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=-7.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,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 B49DBC433E6 for ; Thu, 28 Jan 2021 08:57:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 781BE64DDD for ; Thu, 28 Jan 2021 08:57:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232151AbhA1Izu (ORCPT ); Thu, 28 Jan 2021 03:55:50 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:24484 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232272AbhA1Ip3 (ORCPT ); Thu, 28 Jan 2021 03:45:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611823391; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hvtYOjdDfkZyk+lFGoUR0j8cdav/9WreRA8ZjtvAe/E=; b=aq11F+aKjJmltl/6mE+VbDfzDj0YYzA+eJOjBDpZMx5gy/9/aLBRg2h+c96/b26AZB8K23 CAxDRw9WnW33CQbTSBi0M1d1ZeulxCYyxq5kGWtGMnJu7Vg1/tXJCoqgdklB28SWCvcFZ9 sw7HyTkd0w8ASTOWTkOSXoKoxuPKkeg= Received: from mail-ej1-f69.google.com (mail-ej1-f69.google.com [209.85.218.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-330-JIRGo9ysORKU_tPEtVoxkw-1; Thu, 28 Jan 2021 03:43:09 -0500 X-MC-Unique: JIRGo9ysORKU_tPEtVoxkw-1 Received: by mail-ej1-f69.google.com with SMTP id z2so1869621ejf.3 for ; Thu, 28 Jan 2021 00:43:09 -0800 (PST) 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:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=hvtYOjdDfkZyk+lFGoUR0j8cdav/9WreRA8ZjtvAe/E=; b=AFiwvVhzmtcYh2lpyFqI4eSyx1KtP50VeZwvTDsHmbzKrBv9ZcaYSnoi5i/uXOJw1p i7zh48sQNCJyBP6ZLpm0MBv1xoBUqs7/e+WWNnP9GU9XKs3ctwL+73aJ0VkrxGjBFYyl vinSGVCaxwP7NX18phj8VOzEhNdtkjc04ujDfqw7QIuJiRaLMtBX40Dw54tAhAQcs1Wx m9UQhqvFTS/wwHfKA+08GJhOpdSjzF0DXuOKQdgxVUkID2jQLu1xBGQXxR/MMlBZ/rLn UZu+9T3QUl0BKBhsahRjYDKq4Aydl+Dqe4O8o6sP8S/spCTNB3BM6yCzQHskdL7ATxHl 0xDQ== X-Gm-Message-State: AOAM532Y+aaNy2IgGW7AVc4dDC6F528hLgpsRlzi2qJPpna67zoamelA Z3IQGgpm9CWo6ogbI1MmyZQl0e7uBnfsPTjCD9WeWE8DGgfIDHbglPBsac0W0i+rswtTLNlfHnI 0LzXwpNuY6nYTTRrRHTKok+Ja X-Received: by 2002:a17:906:d781:: with SMTP id pj1mr9602417ejb.329.1611823388326; Thu, 28 Jan 2021 00:43:08 -0800 (PST) X-Google-Smtp-Source: ABdhPJz1a78u8FKvTZXcVbcIA+2MiZd1VLUiatKlWwSCjuWctKG+Uxffs2RgHxBspXvhfk93fwJVgg== X-Received: by 2002:a17:906:d781:: with SMTP id pj1mr9602401ejb.329.1611823388180; Thu, 28 Jan 2021 00:43:08 -0800 (PST) Received: from ?IPv6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id qk1sm1931282ejb.86.2021.01.28.00.43.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 28 Jan 2021 00:43:07 -0800 (PST) Subject: Re: [PATCH] KVM: x86: fix CPUID entries returned by KVM_GET_CPUID2 ioctl To: Vitaly Kuznetsov , Michael Roth , kvm@vger.kernel.org Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , linux-kernel@vger.kernel.org, Michael Roth References: <20210128024451.1816770-1-michael.roth@amd.com> <87a6st31c6.fsf@vitty.brq.redhat.com> From: Paolo Bonzini Message-ID: <304bd6db-4c67-a4bd-3b79-74c0474edefa@redhat.com> Date: Thu, 28 Jan 2021 09:43:05 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <87a6st31c6.fsf@vitty.brq.redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 28/01/21 09:36, Vitaly Kuznetsov wrote: > This is embarrassing but I have a (possible) excuse: copy_to_user's > argument is 'void *' so no warning was produced. Surprisingly, no test > caught the breakage. Thanks for debugging and fixing! So who writes the test: - the author of the buggy patch - the maintainer who failed to spot it - the poor sod who fixed the issue ? (Just kidding, it will of course be either me or a fourth person :)). Paolo