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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 00101C433E5 for ; Tue, 21 Jul 2020 21:17:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D05F120720 for ; Tue, 21 Jul 2020 21:17:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595366235; bh=TzLWNM1LD+L4U5bRicVrwK2fS/0AiwZeVwE8H6XOFsg=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=lOeWdxLXQqNKWQ9A3i+4kVQz3Xiy2pFbmzyntUBV/N69BeVlIkWxZ5wX3tTJoDRkD J7lz4V2CNM4OydNFB5OaDGK22XT+Xpe/GC8p55stUavn3u6VTlJOaH3UbUM//f6R9Z pwMBCmwSgaj+yy+iynZ8qFxpmzuC0vEchnHoKOVE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731490AbgGUVRO (ORCPT ); Tue, 21 Jul 2020 17:17:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731335AbgGUVRL (ORCPT ); Tue, 21 Jul 2020 17:17:11 -0400 Received: from mail-lf1-x144.google.com (mail-lf1-x144.google.com [IPv6:2a00:1450:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81F41C0619DB for ; Tue, 21 Jul 2020 14:17:11 -0700 (PDT) Received: by mail-lf1-x144.google.com with SMTP id u25so130126lfm.1 for ; Tue, 21 Jul 2020 14:17:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+yHNt87DNg06st5Xvcn/k5gkCvt7pppBHpC/nXo6E+w=; b=eoUGsPTaLCi+OvvgDt1WVz1j91QiOdJd4Oq2XThqlHQuBV2m/mmlOa1jj8LR6xjFci eYqT7+fgO3LWo4uXASHbEhi+l8B4qwpGiW5Q0l23MVEVF02we1Ji9ygGjb3FLO+FP1Mj t/a+zOg0W3Se1DdWUn92n1LdvJUR2fKNauo4I= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=+yHNt87DNg06st5Xvcn/k5gkCvt7pppBHpC/nXo6E+w=; b=JZtn6cyOkO2jlH6W/j/jiIkIqZEeDb9QGMbPgQPEmdLKIsTu9u5sVyOIpUlSDASRQF Lmmf9Rf3S5Ifc3dvTtYaSldCzEOak6yFh9IqrIBfaOiNd245DtwTV9IE4yXuelKnO4dl VFxnTLRByX6buq6woRisapwFgiVjNkamxrQK5CSPESmDDk1/f/Me8gGSynRCvYmeQiff DuMXJFraJMHtokuh0i8wzKW4rhm7YFOBOr1CYs27a/v69V/P4lUlgnOdPH9ptfT4nFys Gl9ROkq6ttQ1d2LMrJewanhicqq/lE189oqD00U8SgKh49RVgBbiIHalUaqyVwkezj5H Uh8g== X-Gm-Message-State: AOAM5313+UAg2EKJt9hWjRccx8JfaoFCjM2hIH1CmmJDTt2dhJN+uHsd 2O2BJOsBg8rUh5A5sSiA7jYunehPSmU= X-Google-Smtp-Source: ABdhPJywtRqK9QVdoVbpVWMgdjx5Vh5EBxtJE5NgJnLrlrQSOXhOu7t3KInsbsO+uDmjmw4YD+sEJg== X-Received: by 2002:a05:6512:3193:: with SMTP id i19mr10407230lfe.183.1595366229639; Tue, 21 Jul 2020 14:17:09 -0700 (PDT) Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com. [209.85.167.41]) by smtp.gmail.com with ESMTPSA id m14sm6846663lfp.18.2020.07.21.14.17.07 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Jul 2020 14:17:07 -0700 (PDT) Received: by mail-lf1-f41.google.com with SMTP id y18so98006lfh.11 for ; Tue, 21 Jul 2020 14:17:07 -0700 (PDT) X-Received: by 2002:a05:6512:2082:: with SMTP id t2mr5445624lfr.142.1595366227470; Tue, 21 Jul 2020 14:17:07 -0700 (PDT) MIME-Version: 1.0 References: <20200721202425.GA2786714@ZenIV.linux.org.uk> <20200721202549.4150745-1-viro@ZenIV.linux.org.uk> <20200721202549.4150745-4-viro@ZenIV.linux.org.uk> <20200721211118.GB2786714@ZenIV.linux.org.uk> In-Reply-To: <20200721211118.GB2786714@ZenIV.linux.org.uk> From: Linus Torvalds Date: Tue, 21 Jul 2020 14:16:51 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 04/18] csum_and_copy_..._user(): pass 0xffffffff instead of 0 as initial sum To: Al Viro Cc: Linux Kernel Mailing List , linux-arch Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 21, 2020 at 2:11 PM Al Viro wrote: > > > > But I didn't check. Maybe we don't have anything that stupid in the kernel. > > I did. So then the commit message really should have said so, I feel. That would have avoided the whole worry, and made it clear that it's not an issue. Linus