From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48383) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a74PC-00025l-Mf for qemu-devel@nongnu.org; Thu, 10 Dec 2015 11:49:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a74P7-00050m-JA for qemu-devel@nongnu.org; Thu, 10 Dec 2015 11:49:22 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48332) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a74P7-00050h-Dv for qemu-devel@nongnu.org; Thu, 10 Dec 2015 11:49:17 -0500 References: <20151210140404.GA3049@nazgul.tnic> <20151210162733.GA6587@pd.tnic> <20151210164407.GA3593@nazgul.tnic> From: Paolo Bonzini Message-ID: <5669AD06.3030409@redhat.com> Date: Thu, 10 Dec 2015 17:49:10 +0100 MIME-Version: 1.0 In-Reply-To: <20151210164407.GA3593@nazgul.tnic> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] freeze host when injecting NMIs in the guest, at least in 4.4-rc4+ List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Borislav Petkov , kvm@vger.kernel.org Cc: lkml , qemu-devel@nongnu.org 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