[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 102.246044][ T31] audit: type=1800 audit(1562061166.291:25): pid=12592 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 102.282426][ T31] audit: type=1800 audit(1562061166.311:26): pid=12592 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 102.302933][ T31] audit: type=1800 audit(1562061166.331:27): pid=12592 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 '10.128.0.234' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 112.672829][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 112.912348][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 113.032355][ T12] usb 1-1: config 0 has an invalid interface number: 239 but max is 0 [ 113.040811][ T12] usb 1-1: config 0 has no interface number 0 [ 113.047176][ T12] usb 1-1: New USB device found, idVendor=0b95, idProduct=178a, bcdDevice=2b.fa [ 113.056370][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 113.066436][ T12] usb 1-1: config 0 descriptor?? executing program [ 113.382529][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.532510][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x0006: -71 [ 113.562436][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0005: -71 [ 113.592433][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.622398][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.652462][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.682361][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.712501][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 113.742421][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.772517][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 113.802467][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x0001: -71 [ 113.832406][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 113.862516][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x001f: -71 [ 113.892363][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x0019: -71 [ 113.922411][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x001f: -71 [ 113.952503][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 113.982421][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 114.012524][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 114.042340][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x000e: -71 [ 114.079692][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 114.102366][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 114.132484][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 114.162330][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 114.192467][ T12] ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71 [ 114.203526][ T12] ================================================================== [ 114.211752][ T12] BUG: KMSAN: uninit-value in mii_nway_restart+0x141/0x260 [ 114.220020][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc4+ #7 [ 114.228960][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.242469][ T12] Workqueue: usb_hub_wq hub_event [ 114.247519][ T12] Call Trace: [ 114.251797][ T12] dump_stack+0x191/0x1f0 [ 114.256810][ T12] kmsan_report+0x162/0x2d0 [ 114.261965][ T12] __msan_warning+0x75/0xe0 [ 114.269483][ T12] mii_nway_restart+0x141/0x260 [ 114.278249][ T12] ? btrfs_balance+0x7101/0x8620 [ 114.284017][ T12] ax88179_bind+0xee3/0x1a10 [ 114.289311][ T12] ? ax88179_resume+0x10f0/0x10f0 [ 114.294696][ T12] usbnet_probe+0x10d3/0x3950 [ 114.299899][ T12] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 114.306908][ T12] ? usbnet_disconnect+0x660/0x660 [ 114.313266][ T12] usb_probe_interface+0xd19/0x1310 [ 114.319951][ T12] ? usb_register_driver+0x7d0/0x7d0 [ 114.326932][ T12] really_probe+0x1344/0x1d90 [ 114.331819][ T12] driver_probe_device+0x1ba/0x510 [ 114.337406][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.343630][ T12] __device_attach_driver+0x5b8/0x790 [ 114.349391][ T12] bus_for_each_drv+0x28e/0x3b0 [ 114.355143][ T12] ? deferred_probe_work_func+0x400/0x400 [ 114.361229][ T12] __device_attach+0x489/0x750 [ 114.366086][ T12] device_initial_probe+0x4a/0x60 [ 114.373111][ T12] bus_probe_device+0x131/0x390 [ 114.378758][ T12] device_add+0x25b5/0x2df0 [ 114.384770][ T12] usb_set_configuration+0x309f/0x3710 [ 114.390739][ T12] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 114.399581][ T12] generic_probe+0xe7/0x280 [ 114.404587][ T12] ? usb_choose_configuration+0xae0/0xae0 [ 114.411519][ T12] usb_probe_device+0x146/0x200 [ 114.416554][ T12] ? usb_register_device_driver+0x470/0x470 [ 114.422795][ T12] really_probe+0x1344/0x1d90 [ 114.428172][ T12] driver_probe_device+0x1ba/0x510 [ 114.434216][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.441429][ T12] __device_attach_driver+0x5b8/0x790 [ 114.447137][ T12] bus_for_each_drv+0x28e/0x3b0 [ 114.452490][ T12] ? deferred_probe_work_func+0x400/0x400 [ 114.460402][ T12] __device_attach+0x489/0x750 [ 114.465392][ T12] device_initial_probe+0x4a/0x60 [ 114.470721][ T12] bus_probe_device+0x131/0x390 [ 114.475636][ T12] device_add+0x25b5/0x2df0 [ 114.480210][ T12] usb_new_device+0x23e5/0x2fb0 [ 114.485149][ T12] hub_event+0x5853/0x7320 [ 114.489670][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.495578][ T12] ? led_work+0x720/0x720 [ 114.499997][ T12] ? led_work+0x720/0x720 [ 114.504677][ T12] process_one_work+0x1572/0x1f00 [ 114.509722][ T12] worker_thread+0x111b/0x2460 [ 114.514596][ T12] kthread+0x4b5/0x4f0 [ 114.518660][ T12] ? process_one_work+0x1f00/0x1f00 [ 114.523878][ T12] ? kthread_blkcg+0xf0/0xf0 [ 114.528550][ T12] ret_from_fork+0x35/0x40 [ 114.532973][ T12] [ 114.535298][ T12] Local variable description: ----buf.i@ax88179_mdio_read [ 114.542405][ T12] Variable was created at: [ 114.546910][ T12] ax88179_mdio_read+0x7b/0x240 [ 114.551755][ T12] mii_nway_restart+0xcf/0x260 [ 114.556499][ T12] ================================================================== [ 114.564567][ T12] Disabling lock debugging due to kernel taint [ 114.570787][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 114.578237][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.2.0-rc4+ #7 [ 114.588448][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.601399][ T12] Workqueue: usb_hub_wq hub_event [ 114.607870][ T12] Call Trace: [ 114.611255][ T12] dump_stack+0x191/0x1f0 [ 114.617065][ T12] panic+0x3c9/0xc1e [ 114.621596][ T12] kmsan_report+0x2ca/0x2d0 [ 114.626663][ T12] __msan_warning+0x75/0xe0 [ 114.631336][ T12] mii_nway_restart+0x141/0x260 [ 114.637290][ T12] ? btrfs_balance+0x7101/0x8620 [ 114.644074][ T12] ax88179_bind+0xee3/0x1a10 [ 114.651007][ T12] ? ax88179_resume+0x10f0/0x10f0 [ 114.661797][ T12] usbnet_probe+0x10d3/0x3950 [ 114.672979][ T12] ? kmsan_internal_memset_shadow+0x104/0x3a0 [ 114.697156][ T12] ? usbnet_disconnect+0x660/0x660 [ 114.707299][ T12] usb_probe_interface+0xd19/0x1310 [ 114.715330][ T12] ? usb_register_driver+0x7d0/0x7d0 [ 114.720625][ T12] really_probe+0x1344/0x1d90 [ 114.725317][ T12] driver_probe_device+0x1ba/0x510 [ 114.730450][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.736359][ T12] __device_attach_driver+0x5b8/0x790 [ 114.741859][ T12] bus_for_each_drv+0x28e/0x3b0 [ 114.746709][ T12] ? deferred_probe_work_func+0x400/0x400 [ 114.752439][ T12] __device_attach+0x489/0x750 [ 114.757210][ T12] device_initial_probe+0x4a/0x60 [ 114.762236][ T12] bus_probe_device+0x131/0x390 [ 114.767094][ T12] device_add+0x25b5/0x2df0 [ 114.771656][ T12] usb_set_configuration+0x309f/0x3710 [ 114.777172][ T12] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 114.783271][ T12] generic_probe+0xe7/0x280 [ 114.787799][ T12] ? usb_choose_configuration+0xae0/0xae0 [ 114.793616][ T12] usb_probe_device+0x146/0x200 [ 114.798491][ T12] ? usb_register_device_driver+0x470/0x470 [ 114.804416][ T12] really_probe+0x1344/0x1d90 [ 114.809111][ T12] driver_probe_device+0x1ba/0x510 [ 114.814364][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.820271][ T12] __device_attach_driver+0x5b8/0x790 [ 114.825690][ T12] bus_for_each_drv+0x28e/0x3b0 [ 114.830641][ T12] ? deferred_probe_work_func+0x400/0x400 [ 114.836425][ T12] __device_attach+0x489/0x750 [ 114.841213][ T12] device_initial_probe+0x4a/0x60 [ 114.846233][ T12] bus_probe_device+0x131/0x390 [ 114.851088][ T12] device_add+0x25b5/0x2df0 [ 114.855625][ T12] usb_new_device+0x23e5/0x2fb0 [ 114.860529][ T12] hub_event+0x5853/0x7320 [ 114.865354][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 114.871364][ T12] ? led_work+0x720/0x720 [ 114.875688][ T12] ? led_work+0x720/0x720 [ 114.880014][ T12] process_one_work+0x1572/0x1f00 [ 114.885078][ T12] worker_thread+0x111b/0x2460 [ 114.890069][ T12] kthread+0x4b5/0x4f0 [ 114.894217][ T12] ? process_one_work+0x1f00/0x1f00 [ 114.914003][ T12] ? kthread_blkcg+0xf0/0xf0 [ 114.920862][ T12] ret_from_fork+0x35/0x40 [ 114.926401][ T12] Kernel Offset: disabled [ 114.930754][ T12] Rebooting in 86400 seconds..