Re: Major KVM issues with kernel 4.5 on the host

From: Andrey Korolyov
Date: Sun Mar 20 2016 - 14:52:39 EST

On Sun, Mar 20, 2016 at 9:25 PM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> On Sun, Mar 20, 2016 at 08:14:58PM +0300, Andrey Korolyov wrote:
>> Kinda naive question - do you run same ucode version as Marc on his device?
> Yeah, we both have 0x010000dc.
> In case you're referring to the recent faulty AMD microcode patch -
> it doesn't apply here. The boxes in question are family 0x10 and the
> microcode patch is for family 0x15.

Yes, I suggested that the issue could fall over a different family as
well to expose explicit corruption of a guest pages (as opposed to a
generic corruption in a known case). Since there is no direct evidence
of what exactly (data or pgt) is getting corrupted, would disabling
npt for a testing purposes be helpful?