[ OK ] Started Permit User Sessions. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started System Logging Service. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.252' (ECDSA) to the list of known hosts. syzkaller login: [ 136.262387][ T7] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 136.622684][ T7] usb 1-1: config 122 interface 0 altsetting 0 has an invalid endpoint with address 0x0, skipping [ 136.812636][ T7] usb 1-1: New USB device found, idVendor=13d3, idProduct=3333, bcdDevice= 7.ac [ 136.821928][ T7] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 136.830243][ T7] usb 1-1: Product: syz [ 136.834685][ T7] usb 1-1: Manufacturer: syz [ 136.839394][ T7] usb 1-1: SerialNumber: syz [ 136.897553][ T7] r8712u: register rtl8712_netdev_ops to netdev_ops [ 136.904679][ T7] usb 1-1: r8712u: USB_SPEED_HIGH with 0 endpoints [ 137.012438][ T7] ===================================================== [ 137.019476][ T7] BUG: KMSAN: uninit-value in string+0x4fd/0x700 [ 137.025795][ T7] string+0x4fd/0x700 [ 137.029768][ T7] vsnprintf+0x224f/0x36a0 [ 137.034304][ T7] pointer+0x184c/0x2060 [ 137.038537][ T7] vsnprintf+0x1aaf/0x36a0 [ 137.042943][ T7] vprintk_store+0x4c4/0x20d0 [ 137.047610][ T7] vprintk_emit+0x25c/0x860 [ 137.052098][ T7] dev_vprintk_emit+0x5f5/0x6d6 [ 137.056944][ T7] dev_printk_emit+0x1d8/0x21a [ 137.061757][ T7] __dev_printk+0x3de/0x460 [ 137.066255][ T7] _dev_info+0x1e5/0x22a [ 137.070481][ T7] r871xu_drv_init+0x1972/0x3090 [ 137.075409][ T7] usb_probe_interface+0xf15/0x1530 [ 137.080597][ T7] really_probe+0x66e/0x1510 [ 137.085175][ T7] __driver_probe_device+0x3e9/0x530 [ 137.090447][ T7] __device_attach_driver+0x79f/0x1120 [ 137.095894][ T7] bus_for_each_drv+0x2f0/0x410 [ 137.100749][ T7] __device_attach+0x593/0x8e0 [ 137.105509][ T7] device_initial_probe+0x4a/0x60 [ 137.110525][ T7] bus_probe_device+0x17b/0x3e0 [ 137.115452][ T7] device_add+0x1d46/0x2400 [ 137.119963][ T7] usb_set_configuration+0x389f/0x3ee0 [ 137.125436][ T7] usb_generic_driver_probe+0x13c/0x300 [ 137.131056][ T7] usb_probe_device+0x309/0x570 [ 137.135893][ T7] really_probe+0x66e/0x1510 [ 137.140475][ T7] __driver_probe_device+0x3e9/0x530 [ 137.145759][ T7] __device_attach_driver+0x79f/0x1120 [ 137.151247][ T7] bus_for_each_drv+0x2f0/0x410 [ 137.156085][ T7] __device_attach+0x593/0x8e0 [ 137.160869][ T7] device_initial_probe+0x4a/0x60 [ 137.165882][ T7] bus_probe_device+0x17b/0x3e0 [ 137.170719][ T7] device_add+0x1d46/0x2400 [ 137.175204][ T7] usb_new_device+0x1b9a/0x2960 [ 137.180037][ T7] hub_event+0x57cf/0x8690 [ 137.184436][ T7] process_one_work+0xdc7/0x1760 [ 137.189369][ T7] worker_thread+0x1101/0x22b0 [ 137.194132][ T7] kthread+0x66b/0x780 [ 137.198186][ T7] ret_from_fork+0x1f/0x30 [ 137.202597][ T7] [ 137.205077][ T7] Local variable ----data@usb_read8 created at: [ 137.211375][ T7] usb_read8+0x5d/0x130 [ 137.215517][ T7] r8712_read8+0xa5/0xd0 [ 137.219743][ T7] ===================================================== [ 