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SubjectRe: [PATCH] lib/Kconfig.debug: disable FRAME_WARN for kasan and kcsan
Hi Hamza,

On Wed, Oct 18, 2023 at 8:24 PM Hamza Mahfooz <hamza.mahfooz@amd.com> wrote:
> With every release of LLVM, both of these sanitizers eat up more and
> more of the stack. So, set FRAME_WARN to 0 if either of them is enabled
> for a given build.
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>

Thanks for your patch!

> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -429,11 +429,10 @@ endif # DEBUG_INFO
> config FRAME_WARN
> int "Warn for stack frames larger than"
> range 0 8192
> - default 0 if KMSAN
> + default 0 if KASAN || KCSAN || KMSAN

Are kernels with KASAN || KCSAN || KMSAN enabled supposed to be bootable?
Stack overflows do cause crashes.

> default 2048 if GCC_PLUGIN_LATENT_ENTROPY
> default 2048 if PARISC
> default 1536 if (!64BIT && XTENSA)
> - default 1280 if KASAN && !64BIT
> default 1024 if !64BIT
> default 2048 if 64BIT
> help

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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