[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.156' (ECDSA) to the list of known hosts. syzkaller login: [ 132.932578][ T1082] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 133.172568][ T1082] usb 1-1: Using ep0 maxpacket: 8 [ 133.292753][ T1082] usb 1-1: New USB device found, idVendor=13d3, idProduct=3333, bcdDevice=6e.21 [ 133.301855][ T1082] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 133.313225][ T1082] usb 1-1: config 0 descriptor?? [ 133.359564][ T1082] usbhid 1-1:0.0: couldn't find an input interrupt endpoint [ 133.367819][ T1082] r8712u: register rtl8712_netdev_ops to netdev_ops [ 133.374880][ T1082] usb 1-1: r8712u: USB_SPEED_HIGH with 0 endpoints [ 133.482919][ T1082] ===================================================== [ 133.489931][ T1082] BUG: KMSAN: uninit-value in string+0x4fd/0x700 [ 133.496267][ T1082] string+0x4fd/0x700 [ 133.500256][ T1082] vsnprintf+0x224f/0x36a0 [ 133.504682][ T1082] pointer+0x184c/0x2060 [ 133.508936][ T1082] vsnprintf+0x1aaf/0x36a0 [ 133.513361][ T1082] vprintk_store+0x4c4/0x20d0 [ 133.518051][ T1082] vprintk_emit+0x25c/0x860 [ 133.522560][ T1082] dev_vprintk_emit+0x5f5/0x6d6 [ 133.527412][ T1082] dev_printk_emit+0x1d8/0x21a [ 133.532181][ T1082] __dev_printk+0x3de/0x460 [ 133.536692][ T1082] _dev_info+0x1e5/0x22a [ 133.540940][ T1082] r871xu_drv_init+0x1972/0x3090 [ 133.545886][ T1082] usb_probe_interface+0xf15/0x1530 [ 133.551102][ T1082] really_probe+0x66e/0x1510 [ 133.555708][ T1082] __driver_probe_device+0x3e9/0x530 [ 133.561009][ T1082] __device_attach_driver+0x79f/0x1120 [ 133.566485][ T1082] bus_for_each_drv+0x2f0/0x410 [ 133.571349][ T1082] __device_attach+0x593/0x8e0 [ 133.576127][ T1082] device_initial_probe+0x4a/0x60 [ 133.581174][ T1082] bus_probe_device+0x17b/0x3e0 [ 133.586031][ T1082] device_add+0x1d46/0x2400 [ 133.590516][ T1082] usb_set_configuration+0x389f/0x3ee0 [ 133.595980][ T1082] usb_generic_driver_probe+0x13c/0x300 [ 133.601508][ T1082] usb_probe_device+0x309/0x570 [ 133.606343][ T1082] really_probe+0x66e/0x1510 [ 133.610929][ T1082] __driver_probe_device+0x3e9/0x530 [ 133.616236][ T1082] __device_attach_driver+0x79f/0x1120 [ 133.621682][ T1082] bus_for_each_drv+0x2f0/0x410 [ 133.626516][ T1082] __device_attach+0x593/0x8e0 [ 133.631263][ T1082] device_initial_probe+0x4a/0x60 [ 133.636273][ T1082] bus_probe_device+0x17b/0x3e0 [ 133.641105][ T1082] device_add+0x1d46/0x2400 [ 133.645587][ T1082] usb_new_device+0x1b9a/0x2960 [ 133.650418][ T1082] hub_event+0x57cf/0x8690 [ 133.654814][ T1082] process_one_work+0xdc7/0x1760 [ 133.659736][ T1082] worker_thread+0x1101/0x22b0 [ 133.664482][ T1082] kthread+0x66b/0x780 [ 133.668528][ T1082] ret_from_fork+0x1f/0x30 [ 133.672926][ T1082] [ 133.675238][ T1082] Local variable ----data@usb_read8 created at: [ 133.681451][ T1082] usb_read8+0x5d/0x130 [ 133.685589][ T1082] r8712_read8+0xa5/0xd0 [ 133.689810][ T1082] ===================================================== [ 133.696725][ T1082] Disabling lock debugging due to kernel taint [ 133.702848][ T1082] Kernel panic - not syncing: panic_on_kmsan