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bh=3q7TZ5J5xqKWdUS4X8SiQHdlDi3K3u69bSPkIoNlqR8=; b=FUcDitZMMKUkPmjbxZUrjwGwvTTfMpykayp9KCkvFRQNpV2ZQnsu6r5QB2nudyzlmd L3C30UiUimBiddDr4We8py3XwOIKcTp34nngQWXVo099+O1N+4WKzOiooIuvBUW1kCWp 5f68L2XTR8mVzLDwF2NNPcdIlCQ1ZBpxnbqvArPP0bZnl4Kg0c82vIjy1Jkj81/Doa4I v4Y2CMjSRlMd5lhmRA7vBI45UAZtNulF7BqrKXNCCtapETs+a/3fIES8PbVRH3Z578vz +ptemtm1sqXvkMdGQe6a9jcaOL05j6jvn9OQSeDXDShYMivvimDRNdp1kGSpM8AW2wcp VB7w== X-Gm-Message-State: AOAM533cS4sBSvaKA2qsYDvzCSnu6VB9/tvsmvPYnLa5A3FoOGRgK/4q 7Zfw2qT8fgduKJIym6FdVzGy2SMKsfVfNAwvNCc= X-Google-Smtp-Source: ABdhPJzSHh4NCUcdQaWfXuHL4xXV+3Gzu7YAUpxYnKR7xzXHL7k1OIFuYPArBmNIqbbqiPyK+SQbqhBjAf2rbEmrgrI= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:6555:: with SMTP id z82mr6003281ybb.472.1599165098726; Thu, 03 Sep 2020 13:31:38 -0700 (PDT) Date: Thu, 3 Sep 2020 13:30:46 -0700 In-Reply-To: <20200903203053.3411268-1-samitolvanen@google.com> Message-Id: <20200903203053.3411268-22-samitolvanen@google.com> Mime-Version: 1.0 References: <20200624203200.78870-1-samitolvanen@google.com> <20200903203053.3411268-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.526.ge36021eeef-goog Subject: [PATCH v2 21/28] drivers/misc/lkdtm: disable LTO for rodata.o From: Sami Tolvanen To: Masahiro Yamada , Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200903_213141_546706_B6F9C233 X-CRM114-Status: GOOD ( 10.91 ) X-Spam-Score: -10.1 (----------) X-Spam-Report: SpamAssassin version 3.4.4 on casper.infradead.org summary: Content analysis details: (-10.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:b4a listed in] [list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.5 DKIMWL_WL_MED DKIMwl.org - Medium sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, Steven Rostedt , clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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 := \