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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7DC8C433F5 for ; Thu, 10 Mar 2022 10:25:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241261AbiCJK0A (ORCPT ); Thu, 10 Mar 2022 05:26:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241272AbiCJKZu (ORCPT ); Thu, 10 Mar 2022 05:25:50 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 774A313EFAE for ; Thu, 10 Mar 2022 02:24:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1646907876; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EwM5m/UKCLcQUodhjTTwfqA0OAG1WbMnIR0FKcI9qsQ=; b=ZkZch8Dd6jn5g+SaDUYd2hB8rrj/dVdQh7FpjJf8FA31cvSRoKVVwWFkEME4NI4f+flV05 MWUv5eM11aClVWFxM+5RTs5J+QJbN+jafC5kCG4rhbneW4vwLEUBz8DcYC0UOsNDzKqzp6 tada2hMUyGf7fyBGc041lVwX0UlYPgQ= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-604-1-Y-quTcNbeBDX9hurjf5A-1; Thu, 10 Mar 2022 05:24:35 -0500 X-MC-Unique: 1-Y-quTcNbeBDX9hurjf5A-1 Received: by mail-wm1-f72.google.com with SMTP id v67-20020a1cac46000000b00383e71bb26fso1959195wme.1 for ; Thu, 10 Mar 2022 02:24:35 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EwM5m/UKCLcQUodhjTTwfqA0OAG1WbMnIR0FKcI9qsQ=; b=tae0Ln7BhuFQ3PCciu1U5yCiMmLJl0KU/4s7rWVVJCjJdnfMaZZB/jzVgahca2s7PF 6Glki54HhcXAPmwRfWubXVytE58/vUuYZAeO7g8CRy54BMvK7JNPSo3eZIeoDhIfaPnZ 8qx6Njjv3Fg26nmVh/fRGyLZfL4/CaCk0JCRTdBrKbfrnK5/ACKI5gvg1EhSdOqb4A59 iZXqHSLSL4PI+4q5a+PrBWugqE8IE3ENyRSa5bPoasyo3GVqz01OJKFYrAyYyaSr9/F4 Jur4uY1F3hT7+CLuzk4WKNYYjdwe9lDDd0smTB8vAWx6/XY73RYqXsdDC6MHnWZGa9qb lO/A== X-Gm-Message-State: AOAM531Xvds3+n8o1A9VPdWZyZDmvWMQ8ds9oytpgyGzRFvPn5Wcu2+W nGO+JQGyAON3v21elADOS03zhd1khpPNNT9dz540uCcvp9IJzyVfOjWxvw9jjTAXjnzWDhSnmvi Zhm2VQ4GvDkd3QRxxJH7aBaHw X-Received: by 2002:a05:600c:4142:b0:389:a592:10ce with SMTP id h2-20020a05600c414200b00389a59210cemr3042010wmm.148.1646907873691; Thu, 10 Mar 2022 02:24:33 -0800 (PST) X-Google-Smtp-Source: ABdhPJzdjUYdxCgT86QW3Z7nzJHOo6s64FYEo4BqKE9S3089+9oXnTJ10VUebqj6CUYdWAtQScU9MA== X-Received: by 2002:a05:600c:4142:b0:389:a592:10ce with SMTP id h2-20020a05600c414200b00389a59210cemr3041986wmm.148.1646907873507; Thu, 10 Mar 2022 02:24:33 -0800 (PST) Received: from localhost (cpc111743-lutn13-2-0-cust979.9-3.cable.virginm.net. [82.17.115.212]) by smtp.gmail.com with ESMTPSA id h12-20020a5d548c000000b001f1f99e7792sm3696411wrv.111.2022.03.10.02.24.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Mar 2022 02:24:32 -0800 (PST) From: Aaron Tomlin To: mcgrof@kernel.org, christophe.leroy@csgroup.eu Cc: cl@linux.com, mbenes@suse.cz, akpm@linux-foundation.org, jeyu@kernel.org, linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, void@manifault.com, atomlin@atomlin.com, allen.lkml@gmail.com, joe@perches.com, msuchanek@suse.de, oleksandr@natalenko.name, jason.wessel@windriver.com, pmladek@suse.com, daniel.thompson@linaro.org, hch@infradead.org Subject: [PATCH v11 08/14] module: Move kmemleak support to a separate file Date: Thu, 10 Mar 2022 10:24:07 +0000 Message-Id: <20220310102413.3438665-9-atomlin@redhat.