linux-kernel - Re: freeze host when injecting NMIs in the guest, at least in 4.4-rc4+

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Date:	Thu, 10 Dec 2015 17:49:10 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Borislav Petkov <bp@...en8.de>, kvm@...r.kernel.org
Cc:	lkml <linux-kernel@...r.kernel.org>, qemu-devel@...gnu.org
Subject: Re: freeze host when injecting NMIs in the guest, at least in
 4.4-rc4+



On 10/12/2015 17:44, Borislav Petkov wrote:
> Yap,
> 
> this is clearly a qemu/kvm issue. Lemme remove ext4 folks from CC. So
> here's what happens:
> 
> I boot a kvm guest, connect to its monitor (qemu is started with
> "-monitor pty") and on the monitor I issue a couple of times the "nmi"
> command. It doesn't explode immediately but it happens pretty often and
> when it happens, the *host*(!) freezes with some nasty corruption, see
> below.
> 
> Thoughts, suggestions, ideas?

Can you try it on Intel?

Paolo
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