[ 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 '10.128.1.97' (ECDSA) to the list of known hosts. syzkaller login: [ 136.222094][ T66] usb 1-1: new full-speed USB device number 2 using dummy_hcd [ 136.622379][ T66] usb 1-1: config 0 has an invalid interface number: 193 but max is 0 [ 136.630697][ T66] usb 1-1: config 0 has no interface number 0 [ 136.637101][ T66] usb 1-1: New USB device found, idVendor=0df6, idProduct=005b, bcdDevice=ac.d3 [ 136.646513][ T66] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 136.658418][ T66] usb 1-1: config 0 descriptor?? [ 136.719458][ T66] r8712u: register rtl8712_netdev_ops to netdev_ops [ 136.726338][ T66] usb 1-1: r8712u: USB_SPEED_LOW with 0 endpoints [ 136.832665][ T66] ===================================================== [ 136.839814][ T66] BUG: KMSAN: uninit-value in string+0x4fd/0x700 [ 136.846141][ T66] string+0x4fd/0x700 [ 136.850115][ T66] vsnprintf+0x224f/0x36a0 [ 136.854522][ T66] pointer+0x184c/0x2060 [ 136.858775][ T66] vsnprintf+0x1aaf/0x36a0 [ 136.863180][ T66] vprintk_store+0x4c4/0x20d0 [ 136.868125][ T66] vprintk_emit+0x25c/0x860 [ 136.872656][ T66] dev_vprintk_emit+0x5f5/0x6d6 [ 136.877527][ T66] dev_printk_emit+0x1d8/0x21a [ 136.882322][ T66] __dev_printk+0x3de/0x460 [ 136.886821][ T66] _dev_info+0x1e5/0x22a [ 136.891061][ T66] r871xu_drv_init+0x1972/0x3090 [ 136.896015][ T66] usb_probe_interface+0xf15/0x1530 [ 136.901359][ T66] really_probe+0x66e/0x1510 [ 136.905962][ T66] __driver_probe_device+0x3e9/0x530 [ 136.911258][ T66] __device_attach_driver+0x79f/0x1120 [ 136.916786][ T66] bus_for_each_drv+0x2f0/0x410 [ 136.921648][ T66] __device_attach+0x593/0x8e0 [ 136.926412][ T66] device_initial_probe+0x4a/0x60 [ 136.931584][ T66] bus_probe_device+0x17b/0x3e0 [ 136.936469][ T66] device_add+0x1d46/0x2400 [ 136.940987][ T66] usb_set_configuration+0x389f/0x3ee0 [ 136.946443][ T66] usb_generic_driver_probe+0x13c/0x300 [ 136.952003][ T66] usb_probe_device+0x309/0x570 [ 136.956881][ T66] really_probe+0x66e/0x1510 [ 136.961477][ T66] __driver_probe_device+0x3e9/0x530 [ 136.966769][ T66] __device_attach_driver+0x79f/0x1120 [ 136.972409][ T66] bus_for_each_drv+0x2f0/0x410 [ 136.977262][ T66] __device_attach+0x593/0x8e0 [ 136.982047][ T66] device_initial_probe+0x4a/0x60 [ 136.987182][ T66] bus_probe_device+0x17b/0x3e0 [ 136.992042][ T66] device_add+0x1d46/0x2400 [ 136.996563][ T66] usb_new_device+0x1b9a/0x2960 [ 137.002973][ T66] hub_event+0x57cf/0x8690 [ 137.007397][ T66] process_one_work+0xdc7/0x1760 [ 137.012357][ T66] worker_thread+0x1101/0x22b0 [ 137.017125][ T66] kthread+0x66b/0x780 [ 137.021198][ T66] ret_from_fork+0x1f/0x30 [ 137.025619][ T66] [ 137.027994][ T66] Local variable ----data@usb_read8 created at: [ 137.034221][ T66] usb_read8+0x5d/0x130 [ 137.038567][ T66] r8712_read8+0xa5/0xd0 [ 137.042815][ T66] ===================================================== [ 137.049836][ T66] Disabling lock debugging due to kernel taint [ 137.055978][ T66] Kernel panic - not syncing: panic_on_kmsan set ... [ 137.062644][ T66] CPU: 1 PID: 66 Comm: kworker/1:1 Tainted: G B 5.15.0-rc2-syzkaller #0 [ 137.072270][ T66] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 137.082587][ T66] Workqueue: usb_hub_wq hub_event [ 137.087726][ T66] Call Trace: [ 137.090998][ T66] dump_stack_lvl+0x1ff/0x28e [ 137.095764][ T66] dump_stack+0x25/0x28 [ 137.099925][ T66] panic+0x44f/0xdeb [ 137.103814][ T66] ? add_taint+0x187/0x210 [ 137.108234][ T66] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 137.114388][ T66] kmsan_report+0x2ee/0x300 [ 137.118905][ T66] ? __msan_warning+0xa9/0xf0 [ 137.123608][ T66] ? string+0x4fd/0x700 [ 137.127774][ T66] ? vsnprintf+0x224f/0x36a0 [ 137.132444][ T66] ? pointer+0x184c/0x2060 [ 137.136848][ T66] ? vsnprintf+0x1aaf/0x36a0 [ 137.141452][ T66] ? vprintk_store+0x4c4/0x20d0 [ 137.146402][ T66] ? vprintk_emit+0x25c/0x860 [ 137.151079][ T66] ? dev_vprintk_emit+0x5f5/0x6d6 [ 137.156107][ T66] ? dev_printk_emit+0x1d8/0x21a [ 137.161036][ T66] ? __dev_printk+0x3de/0x460 [ 137.165708][ T66] ? _dev_info+0x1e5/0x22a [ 137.170361][ T66] ? r871xu_drv_init+0x1972/0x3090 [ 137.175769][ T66] ? usb_probe_interface+0xf15/0x1530 [ 137.181162][ T66] ? really_probe+0x66e/0x1510 [ 137.185944][ T66] ? __driver_probe_device+0x3e9/0x530 [ 137.191434][ T66] ? __device_attach_driver+0x79f/0x1120 [ 137.197075][ T66] ? bus_for_each_drv+0x2f0/0x410 [ 137.202102][ T66] ? __device_attach+0x593/0x8e0 [ 137.207064][ T66] ? device_initial_probe+0x4a/0x60 [ 137.212344][ T66] ? bus_probe_device+0x17b/0x3e0 [ 137.217388][ T66] ? device_add+0x1d46/0x2400 [ 137.222058][ T66] ? usb_set_configuration+0x389f/0x3ee0 [ 137.227772][ T66] ? usb_generic_driver_probe+0x13c/0x300 [ 137.234033][ T66] ? usb_probe_device+0x309/0x570 [ 137.239060][ T66] ? really_probe+0x66e/0x1510 [ 137.243909][ T66] ? __driver_probe_device+0x3e9/0x530 [ 137.251311][ T66] ? __device_attach_driver+0x79f/0x1120 [ 137.256980][ T66] ? bus_for_each_drv+0x2f0/0x410 [ 137.262006][ T66] ? __device_attach+0x593/0x8e0 [ 137.267076][ T66] ? device_initial_probe+0x4a/0x60 [ 137.272359][ T66] ? bus_probe_device+0x17b/0x3e0 [ 137.277468][ T66] ? device_add+0x1d46/0x2400 [ 137.282136][ T66] ? usb_new_device+0x1b9a/0x2960 [ 137.287155][ T66] ? hub_event+0x57cf/0x8690 [ 137.291771][ T66] ? process_one_work+0xdc7/0x1760 [ 137.297120][ T66] ? worker_thread+0x1101/0x22b0 [ 137.302070][ T66] ? kthread+0x66b/0x780 [ 137.306310][ T66] ? ret_from_fork+0x1f/0x30 [ 137.310941][ T66] ? kmsan_get_metadata+0x11b/0x180 [ 137.316136][ T66] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.321950][ T66] __msan_warning+0xa9/0xf0 [ 137.326576][ T66] string+0x4fd/0x700 [ 137.330583][ T66] vsnprintf+0x224f/0x36a0 [ 137.335128][ T66] pointer+0x184c/0x2060 [ 137.339487][ T66] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.345359][ T66] vsnprintf+0x1aaf/0x36a0 [ 137.349821][ T66] vprintk_store+0x4c4/0x20d0 [ 137.354500][ T66] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 