Merge tag 'hardening-v6.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening fixes from Kees Cook:

 - yama: document function parameter (Christian Göttsche)

 - mm/util: Swap kmemdup_array() arguments (Jean-Philippe Brucker)

 - kunit/overflow: Adjust for __counted_by with DEFINE_RAW_FLEX()

 - MAINTAINERS: Update entries for Kees Cook

* tag 'hardening-v6.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  MAINTAINERS: Update entries for Kees Cook
  kunit/overflow: Adjust for __counted_by with DEFINE_RAW_FLEX()
  yama: document function parameter
  mm/util: Swap kmemdup_array() arguments

Author: torvalds

MAINTAINERS

@@ -5295,7 +5295,7 @@ F:	drivers/infiniband/hw/usnic/
 
 CLANG CONTROL FLOW INTEGRITY SUPPORT
 M:	Sami Tolvanen <samitolvanen@google.com>
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Nathan Chancellor <nathan@kernel.org>
 L:	llvm@lists.linux.dev
 S:	Supported
@@ -8211,7 +8211,7 @@ F:	rust/kernel/net/phy.rs
 
 EXEC & BINFMT API, ELF
 R:	Eric Biederman <ebiederm@xmission.com>
-R:	Kees Cook <keescook@chromium.org>
+R:	Kees Cook <kees@kernel.org>
 L:	linux-mm@kvack.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/execve
@@ -8612,7 +8612,7 @@ S:	Maintained
 F:	drivers/net/ethernet/nvidia/*
 
 FORTIFY_SOURCE
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 L:	linux-hardening@vger.kernel.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
@@ -9102,7 +9102,7 @@ F:	include/linux/mfd/gsc.h
 F:	include/linux/platform_data/gsc_hwmon.h
 
 GCC PLUGINS
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 L:	linux-hardening@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
@@ -9236,7 +9236,7 @@ S:	Maintained
 F:	drivers/input/touchscreen/resistive-adc-touch.c
 
 GENERIC STRING LIBRARY
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Andy Shevchenko <andy@kernel.org>
 L:	linux-hardening@vger.kernel.org
 S:	Supported
@@ -11950,7 +11950,7 @@ F:	scripts/package/
 F:	usr/
 
 KERNEL HARDENING (not covered by other areas)
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Gustavo A. R. Silva <gustavoars@kernel.org>
 L:	linux-hardening@vger.kernel.org
 S:	Supported
@@ -12478,7 +12478,7 @@ F:	drivers/scsi/53c700*
 
 LEAKING_ADDRESSES
 M:	Tycho Andersen <tycho@tycho.pizza>
-R:	Kees Cook <keescook@chromium.org>
+R:	Kees Cook <kees@kernel.org>
 L:	linux-hardening@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
@@ -12774,7 +12774,7 @@ F:	arch/powerpc/platforms/8xx/
 F:	arch/powerpc/platforms/83xx/
 
 LINUX KERNEL DUMP TEST MODULE (LKDTM)
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 S:	Maintained
 F:	drivers/misc/lkdtm/*
 F:	tools/testing/selftests/lkdtm/*
@@ -12904,7 +12904,7 @@ Q:	http://patchwork.linuxtv.org/project/linux-media/list/
 F:	drivers/media/usb/dvb-usb-v2/lmedm04*
 
 LOADPIN SECURITY MODULE
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
 F:	Documentation/admin-guide/LSM/LoadPin.rst
@@ -17996,7 +17996,7 @@ F:	tools/testing/selftests/proc/
 
 PROC SYSCTL
 M:	Luis Chamberlain <mcgrof@kernel.org>
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 M:	Joel Granados <j.granados@samsung.com>
 L:	linux-kernel@vger.kernel.org
 L:	linux-fsdevel@vger.kernel.org
@@ -18052,7 +18052,7 @@ F:	Documentation/devicetree/bindings/net/pse-pd/
 F:	drivers/net/pse-pd/
 
 PSTORE FILESYSTEM
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Tony Luck <tony.luck@intel.com>
 R:	Guilherme G. Piccoli <gpiccoli@igalia.com>
 L:	linux-hardening@vger.kernel.org
@@ -20058,7 +20058,7 @@ F:	drivers/media/cec/platform/seco/seco-cec.c
 F:	drivers/media/cec/platform/seco/seco-cec.h
 
 SECURE COMPUTING
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Andy Lutomirski <luto@amacapital.net>
 R:	Will Drewry <wad@chromium.org>
 S:	Supported
@@ -22972,7 +22972,7 @@ F:	drivers/block/ublk_drv.c
 F:	include/uapi/linux/ublk_cmd.h
 
 UBSAN
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 R:	Marco Elver <elver@google.com>
 R:	Andrey Konovalov <andreyknvl@gmail.com>
 R:	Andrey Ryabinin <ryabinin.a.a@gmail.com>
@@ -24810,7 +24810,7 @@ F:	drivers/net/hamradio/yam*
 F:	include/linux/yam.h
 
