reg: Fail if the data value passed with REG_DWORD will cause an overflow

[Alexandre Julliard]

Hugh McMaster <hugh.mcmaster at outlook.com> writes:

> @@ -243,8 +243,17 @@ static LPBYTE get_regdata(LPWSTR data, DWORD reg_type, WCHAR separator, DWORD *r
>          {
>              LPWSTR rest;
>              DWORD val;
> +            BOOL overflow = FALSE;
> +            if (data[1] == 'x')
> +            {
> +                WCHAR *ptr = &data[2];
> +                while (*ptr == '0')
> +                    ptr++;
> +                if (strlenW(ptr) > 8)
> +                    overflow = TRUE;
> +            }
>              val = strtoulW(data, &rest, (data[1] == 'x') ? 16 : 10);

You won't be able to catch base 10 overflows this way. It probably needs
a more general solution (and some more test cases...)

-- 
Alexandre Julliard
julliard at winehq.org