From patchwork Fri Dec 11 18:46:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11969061 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=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 7F437C4361B for ; Fri, 11 Dec 2020 18:48:55 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id B6AB722248 for ; Fri, 11 Dec 2020 18:48:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6AB722248 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-20595-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 9740 invoked by uid 550); 11 Dec 2020 18:47:14 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 9661 invoked from network); 11 Dec 2020 18:47:13 -0000 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=aPTc8wYkBIIZS9XLhaJqPHrVGew/rHRzWtLqs6SwnEk=; b=E+U0sSuZCC6dC6kicRnG1UaOFnx0iJfVyKRNQUtLjfW4hBBe8OQHaAuEWS9h6JwKDx nx6Zu83awRxikbvdB79vty/SByEvJivxVql9gf2LMdRTfeqEVv6ipQ1QsF9J7PWYP4ci xFn+wn1LX/1iDg9jO4eVqOOQ4FreP1QjK0OhIyps0vVvKsrGxhaOt0uJ7F7usCg/jpLp gwWhvDGGPcYg2A/8emqAajS7l0RY+zs0C+//CZq5Gur4DDUAlFbFqzlQpajQdqS8M9Zx v1gv/9kwRgkR9BQVqOJaPgZ90khLPqENshOnYY+glZxACDE1KVCQlvqrVGtAtOTfVdje HG9A== 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=aPTc8wYkBIIZS9XLhaJqPHrVGew/rHRzWtLqs6SwnEk=; b=aXDJR5FvW5166dzfwBdQ/TwaTfHnnyVA2Lz9Gumyck/W31CA0o5MWR66Y+eVAgATKl D6WGOu3Xcn662LG8/xpdbcTcP/mGihEu7FQX3GR9cKwSoVN9HOQ9iokLS9cZ1Ht9clZp 1XaFdMg1R4uuyKs5P5YGThNYTFez1nTMJgMHfsIMVc9q3791UvHbZvDP70kX77vJZitZ qepX3yvNZWqOrJ/ztAO7Ae5MdkttjxKq2nJ3LqxBKhZ7cLJpElyVfkkqA9gydObqiFj5 NPV/qkdu8BYFMdH/7IZna8K1x8Pf+ECv2Lq3OnVrN4lGnxhFRK25h4ALq0Dv6+4Gfq7L 2Qsw== X-Gm-Message-State: AOAM531i/DFfW0LpVo0CVm1yLVjiCAazNYQprB5dniX4hRR0Hzb+Q7Uw Xqk/+859Ti+N4CUDe2P9Lbm6FiMwfPDHugtcp98= X-Google-Smtp-Source: ABdhPJxd+bMesTAWKmvtUqjomdCAHsA1n3+h09FJfVuePnPbd9mL5SpzLXlx8lDAG4fdUSPHIEIQBY9z8nx1PVd0SrU= 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:a17:90a:a24:: with SMTP id o33mr10805536pjo.191.1607712421542; Fri, 11 Dec 2020 10:47:01 -0800 (PST) Date: Fri, 11 Dec 2020 10:46:30 -0800 In-Reply-To: <20201211184633.3213045-1-samitolvanen@google.com> Message-Id: <20201211184633.3213045-14-samitolvanen@google.com> Mime-Version: 1.0 References: <20201211184633.3213045-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.576.ga3fc446d84-goog Subject: [PATCH v9 13/16] 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 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 := \