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,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 59616C55199 for ; Mon, 27 Apr 2020 16:01:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 366CD20735 for ; Mon, 27 Apr 2020 16:01:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ijnQ0fnO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728628AbgD0QBD (ORCPT ); Mon, 27 Apr 2020 12:01:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48544 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728517AbgD0QBB (ORCPT ); Mon, 27 Apr 2020 12:01:01 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57161C0610D5 for ; Mon, 27 Apr 2020 09:01:01 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id y7so20921816ybj.15 for ; Mon, 27 Apr 2020 09:01:01 -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=aF2klQa9rRamHf/M4CeCxFGtvwc1mZVJXnokoniINw4=; b=ijnQ0fnOBOZz8ohYGbprOcWD6bXoahdyQ/EdPHNcahHH1UNi6yI4DR5R2vlPmVt+MA 4ppIwntZ2J5xzVAeqXwe8sImyb647bo4hHg8kf1yP8EUjew4IgKXlLT+cyN+LZsy9Bq6 UC/DmCNG2YyUikRIYaXEhti+n0bf2Uk+eSvlUyy0VkRfNHrV9zVYezDs+dHfFwKCE9hw sMB0tZWkO4naa4enGnEraDahmtXjGEJ9z7j4fYeSXhaXwN3tRENHyK+EQjCXHOgGEjXH LRUwN4NXMSq2HIBjq6AGd84jx2T6eVKALaDwXc+kFG7UvOg+1/Elzk8FlgUN6WR5CVNf +rUA== 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=aF2klQa9rRamHf/M4CeCxFGtvwc1mZVJXnokoniINw4=; b=VpacfUFeq3bBRvM8GlWIs2MlS8iQPZLGn7S+EFK5W8N0vhe8JOFrj+Q2vynS4KAhCv G/oUtXyShveniB6q7inSgeGpzzSUpRuKzrRwFxQV8dblMDnxzBztjkzV/foaoUWLvEr0 whggPrDUFZ5VZR+RSVSD1X/hUkvOLdZE+cPDjYmpNg73tYhAR9C08gxG7/hUCkgYxpgG VtZ973DYaILkwV6lwegqLrDSWYxSFBJZXiu+bgt1amRZFSUMC1OcbXx9cqBb58LT3reE LJQCEQDq0hh9D/6IAKkkZx9+/lKJceKzYunkm9GeDlJIL30fwU8RKv7l5CrBbsqKugRI 7euQ== X-Gm-Message-State: AGi0PuYsJ+DAUHZCyVikwStCTpZAdfaOngC47c4O6/WriwfDAw999PhM WlUkJfswyWGPoW9ivAYxCZWBBxF/0Y70wNVHy/M= X-Google-Smtp-Source: APiQypKOsjWQ+jO+l4BxG62MWOPRhB/PQQHwz7wCFC1Vfqvf4Ou89RrbjPCh/lsRauohpj0Cl1hSrISC+Brb9ZNFufc= X-Received: by 2002:a25:23d4:: with SMTP id j203mr35345989ybj.97.1588003260531; Mon, 27 Apr 2020 09:01:00 -0700 (PDT) Date: Mon, 27 Apr 2020 09:00:18 -0700 In-Reply-To: <20200427160018.243569-1-samitolvanen@google.com> Message-Id: <20200427160018.243569-13-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200427160018.243569-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.2.303.gf8c07b1a785-goog Subject: [PATCH v13 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 -- 2.26.2.303.gf8c07b1a785-goog