[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 53.814055][ T19] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 54.054007][ T19] usb 1-1: Using ep0 maxpacket: 16 [ 54.174184][ T19] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 54.185277][ T19] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 54.199986][ T19] usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00 [ 54.210861][ T19] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 54.223481][ T19] usb 1-1: config 0 descriptor?? [ 54.717952][ T19] input: HID 045e:07da as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.0/0003:045E:07DA.0001/input/input5 [ 54.799676][ T19] microsoft 0003:045E:07DA.0001: input,hidraw0: USB HID v0.00 Device [HID 045e:07da] on usb-dummy_hcd.0-1/input0 [ 54.923904][ C1] ================================================================================ [ 54.934057][ C1] UBSAN: shift-out-of-bounds in drivers/hid/hid-core.c:1315:20 [ 54.941618][ C1] shift exponent 4294967295 is too large for 32-bit type 'int' [ 54.949402][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.11.0-rc7-syzkaller #0 [ 54.957572][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.967812][ C1] Call Trace: [ 54.971098][ C1] [ 54.973940][ C1] dump_stack+0x137/0x1be [ 54.978615][ C1] ? __ubsan_handle_shift_out_of_bounds+0x277/0x4d0 [ 54.985223][ C1] __ubsan_handle_shift_out_of_bounds+0x432/0x4d0 [ 54.991694][ C1] ? kmalloc_order_trace+0x41/0x70 [ 54.996809][ C1] ? __kmalloc+0x257/0x330 [ 55.001332][ C1] hid_report_raw_event+0xa9d/0x1480 [ 55.006639][ C1] ? down_trylock+0x51/0x90 [ 55.011149][ C1] hid_input_report+0x3f6/0x4d0 [ 55.016005][ C1] hid_irq_in+0x48d/0x690 [ 55.020350][ C1] __usb_hcd_giveback_urb+0x375/0x520 [ 55.025859][ C1] dummy_timer+0xa22/0x2e70 [ 55.030578][ C1] ? rcu_read_lock_sched_held+0x41/0xb0 [ 55.036147][ C1] ? dummy_free_streams+0x310/0x310 [ 55.041431][ C1] call_timer_fn+0x91/0x160 [ 55.045950][ C1] ? dummy_free_streams+0x310/0x310 [ 55.051161][ C1] __run_timers+0x6c0/0x8a0 [ 55.055681][ C1] run_timer_softirq+0x63/0xf0 [ 55.060445][ C1] __do_softirq+0x318/0x714 [ 55.064952][ C1] ? asm_call_irq_on_stack+0xf/0x20 [ 55.070591][ C1] asm_call_irq_on_stack