_shadow_origin_ptr+0x28c/0x3a0 [ 90.242399][ T4893] ? led_work+0x720/0x720 [ 90.246704][ T4893] ? led_work+0x720/0x720 [ 90.251024][ T4893] process_one_work+0x1572/0x1ef0 [ 90.256226][ T4893] worker_thread+0x111b/0x2460 [ 90.260997][ T4893] kthread+0x4b5/0x4f0 [ 90.265043][ T4893] ? process_one_work+0x1ef0/0x1ef0 [ 90.270221][ T4893] ? kthread_blkcg+0xf0/0xf0 [ 90.274795][ T4893] ret_from_fork+0x35/0x40 [ 90.280777][ T4893] Kernel Offset: disabled [ 90.285103][ T4893] Rebooting in 86400 seconds..