Re: SSE related security hole

Alan Cox
2002-04-18T11:00:42Z

> This mean the mmx isn't really backwards compatible and that's
> potentially a problem for all the legacy x86 multiuser operative
> systems. That's an hardware design bug, not a software problem. In
> short running a 2.[02] kernel on a MMX capable CPU isn't secure, the
> same potentially applies to windows NT and other unix, no matter of SSE.

That was my initial reaction but when I reread the documentation the
Intel folks are actually saying even back in Pentium MMX days that it isnt
guaranteed that the FP/MMX state are not seperate registers