From patchwork Fri Oct 9 16:13:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11826651 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4DC6E15E6 for ; Fri, 9 Oct 2020 16:17:58 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id A4CE62225D for ; Fri, 9 Oct 2020 16:17:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="kWaosZKl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A4CE62225D 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-20152-patchwork-kernel-hardening=patchwork.kernel.org@lists.openwall.com Received: (qmail 7899 invoked by uid 550); 9 Oct 2020 16:14:35 -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: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 7837 invoked from network); 9 Oct 2020 16:14:34 -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=BiHYmAAiH626N89XqxkZXfyE7gUyoYuU5gV65m3nGjQ=; b=kWaosZKlpyaPhHKVgAB5jaN7Z/L5GLVvlb4+fdv2ch+ej3HpYqzh6uZcdm3+Tvoykg 6omGVQqiCVxWzoz/gV2RtiawIlWAzwAOAuDWw0klxLvDAp9C8MllbAFa/+mLP6BcvQ6Q 1JGIssCdJM4GgwAf9G0Zx3c0le6touIF258LA0TedygIS2yHumz44INySxDCNXx7yHIK 60P3ikRwg9bDNGtZtGkEoyU1tNL/E5ndf++JFwH856D/hSDeXzqinxxFRqXy0QAm3BSb k4Ywf7UqYk+GgIXWciDnanYQ1EPbCUEpP8hpqyk2cG836ip23OzwDZz83/Buo4laq19m uH1w== 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=OfIZtBCuOryIbtX+iX3+2IsKswzohZlpQLW80dWH8f/gMqkL2cC2nK8DQj8S0lb9E5 He1DW3pB66fYpUI/ClrLlyYfSONFN/bctxatQElcGALtn5YPF7ews4JkYNBZX+3EPQsl eFN0VHMnewL5WSyc22aAhPoUidikvpUCfYmETnaC/Q/eJSkQVJHCFBkYcz2c62jyYDI+ +Us/N6mzr2WhvAP7r4H5iEJeDS5IBVr8vBpFdUlc3lvHdT3dLudrpSp5og798aP/Se8/ iFJ25MFmizIRC8s3U6x2iEEQ/Q8i3gkDnqyMhDGHkjQk9/f8JZbGhRiB4wdWkQG+xCaQ ltoA== X-Gm-Message-State: AOAM530SW93AawXr6zM1XD1yT5LBucTzZZf6cjGTWS14ZF49+ArSwKWM u4RNPAjhLeqHR9kzdT5Yb42utsUfq2ftEDYFrBc= X-Google-Smtp-Source: ABdhPJyHPiE5GePYAvaEya8u/0CvrCAAGbNDB2zBtM4hELH+YYZewJMzkdHOHE7lBNk0pBM71xtMSBAsdjBdBJfED8o= 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:7c0c:: with SMTP id v12mr5366318pjf.71.1602260062781; Fri, 09 Oct 2020 09:14:22 -0700 (PDT) Date: Fri, 9 Oct 2020 09:13:30 -0700 In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> Message-Id: <20201009161338.657380-22-samitolvanen@google.com> Mime-Version: 1.0 References: <20201009161338.657380-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v5 21/29] drivers/misc/lkdtm: disable LTO for rodata.o From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt Cc: 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 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 := \