Messages in this thread | | | Date | Fri, 20 Nov 1998 11:30:27 -0600 (CST) | From | "Pat St. Jean" <> | Subject | Re: Intel microcode fixes [OFF-TOPIC] |
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On Thu, 19 Nov 1998, Alex Buell wrote: >On Thu, 19 Nov 1998, John Fulmer wrote: >> Does Linux protect the cpu at all in this instance? > >Don't think so.
How could it? IIRC, the "new" microcode is stored in the flash rom with the BIOS. One of the first things the machine does on startup is update the microcode. Linux isn't even in existance at that time.
You can't have the kernel reset the processor, because I'll just rewrite the reset commands in the malicious microcode to noop.
Can of worms indeed. Anyone know if the mainframers thought of this?
Pat
-- Patrick St. Jean '97 XLH 883 psj@cgmlarson.com Programmer & Systems Administrator +1 713-977-4177 x115 Larson Software Technology http://www.cgmlarson.com
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