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220310102413.3438665-1-atomlin@redhat.com> References: <20220310102413.3438665-1-atomlin@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: No functional change. This patch migrates kmemleak code out of core module code into kernel/module/debug_kmemleak.c Reviewed-by: Christophe Leroy Signed-off-by: Aaron Tomlin --- kernel/module/Makefile | 1 + kernel/module/debug_kmemleak.c | 30 ++++++++++++++++++++++++++++++ kernel/module/internal.h | 7 +++++++ kernel/module/main.c | 27 --------------------------- 4 files changed, 38 insertions(+), 27 deletions(-) create mode 100644 kernel/module/debug_kmemleak.c diff --git a/kernel/module/Makefile b/kernel/module/Makefile index d313c8472cb3..12388627725c 100644 --- a/kernel/module/Makefile +++ b/kernel/module/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_MODULE_SIG) += signing.o obj-$(CONFIG_LIVEPATCH) += livepatch.o obj-$(CONFIG_MODULES_TREE_LOOKUP) += tree_lookup.o obj-$(CONFIG_STRICT_MODULE_RWX) += strict_rwx.o +obj-$(CONFIG_DEBUG_KMEMLEAK) += debug_kmemleak.o diff --git a/kernel/module/debug_kmemleak.c b/kernel/module/debug_kmemleak.c new file mode 100644 index 000000000000..12a569d361e8 --- /dev/null +++ b/kernel/module/debug_kmemleak.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Module kmemleak support + * + * Copyright (C) 2009 Catalin Marinas + */ + +#include +#include +#include "internal.h" + +void kmemleak_load_module(const struct module *mod, + const struct load_info *info) +{ + unsigned int i; + + /* only scan the sections containing data */ + kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); + + for (i = 1; i < info->hdr->e_shnum; i++) { + /* Scan all writable sections that's not executable */ + if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) || + !(info->sechdrs[i].sh_flags & SHF_WRITE) || + (info->sechdrs[i].sh_flags & SHF_EXECINSTR)) + continue; + + kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, + info->sechdrs[i].sh_size, GFP_KERNEL); + } +} diff --git a/kernel/module/internal.h b/kernel/module/internal.h index d6f646a5da41..b0c360839f63 100644 --- a/kernel/module/internal.h +++ b/kernel/module/internal.h @@ -167,3 +167,10 @@ static inline int module_sig_check(struct load_info *info, int flags) return 0; } #endif /* !CONFIG_MODULE_SIG */ + +#ifdef CONFIG_DEBUG_KMEMLEAK +void kmemleak_load_module(const struct module *mod, const struct load_info *info); +#else /* !CONFIG_DEBUG_KMEMLEAK */ +static inline void kmemleak_load_module(const struct module *mod, + const struct load_info *info) { } +#endif /* CONFIG_DEBUG_KMEMLEAK */ diff --git a/kernel/module/main.c b/kernel/module/main.c index c63e10c61694..7dd283959c5c 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -2519,33 +2519,6 @@ bool __weak module_exit_section(const char *name) return strstarts(name, ".exit"); } -#ifdef CONFIG_DEBUG_KMEMLEAK -static void kmemleak_load_module(const struct module *mod, - const struct load_info *info) -{ - unsigned int i; - - /* only scan the sections containing data */ - kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); - - for (i = 1; i < info->hdr->e_shnum; i++) { - /* Scan all writable sections that's not executable */ - if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) || - !(info->sechdrs[i].sh_flags & SHF_WRITE) || - (info->sechdrs[i].sh_flags & SHF_EXECINSTR)) - continue; - - kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, - info->sechdrs[i].sh_size, GFP_KERNEL); - } -} -#else -static inline void kmemleak_load_module(const struct module *mod, - const struct load_info *info) -{ -} -#endif - static int validate_section_offset(struct load_info *info, Elf_Shdr *shdr) { #if defined(CONFIG_64BIT) -- 2.34.1