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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F4D2C433FF for ; Thu, 8 Aug 2019 10:42:41 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E69B62084D for ; Thu, 8 Aug 2019 10:42:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E69B62084D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48234 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hvfsW-00070t-6g for qemu-devel@archiver.kernel.org; Thu, 08 Aug 2019 06:42:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36146) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hvfs9-0006b4-86 for qemu-devel@nongnu.org; Thu, 08 Aug 2019 06:42:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hvfs8-0001NT-Bq for qemu-devel@nongnu.org; Thu, 08 Aug 2019 06:42:17 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:36397) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hvfs8-0001N4-5l for qemu-devel@nongnu.org; Thu, 08 Aug 2019 06:42:16 -0400 Received: by mail-wm1-f66.google.com with SMTP id g67so1917730wme.1 for ; Thu, 08 Aug 2019 03:42:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=NmJ3eps5Ts1N2alhuQJtr/+FRRwMkXlVVq5DbYD7hSY=; b=Ilge5fYn1bwRmVRmwTOOl4D/DiEL7+DZ5yuMujGzB6HFhX39JpnZw4YiAA4Utkd2ap 0E5dav3Rface4MdVPYuTrU3EmVq+hKOYLvZkccWhgcYCq1NyOHZBGyR3ie+cHp2iNHkb GQML4QjTgHBvXrHwF3mZXe+NhQeuGJteC7UNIllTQsnY0OYt2vjU6cqmRVrziFzQ9rmR OCkiBa0xyVh+eOVs+dzLSDT0NdFxtePfSkpKB6dtYN2gl9JoOBQv+ce7p8jVKi1UoKiG EYdSAfniestmJx8H8nPVAhfsVwV/Hg1bWrxvNgo8nkzBkiUQh3bbpCy4TP73b5zhs2tC 2PWA== X-Gm-Message-State: APjAAAVLqGgiM1+qMEMTRKKVrf/HZm3qw5ht3wGXxVPXjKK5jgUDRy3M nA2rzfn54OaR2aYsZkCaVrM7ZQ== X-Google-Smtp-Source: APXvYqxcFy09JTRYMuL0X1K5KZS5LK5wAyPoKw1CC4HvHClMXXMfo8PiNCTuobe/sjrA2gKFqf/z8Q== X-Received: by 2002:a7b:c928:: with SMTP id h8mr3738781wml.93.1565260934931; Thu, 08 Aug 2019 03:42:14 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:b42d:b492:69df:ed61? ([2001:b07:6468:f312:b42d:b492:69df:ed61]) by smtp.gmail.com with ESMTPSA id v12sm80338516wrr.87.2019.08.08.03.42.13 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Thu, 08 Aug 2019 03:42:14 -0700 (PDT) To: P J P References: <20190808063340.23833-1-ppandit@redhat.com> From: Paolo Bonzini Openpgp: preference=signencrypt Message-ID: Date: Thu, 8 Aug 2019 12:42:14 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.128.66 Subject: Re: [Qemu-devel] [PATCH] scsi: lsi: exit infinite loop while executing script (CVE-2019-12068) X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , Bugs SysSec , QEMU Developers Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 08/08/19 11:48, P J P wrote: > +-- On Thu, 8 Aug 2019, Paolo Bonzini wrote --+ > | I am not sure this is worth a CVE. > > True, it is a low one, as QEMU consumes cycles on the host. A guest that runs an infinite loop would be an easier way to do that. I suppose this one also blocks the monitor, but then "kill -9" is always your friend. :) Paolo > | The kernel can cause QEMU to break, but is there a practical case in which > | an unprivileged user can do that? > > QEMU does not break, it keeps running in interruptible sleep 'S' state. > They've a reproducer wherein guest does mmio calls to trigger the issue.