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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CB7EC4332F for ; Mon, 3 Oct 2022 18:12:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230036AbiJCSL6 (ORCPT ); Mon, 3 Oct 2022 14:11:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230009AbiJCSLz (ORCPT ); Mon, 3 Oct 2022 14:11:55 -0400 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 528B436DEF for ; Mon, 3 Oct 2022 11:11:47 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id u24so3398675plq.12 for ; Mon, 03 Oct 2022 11:11:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date; bh=zRpyaE88IPezVOhw7iDOjlsRbtSXUjPIrXfaa3Vd3zo=; b=PWArMU3a7kjBwWCA46WWP4zzfx02BDKVm4Jb2Z339yWHDI+W7ISC2qQN51aA/T1cmp 4qlyLW4V3YZ9vPNyyr7J2q4Gwp/zmqjoyGzZ+I0HRBmpyvbyNFV3jXd6BlreiAM4z9sc 3sAwUQEoaOtYanSqbEquaqOPgyq+F9eL1RUcI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date; bh=zRpyaE88IPezVOhw7iDOjlsRbtSXUjPIrXfaa3Vd3zo=; b=BIRACVFpFCNcJ6mGdL6eyoE7PCiP419xDWrK8jwHcb+RDBF17GtdccqTlU7rks8zuw 37FjSWGOtkyeqrdn+NloTQ/x4g8aGBQJb2XdBfomD00GpnyKKx2oxabZFP30S4VlkuYg UBAYS5F2o7VF3sAvJPzaI2ua3JF7upOkGBblujGpfY5mqPbnSp3gGqzp+/wlttBiBLal 5ga83xuYW3u38d5jMHcdjBNlRqpVjSDHTHwFI3WXKvL/etEz1cT6c0jYSNCte+7U3Cie +1pHZ06EfNoy5PAW8Dn6LBuS5cXahnJiLFIv9Z2MGtHa5SgRXqgK3lge1GdTivoZ7EX/ v3XQ== X-Gm-Message-State: ACrzQf1d/vc6f67UTMHqHxeToHA1OA8SBjmo4rirOJNN2cfLHhVaxpLC 2CAv27ObArwOXvp1jlWdLmubZA== X-Google-Smtp-Source: AMsMyM5XAU3N6BrociuiRhaNddnUYSLkzWBAzwcCZoX/da8Tx8mE88aWLj364HqDnnvojMSluB2wpg== X-Received: by 2002:a17:902:e54b:b0:178:75b9:f1e9 with SMTP id n11-20020a170902e54b00b0017875b9f1e9mr23501376plf.104.1664820706785; Mon, 03 Oct 2022 11:11:46 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id a15-20020a170902b58f00b0017849a2b56asm7513913pls.46.2022.10.03.11.11.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Oct 2022 11:11:46 -0700 (PDT) Date: Mon, 3 Oct 2022 11:11:45 -0700 From: Kees Cook To: Rick Edgecombe Cc: x86@kernel.org, "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H . J . Lu" , Jann Horn , Jonathan Corbet , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V . Shankar" , Weijiang Yang , "Kirill A . Shutemov" , joao.moreira@intel.com, John Allen , kcc@google.com, eranian@google.com, rppt@kernel.org, jamorris@linux.microsoft.com, dethoma@microsoft.com, Yu-cheng Yu , Peter Xu Subject: Re: [PATCH v2 13/39] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Message-ID: <202210031111.01D879A@keescook> References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-14-rick.p.edgecombe@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220929222936.14584-14-rick.p.edgecombe@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Thu, Sep 29, 2022 at 03:29:10PM -0700, Rick Edgecombe wrote: > From: Yu-cheng Yu > > To introduce VM_SHADOW_STACK as VM_HIGH_ARCH_BIT (37), and make all > VM_HIGH_ARCH_BITs stay together, move VM_UFFD_MINOR_BIT from 37 to 38. > > Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook -- Kees Cook