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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 C7B6BC64E75 for ; Fri, 27 Nov 2020 09:29:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 701ED206D9 for ; Fri, 27 Nov 2020 09:29:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XZbRNFvM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726602AbgK0J3L (ORCPT ); Fri, 27 Nov 2020 04:29:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725854AbgK0J3L (ORCPT ); Fri, 27 Nov 2020 04:29:11 -0500 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5C03C0613D1; Fri, 27 Nov 2020 01:29:10 -0800 (PST) Received: by mail-pf1-x444.google.com with SMTP id b6so4030157pfp.7; Fri, 27 Nov 2020 01:29:10 -0800 (PST) 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; bh=RD6BXGXgO5CkMS1mHQzAuQIHEBQtva6qzduS8cHE1ak=; b=XZbRNFvMHGzqw3bLgf59ondA9kkygmg6jqtpAFk94WvpJxvJeldgSS5qJBzJ7C4lzP qRp2k6/gop1vLoyCr9qV7cNTpTTYBfEDe1zkGvA9eTJZRzatLurVE/APAWoXPYi/kBR4 htmYkZF00nVDv/43zPiXOzETimbCd3M/EMLKx0VaxTeHfzreYrmWEcY1r6ZTztlDqk7f yTkxytMYmyiXtA8nUokbc1LRilU6msBzwo7q0rB1hqwLqg3zifZCzQIc/Lyxp8HhGZoP CRapDt2mr1c9OZQE39C2GAYex+HKILxTVbXlsZOOh70EDma1OswVCDZlkDX+kdIES4ZI 3DPA== 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=RD6BXGXgO5CkMS1mHQzAuQIHEBQtva6qzduS8cHE1ak=; b=FD8Ydx4psHR9fmKORn0mmxg1SPO7YiYOkjSSFXz3oKgu6uAOv+gdcEBi3Oi6pJcf1e anUuCe2grwIE2lHRIbJ08KHEXTyrnu67u0YoIBSEGfT0ry2FYNGhO4pzsadlAYqRyx2m Dk+cGRf1JFkpuzCWS6fW+MrzTH6T+idXjj/TxaokQqxUh4bwe27jRVxemVpveGl8KBKj NYcZal02BrSo4PMuziZ4SQBotJjhBS2uI5ss1h2HwvO+C2iN3rkEISny56B78QPaFZey dRCM4HfssmwGI/8tyQmsTP9ugaa+cS0oLbfPKnE+a9c/nuFB0DQoH/sMsC1zV5v2QShy IXMQ== X-Gm-Message-State: AOAM533QSy34aMmnqi3i8luxTJJmtm9oIS4KjvsSdnhDlTV+cJq9tGX1 qtU4ZCBl0uEs0LCoiEMaMug= X-Google-Smtp-Source: ABdhPJwKpcDRzKgCp6wpeBmbZQrSoxpmlCTjlyLLL8vBlwesx5hY7wWA+FRvpV0orAH0nIbVhvXmvw== X-Received: by 2002:a17:90a:c214:: with SMTP id e20mr8884618pjt.212.1606469350377; Fri, 27 Nov 2020 01:29:10 -0800 (PST) Received: from localhost (61-68-227-232.tpgi.com.au. [61.68.227.232]) by smtp.gmail.com with ESMTPSA id gg22sm8983689pjb.7.2020.11.27.01.29.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Nov 2020 01:29:09 -0800 (PST) Date: Fri, 27 Nov 2020 20:29:05 +1100 From: Balbir Singh To: Yu-cheng Yu 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 , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu Subject: Re: [PATCH v15 00/26] Control-flow Enforcement: Shadow Stack Message-ID: <20201127092905.GB473773@balbir-desktop> References: <20201110162211.9207-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201110162211.9207-1-yu-cheng.yu@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 10, 2020 at 08:21:45AM -0800, Yu-cheng Yu wrote: > Control-flow Enforcement (CET) is a new Intel processor feature that blocks > return/jump-oriented programming attacks. Details are in "Intel 64 and > IA-32 Architectures Software Developer's Manual" [1]. > > CET can protect applications and the kernel. This series enables only > application-level protection, and has three parts: > > - Shadow stack [2], > - Indirect branch tracking [3], and > - Selftests [4]. > > I have run tests on these patches for quite some time, and they have been > very stable. Linux distributions with CET are available now, and Intel > processors with CET are becoming available. It would be nice if CET > support can be accepted into the kernel. I will be working to address any > issues should they come up. > Is there a way to run these patches for testing? Bochs emulation or anything else? I presume you've been testing against violations of CET in user space? Can you share your testing? Balbir Singh.