 YAMA SECURITY MODULE
-M:	Kees Cook <keescook@chromium.org>
+M:	Kees Cook <kees@kernel.org>
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening
 F:	Documentation/admin-guide/LSM/Yama.rst

drivers/soc/tegra/fuse/fuse-tegra.c

@@ -127,8 +127,8 @@ static void tegra_fuse_print_sku_info(struct tegra_sku_info *tegra_sku_info)
 
 static int tegra_fuse_add_lookups(struct tegra_fuse *fuse)
 {
-	fuse->lookups = kmemdup_array(fuse->soc->lookups, sizeof(*fuse->lookups),
-				      fuse->soc->num_lookups, GFP_KERNEL);
+	fuse->lookups = kmemdup_array(fuse->soc->lookups, fuse->soc->num_lookups,
+				      sizeof(*fuse->lookups), GFP_KERNEL);
 	if (!fuse->lookups)
 		return -ENOMEM;
 

include/linux/string.h

@@ -289,7 +289,7 @@ extern void *kmemdup_noprof(const void *src, size_t len, gfp_t gfp) __realloc_si
 
 extern void *kvmemdup(const void *src, size_t len, gfp_t gfp) __realloc_size(2);
 extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);
-extern void *kmemdup_array(const void *src, size_t element_size, size_t count, gfp_t gfp)
+extern void *kmemdup_array(const void *src, size_t count, size_t element_size, gfp_t gfp)
 		__realloc_size(2, 3);
 
 /* lib/argv_split.c */

lib/fortify_kunit.c

@@ -374,7 +374,7 @@ static const char * const test_strs[] = {
 	for (i = 0; i < ARRAY_SIZE(test_strs); i++) {			\
 		len = strlen(test_strs[i]);				\
 		KUNIT_EXPECT_EQ(test, __builtin_constant_p(len), 0);	\
-		checker(len, kmemdup_array(test_strs[i], len, 1, gfp),	\
+		checker(len, kmemdup_array(test_strs[i], 1, len, gfp),	\
 			kfree(p));					\
 		checker(len, kmemdup(test_strs[i], len, gfp),		\
 			kfree(p));					\

lib/overflow_kunit.c

@@ -1178,14 +1178,28 @@ struct foo {
 	s16 array[] __counted_by(counter);
 };
 
+struct bar {
+	int a;
+	u32 counter;
+	s16 array[];
+};
+
 static void DEFINE_FLEX_test(struct kunit *test)
 {
-	DEFINE_RAW_FLEX(struct foo, two, array, 2);
+	/* Using _RAW_ on a __counted_by struct will initialize "counter" to zero */
+	DEFINE_RAW_FLEX(struct foo, two_but_zero, array, 2);
+#if __has_attribute(__counted_by__)
+	int expected_raw_size = sizeof(struct foo);
+#else
+	int expected_raw_size = sizeof(struct foo) + 2 * sizeof(s16);
+#endif
+	/* Without annotation, it will always be on-stack size. */
+	DEFINE_RAW_FLEX(struct bar, two, array, 2);
 	DEFINE_FLEX(struct foo, eight, array, counter, 8);
 	DEFINE_FLEX(struct foo, empty, array, counter, 0);
 
-	KUNIT_EXPECT_EQ(test, __struct_size(two),
-			sizeof(struct foo) + sizeof(s16) + sizeof(s16));
+	KUNIT_EXPECT_EQ(test, __struct_size(two_but_zero), expected_raw_size);
+	KUNIT_EXPECT_EQ(test, __struct_size(two), sizeof(struct bar) + 2 * sizeof(s16));
 	KUNIT_EXPECT_EQ(test, __struct_size(eight), 24);
 	KUNIT_EXPECT_EQ(test, __struct_size(empty), sizeof(struct foo));
 }

mm/util.c

@@ -139,14 +139,14 @@ EXPORT_SYMBOL(kmemdup_noprof);
  * kmemdup_array - duplicate a given array.
  *
  * @src: array to duplicate.
- * @element_size: size of each element of array.
  * @count: number of elements to duplicate from array.
+ * @element_size: size of each element of array.
  * @gfp: GFP mask to use.
  *
  * Return: duplicated array of @src or %NULL in case of error,
  * result is physically contiguous. Use kfree() to free.
  */
-void *kmemdup_array(const void *src, size_t element_size, size_t count, gfp_t gfp)
+void *kmemdup_array(const void *src, size_t count, size_t element_size, gfp_t gfp)
 {
 	return kmemdup(src, size_mul(element_size, count), gfp);
 }

security/yama/yama_lsm.c

@@ -111,6 +111,7 @@ static void report_access(const char *access, struct task_struct *target,
 
 /**
  * yama_relation_cleanup - remove invalid entries from the relation list
+ * @work: unused
  *
  */
 static void yama_relation_cleanup(struct work_struct *work)