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=-2.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 CE459C43219 for ; Sat, 4 May 2019 06:57:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97E43206BB for ; Sat, 4 May 2019 06:57:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qpFDpgQF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726838AbfEDG5G (ORCPT ); Sat, 4 May 2019 02:57:06 -0400 Received: from mail-lf1-f68.google.com ([209.85.167.68]:43786 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726529AbfEDG5G (ORCPT ); Sat, 4 May 2019 02:57:06 -0400 Received: by mail-lf1-f68.google.com with SMTP id u27so5595275lfg.10 for ; Fri, 03 May 2019 23:57:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=h6HmZn6f8FxosixHM79+I4jh/Dsytwl+YRpeHiqpaiQ=; b=qpFDpgQFfRqt2vxujIdX/p70aXZ406OKP/jAnakQQVsYxkvZwBSq/wkxlu88c8Gxpi nolmmaCmD8qxmtxRTmC+Kv0AJ9uFNP1k8HnhCbZvz8HZ0GytEfNkwiiX6L4mLZFim9be kZjYCGgATWqQw8ie66Tp6JWslFRseEZIseZMqmcb6r0gv/YCbauJj99gyB5lDw6WtB8W MUqq8r/tftKjTemN75MQRUECBHYViXtQY/eCJ+I4CJSPP4n9PM9oH2jAuEvn9osAYcV4 FFCZxYSq9AOhEvBJe5vnrmhoWJ4rOAD5LpXOizFgrK7ZP6uOtCV/s8z0cWNCBBLyA98b 9xpA== 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:user-agent; bh=h6HmZn6f8FxosixHM79+I4jh/Dsytwl+YRpeHiqpaiQ=; b=SL6xHYgb1pxP1CMRofyKJJDM2dng9+Bu0Gn/DVMMYcBtGPGhyvg6p7jdiG8xGGly6X NOvIGZhLprM+eRYKTYVIgwi78dsmNaTElBqKDXEUitzgL05nUjDLESAsFtYYaTSpWbhr Ycrmw1A7eCJbrd9GPsYN/ukDaIDMt20s83Qc6cbt8UbDw95TzgpJf3W4Z7S/BXJU5EQA c7FqsmlVqwswUPtRMH+B6AbD+Ybp2SN0iA7u0QqtqyFy70V50kF9KUH2D6vHhNaoqG63 fB61ExSb1iW++I6xGZKgrTWxpGgU3EkZC06TT8EX30v5l2ZYwEjzSJ9JiU3Cilm+ZtTl XuFg== X-Gm-Message-State: APjAAAWyZ0ECZx5KgcRN+BjZBHoLgnh40sLcx4bUywklpqTliaX4lz3q j4Sm+AwsHZIbymFn4QlRoQ== X-Google-Smtp-Source: APXvYqzUEusID7J47sLUJCdrU82VZBUEcGrS8t+rF4RNSicmQguPbQr+C6tG8A7H8xKVlEmlTEArzQ== X-Received: by 2002:a19:7d04:: with SMTP id y4mr7321456lfc.153.1556953024592; Fri, 03 May 2019 23:57:04 -0700 (PDT) Received: from avx2 ([46.53.254.98]) by smtp.gmail.com with ESMTPSA id c19sm791498lfj.96.2019.05.03.23.57.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 May 2019 23:57:03 -0700 (PDT) Date: Sat, 4 May 2019 09:56:59 +0300 From: Alexey Dobriyan To: Joel Savitz Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Masami Hiramatsu , Waiman Long , Mauro Carvalho Chehab , Kristina Martsenko , Andrew Morton , Cyrill Gorcunov , Kees Cook , "Gustavo A. R. Silva" , YueHaibing , Micah Morton , Yang Shi , Jann Horn , Rafael Aquini , Michael Kerrisk , Yury Norov , David Laight Subject: Re: [PATCH v3 1/2] kernel/sys: add PR_GET_TASK_SIZE option to prctl(2) Message-ID: <20190504065659.GA4156@avx2> References: <1556907021-29730-1-git-send-email-jsavitz@redhat.com> <1556907021-29730-2-git-send-email-jsavitz@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1556907021-29730-2-git-send-email-jsavitz@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 03, 2019 at 02:10:20PM -0400, Joel Savitz wrote: > +/* Get the process virtual memory size (i.e. the highest usable VM address) */ > +#define PR_GET_TASK_SIZE 55 TASK_SIZE is in fact the lowest _un_usable address. :^)