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=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 1D91DC43464 for ; Fri, 18 Sep 2020 20:15:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F334207D3 for ; Fri, 18 Sep 2020 20:15:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="YYDR5W+p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726682AbgIRUPm (ORCPT ); Fri, 18 Sep 2020 16:15:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726660AbgIRUPi (ORCPT ); Fri, 18 Sep 2020 16:15:38 -0400 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDCB6C0613D5 for ; Fri, 18 Sep 2020 13:15:34 -0700 (PDT) Received: by mail-qt1-x84a.google.com with SMTP id l5so6092402qtu.20 for ; Fri, 18 Sep 2020 13:15:34 -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=Aq4KaYtXPvsIFu2w9Cb9+vNMYXxmfrCDkI2ZzAJ/U8w=; b=YYDR5W+pWvCCMlsLuxLz2kP7xV+uq2FmsovV4iGNvno67WC358C4PSNmTbdGHW6cZy Xr2bfek6oOyIlLCqqcmz58AwsnwR59RRO+p9vcpDdt33YhN8IrJ/O6OhGAnZkSzVXUBi juaZEaotR1IoDS52HcVfmR1tV9lf6hMZtKDYu+gLSSBc5p2YM9N18q2UMIgXTdzr3uIq Fm8Rp3KBn78V9C/U0MxUKT6AZU9wjegUqE9FD6bezlPI8xyTBnsPinaduX3IiPx/NQx9 CiLebwGjfIl4ZFQ0mM3lJvlbPYemZFWx56rfr5kUCzWThPFDwAshAHrFrPtMZk+I/w6c LAyA== 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=Aq4KaYtXPvsIFu2w9Cb9+vNMYXxmfrCDkI2ZzAJ/U8w=; b=tHs3FDzvaXWdMYoPGY/mDWx6oaKJpeyMC5v8B5YxvXwOI/Vcl2hCEgdawH3JA5JbSG W9npr06OcxqVjdAr6tNjdlTSKYpt/6vnGC1vlxwegt+spPAMvyhPALCluEySxmUxSfOs j30TigYxyTiKt7xmbygY/z39gk5L6+nb2ovSA17Go1gIXggWjtG3Obi7N1r6duCyh6KO elKPpD05fxFyjyPhVxWUnn/3B1rkyK3dezN69zPmNJYFDZaWg40eJ6Vym1lYLXsD13sT LOUtFugg/6Zno46GztMnSh/dq7U2cD8JxZBnSvKhDd+KXRtX5+h3pS44xGMzNN8exfom AEyw== X-Gm-Message-State: AOAM532BADu9Zs6K0w4JWp49g3CQwI5fhOlIQYHtfQlTsgFlWaoxGops dfI1O5G+B9WEUxUSm8HdAEooVyinhsnCNubFp7w= X-Google-Smtp-Source: ABdhPJzXb8qZ74hw7N+WHo8RG9mWCgQryKG+Dq+aV9VBYLvnlICCRjFkSfcNOp4lq06uZySFvKcVSM3OKhDJkRKVbys= 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:ad4:4d87:: with SMTP id cv7mr19182556qvb.49.1600460134116; Fri, 18 Sep 2020 13:15:34 -0700 (PDT) Date: Fri, 18 Sep 2020 13:14:29 -0700 In-Reply-To: <20200918201436.2932360-1-samitolvanen@google.com> Message-Id: <20200918201436.2932360-24-samitolvanen@google.com> Mime-Version: 1.0 References: <20200918201436.2932360-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.681.g6f77f65b4e-goog Subject: [PATCH v3 23/30] drivers/misc/lkdtm: disable LTO for rodata.o From: Sami Tolvanen To: Masahiro Yamada , Will Deacon Cc: Peter Zijlstra , Steven Rostedt , 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 := \ -- 2.28.0.681.g6f77f65b4e-goog