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=-24.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 7260FC43216 for ; Tue, 24 Aug 2021 17:25:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52A126135F for ; Tue, 24 Aug 2021 17:25:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241333AbhHXRYe (ORCPT ); Tue, 24 Aug 2021 13:24:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:58942 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240000AbhHXRVm (ORCPT ); Tue, 24 Aug 2021 13:21:42 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0581261B1C; Tue, 24 Aug 2021 17:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629824609; bh=ta8Stluvmw+/efOexVD5+Hz2l1LtrMy7/lVNXcd+soo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eppSUwjVoTdwsL9s2jFNcgl71cFg7KTKN2FK6ilk/pa1NJhlRr717CI83yP1A0PQF xaMPPTlPlpyhwJTAxMbEtVEev/unzUb0HSGr5DL0cbWiqGYTfAjAksxLQAJClHXOtx hJJaqtOxZ1vucpfkNQgT/t25QVUTzQqygxP0cID2kf67YgHJHvORg8fleOG6n5EVyP witI9L5ZQrSGQtncniXfSqJmdefqHP158FBE5W07/QmwB9RSSGp5pnZXRNW+rQ83aA e2ltndKPVN73FtFzJmFilKeQ4QyhCcmbI8sDKpcz5OSiJo8WAEldD//SdmtqPc+1V6 lR86GCWeNS/rA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nathan Chancellor , Nick Desaulniers , Fangrui Song , Marco Elver , Kees Cook , Greg Kroah-Hartman Subject: [PATCH 4.19 39/84] vmlinux.lds.h: Handle clang's module.{c,d}tor sections Date: Tue, 24 Aug 2021 13:02:05 -0400 Message-Id: <20210824170250.710392-40-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210824170250.710392-1-sashal@kernel.org> References: <20210824170250.710392-1-sashal@kernel.org> MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.205-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-4.19.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 4.19.205-rc1 X-KernelTest-Deadline: 2021-08-26T17:02+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nathan Chancellor commit 848378812e40152abe9b9baf58ce2004f76fb988 upstream. A recent change in LLVM causes module_{c,d}tor sections to appear when CONFIG_K{A,C}SAN are enabled, which results in orphan section warnings because these are not handled anywhere: ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.asan.module_ctor) is being placed in '.text.asan.module_ctor' ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.asan.module_dtor) is being placed in '.text.asan.module_dtor' ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.tsan.module_ctor) is being placed in '.text.tsan.module_ctor' Fangrui explains: "the function asan.module_ctor has the SHF_GNU_RETAIN flag, so it is in a separate section even with -fno-function-sections (default)". Place them in the TEXT_TEXT section so that these technologies continue to work with the newer compiler versions. All of the KASAN and KCSAN KUnit tests continue to pass after this change. Cc: stable@vger.kernel.org Link: https://github.com/ClangBuiltLinux/linux/issues/1432 Link: https://github.com/llvm/llvm-project/commit/7b789562244ee941b7bf2cefeb3fc08a59a01865 Signed-off-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Reviewed-by: Fangrui Song Acked-by: Marco Elver Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20210731023107.1932981-1-nathan@kernel.org [nc: Resolve conflict due to lack of cf68fffb66d60] Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman --- include/asm-generic/vmlinux.lds.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index ad8766e1635e..a26e6f5034a6 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -508,6 +508,7 @@ NOINSTR_TEXT \ *(.text..refcount) \ *(.ref.text) \ + *(.text.asan.* .text.tsan.*) \ MEM_KEEP(init.text*) \ MEM_KEEP(exit.text*) \ -- 2.30.2