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=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 54C75C3F2D7 for ; Thu, 5 Mar 2020 20:50:45 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id A31F820870 for ; Thu, 5 Mar 2020 20:50:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=tycho-ws.20150623.gappssmtp.com header.i=@tycho-ws.20150623.gappssmtp.com header.b="KDxK8K+k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A31F820870 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=tycho.ws Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-18086-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 22454 invoked by uid 550); 5 Mar 2020 20:50:38 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 22422 invoked from network); 5 Mar 2020 20:50:37 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tycho-ws.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=w+OmpmqF00gA9FGrIOBgOQ4xJK5bBYcQsPPrukOSwVQ=; b=KDxK8K+kqZFSM1Ls+1Z0akgc9T4awAnlofZt4GX5sz88Iuz0zEEUi1WzniegxDnLj+ IS1GPjWA/SAvmrYB8Nzmg3XSYo/yEzalY6+n+VCP8HTtmEQIevxUDAi851sC5TQqgJfI S7DFe4x2GzhL3UBSpzu4EFnnaxIxFW8gDyUjp3ZYRHDX2RaLBEyoXyN+PPYV7M22mfb6 BJ9UUM0kLxwlvuBiIIqKEgfVeYKfGwXuplT0NZbjKSdvh4/zyRawcJHG5LzVeNsKSu4E vcWE/Y3R23XFhVkIgze/8lxDatDTgcbiNAhzYdO4NVDiqhHzwDD7EgX/rU+kcZzmn0UB UtuA== 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=w+OmpmqF00gA9FGrIOBgOQ4xJK5bBYcQsPPrukOSwVQ=; b=ufgUPmERU7Jw09T67qbEQVKCpgxRM8KLLsckKhqdYfgAXiSc5x2cODNxkzjnbvMDMY rNhT/0HWrbB8gwYP5SVovE9DDzmpbPe4HoWanNTt6eLrmKYklRZsDJ6IgLRbdLa/7b1j kZtLNjn4YySxRE3s5068pL7UvniiVaQRlfcHg7pXTzHC12Nrz8tDvg1+PHvDQPdQsXte nJ2Fv5vT3jewrEYANcT3zO227VZCVLWXZuNChYV8xPqo71ZcqlMJGfWNGl7ZTWf8O5aM +MRkSsqcbIXJ6lGTWqKD+UNSmKj/Ahf5RM285r/6H5e1cCeizGnrrSSMIutG1JPYABwp QkWw== X-Gm-Message-State: ANhLgQ1yk57WSww3V3USZlLO7nShX2GGDucNcT4lD4s9g5E5xsXgoj7Q l43m2+DuxHNLyKASSaf30N4snw== X-Google-Smtp-Source: ADFU+vvTM/Al7Umv0rKSgmlF123yGh/rmK8r19ETS904XycHgtDzdV5FSkZzB8KqPw0qqLne1Lpu4A== X-Received: by 2002:a25:664a:: with SMTP id z10mr89446ybm.461.1583441425906; Thu, 05 Mar 2020 12:50:25 -0800 (PST) Date: Thu, 5 Mar 2020 13:50:19 -0700 From: Tycho Andersen To: Arvind Sankar Cc: Kees Cook , "Tobin C . Harding" , kernel-hardening@lists.openwall.com, Michal Simek , linux-kernel@vger.kernel.org Subject: Re: [PATCH] microblaze: Stop printing the virtual memory layout Message-ID: <20200305205019.GB6506@cisco> References: <202003021038.8F0369D907@keescook> <20200305150503.833172-1-nivedita@alum.mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200305150503.833172-1-nivedita@alum.mit.edu> User-Agent: Mutt/1.10.1 (2018-07-13) On Thu, Mar 05, 2020 at 10:05:03AM -0500, Arvind Sankar wrote: > For security, don't display the kernel's virtual memory layout. > > Kees Cook points out: > "These have been entirely removed on other architectures, so let's > just do the same for ia32 and remove it unconditionally." > > 071929dbdd86 ("arm64: Stop printing the virtual memory layout") > 1c31d4e96b8c ("ARM: 8820/1: mm: Stop printing the virtual memory layout") > 31833332f798 ("m68k/mm: Stop printing the virtual memory layout") > fd8d0ca25631 ("parisc: Hide virtual kernel memory layout") > adb1fe9ae2ee ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()") > > Signed-off-by: Arvind Sankar Acked-by: Tycho Andersen