Re: [PATCH] x86/asm/entry/32: Restore %ss before SYSRETL if necessary

[Borislav Petkov]

On Thu, Apr 23, 2015 at 09:05:07AM -0700, Linus Torvalds wrote:
> So it sounds very much like an AMD bug/misfeature. Because sysret
> *should* reset the descriptor cache. Do we know whether this affects
> *all* AMD CPU's or just a subset?

I am being told that this might appear to be the case with at least one
uarch. I could run code on the boxes I have here to check if Andy comes
up with some nice little "exploit".

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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