From patchwork Tue Feb 25 17:39:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11404383 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B4A24930 for ; Tue, 25 Feb 2020 17:43:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 916B02082F for ; Tue, 25 Feb 2020 17:43:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="k/N6nChb"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="AG/N+nAH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 916B02082F Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version :Message-Id:In-Reply-To:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=L1it+uvEiOM/yT7nI5jluIudApEg303EXIRJ82F2N4c=; b=k/N6nChbG0VJR4 GrSLGXl97+DPf/SNUWj8Y1nB+xBYOqcM5z2ks5fb/URWVs1Nx3XY5+H4DmxRfX2iUvX024aRVbqjO 9A0Ow9kblmWrITSGgMVxKmORLMiYrA2p129p9rfO4+wd4dni7VqWwHyIy9IFkR5jCKPbcoy+XUzy8 /zvAvn49ODZ2qWyVGB/CGhSpZlxHZzSTU3R6L4OVGhWaRmWoIFwpcY7gqk7YeeTTmx4kQeiLHyklv LGDtyd8PM7xKV0I+PsWqchDnjvJccpG0FVjfozIgIUqqd6lqdwJOAtr3wbarP0BU+en+f/hxwLrdz TTd7MspCzOAXwBs/H2Kg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j6eEl-0005dR-8Q; Tue, 25 Feb 2020 17:43:15 +0000 Received: from mail-pg1-x54a.google.com ([2607:f8b0:4864:20::54a]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j6eBx-0002sd-7B for linux-arm-kernel@lists.infradead.org; Tue, 25 Feb 2020 17:40:22 +0000 Received: by mail-pg1-x54a.google.com with SMTP id x16so9428640pgg.5 for ; Tue, 25 Feb 2020 09:40:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=S6rjWX4zh65J8qRPSZGN8zFIqvl385Xc8XQW3COWMIA=; b=AG/N+nAHceAaZJA2t3Ejlewnc800yTOYWW+XxDFlkHuEYsEQXM8laR8JPO6q9sZexT Qx9MR9PKuF1TFGK9rO4WrVGkhDFRUGBo3nTHm42lh1aY7DKUsRdqOVC006GRSybPTBpy CwdI4+LxD7e+4hZQ2qE/GwtlmXo1ZC8r/ZErTUuiCdp5rmFmAgH5PeFSBDiA+eNFZEE1 7vUfoZhf7+iQVtJY9b36r4K3TymVF9QDFXBobvvCwA1YLJK0qNYbbXNNu3MS1aQw9yMX I0P+8rGbiMpOXi6P0ZHT3Ij2kkgGsyVJDrLVC8dfHFUYAz5mItfFosYAxy/OwBsM9sCx TRAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=S6rjWX4zh65J8qRPSZGN8zFIqvl385Xc8XQW3COWMIA=; b=Qm6LpYODszVJyhnHtYxsZpyHC7hw+VwgA2a1fZ0pyX5IwSMPlCQeeVRPq3cmg2CRvQ igA4zJ4QXNHhgIk++D1PXw/qqhjwzs31YQDneBOuxwF03C7qBx6ShxWnnPwsqgasuIm2 V8I0Fcnxn9CUf1pEeeItZvcTu5Hf5nJMtnD5sR/njUiupKU0DcdOTR0Y3BY8DKWre7Tr 5Vdjv4qAoQUMPnJg7gpjQeVpL546Rw0nn+cDxkekQkNoXg0kllCOmRul0oJhvt6sT9bn tYF1eMzHpg4mgv9EZc2Ysvsg4ILa4T6TD9TE9KpalOGr37e97wUbqURBCQZ9dQ9SYwZD 4EsQ== X-Gm-Message-State: APjAAAUKupxBlzjLiXyBMSc4zyBDTRSt69QA/SHoy+XlbuIM3hQq2qdB mO6o+63kWc6vzy5ZT+84sYvxv44z5EuPpxQPi/o= X-Google-Smtp-Source: APXvYqxga1IezAaj/7lzDoz6ajYcBY13ZBQ7EtWObgAVtXX9jDsYBp8jjd+EWNf7mvFW/jyX4NCc+z3bne5DtOlbYaQ= X-Received: by 2002:a63:e044:: with SMTP id n4mr57741015pgj.338.1582652419605; Tue, 25 Feb 2020 09:40:19 -0800 (PST) Date: Tue, 25 Feb 2020 09:39:33 -0800 In-Reply-To: <20200225173933.74818-1-samitolvanen@google.com> Message-Id: <20200225173933.74818-13-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200225173933.74818-1-samitolvanen@google.com> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog Subject: [PATCH v9 12/12] efi/libstub: disable SCS From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200225_094021_360581_575D3231 X-CRM114-Status: UNSURE ( 9.34 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.7 (-------) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-7.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:54a listed in] [list.dnswl.org] -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Masahiro Yamada , Marc Zyngier , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, Miguel Ojeda , clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Shadow stacks are not available in the EFI stub, filter out SCS flags. Suggested-by: James Morse Signed-off-by: Sami Tolvanen --- drivers/firmware/efi/libstub/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 98a81576213d..ee5c37c401c9 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -30,6 +30,9 @@ KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ $(call cc-option,-fno-stack-protector) \ -D__DISABLE_EXPORTS +# remove SCS flags from all objects in this directory +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) + GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n