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=-0.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 6E609C433EF for ; Sat, 18 Sep 2021 09:55:14 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (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 0540F60F70 for ; Sat, 18 Sep 2021 09:55:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0540F60F70 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmx.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94.2) (envelope-from ) id 1mRWx0-0001Tj-I9; Sat, 18 Sep 2021 05:48:02 -0400 Received: from mout.gmx.net ([212.227.15.19]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mRWwx-0001Sj-J4 for kernelnewbies@kernelnewbies.org; Sat, 18 Sep 2021 05:48:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1631958455; bh=rGVbN6Q9vbH1new6gzrfww3clqESJQPpnmT6Dhouahc=; h=X-UI-Sender-Class:Date:From:To:Cc:Subject:References:In-Reply-To; b=k1M+eEP9dFo8CZSsRhF/U8YHjNGe1A9AlxuTJlkcXYAgmMrRUHT4x6RkKG7LUsKNQ JmQGTAYOodK+iwowJqXdh6u/zwDUM31OhH04xiqaTeL1wofCSbNgsQFf9aEvjP1TpR DzSFcCNqCsep1gcAJ5VmszrAZRXXGtvm7wFc3cRY= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from titan ([79.150.72.99]) by mail.gmx.net (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MoO6M-1nFwi62eTY-00opRd; Sat, 18 Sep 2021 11:47:34 +0200 Date: Sat, 18 Sep 2021 11:47:28 +0200 From: Len Baker To: Valentin =?utf-8?B?VmlkacSH?= , Kees Cook , Bernd Petrovitsch , Random Guy Subject: Re: [Clarification] writes to kernel addresses that came from userspace Message-ID: <20210918094728.GC2941@titan> References: <20210912162030.GA4692@titan> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210912162030.GA4692@titan> X-Provags-ID: V03:K1:PGUlrxl+E56ihe+GPO9Y1LrOcJjGeBbRt2qQHooqp4lLX7QWz6G kTtFJ6T3zMlPAG+x8YnZ+PNNPvC9eVYXUvj8qgBIoJLt5V8EeDNNRlu3w+1sa/b3ot3TVSd 1ysTelKIk1dx7mWx5LQk92vdJoUHzQoyQDm+e+bS6rU9iXkmsAX7k8w4VgI8UHr+ok7oKa8 yq0rSaCUymlSAbhUAMc1g== X-UI-Out-Filterresults: notjunk:1;V03:K0:irk1oy8Y+fI=:b6n4VyBIAUyyz6dJXwtrrI hVuXCft2O/N7R1s09fQmdGd+Y9D/TEAEniMleB5Db7yWFReBnt0R009MMB9GWjpvXih0uIioD vTpj/WZHJhjy8W52a9ffabaQ+JIfM4f26RmlO/5bItNSdBEseC9QKDGL/4tBRmUjVop6u4YnQ SHuMqo7tUOBi1KdHNcueW0/Jjb/2wV0YRYLi0DxSmIU8kb+VO5SdNKG1LqLdkxsHBZSwTx+FH x08WSyCiikTjOrxziks4xeHnRP/6Fc8XqDnfIuWOYj3fO843NHf5U6RuKajkgKO8rOxoOwaaO frU86+dkGn4EwtZ6A5tZeYEVAnZEOxtvo0p9fTKHa6D6D1+8eTXXp6oy/G5NTiyN5JPc1pOwq T/JTS6QrCjJ4f2mBmY5LWedSyg16ORi+Dp/oTDblfIaW1kRY8p4sfWWo9cls52AJJUlPxsnp+ 0F7gxIPnb1W/PYO1M2+BIP166fvpIuZf5UDlWCmZKNFZPS6GbCIlt5z683BhkjnkDzdQH+ejK UtbKkFFFADlLhTeQwXuUxwITztLhkz697kBqj2mGiUV10yNbNk1QlBh5LiXQBsqNFUDCvMrCm pif8psedAMZrPYVwKTY1V1TyNwNEbJknvFa6Kr+RNycAUnqHhJQFtKKsS4fLvcY9mc7C+rVPr a8VQf90Gz4dusMwenwX84pTFDFPS3lpqYXNnHERFjcPw0paE4xvDJPJUtwaSEFBdaLFuvUfBX hfCMixmpAGYTYy2x+EFuqDl1GA7ayHFHVId/n1ULc7naFBaxaA+LEsXXZ5BRAnGd6LEC0JZOW k6YKLkwM9mpv7FvowvrzMtU/10kZfSRHyWqjVFDp3Hi2gdNaI1kHUZkzaBkxG9yEOWncrmHCE /YHe8L281zVlGAuPSAnuq1N8VDUf8LhY8MYVxwN8x/V+sWc+vqVb3TIKKQiB+YYEjPodD1+cA /Srgvhe7QZUPqqd/3QGT6R1giEk0fGF/zxsTmnITGFOWNl12dqzXqnrYnE/RAXI7/yoCupiTe D/btf4wuEPkdz8eEQXJX5xksqouBCuEhis/wZifTOV8TT0aE/nynmmHnsi4vYL0sv8E3dFwwd Qp/7mOjXHVqVdg= Cc: "kernelnewbies@kernelnewbies.org" X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org Hi Valentin, Kees, Bernd and Random, Thank you very much for all the info and advices. Now, things are more clear to me. Thank you all again for your time and guidance. Regards, Len _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies