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=-11.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 31181C432BE for ; Tue, 27 Jul 2021 15:46:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 15BDE61B4C for ; Tue, 27 Jul 2021 15:46:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236995AbhG0PqS (ORCPT ); Tue, 27 Jul 2021 11:46:18 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:38437 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229537AbhG0PqR (ORCPT ); Tue, 27 Jul 2021 11:46:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1627400776; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qyu2Y2TRrxflVv9Re1ddIxikd/FHNJ3gk/I5zZBEQ38=; b=I+HLilGqJ0edziQMxkDK0r7+lFWLygv/kgqIq5UhNf2HLo6bvTJu9EbUuzFKxD9PTCo8WK LKuFpwPxzHrFbhKCxZuH/nKj3Bs+L8sfX6N4tdbFt6IwtMJK1bVCEmuzsh2BH3PDphwYy4 THozO+iCk6y/Ywi7uOr5QBrWKQ1yFyg= Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-374-fEjydgYrPe2GwoTPPkXxqQ-1; Tue, 27 Jul 2021 11:46:15 -0400 X-MC-Unique: fEjydgYrPe2GwoTPPkXxqQ-1 Received: by mail-qk1-f198.google.com with SMTP id u22-20020ae9c0160000b02903b488f9d348so11845128qkk.20 for ; Tue, 27 Jul 2021 08:46:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=qyu2Y2TRrxflVv9Re1ddIxikd/FHNJ3gk/I5zZBEQ38=; b=HJI2xY2a+cuMiUt5GcixsKUVAwxek9LjAFG1OGcnRyD/39WDqDkX40XjIJSmhQ5eCS 8DoRyihCv9Q5PA8BIwvP6ZRUzYez7t1GY3Q6WYLnRDBJUiUBJWPtRK5L+ejlbWA3QMDG BKpifo4Y9nhjW9ulBjSE3IzEiUBNoF4My3aHEuT+8UWNaBU2zj5P9NhnH90S6UMVz53a +gIF1fcdYnXRpJeO5ABq7etNVuyerwDxFg5iq4ywrTVlvvVJP1yVS4mvKL8z7Y1N64yK q5ecP2t1lk4/KBF0TX9Ts/3id6s0tfNtM32mfYlCjcRO/3txrSvzW4CIhRdoymcgFSyP 4Szw== X-Gm-Message-State: AOAM5331n4pizu05fzP27PDD2PY0s3ZD34WvtW0AXEbSip1tUsgc+Fm6 i5HYBJp+5bR4Mb1S6E2NXYuTediCrI+wn3piWkZCo/QkVC8SpZK5h9b9/cVD+qqH/JgQRVKic+r 4vOWMFp9XPc4Z65uzXiGFzlUn X-Received: by 2002:a05:620a:1137:: with SMTP id p23mr23880574qkk.490.1627400775129; Tue, 27 Jul 2021 08:46:15 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzhTawW9W+VTgqHYhIOqH2k2b/KQYhF35BYDKPB7IDZDwwML1ltc1GzD2gc42Ak+yJCkznYwA== X-Received: by 2002:a05:620a:1137:: with SMTP id p23mr23880554qkk.490.1627400774782; Tue, 27 Jul 2021 08:46:14 -0700 (PDT) Received: from t490s (bras-base-toroon474qw-grc-65-184-144-111-238.dsl.bell.ca. [184.144.111.238]) by smtp.gmail.com with ESMTPSA id f3sm1570573qti.65.2021.07.27.08.46.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 08:46:13 -0700 (PDT) Date: Tue, 27 Jul 2021 11:46:12 -0400 From: Peter Xu To: Paolo Bonzini Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] KVM: add missing compat KVM_CLEAR_DIRTY_LOG Message-ID: References: <20210727124901.1466039-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210727124901.1466039-1-pbonzini@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 27, 2021 at 08:49:01AM -0400, Paolo Bonzini wrote: > The arguments to the KVM_CLEAR_DIRTY_LOG ioctl include a pointer, > therefore it needs a compat ioctl implementation. Otherwise, > 32-bit userspace fails to invoke it on 64-bit kernels; for x86 > it might work fine by chance if the padding is zero, but not > on big-endian architectures. > > Reported-by: Thomas Sattler > Cc: stable@vger.kernel.org > Signed-off-by: Paolo Bonzini Reviewed-by: Peter Xu -- Peter Xu