From patchwork Wed Mar 10 22:05:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu-cheng Yu X-Patchwork-Id: 12129603 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 2BB1FC433E0 for ; Wed, 10 Mar 2021 22:05:49 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B09C964FC9 for ; Wed, 10 Mar 2021 22:05:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B09C964FC9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 27B5A8D0237; Wed, 10 Mar 2021 17:05:48 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1B6F58D0233; Wed, 10 Mar 2021 17:05:48 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EFA128D0237; Wed, 10 Mar 2021 17:05:47 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0173.hostedemail.com [216.40.44.173]) by kanga.kvack.org (Postfix) with ESMTP id D77D78D0233 for ; Wed, 10 Mar 2021 17:05:47 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 9EFC35825 for ; Wed, 10 Mar 2021 22:05:47 +0000 (UTC) X-FDA: 77905347534.03.8C4ABB9 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by imf02.hostedemail.com (Postfix) with ESMTP id A97554080F61 for ; Wed, 10 Mar 2021 22:05:38 +0000 (UTC) IronPort-SDR: WRPFq5EQNIOz8lN8f1/oYVOPBSn5xYTlHhhTSxgq3vHlwKK8Ia+rKUwKr/se1Q5VZCilvfkn6V erbDAKOPexfQ== X-IronPort-AV: E=McAfee;i="6000,8403,9919"; a="208385061" X-IronPort-AV: E=Sophos;i="5.81,238,1610438400"; d="scan'208";a="208385061" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2021 14:05:44 -0800 IronPort-SDR: 2FbPucSrMwCiTmF2aHd6Sx25mwxBRgB62Yoa5dtz8+lF8KUMvdFlC4vyQ2BpUZ7A6s91c6SkI9 DzbLc6C8feng== X-IronPort-AV: E=Sophos;i="5.81,238,1610438400"; d="scan'208";a="410368497" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2021 14:05:43 -0800 From: Yu-cheng Yu To: 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 , 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 , Haitao Huang Cc: Yu-cheng Yu Subject: [PATCH v22 1/8] x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking Date: Wed, 10 Mar 2021 14:05:12 -0800 Message-Id: <20210310220519.16811-2-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210310220519.16811-1-yu-cheng.yu@intel.com> References: <20210310220519.16811-1-yu-cheng.yu@intel.com> MIME-Version: 1.0 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: A97554080F61 X-Stat-Signature: maxfq9c5qt5f5gqnm5iigyxh4nm4g6by Received-SPF: none (intel.com>: No applicable sender policy available) receiver=imf02; identity=mailfrom; envelope-from=""; helo=mga01.intel.com; client-ip=192.55.52.88 X-HE-DKIM-Result: none/none X-HE-Tag: 1615413938-325558 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Indirect branch tracking is a hardware security feature that verifies near indirect call/jump instructions arrive at intended targets, which are labeled by the compiler with ENDBR opcodes. If such instructions reach unlabeled locations, the processor raises control-protection faults. Check the compiler is up-to-date at config time. Signed-off-by: Yu-cheng Yu Reviewed-by: Kees Cook --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2c93178262f5..96000ed48469 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1953,6 +1953,7 @@ config X86_CET def_bool n depends on AS_WRUSS depends on ARCH_HAS_SHADOW_STACK + depends on $(cc-option,-fcf-protection) select ARCH_USES_HIGH_VMA_FLAGS select ARCH_MAYBE_MKWRITE select ARCH_USE_GNU_PROPERTY