linux-kernel - Re: [PATCH] kasan: move tests to mm/kasan/

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Message-ID: <CANpmjNN2T=uufbrj3ghr7S6k5E=YxvNpkq2Qa8qCY9NfPeeRsg@mail.gmail.com>
Date:   Tue, 6 Sep 2022 08:00:00 +0200
From:   Marco Elver <elver@...gle.com>
To:     andrey.konovalov@...ux.dev
Cc:     Alexander Potapenko <glider@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: [PATCH] kasan: move tests to mm/kasan/

On Tue, 6 Sept 2022 at 00:18, <andrey.konovalov@...ux.dev> wrote:
>
> From: Andrey Konovalov <andreyknvl@...gle.com>
>
> Move KASAN tests to mm/kasan/ to keep the test code alongside the
> implementation.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>

Reviewed-by: Marco Elver <elver@...gle.com>

Thanks - this is overdue, and follows what newer KUnit tests do.

> ---
>  MAINTAINERS                                             | 1 -
>  lib/Makefile                                            | 5 -----
>  mm/kasan/Makefile                                       | 8 ++++++++
>  lib/test_kasan.c => mm/kasan/kasan_test.c               | 2 +-
>  lib/test_kasan_module.c => mm/kasan/kasan_test_module.c | 2 +-
>  5 files changed, 10 insertions(+), 8 deletions(-)
>  rename lib/test_kasan.c => mm/kasan/kasan_test.c (99%)
>  rename lib/test_kasan_module.c => mm/kasan/kasan_test_module.c (99%)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 589517372408..31b3e4b11e01 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -10938,7 +10938,6 @@ F:      arch/*/include/asm/*kasan.h
>  F:     arch/*/mm/kasan_init*
>  F:     include/linux/kasan*.h
>  F:     lib/Kconfig.kasan
> -F:     lib/test_kasan*.c
>  F:     mm/kasan/
>  F:     scripts/Makefile.kasan
>
> diff --git a/lib/Makefile b/lib/Makefile
> index ffabc30a27d4..928d7605c35c 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -65,11 +65,6 @@ obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o
>  obj-$(CONFIG_TEST_SIPHASH) += test_siphash.o
>  obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o
>  obj-$(CONFIG_TEST_IDA) += test_ida.o
> -obj-$(CONFIG_KASAN_KUNIT_TEST) += test_kasan.o
> -CFLAGS_test_kasan.o += -fno-builtin
> -CFLAGS_test_kasan.o += $(call cc-disable-warning, vla)
> -obj-$(CONFIG_KASAN_MODULE_TEST) += test_kasan_module.o
> -CFLAGS_test_kasan_module.o += -fno-builtin
>  obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o
>  CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla)
>  UBSAN_SANITIZE_test_ubsan.o := y
> diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile
> index 1f84df9c302e..d4837bff3b60 100644
> --- a/mm/kasan/Makefile
> +++ b/mm/kasan/Makefile
> @@ -35,7 +35,15 @@ CFLAGS_shadow.o := $(CC_FLAGS_KASAN_RUNTIME)
>  CFLAGS_hw_tags.o := $(CC_FLAGS_KASAN_RUNTIME)
>  CFLAGS_sw_tags.o := $(CC_FLAGS_KASAN_RUNTIME)
>
> +CFLAGS_KASAN_TEST := $(CFLAGS_KASAN) -fno-builtin $(call cc-disable-warning, vla)
> +
> +CFLAGS_kasan_test.o := $(CFLAGS_KASAN_TEST)
> +CFLAGS_kasan_test_module.o := $(CFLAGS_KASAN_TEST)
> +
>  obj-y := common.o report.o
>  obj-$(CONFIG_KASAN_GENERIC) += init.o generic.o report_generic.o shadow.o quarantine.o
>  obj-$(CONFIG_KASAN_HW_TAGS) += hw_tags.o report_hw_tags.o tags.o report_tags.o
>  obj-$(CONFIG_KASAN_SW_TAGS) += init.o report_sw_tags.o shadow.o sw_tags.o tags.o report_tags.o
> +
> +obj-$(CONFIG_KASAN_KUNIT_TEST) += kasan_test.o
> +obj-$(CONFIG_KASAN_MODULE_TEST) += kasan_test_module.o
> diff --git a/lib/test_kasan.c b/mm/kasan/kasan_test.c
> similarity index 99%
> rename from lib/test_kasan.c
> rename to mm/kasan/kasan_test.c
> index 505f77ffad27..f25692def781 100644
> --- a/lib/test_kasan.c
> +++ b/mm/kasan/kasan_test.c
> @@ -25,7 +25,7 @@
>
>  #include <kunit/test.h>
>
> -#include "../mm/kasan/kasan.h"
> +#include "kasan.h"
>
>  #define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_GRANULE_SIZE)
>
> diff --git a/lib/test_kasan_module.c b/mm/kasan/kasan_test_module.c
> similarity index 99%
> rename from lib/test_kasan_module.c
> rename to mm/kasan/kasan_test_module.c
> index b112cbc835e9..e4ca82dc2c16 100644
> --- a/lib/test_kasan_module.c
> +++ b/mm/kasan/kasan_test_module.c
> @@ -13,7 +13,7 @@
>  #include <linux/slab.h>
>  #include <linux/uaccess.h>
>
> -#include "../mm/kasan/kasan.h"
> +#include "kasan.h"
>
>  static noinline void __init copy_user_test(void)
>  {
> --
> 2.25.1
>