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 6EB80C2BA1B for ; Mon, 6 Apr 2020 16:42:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41BE92496E for ; Mon, 6 Apr 2020 16:42:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="uzysDj83" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729703AbgDFQmP (ORCPT ); Mon, 6 Apr 2020 12:42:15 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:41008 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729692AbgDFQmN (ORCPT ); Mon, 6 Apr 2020 12:42:13 -0400 Received: by mail-qk1-f202.google.com with SMTP id d18so366937qkj.8 for ; Mon, 06 Apr 2020 09:42:13 -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=Y7rlrv2nhrkBeB3yxrt1isCdPASfC8dC7N7qsaqIYpI=; b=uzysDj83wFfvyx5+xHx53APFuGywhQGNYTYnY3+lbcNA+3qpT2RyVCtTCzOVWuYtrd IJ7VKcld7TMSS+B4Duop178kHp3dnyyCbFCaQG30nNlIZu2qp3pd8gPvWCQ/vh5UCVNI qYZP5lzEpIK9s82LrNfMVTyGg0YHy+wtBcdXCYONK5VtuSr/B+ie2tXtTLyaJ9IPy1+g 3D+xo+ACBtd8mKECNNqIvX1PJ+oInNfLa3VP4gJ7IaAStMJAKw0/1v2sPcOcrSw5vqh7 xI4vpzaPpkYp+bSxRgABVKY3EorsZQeCB4tyb7kBdLZS86i8LGqxeDzzj01uFZHbP3SR Lm4Q== 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=Y7rlrv2nhrkBeB3yxrt1isCdPASfC8dC7N7qsaqIYpI=; b=rzruPKPJ5muO8Vo3HkG8CwQ/hwJ6snyBc1/jP9uV+J0YOQRCIzRUtyHHI9Znc1dAQl V+l/MluDs4LXj3bHHSBMegXM0zpezAM89rtSrZ+ZXLwDd55IFbrNMdy2Hm1E1SJfAsAD 6CbaTM7EpfmjS8Ja8Xqb+sesuf2FRK+2lYFfMtIl5qmlgvl7yKRZ/PBElDi3HOZY9B92 aItBEq1PzQkqW42eaOWj4vbxLIZmlnx3BspQiZy5bp8LqULrozny9ZU4ey6rSc3s7Sgi oemYHpAPDs/eVi2uZdDLUSkwjK3YgdwQR1A9694ldEPdvMn1kUCh/BTmQl9+Zi2YPnov aLjA== X-Gm-Message-State: AGi0PuYCfw2+Qz4lCZw1S5sthf5ZbB/mn0y2pQj5Bv7jCcYe6REY9vW2 Nr4MwlBqbXDWRB2c5q+QuwfPR2x7Ly1ahRBZdqM= X-Google-Smtp-Source: APiQypIq6K+/6sNFF07UPysJVLbTskXzuAKdx/I5NBmymQNj01YODUpkepZADD3StGdWVd8jEygPyA4Kk1CGRFm+W3w= X-Received: by 2002:a37:4d88:: with SMTP id a130mr21585753qkb.443.1586191332817; Mon, 06 Apr 2020 09:42:12 -0700 (PDT) Date: Mon, 6 Apr 2020 09:41:21 -0700 In-Reply-To: <20200406164121.154322-1-samitolvanen@google.com> Message-Id: <20200406164121.154322-13-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20200406164121.154322-1-samitolvanen@google.com> X-Mailer: git-send-email 2.26.0.292.g33ef6b2f38-goog Subject: [PATCH v10 12/12] efi/libstub: disable SCS From: Sami Tolvanen To: Will Deacon , Catalin Marinas , James Morse , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland Cc: Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen 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 --- 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..fa0bb64f93d6 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 -- 2.26.0.292.g33ef6b2f38-goog