137.360662][ T66] ? vsnprintf+0x35a7/0x36a0 [ 137.365268][ T66] ? snprintf+0x244/0x290 [ 137.369598][ T66] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.375396][ T66] vprintk_emit+0x25c/0x860 [ 137.379941][ T66] dev_vprintk_emit+0x5f5/0x6d6 [ 137.384795][ T66] dev_printk_emit+0x1d8/0x21a [ 137.389560][ T66] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.395366][ T66] __dev_printk+0x3de/0x460 [ 137.399949][ T66] _dev_info+0x1e5/0x22a [ 137.404204][ T66] ? usb_read8+0xe7/0x130 [ 137.408543][ T66] ? r871xu_drv_init+0x1895/0x3090 [ 137.413645][ T66] ? r8712_read8+0xa5/0xd0 [ 137.418064][ T66] r871xu_drv_init+0x1972/0x3090 [ 137.423169][ T66] ? r871x_dev_unload+0x310/0x310 [ 137.428188][ T66] usb_probe_interface+0xf15/0x1530 [ 137.433404][ T66] ? usb_register_driver+0x910/0x910 [ 137.438681][ T66] really_probe+0x66e/0x1510 [ 137.443272][ T66] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 137.449369][ T66] __driver_probe_device+0x3e9/0x530 [ 137.454762][ T66] __device_attach_driver+0x79f/0x1120 [ 137.460264][ T66] bus_for_each_drv+0x2f0/0x410 [ 137.465209][ T66] ? deferred_probe_work_func+0x4d0/0x4d0 [ 137.470950][ T66] __device_attach+0x593/0x8e0 [ 137.475731][ T66] device_initial_probe+0x4a/0x60 [ 137.480748][ T66] bus_probe_device+0x17b/0x3e0 [ 137.485611][ T66] device_add+0x1d46/0x2400 [ 137.490106][ T66] ? kmsan_get_metadata+0x11b/0x180 [ 137.495295][ T66] usb_set_configuration+0x389f/0x3ee0 [ 137.500841][ T66] ? usb_set_configuration+0xb21/0x3ee0 [ 137.506407][ T66] usb_generic_driver_probe+0x13c/0x300 [ 137.511951][ T66] ? usb_choose_configuration+0xfa0/0xfa0 [ 137.517696][ T66] usb_probe_device+0x309/0x570 [ 137.522553][ T66] ? kmsan_get_metadata+0x110/0x180 [ 137.527755][ T66] ? usb_register_device_driver+0x580/0x580 [ 137.533732][ T66] really_probe+0x66e/0x1510 [ 137.538340][ T66] ? kmsan_internal_unpoison_memory+0x10/0x20 [ 137.544425][ T66] __driver_probe_device+0x3e9/0x530 [ 137.549725][ T66] __device_attach_driver+0x79f/0x1120 [ 137.555240][ T66] bus_for_each_drv+0x2f0/0x410 [ 137.560096][ T66] ? deferred_probe_work_func+0x4d0/0x4d0 [ 137.565957][ T66] __device_attach+0x593/0x8e0 [ 137.570734][ T66] device_initial_probe+0x4a/0x60 [ 137.575764][ T66] bus_probe_device+0x17b/0x3e0 [ 137.580628][ T66] device_add+0x1d46/0x2400 [ 137.585324][ T66] usb_new_device+0x1b9a/0x2960 [ 137.590171][ T66] hub_event+0x57cf/0x8690 [ 137.594930][ T66] ? kmsan_get_metadata+0x11b/0x180 [ 137.600122][ T66] ? kmsan_get_shadow_origin_ptr+0x90/0xc0 [ 137.605945][ T66] ? led_work+0x7c0/0x7c0 [ 137.610271][ T66] process_one_work+0xdc7/0x1760 [ 137.615218][ T66] worker_thread+0x1101/0x22b0 [ 137.620076][ T66] ? kmsan_get_metadata+0x11b/0x180 [ 137.625333][ T66] kthread+0x66b/0x780 [ 137.629647][ T66] ? worker_clr_flags+0x370/0x370 [ 137.634731][ T66] ? kthread_blkcg+0x120/0x120 [ 137.639531][ T66] ret_from_fork+0x1f/0x30 [ 137.644392][ T66] Kernel Offset: disabled [ 137.648723][ T66] Rebooting in 86400 seconds..