From patchwork Wed Nov 18 22:07:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11915999 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=-26.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 9DEBCC63798 for ; Wed, 18 Nov 2020 22:08:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EA8B2054F for ; Wed, 18 Nov 2020 22:08:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="wXL6d0K4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727505AbgKRWIH (ORCPT ); Wed, 18 Nov 2020 17:08:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727478AbgKRWIE (ORCPT ); Wed, 18 Nov 2020 17:08:04 -0500 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 954A4C0613D6 for ; Wed, 18 Nov 2020 14:08:03 -0800 (PST) Received: by mail-qk1-x74a.google.com with SMTP id v134so2805796qka.19 for ; Wed, 18 Nov 2020 14:08:03 -0800 (PST) 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=mxI/yASg0f6Fr52O8HbJJtAQuezjHMCx8HIdyf0ndaw=; b=wXL6d0K4ogSQ2FXaTmMFlblc8ygekSoyqjsrSzzJDjpixZCmnN20/goG3t/ED7/DTH OxdlaMC9ge+QbZ8tXanDBoxT3LpWcOf8luW/CBKbpnh2xsq7sGt5KwPvZSVnl9APk3gO 8N7JkaxorXB7vboromu73acJ/93kZSSKsn9wdnqxhZRK+w7gFkEwM97MObjc/QMVHCur LGzCFisEIGmrlzY+iEYp9MAwtUT5BXbioFgGSXGwTvoJdAm+0xS7LKQ79iRezYDrbJkJ e3z4mvr4MBID2gFRQexM6A6nq0jYREQkekiigQeetFyTb8zgk9F3ePzJdu41Y2TB8/OO uNyg== 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=mxI/yASg0f6Fr52O8HbJJtAQuezjHMCx8HIdyf0ndaw=; b=iaZDoJQwL8R7aM/7czVsJVkigV2/Nr1ytRq0nEAIXpPW+L6BqWx+oXGI0R4dYfQ+Iw HXrY5dv7DasXg0A6XoHB/rmg2SBBNh5XfdhYz5UbXLP9jiwpIAoup+hM9U10KdsnGGS5 uXkC633mJb8sBKVq1Uuw+cLRNhS96i94R4BAcsCxm/rcEBO0Cty0/7mMFHqyHeZ0HyB6 czUUzmbojDMQXQuLBHPRxffU53ThhvbHWiOEiyJBdc55yrxPgVs4rUE4X/D44GTTr/qS tEYHX9pWLKiNwxF52PsKx44v5zHPs5ur/qKm1nA0Lo6RJQdlfO2fyEB5FsXvTF2ogtbB cigw== X-Gm-Message-State: AOAM533sMz/E/rnX7ukncFLG5ndFpZ584bhmhJMjSAl7JGJftt5aAC9s fullsRbA75lzAobWEui+lUbn1wlfrMJr8bIX2bM= X-Google-Smtp-Source: ABdhPJzzh79iYBu53HM7s0ihX08oKft9CFEoRm+vpxgv6uzQ9nNVk7YbdnmB9oztYmiJRe0kvbcEJOxZvLrcJbYG6fo= 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:a0c:b34a:: with SMTP id a10mr7403176qvf.15.1605737282753; Wed, 18 Nov 2020 14:08:02 -0800 (PST) Date: Wed, 18 Nov 2020 14:07:27 -0800 In-Reply-To: <20201118220731.925424-1-samitolvanen@google.com> Message-Id: <20201118220731.925424-14-samitolvanen@google.com> Mime-Version: 1.0 References: <20201118220731.925424-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.454.gaff20da3a2-goog Subject: [PATCH v7 13/17] drivers/misc/lkdtm: disable LTO for rodata.o From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon Cc: Josh Poimboeuf , 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, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@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 := \