set ... [ 133.709492][ T1082] CPU: 0 PID: 1082 Comm: kworker/0:2 Tainted: G B 5.15.0-rc2-syzkaller #0 [ 133.719273][ T1082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 133.729308][ T1082] Workqueue: usb_hub_wq hub_event [ 133.734317][ T1082] Call Trace: [ 133.737577][ T1082] dump_stack_lvl+0x1ff/0x28e [ 133.742237][ T1082] dump_stack+0x25/0x28 [ 133.746372][ T1082] panic+0x44f/0xdeb [ 133.750251][ T1082] ? add_taint+0x187/0x210 [ 133.754652][ T1082] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 133.760809][ T1082] kmsan_report+0x2ee/0x300 [ 133.765292][ T1082] ? __msan_warning+0xa9/0xf0 [ 133.769962][ T1082] ? string+0x4fd/0x700 [ 133.774096][ T1082] ? vsnprintf+0x224f/0x36a0 [ 133.778666][ T1082] ? pointer+0x184c/0x2060 [ 133.783080][ T1082] ? vsnprintf+0x1aaf/0x36a0 [ 133.787652][ T1082] ? vprintk_store+0x4c4/0x20d0 [ 133.792491][ T1082] ? vprintk_emit+0x25c/0x860 [ 133.797168][ T1082] ? dev_vprintk_emit+0x5f5/0x6d6 [ 133.802177][ T1082] ? dev_printk_emit+0x1d8/0x21a [ 133.807107][ T1082] ? __dev_printk+0x3de/0x460 [ 133.811779][ T1082] ? _dev_info+0x1e5/0x22a [ 133.816176][ T1082] ? r871xu_drv_init+0x1972/0x3090 [ 133.821275][ T1082] ? usb_probe_interface+0xf15/0x1530 [ 133.826638][ T1082] ? really_probe+0x66e/0x1510 [ 133.831402][ T1082] ? __driver_probe_device+0x3e9/0x530 [ 133.836848][ T1082] ? __device_attach_driver+0x79f/0x1120 [ 133.842476][ T1082] ? bus_for_each_drv+0x2f0/0x410 [ 133.847499][ T1082] ? __device_attach+0x593/0x8e0 [ 133.852426][ T1082] ? device_initial_probe+0x4a/0x60 [ 133.857633][ T1082] ? bus_probe_device+0x17b/0x3e0 [ 133.862641][ T1082] ? device_add+0x1d46/0x2400 [ 133.867300][ T1082] ? usb_set_configuration+0x389f/0x3ee0 [ 133.872917][ T1082] ? usb_generic_driver_probe+0x13c/0x300 [ 133.878630][ T1082] ? usb_probe_device+0x309/0x570 [ 133.883643][ T1082] ? really_probe+0x66e/0x1510 [ 133.888393][ T1082] ? __driver_probe_device+0x3e9/0x530 [ 133.893838][ T1082] ? __device_attach_driver+0x79f/0x1120 [ 133.899456][ T1082] ? bus_for_each_drv+0x2f0/0x410 [ 133.904468][ T1082] ? __device_attach+0x593/0x8e0 [ 133.909389][ T1082] ? device_initial_probe+0x4a/0x60 [ 133.914575][ T1082] ? bus_probe_device+0x17b/0x3e0 [ 133.919582][ T1082] ? device_add+0x1d46/0x2400 [ 133.924241][ T1082] ? usb_new_device+0x1b9a/0x2960 [ 133.929246][ T1082] ? hub_event+0x57cf/0x8690 [ 133.933823][ T1082] ? process_one_work+0xdc7/0x1760 [ 133.938929][ T1082] ? worker_thread+0x1101/0x22b0 [ 133.943856][ T1082] ? kthread+0x66b/0x780 [ 133.948083][ T1082] ? ret_from_fork+0x1f/0x30 [ 133.952666][ T1082] ? kmsan_get_metadata+0x11b/0x180 [ 133.957855][ T1082] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 133.964430][ T1082] __msan_warning+0xa9/0xf0 [ 133.969042][ T1082] string+0x4fd/0x700 [ 133.973020][ T1082] vsnprintf+0x224f/0x36a0 [ 133.977430][ T1082] pointer+0x184c/0x2060 [ 133.981661][ T1082] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 133.987453][ T1082] vsnprintf+0x1aaf/0x36a0 [ 133.991864][ T1082] vprintk_store+0x4c4/0x20d0 [ 133.996526][ T1082] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 