[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.622639][ T30] audit: type=1800 audit(1559796721.671:25): pid=11655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.647270][ T30] audit: type=1800 audit(1559796721.691:26): pid=11655 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.682968][ T30] audit: type=1800 audit(1559796721.721:27): pid=11655 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 '10.128.0.118' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.862002][ T4943] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 96.221998][ T4943] usb 1-1: config 0 has an invalid interface number: 116 but max is 0 [ 96.230312][ T4943] usb 1-1: config 0 has no interface number 0 [ 96.312077][ T4943] usb 1-1: config 0 has an invalid interface number: 116 but max is 0 [ 96.320294][ T4943] usb 1-1: config 0 has no interface number 0 [ 96.326550][ T4943] usb 1-1: New USB device found, idVendor=13b1, idProduct=000d, bcdDevice=a5.43 [ 96.335673][ T4943] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 96.345139][ T4943] usb 1-1: config 0 descriptor?? executing program [ 96.531980][ T4943] usb 1-1: reset high-speed USB device number 2 using dummy_hcd [ 96.991902][ T4943] usb 1-1: device descriptor read/64, error -71 executing program [ 99.512048][ T4943] ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x09 failed for offset 0x0000 with error -71 [ 99.621997][ T4943] ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x04d0 with error -71 [ 99.633959][ T4943] ================================================================== [ 99.642048][ T4943] BUG: KMSAN: uninit-value in rt2500usb_bbp_read+0x174/0x640 [ 99.649588][ T4943] CPU: 1 PID: 4943 Comm: kworker/1:2 Not tainted 5.1.0+ #1 [ 99.656765][ T4943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.666816][ T4943] Workqueue: usb_hub_wq hub_event [ 99.671831][ T4943] Call Trace: [ 99.675124][ T4943] dump_stack+0x191/0x1f0 [ 99.679532][ T4943] kmsan_report+0x130/0x2a0 [ 99.684114][ T4943] __msan_warning+0x75/0xe0 [ 99.688647][ T4943] rt2500usb_bbp_read+0x174/0x640 [ 99.693709][ T4943] rt2500usb_probe_hw+0x3b1/0x2230 [ 99.698861][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 99.704754][ T4943] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 99.710130][ T4943] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 99.715567][ T4943] rt2x00lib_probe_dev+0xb81/0x3090 [ 99.720764][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 99.726651][ T4943] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 99.732807][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 99.738709][ T4943] rt2x00usb_probe+0x7c7/0xf70 [ 99.743568][ T4943] rt2500usb_probe+0x50/0x60 [ 99.748181][ T4943] ? rt2800_brightness_set+0xf20/0xf20 [ 99.753641][ T4943] usb_probe_interface+0xd66/0x1320 [ 99.758875][ T4943] ? usb_register_driver+0x7d0/0x7d0 [ 99.764173][ T4943] really_probe+0xdae/0x1d80 [ 99.768770][ T4943] driver_probe_device+0x1b3/0x4f0 [ 99.773886][ T4943] __device_attach_driver+0x5b8/0x790 [ 99.779261][ T4943] bus_for_each_drv+0x28e/0x3b0 [ 99.784102][ T4943] ? deferred_probe_work_func+0x400/0x400 [ 99.791538][ T4943] __device_attach+0x454/0x730 [ 99.796314][ T4943] device_initial_probe+0x4a/0x60 [ 99.801349][ T4943] bus_probe_device+0x137/0x390 [ 99.806207][ T4943] device_add+0x288d/0x30e0 [ 99.810736][ T4943] usb_set_configuration+0x30dc/0x3750 [ 99.816236][ T4943] generic_probe+0xe7/0x280 [ 99.820735][ T4943] ? usb_choose_configuration+0xae0/0xae0 [ 99.826453][ T4943] usb_probe_device+0x14c/0x200 [ 99.831319][ T4943] ? usb_register_device_driver+0x470/0x470 [ 99.837215][ T4943] really_probe+0xdae/0x1d80 [ 99.842083][ T4943] driver_probe_device+0x1b3/0x4f0 [ 99.847221][ T4943] __device_attach_driver+0x5b8/0x790 [ 99.852631][ T4943] bus_for_each_drv+0x28e/0x3b0 [ 99.857503][ T4943] ? deferred_probe_work_func+0x400/0x400 [ 99.863240][ T4943] __device_attach+0x454/0x730 [ 99.868004][ T4943] device_initial_probe+0x4a/0x60 [ 99.873032][ T4943] bus_probe_device+0x137/0x390 [ 99.877894][ T4943] device_add+0x288d/0x30e0 [ 99.882433][ T4943] usb_new_device+0x23e5/0x2ff0 [ 99.887304][ T4943] hub_event+0x48d1/0x7290 [ 99.891793][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 99.897689][ T4943] ? led_work+0x720/0x720 [ 99.902004][ T4943] ? led_work+0x720/0x720 [ 99.906334][ T4943] process_one_work+0x1572/0x1f00 [ 99.911372][ T4943] worker_thread+0x111b/0x2460 [ 99.916159][ T4943] kthread+0x4b5/0x4f0 [ 99.920231][ T4943] ? process_one_work+0x1f00/0x1f00 [ 99.925451][ T4943] ? kthread_blkcg+0xf0/0xf0 [ 99.930064][ T4943] ret_from_fork+0x35/0x40 [ 99.934494][ T4943] [ 99.936808][ T4943] Local variable description: ----reg.i.i@rt2500usb_bbp_read [ 99.944329][ T4943] Variable was created at: [ 99.948738][ T4943] rt2500usb_bbp_read+0xa4/0x640 [ 99.953663][ T4943] rt2500usb_probe_hw+0x3b1/0x2230 [ 99.958752][ T4943] ================================================================== [ 99.966791][ T4943] Disabling lock debugging due to kernel taint [ 99.972924][ T4943] Kernel panic - not syncing: panic_on_warn set ... [ 99.979501][ T4943] CPU: 1 PID: 4943 Comm: kworker/1:2 Tainted: G B 5.1.0+ #1 [ 99.988066][ T4943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.998117][ T4943] Workqueue: usb_hub_wq hub_event [ 100.003127][ T4943] Call Trace: [ 100.006429][ T4943] dump_stack+0x191/0x1f0 [ 100.010785][ T4943] panic+0x3ca/0xafe [ 100.014702][ T4943] kmsan_report+0x298/0x2a0 [ 100.019202][ T4943] __msan_warning+0x75/0xe0 [ 100.023705][ T4943] rt2500usb_bbp_read+0x174/0x640 [ 100.028749][ T4943] rt2500usb_probe_hw+0x3b1/0x2230 [ 100.033875][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.039755][ T4943] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 100.045114][ T4943] ? rt2500usb_queue_init+0x1e0/0x1e0 [ 100.050492][ T4943] rt2x00lib_probe_dev+0xb81/0x3090 [ 100.055715][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.061603][ T4943] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 100.067752][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.073645][ T4943] rt2x00usb_probe+0x7c7/0xf70 [ 100.078414][ T4943] rt2500usb_probe+0x50/0x60 [ 100.082993][ T4943] ? rt2800_brightness_set+0xf20/0xf20 [ 100.088449][ T4943] usb_probe_interface+0xd66/0x1320 [ 100.093650][ T4943] ? usb_register_driver+0x7d0/0x7d0 [ 100.098926][ T4943] really_probe+0xdae/0x1d80 [ 100.103534][ T4943] driver_probe_device+0x1b3/0x4f0 [ 100.108687][ T4943] __device_attach_driver+0x5b8/0x790 [ 100.114076][ T4943] bus_for_each_drv+0x28e/0x3b0 [ 100.118915][ T4943] ? deferred_probe_work_func+0x400/0x400 [ 100.124635][ T4943] __device_attach+0x454/0x730 [ 100.129396][ T4943] device_initial_probe+0x4a/0x60 [ 100.134411][ T4943] bus_probe_device+0x137/0x390 [ 100.139263][ T4943] device_add+0x288d/0x30e0 [ 100.143790][ T4943] usb_set_configuration+0x30dc/0x3750 [ 100.149302][ T4943] generic_probe+0xe7/0x280 [ 100.153803][ T4943] ? usb_choose_configuration+0xae0/0xae0 [ 100.159514][ T4943] usb_probe_device+0x14c/0x200 [ 100.164361][ T4943] ? usb_register_device_driver+0x470/0x470 [ 100.170246][ T4943] really_probe+0xdae/0x1d80 [ 100.174839][ T4943] driver_probe_device+0x1b3/0x4f0 [ 100.179949][ T4943] __device_attach_driver+0x5b8/0x790 [ 100.185323][ T4943] bus_for_each_drv+0x28e/0x3b0 [ 100.190161][ T4943] ? deferred_probe_work_func+0x400/0x400 [ 100.195879][ T4943] __device_attach+0x454/0x730 [ 100.200729][ T4943] device_initial_probe+0x4a/0x60 [ 100.205741][ T4943] bus_probe_device+0x137/0x390 [ 100.210592][ T4943] device_add+0x288d/0x30e0 [ 100.215114][ T4943] usb_new_device+0x23e5/0x2ff0 [ 100.219977][ T4943] hub_event+0x48d1/0x7290 [ 100.224450][ T4943] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.230328][ T4943] ? led_work+0x720/0x720 [ 100.234729][ T4943] ? led_work+0x720/0x720 [ 100.239061][ T4943] process_one_work+0x1572/0x1f00 [ 100.244100][ T4943] worker_thread+0x111b/0x2460 [ 100.248880][ T4943] kthread+0x4b5/0x4f0 [ 100.252938][ T4943] ? process_one_work+0x1f00/0x1f00 [ 100.258133][ T4943] ? kthread_blkcg+0xf0/0xf0 [ 100.262741][ T4943] ret_from_fork+0x35/0x40 [ 100.268399][ T4943] Kernel Offset: disabled [ 100.272731][ T4943] Rebooting in 86400 seconds..