On 25.06.2023 18:42, Zhang Shurong wrote: > --- a/drivers/usb/host/xen-hcd.c > +++ b/drivers/usb/host/xen-hcd.c > @@ -456,6 +456,8 @@ static int xenhcd_hub_control(struct usb_hcd *hcd, __u16 typeReq, __u16 wValue, > info->ports[wIndex - 1].c_connection = false; > fallthrough; > default: > + if (wValue >= 32) > + goto error; > info->ports[wIndex - 1].status &= ~(1 << wValue); Even 31 is out of bounds (as in: UB) as long as it's 1 here rather than 1u. Jan
