From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0C050C43458 for ; Wed, 8 Jul 2026 08:10:42 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1whNM1-00047v-2k; Wed, 08 Jul 2026 04:10:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1whNLu-00047W-T7 for qemu-devel@nongnu.org; Wed, 08 Jul 2026 04:09:54 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1whNLs-0002gR-1Z for qemu-devel@nongnu.org; Wed, 08 Jul 2026 04:09:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783498190; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0TB7DFqel2rPM5dpQalW14jchk3pumPA/dLu8HfST0A=; b=JBlvAyOUf/XL7S0XPQDwpo7w/UsaMbZMypzaBXnhvkmEDeGtpvJzvjDXLnkDsinyU7HeyS VBnHXytYfYWNFHTPVQJLLaVV8rmVNA7Hra1RzuqkQdGg0a5UgiW6AR98e4OA5+AaeqD3Op Har6kgEbj+sgQeV4HrbDYQTlkBvnVUE= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-103-Yy9gGY1tOY2G3ByehRQtug-1; Wed, 08 Jul 2026 04:09:48 -0400 X-MC-Unique: Yy9gGY1tOY2G3ByehRQtug-1 X-Mimecast-MFC-AGG-ID: Yy9gGY1tOY2G3ByehRQtug_1783498187 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 40B8E18052E3; Wed, 8 Jul 2026 08:09:47 +0000 (UTC) Received: from redhat.com (unknown [10.44.49.28]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 22D3B1955F43; Wed, 8 Jul 2026 08:09:45 +0000 (UTC) Date: Wed, 8 Jul 2026 09:09:42 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Anatol Belski Cc: qemu-devel@nongnu.org Subject: Re: [RFC] virtio-villain: Guest fault injection for VMM robustness Message-ID: References: <98dd26094403c204c7c2f0270d96b9c75842c7d8.camel@linux.microsoft.com> <861020196095d6d91a83b878a1ed744b2824d159.camel@linux.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <861020196095d6d91a83b878a1ed744b2824d159.camel@linux.microsoft.com> User-Agent: Mutt/2.3.2 (2026-04-26) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Tue, Jul 07, 2026 at 11:09:12PM +0200, Anatol Belski wrote: > On Tue, 2026-07-07 at 11:39 +0100, Daniel P. Berrangé wrote: > > > We appreciate the intent not to flood projects ! Feel free to > > drip-feed issues to us, a handful at a time though over days > > or weeks if there will be alot to process. > > > > We recently switched our security disclosure process over to using > > our regular GitLab issue tracker, so would prefer any bugs to be > > filed there, rather than emailing people directly: > > > >   https://www.qemu.org/contribute/security-process/ > > Perfect, that makes it easy. I will file on the GitLab tracker and > send them in small batches over the next couple of weeks rather than > all at once. For the ones with a host side impact, a guest triggered > hang or use after free, I will tick the confidential box and let > triage decide whether it stays that way. > > > > We also have tests/functional/ in QEMU where we boot real guest OS > > disk images and/or kernel/initrd pairs. The minimal initramfs > > approach would probably fit in nicely with that, and indeed I have > > long wanted us to replace some of our full-fat disk images with > > minimal self contained initramfs images to speed up smoke testing. > > That sounds like a clean fit. The harness already boots a kernel plus > a tiny initramfs with a single static init and no full OS, so it > should slot into tests/functional/ with little friction. Each test > finishes in under a second when passing, since there is no full VM > boot involved, which makes it suitable for smoke testing too. Would > it be useful to have these wired in there directly, or is there a > different shape that would work better for you? Yes, I think it'd be interesting to try to fit them directly into a functional test script. I guess having the virtio-villain repo as a git submodule would probably be the way to go to access the individual tests to build the initramfs. With regards, Daniel -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|