137.226655][ T7] Disabling lock debugging due to kernel taint [ 137.232869][ T7] Kernel panic - not syncing: panic_on_kmsan set ... [ 137.239709][ T7] CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G B 5.15.0-rc2-syzkaller #0 [ 137.249246][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.259391][ T7] Workqueue: usb_hub_wq hub_event [ 137.264410][ T7] Call Trace: [ 137.267693][ T7] dump_stack_lvl+0x1ff/0x28e [ 137.272359][ T7] dump_stack+0x25/0x28 [ 137.276517][ T7] panic+0x44f/0xdeb [ 137.280418][ T7] ? add_taint+0x187/0x210 [ 137.284827][ T7] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 137.290982][ T7] kmsan_report+0x2ee/0x300 [ 137.295489][ T7] ? __msan_warning+0xa9/0xf0 [ 137.300166][ T7] ? string+0x4fd/0x700 [ 137.304311][ T7] ? vsnprintf+0x224f/0x36a0 [ 137.308916][ T7] ? pointer+0x184c/0x2060 [ 137.313429][ T7] ? vsnprintf+0x1aaf/0x36a0 [ 137.318030][ T7] ? vprintk_store+0x4c4/0x20d0 [ 137.322896][ T7] ? vprintk_emit+0x25c/0x860 [ 137.327711][ T7] ? dev_vprintk_emit+0x5f5/0x6d6 [ 137.332734][ T7] ? dev_printk_emit+0x1d8/0x21a [ 137.337673][ T7] ? __dev_printk+0x3de/0x460 [ 137.342370][ T7] ? _dev_info+0x1e5/0x22a [ 137.346825][ T7] ? r871xu_drv_init+0x1972/0x3090 [ 137.351929][ T7] ? usb_probe_interface+0xf15/0x1530 [ 137.357298][ T7] ? really_probe+0x66e/0x1510 [ 137.362097][ T7] ? __driver_probe_device+0x3e9/0x530 [ 137.367578][ T7] ? __device_attach_driver+0x79f/0x1120 [ 137.373308][ T7] ? bus_for_each_drv+0x2f0/0x410 [ 137.378337][ T7] ? __device_attach+0x593/0x8e0 [ 137.383270][ T7] ? device_initial_probe+0x4a/0x60 [ 137.388468][ T7] ? bus_probe_device+0x17b/0x3e0 [ 137.393499][ T7] ? device_add+0x1d46/0x2400 [ 137.398194][ T7] ? usb_set_configuration+0x389f/0x3ee0 [ 137.403826][ T7] ? usb_generic_driver_probe+0x13c/0x300 [ 137.409569][ T7] ? usb_probe_device+0x309/0x570 [ 137.414811][ T7] ? really_probe+0x66e/0x1510 [ 137.419578][ T7] ? __driver_probe_device+0x3e9/0x530 [ 137.425031][ T7] ? __device_attach_driver+0x79f/0x1120 [ 137.430655][ T7] ? bus_for_each_drv+0x2f0/0x410 [ 137.435668][ T7] ? __device_attach+0x593/0x8e0 [ 137.440602][ T7] ? device_initial_probe+0x4a/0x60 [ 137.445817][ T7] ? bus_probe_device+0x17b/0x3e0 [ 137.450834][ T7] ? device_add+0x1d46/0x2400 [ 137.455521][ T7] ? usb_new_device+0x1b9a/0x2960 [ 137.460537][ T7] ? hub_event+0x57cf/0x8690 [ 137.465139][ T7] ? process_one_work+0xdc7/0x1760 [ 137.470357][ T7] ? worker_thread+0x1101/0x22b0 [ 137.475338][ T7] ? kthread+0x66b/0x780 [ 137.479576][ T7] ? ret_from_fork+0x1f/0x30 [ 137.484164][ T7] ? kmsan_get_metadata+0x11b/0x180 [ 137.489355][ T7] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.495162][ T7] __msan_warning+0xa9/0xf0 [ 137.499662][ T7] string+0x4fd/0x700 [ 137.503740][ T7] vsnprintf+0x224f/0x36a0 [ 137.508157][ T7] pointer+0x184c/0x2060 [ 137.512390][ T7] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.518192][ T7] vsnprintf+0x1aaf/0x36a0 [ 137.522628][ T7] vprintk_store+0x4c4/0x20d0 [ 137.527318][ T7] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 137.533472][ T7] ? vsnprintf+0x35a7/0x36a0 [ 137.538061][ T7] ? snprintf+0x244/0x290 [ 137.542389][ T7] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.548215][ T7] vprintk_emit+0x25c/0x860 [ 137.552724][ T7] dev_vprintk_emit+0x5f5/0x6d6 [ 137.557619][ T7] dev_printk_emit+0x1d8/0x21a [ 137.562395][ T7] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.568197][ T7] __dev_printk+0x3de/0x460 [ 137.572700][ T7] _dev_info+0x1e5/0x22a [ 137.576971][ T7] ? usb_read8+0xe7/0x130 [ 137.581355][ T7] ? r871xu_drv_init+0x1895/0x3090 [ 137.586487][ T7] ? r8712_read8+0xa5/0xd0 [ 137.590922][ T7] r871xu_drv_init+0x1972/0x3090 [ 137.595872][ T7] ? r871x_dev_unload+0x310/0x310 [ 137.600894][ T7] usb_probe_interface+0xf15/0x1530 [ 137.606095][ T7] ? usb_register_driver+0x910/0x910 [ 137.611376][ T7] really_probe+0x66e/0x1510 [ 137.615992][ T7] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 137.622110][ T7] __driver_probe_device+0x3e9/0x530 [ 137.627431][ T7] __device_attach_driver+0x79f/0x1120 [ 137.632915][ T7] bus_for_each_drv+0x2f0/0x410 [ 137.637853][ T7] ? deferred_probe_work_func+0x4d0/0x4d0 [ 137.643692][ T7] __device_attach+0x593/0x8e0 [ 137.648486][ T7] device_initial_probe+0x4a/0x60 [ 137.653522][ T7] bus_probe_device+0x17b/0x3e0 [ 137.658375][ T7] device_add+0x1d46/0x2400 [ 137.662889][ T7] ? kmsan_get_metadata+0x11b/0x180 [ 137.668081][ T7] usb_set_configuration+0x389f/0x3ee0 [ 137.673544][ T7] ? usb_set_configuration+0xb21/0x3ee0 [ 137.679208][ T7] usb_generic_driver_probe+0x13c/0x300 [ 137.684754][ T7] ? usb_choose_configuration+0xfa0/0xfa0 [ 137.690582][ T7] usb_probe_device+0x309/0x570 [ 137.695441][ T7] ? kmsan_get_metadata+0x110/0x180 [ 137.700641][ T7] ? usb_register_device_driver+0x580/0x580 [ 137.706691][ T7] really_probe+0x66e/0x1510 [ 137.711311][ T7] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 137.717385][ T7] __driver_probe_device+0x3e9/0x530 [ 137.722674][ T7] __device_attach_driver+0x79f/0x1120 [ 137.728160][ T7] bus_for_each_drv+0x2f0/0x410 [ 137.733008][ T7] ? deferred_probe_work_func+0x4d0/0x4d0 [ 137.738730][ T7] __device_attach+0x593/0x8e0 [ 137.743582][ T7] device_initial_probe+0x4a/0x60 [ 137.748608][ T7] bus_probe_device+0x17b/0x3e0 [ 137.753464][ T7] device_add+0x1d46/0x2400 [ 137.757969][ T7] usb_new_device+0x1b9a/0x2960 [ 137.762839][ T7] hub_event+0x57cf/0x8690 [ 137.767262][ T7] ? kmsan_get_metadata+0x11b/0x180 [ 137.772534][ T7] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.778333][ T7] ? led_work+0x7c0/0x7c0 [ 137.782653][ T7] process_one_work+0xdc7/0x1760 [ 137.787586][ T7] worker_thread+0x1101/0x22b0 [ 137.792356][ T7] kthread+0x66b/0x780 [ 137.796425][ T7] ? worker_clr_flags+0x370/0x370 [ 137.801544][ T7] ? kthread_blkcg+0x120/0x120 [ 137.806294][ T7] ret_from_fork+0x1f/0x30 [ 137.810986][ T7] Kernel Offset: disabled [ 137.815302][ T7] Rebooting in 86400 seconds..