Re: [PATCH] Re: SSE related security hole
Brian Gerst (email@example.com)
Fri, 19 Apr 2002 20:11:03 -0400
Linus Torvalds wrote:
> 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
> if (sse)
> What does emms do to SSE2?
All emms does is reset the tag word. It doesn't touch the registers.
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