[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 148.248211][ T4894] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 148.488194][ T4894] usb 1-1: Using ep0 maxpacket: 16 [ 148.608521][ T4894] usb 1-1: config 0 has an invalid interface number: 219 but max is 0 [ 148.616813][ T4894] usb 1-1: config 0 has no interface number 0 [ 148.623286][ T4894] usb 1-1: config 0 interface 219 altsetting 0 endpoint 0xA has invalid wMaxPacketSize 0 [ 148.633537][ T4894] usb 1-1: New USB device found, idVendor=078c, idProduct=1002, bcdDevice=e6.47 [ 148.642909][ T4894] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 148.653650][ T4894] usb 1-1: config 0 descriptor?? [ 148.918419][ T4894] gtco 1-1:0.219: Collection level already at zero [ 148.926645][ T4894] input: GTCO_CalComp as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.219/input/input5 [ 148.936798][ T4894] ===================================================== [ 148.943785][ T4894] BUG: KMSAN: uninit-value in joydev_connect+0x10c0/0x1920 [ 148.951013][ T4894] CPU: 0 PID: 4894 Comm: kworker/0:2 Not tainted 5.8.0-rc5-syzkaller #0 [ 148.959357][ T4894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 148.969450][ T4894] Workqueue: usb_hub_wq hub_event [ 148.974502][ T4894] Call Trace: [ 148.977823][ T4894] dump_stack+0x21c/0x280 [ 148.982193][ T4894] kmsan_report+0xf7/0x1e0 [ 148.986650][ T4894] __msan_warning+0x58/0xa0 [ 148.991189][ T4894] joydev_connect+0x10c0/0x1920 [ 148.996111][ T4894] input_register_device+0x1d7b/0x21c0 [ 149.001614][ T4894] ? joydev_match+0x880/0x880 [ 149.006349][ T4894] gtco_probe+0x32ce/0x39b0 [ 149.010949][ T4894] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.016793][ T4894] ? store_tabletExecute+0x150/0x150 [ 149.022113][ T4894] usb_probe_interface+0xece/0x1550 [ 149.027373][ T4894] ? usb_register_driver+0x900/0x900 [ 149.032701][ T4894] really_probe+0xf20/0x20b0 [ 149.037337][ T4894] ? kmsan_get_metadata+0x116/0x180 [ 149.042586][ T4894] driver_probe_device+0x293/0x390 [ 149.047741][ T4894] __device_attach_driver+0x63f/0x830 [ 149.053179][ T4894] bus_for_each_drv+0x2ca/0x3f0 [ 149.058065][ T4894] ? coredump_store+0xf0/0xf0 [ 149.062786][ T4894] __device_attach+0x4e2/0x7f0 [ 149.067592][ T4894] device_initial_probe+0x4a/0x60 [ 149.072655][ T4894] bus_probe_device+0x177/0x3d0 [ 149.077542][ T4894] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 149.083379][ T4894] device_add+0x3b0e/0x40d0 [ 149.087951][ T4894] usb_set_configuration+0x380f/0x3f10 [ 149.093457][ T4894] ? usb_set_configuration+0xb41/0x3f10 [ 149.099083][ T4894] usb_generic_driver_probe+0x138/0x300 [ 149.104667][ T4894] ? usb_choose_configuration+0xe70/0xe70 [ 149.110421][ T4894] usb_probe_device+0x311/0x490 [ 149.115320][ T4894] ? usb_register_device_d