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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 260ACC38A30 for ; Tue, 21 Apr 2020 02:15:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 019B12084D for ; Tue, 21 Apr 2020 02:15:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="rprfLeuL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727863AbgDUCPc (ORCPT ); Mon, 20 Apr 2020 22:15:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727814AbgDUCP1 (ORCPT ); Mon, 20 Apr 2020 22:15:27 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B88BC061A0E for ; Mon, 20 Apr 2020 19:15:27 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id w15so13939632ybp.16 for ; Mon, 20 Apr 2020 19:15:27 -0700 (PDT) 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=0RQ1N542RT3QYdW6h+S0B1gn+F6MhyfTNdXGmDt/FSM=; b=rprfLeuLS2/09QHh/+y7xWTflZnqrv4ouAc/OGi0JspjqJm6eS46yKUFVvDRBA7xrD IsViCxyeg1EAE5/s87qdzXUUiSf8TnxPVsuAIEAzrr3sqXBZqrbtjCRgovWji//XWbZQ xcpiVJbVBTm7m/L4++NSnlJY0nFfQmhsqhI7X6papIZyD9mnE6qKALG0X6wbzmG68IwR NV/C9sJ2akeM/VxVHXv1UPXM8tN6ST0/kppmOPac277uAdAe7X5IMbeLQ3XxJTYzxblF bzhvQzjWFL0p41IeJx5ZGURPl6ZqYdcPqRjHl+2oWSLxp524C0oH+hXSgGEVR7rzQoiC gbPw== 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=0RQ1N542RT3QYdW6h+S0B1gn+F6MhyfTNdXGmDt/FSM=; b=RNGbDXsGj8LFnhdQr6cP2XIznGcyUX1QX759q59emHifHDbAZHlT4T81NRzyjojt01 idlb724ZN3NIZsB4yxDu/38IiJiw5GEopr0JGQ/5a/bAD1vCsITw6lo4TTOpupQ5gxXi lqL4H0S0qNeISl418qMgLZ8IibRnoA4cJuNmY8uECBfjRRt1jQZ57DKZ1nAPM9/0lkPl Y6X6mQjQAv8TKhRlT/hlMIXOgVOzl/5UvdTZevuF5kvowkJ+Cu6hcxOLLzGsPRUUD4YF OWjo/jobJP2Ckbqd0nQwTKGV7POR8URe+w3Qz0KL1ErBPK5VOZrOxmwYQ4WvhyYwf5f8 jmxA== X-Gm-Message-State: AGi0Pua/F1ELyH1lxqvP5ncW6p4OfpPsJkCDY8V0amaufS12+RpjePOG aJxi7WONmaLsjqvtd2ygDZegQIztEB8/xl0TORs= X-Google-Smtp-Source: APiQypKVaa6EVfAXEUsgkxuszfVQpEqhSdTwtpRewqbIvj3iqtNn3hSJPBlIieXNvYTQbT7aDUwDMoQW4Qa/HRJl/w4= X-Received: by 2002:a5b:112:: with SMTP id 18mr24192885ybx.103.1587435326655; Mon, 20 Apr 2020 19:15:26 -0700 (PDT) Date: Mon, 20 Apr 2020 19:14:53 -0700 In-Reply-To: <20200421021453.198187-1-samitolvanen@google.com> Message-Id: <20200421021453.198187-13-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200421021453.198187-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.1.301.g55bc3eb7cb9-goog Subject: [PATCH v12 12/12] efi/libstub: disable SCS From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Ard Biesheuvel , Mark Rutland , Masahiro Yamada , Michal Marek , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Masami Hiramatsu , Nick Desaulniers , Jann Horn , Miguel Ojeda , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen , Ard Biesheuvel Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Shadow stacks are not available in the EFI stub, filter out SCS flags. Suggested-by: James Morse Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Acked-by: Ard Biesheuvel --- 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 094eabdecfe6..b52ae8c29560 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -32,6 +32,9 @@ 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 -- 2.26.1.301.g55bc3eb7cb9-goog