Re: [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