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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 50F3AC433E0 for ; Mon, 6 Jul 2020 01:21:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 318F82070C for ; Mon, 6 Jul 2020 01:21:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="F4CXDtLy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728595AbgGFBVm (ORCPT ); Sun, 5 Jul 2020 21:21:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728459AbgGFBVm (ORCPT ); Sun, 5 Jul 2020 21:21:42 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C60EC061794 for ; Sun, 5 Jul 2020 18:21:42 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id e18so17634366pgn.7 for ; Sun, 05 Jul 2020 18:21:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=8yvQ48jePvSkpNEOiKywOlcwgJYBDKGMGlLh7bQcbxY=; b=F4CXDtLy5SDTAqh+FkUui2v2kyxo6W8b0CK2JM9q/ZhluIHz4NdY3uuU/a39UbCpq9 +mGWMUF4RxHkOMVo59KHhJI0O1d3+/IulpLFBNzxLysv74yl/AACzAi7ptOpuBxrIUBS yPa303MHMZuFP0EpmuF1Db9zI3LVAp0BCyIL4= 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; bh=8yvQ48jePvSkpNEOiKywOlcwgJYBDKGMGlLh7bQcbxY=; b=WVzMdRwcZbk31m2c3g+I364f8lfNCCbwxNmDjE4ci5SGbvAQJxPgUM7adM1QZL8wRp 8UZxB8Gt6JQvuac9/zrzA6WDKbdyLOdSl6oYFVwgdcZZlZLrJ50zyT9kMeYwNxcigjve RY/Xkzue8mZtGuyd/seRJ/zRMFGJJ8BkFwrq6QTWOWr/adw6KHDcszSmjJPw4KkPBxxz Jd5iJngR9XY1YFDFCm2Gm0JgLPpMD66SwLv9E1EEPRZCJAFIYsyBw5i32vrwlWDtQjh7 qoOvSDhrZwUKShvR+KdFp8SkTi5cO+TXitUuV2Jv8ncZm092vtZ2AlFm0BiYUWrJicqO a1Eg== X-Gm-Message-State: AOAM53371JOdBHk/rNR/y+DTZiTbwI9Nc/f1je7BT7S+obDl31M9sEal nipNvMSlLXtOJQiDP/pJ6Vg+ug== X-Google-Smtp-Source: ABdhPJw2aS5EG4tZqSfuBN9OitoGgrKm2rWv1SK6aPwvfZgPjFkoOEENMcwFcvlj4KcxXQ5msr5oNg== X-Received: by 2002:a62:7f55:: with SMTP id a82mr33627421pfd.61.1593998501873; Sun, 05 Jul 2020 18:21:41 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id c15sm17344475pgb.4.2020.07.05.18.21.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jul 2020 18:21:41 -0700 (PDT) Date: Sun, 5 Jul 2020 18:21:40 -0700 From: Kees Cook To: Guo Ren Cc: linux-riscv , Linux Kernel Mailing List , linux-csky@vger.kernel.org, Guo Ren , Ramana Radhakrishnan Subject: Re: [RFC PATCH] riscv: enable per-task stack canaries Message-ID: <202007051820.DABE7F87D7@keescook> References: <1593958397-62466-1-git-send-email-guoren@kernel.org> <202007051336.C9EA0ECF65@keescook> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 06, 2020 at 09:01:51AM +0800, Guo Ren wrote: > Yeah! :) I just want to show you, how about the format: use tp in gpr > to do that. The format is similar to arm64. > > tp is the task_struct point in riscv. Sounds good to me, yes. Thanks! Is there anyone looking at the GCC and Clang sides of this? -- Kees Cook