linux-kernel - Re: [PATCH 1/2] kernel: kcsan: kcsan_test: build without structleak plugin

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Message-ID: <CANpmjNP8-jDPXJVy68zhkspEac8vutfpTAc1nytnyExSpsT-jA@mail.gmail.com>
Date:   Mon, 28 Nov 2022 15:27:44 +0100
From:   Marco Elver <elver@...gle.com>
To:     Anders Roxell <anders.roxell@...aro.org>
Cc:     kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        akpm@...ux-foundation.org, keescook@...omium.org,
        davidgow@...gle.com, Jason@...c4.com, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 1/2] kernel: kcsan: kcsan_test: build without structleak plugin

On Mon, 28 Nov 2022 at 11:44, Anders Roxell <anders.roxell@...aro.org> wrote:
>
> Building kcsan_test with strucleak plugin enabled makes the stack frame
> size to grow.
>
> kernel/kcsan/kcsan_test.c:704:1: error: the frame size of 3296 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
>
> Turn off the structleak plugin checks for kcsan_test.
>
> Suggested-by: Arnd Bergmann <arnd@...db.de>
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>

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

> ---
>  kernel/kcsan/Makefile | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/kernel/kcsan/Makefile b/kernel/kcsan/Makefile
> index 4f35d1bced6a..8cf70f068d92 100644
> --- a/kernel/kcsan/Makefile
> +++ b/kernel/kcsan/Makefile
> @@ -17,4 +17,5 @@ KCSAN_INSTRUMENT_BARRIERS_selftest.o := y
>  obj-$(CONFIG_KCSAN_SELFTEST) += selftest.o
>
>  CFLAGS_kcsan_test.o := $(CFLAGS_KCSAN) -g -fno-omit-frame-pointer
> +CFLAGS_kcsan_test.o += $(DISABLE_STRUCTLEAK_PLUGIN)
>  obj-$(CONFIG_KCSAN_KUNIT_TEST) += kcsan_test.o
> --
> 2.35.1
>