From: Aaron Tomlin <atomlin@redhat.com>
To: mcgrof@kernel.org
Cc: cl@linux.com, pmladek@suse.com, mbenes@suse.cz,
akpm@linux-foundation.org, jeyu@kernel.org,
linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org,
live-patching@vger.kernel.org, atomlin@atomlin.com,
ghalat@redhat.com, allen.lkml@gmail.com, void@manifault.com,
joe@perches.com
Subject: [RFC PATCH v4 08/13] module: Move kmemleak support to a separate file
Date: Sun, 30 Jan 2022 21:32:09 +0000 [thread overview]
Message-ID: <20220130213214.1042497-9-atomlin@redhat.com> (raw)
In-Reply-To: <20220130213214.1042497-1-atomlin@redhat.com>
No functional change.
This patch migrates kmemleak code out of core module
code into kernel/module/debug_kmemleak.c
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
---
kernel/module/Makefile | 1 +
kernel/module/debug_kmemleak.c | 30 ++++++++++++++++++++++++++++++
kernel/module/internal.h | 8 ++++++++
kernel/module/main.c | 27 ---------------------------
4 files changed, 39 insertions(+), 27 deletions(-)
create mode 100644 kernel/module/debug_kmemleak.c
diff --git a/kernel/module/Makefile b/kernel/module/Makefile
index d1dada641ad6..10efb144551b 100644
--- a/kernel/module/Makefile
+++ b/kernel/module/Makefile
@@ -12,4 +12,5 @@ obj-$(CONFIG_LIVEPATCH) += livepatch.o
obj-$(CONFIG_MODULES_TREE_LOOKUP) += tree_lookup.o
obj-$(CONFIG_ARCH_HAS_STRICT_MODULE_RWX) += arch_strict_rwx.o
obj-$(CONFIG_STRICT_MODULE_RWX) += strict_rwx.o
+obj-$(CONFIG_DEBUG_KMEMLEAK) += debug_kmemleak.o
endif
diff --git a/kernel/module/debug_kmemleak.c b/kernel/module/debug_kmemleak.c
new file mode 100644
index 000000000000..e896c2268011
--- /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 <linux/module.h>
+#include <linux/kmemleak.h>
+#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 2ec2a1d9dd9f..4c2f64a75401 100644
--- a/kernel/module/internal.h
+++ b/kernel/module/internal.h
@@ -6,6 +6,7 @@
*/
#include <linux/elf.h>
+#include <linux/compiler.h>
#include <asm/module.h>
#include <linux/mutex.h>
@@ -123,3 +124,10 @@ static int module_sig_check(struct load_info *info, int flags)
return 0;
}
#endif /* !CONFIG_MODULE_SIG */
+
+#ifdef CONFIG_DEBUG_KMEMLEAK
+extern void kmemleak_load_module(const struct module *mod, const struct load_info *info);
+#else /* !CONFIG_DEBUG_KMEMLEAK */
+static inline void __maybe_unused 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 90c7266087d7..80790d39a6b3 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -2475,33 +2475,6 @@ 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
next prev parent reply other threads:[~2022-01-30 21:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-30 21:32 [RFC PATCH v4 00/13] module: core code clean up Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 01/13] module: Move all into module/ Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 02/13] module: Simple refactor in preparation for split Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 03/13] module: Move livepatch support to a separate file Aaron Tomlin
2022-02-08 11:42 ` Petr Mladek
2022-02-08 15:18 ` Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 04/13] module: Move latched RB-tree " Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 05/13] module: Move arch strict rwx " Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 06/13] module: Move " Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 07/13] module: Move extra signature support out of core code Aaron Tomlin
2022-02-09 14:28 ` Miroslav Benes
2022-02-09 14:37 ` Aaron Tomlin
2022-01-30 21:32 ` Aaron Tomlin [this message]
2022-01-30 21:32 ` [RFC PATCH v4 09/13] module: Move kallsyms support into a separate file Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 10/13] module: Move procfs " Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 11/13] module: Move sysfs " Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 12/13] module: Move kdb_modules list out of core code Aaron Tomlin
2022-01-30 21:32 ` [RFC PATCH v4 13/13] module: Move version support into a separate file Aaron Tomlin
2022-02-01 16:44 ` [RFC PATCH v4 00/13] module: core code clean up Allen
2022-02-05 20:33 ` Aaron Tomlin
2022-02-02 2:44 ` Luis Chamberlain
2022-02-06 14:40 ` Aaron Tomlin
2022-02-03 0:20 ` Luis Chamberlain
2022-02-03 7:48 ` Christophe Leroy
2022-02-06 14:45 ` Aaron Tomlin
2022-02-03 18:01 ` Christophe Leroy
2022-02-06 16:54 ` Aaron Tomlin
2022-02-07 16:46 ` Aaron Tomlin
2022-02-07 17:17 ` Christophe Leroy
2022-02-07 18:01 ` Aaron Tomlin
2022-02-08 7:50 ` Christophe Leroy
2022-02-08 10:05 ` Aaron Tomlin
2022-02-03 18:15 ` Christophe Leroy
2022-02-06 16:57 ` Aaron Tomlin
2022-02-03 19:43 ` Michal Suchánek
2022-02-03 20:13 ` Luis Chamberlain
2022-02-03 20:10 ` Luis Chamberlain
2022-02-06 17:00 ` Aaron Tomlin
2022-02-06 14:42 ` Aaron Tomlin
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