Re: [PATCH] Re: SSE related security hole

H. Peter Anvin
2002-04-20T00:19:06Z

>
>
> On Fri, 19 Apr 2002, H. Peter Anvin wrote:
>>
>> Indeed. Logically, FNINIT should have been extended to initialize it
>> all - - it is a security hole that it doesn't initialize MMX properly.
>
> Well, MMX should arguably be initialized with "emms", so the proper
> sequence migth be something like
>

Remember that one of the original design goals of MMX was to run on
unmodified operating systems (and it can't be turned off); thus needing
any extra initialization is a bug.

-hpa