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=-20.4 required=3.0 tests=BAYES_00,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=unavailable 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 D5C48C5517B for ; Tue, 13 Oct 2020 02:42:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A71D3221FC for ; Tue, 13 Oct 2020 02:42:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XNjBIDIN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727792AbgJMAej (ORCPT ); Mon, 12 Oct 2020 20:34:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727717AbgJMAdj (ORCPT ); Mon, 12 Oct 2020 20:33:39 -0400 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CF4FC0613B4 for ; Mon, 12 Oct 2020 17:32:53 -0700 (PDT) Received: by mail-qt1-x849.google.com with SMTP id g3so13821932qtc.5 for ; Mon, 12 Oct 2020 17:32:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=BiHYmAAiH626N89XqxkZXfyE7gUyoYuU5gV65m3nGjQ=; b=XNjBIDINKT2pRuTcs85XqtGqpKKB5NK63w4IySiOIysYaLEiPBkXTqBpHa9k0rcANP Mq8luu8tR+/vZGjuz5FWZqlrWlbhD1dsrCW8kjpnk6Of8lm3Uq7bjBxMFSPhYIwpNkRs wzxAjEDJS3JTBUI9Rc9q6CxPrCEE1D+TblGGgUcWZ9InruHmMULIEq8MSFdie4O9SeCJ CDrDZvBBKT7r3ExX0KMrO5Td8OLZ31CYqJR7Va6pe/bqAPf2uWlcxTyzqGmJpNzT0KMv wQ0Tg2BqZiU27oj8+ptgF/4aA8HHcfJ5uqYDxVmwrvDxTkUyV923+xAgmlUuAFczliXV NdAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=BiHYmAAiH626N89XqxkZXfyE7gUyoYuU5gV65m3nGjQ=; b=kRfewy2cw5GIhvnsAsVRYB6uQUuqDVabDMDvlySHN34mfMksBezTLq1X77XAif1cmR g9rhMlLrs+HIlBHzcIvBbmOKz/eIadmoWfJCPzKQ/Y5v1fUrniI4wVADDY08Yx03d7ap ksv2xOHpUkz7oiSfZjyz+/0InMYEq/5gw7lRRmnz8++tv6A2O+ALSEGXsTkZ3txUhIrq esAyP/R/icZVKYW6rew/6HvdRu2xTFu7Y+tPsG745ioNcLtac003IOdbkie9FEVFOmRk N8MkbDeDuWeFV9qCUlol7lKcGaGIhCgRiXgT3tD/VZ3SKkdupmLcbz1yU1XqY55oDjlJ 4V1Q== X-Gm-Message-State: AOAM530uJINsRoCBNQ8HrpeRAs9U+siIdfJz7eSOoTbY/ltF5SEUQyoT cqkIbJxIj8vO9u2sx61rEhnqDgPdOvG/7Nc+gjM= X-Google-Smtp-Source: ABdhPJw5yrP7SHcc7TWSGYuiAJWigblY6T4KARgQjUPREPTC4jVDZK0jmnjuyAbsgm5fKdwKwlLo7kamaFSoW1+wZMw= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:ad4:5747:: with SMTP id q7mr15646088qvx.0.1602549172707; Mon, 12 Oct 2020 17:32:52 -0700 (PDT) Date: Mon, 12 Oct 2020 17:31:59 -0700 In-Reply-To: <20201013003203.4168817-1-samitolvanen@google.com> Message-Id: <20201013003203.4168817-22-samitolvanen@google.com> Mime-Version: 1.0 References: <20201013003203.4168817-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v6 21/25] drivers/misc/lkdtm: disable LTO for rodata.o From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt Cc: Will Deacon , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Disable LTO for rodata.o to allow objcopy to be used to manipulate sections. Signed-off-by: Sami Tolvanen Acked-by: Kees Cook --- drivers/misc/lkdtm/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/lkdtm/Makefile b/drivers/misc/lkdtm/Makefile index c70b3822013f..dd4c936d4d73 100644 --- a/drivers/misc/lkdtm/Makefile +++ b/drivers/misc/lkdtm/Makefile @@ -13,6 +13,7 @@ lkdtm-$(CONFIG_LKDTM) += cfi.o KASAN_SANITIZE_stackleak.o := n KCOV_INSTRUMENT_rodata.o := n +CFLAGS_REMOVE_rodata.o += $(CC_FLAGS_LTO) OBJCOPYFLAGS := OBJCOPYFLAGS_rodata_objcopy.o := \ -- 2.28.0.1011.ga647a8990f-goog