134.002669][ T1082] ? vsnprintf+0x35a7/0x36a0 [ 134.007250][ T1082] ? snprintf+0x244/0x290 [ 134.011570][ T1082] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 134.017362][ T1082] vprintk_emit+0x25c/0x860 [ 134.021874][ T1082] dev_vprintk_emit+0x5f5/0x6d6 [ 134.026710][ T1082] dev_printk_emit+0x1d8/0x21a [ 134.031460][ T1082] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 134.037256][ T1082] __dev_printk+0x3de/0x460 [ 134.041753][ T1082] _dev_info+0x1e5/0x22a [ 134.045983][ T1082] ? usb_read8+0xe7/0x130 [ 134.050305][ T1082] ? r871xu_drv_init+0x1895/0x3090 [ 134.055405][ T1082] ? r8712_read8+0xa5/0xd0 [ 134.059813][ T1082] r871xu_drv_init+0x1972/0x3090 [ 134.064746][ T1082] ? r871x_dev_unload+0x310/0x310 [ 134.069776][ T1082] usb_probe_interface+0xf15/0x1530 [ 134.074969][ T1082] ? usb_register_driver+0x910/0x910 [ 134.080238][ T1082] really_probe+0x66e/0x1510 [ 134.084815][ T1082] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 134.090875][ T1082] __driver_probe_device+0x3e9/0x530 [ 134.096154][ T1082] __device_attach_driver+0x79f/0x1120 [ 134.101601][ T1082] bus_for_each_drv+0x2f0/0x410 [ 134.106437][ T1082] ? deferred_probe_work_func+0x4d0/0x4d0 [ 134.112142][ T1082] __device_attach+0x593/0x8e0 [ 134.116895][ T1082] device_initial_probe+0x4a/0x60 [ 134.121904][ T1082] bus_probe_device+0x17b/0x3e0 [ 134.126745][ T1082] device_add+0x1d46/0x2400 [ 134.131251][ T1082] ? kmsan_get_metadata+0x11b/0x180 [ 134.136435][ T1082] usb_set_configuration+0x389f/0x3ee0 [ 134.141879][ T1082] ? usb_set_configuration+0xb21/0x3ee0 [ 134.147419][ T1082] usb_generic_driver_probe+0x13c/0x300 [ 134.152964][ T1082] ? usb_choose_configuration+0xfa0/0xfa0 [ 134.158671][ T1082] usb_probe_device+0x309/0x570 [ 134.163509][ T1082] ? kmsan_get_metadata+0x110/0x180 [ 134.168691][ T1082] ? usb_register_device_driver+0x580/0x580 [ 134.174569][ T1082] really_probe+0x66e/0x1510 [ 134.179148][ T1082] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 134.185205][ T1082] __driver_probe_device+0x3e9/0x530 [ 134.190479][ T1082] __device_attach_driver+0x79f/0x1120 [ 134.195935][ T1082] bus_for_each_drv+0x2f0/0x410 [ 134.200782][ T1082] ? deferred_probe_work_func+0x4d0/0x4d0 [ 134.206496][ T1082] __device_attach+0x593/0x8e0 [ 134.211249][ T1082] device_initial_probe+0x4a/0x60 [ 134.216259][ T1082] bus_probe_device+0x17b/0x3e0 [ 134.221097][ T1082] device_add+0x1d46/0x2400 [ 134.225589][ T1082] usb_new_device+0x1b9a/0x2960 [ 134.230441][ T1082] hub_event+0x57cf/0x8690 [ 134.234846][ T1082] ? kmsan_get_metadata+0x11b/0x180 [ 134.240028][ T1082] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 134.245826][ T1082] ? led_work+0x7c0/0x7c0 [ 134.250138][ T1082] process_one_work+0xdc7/0x1760 [ 134.255073][ T1082] worker_thread+0x1101/0x22b0 [ 134.259825][ T1082] kthread+0x66b/0x780 [ 134.263879][ T1082] ? worker_clr_flags+0x370/0x370 [ 134.268894][ T1082] ? kthread_blkcg+0x120/0x120 [ 134.273727][ T1082] ret_from_fork+0x1f/0x30 [ 134.278404][ T1082] Kernel Offset: disabled [ 134.282709][ T1082] Rebooting in 86400 seconds..