2022-11-28 11:26:34

by Anders Roxell

Subject: [PATCH 1/2] kernel: kcsan: kcsan_test: build without structleak plugin

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 <[email protected]>
Signed-off-by: Anders Roxell <[email protected]>
---
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

2022-11-28 14:45:05

by Marco Elver

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

On Mon, 28 Nov 2022 at 11:44, Anders Roxell <[email protected]> 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 <[email protected]>
> Signed-off-by: Anders Roxell <[email protected]>

Acked-by: Marco Elver <[email protected]>

> ---
> 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
>