All architectures at least double stack size when using one of the KASAN software modes that rely on compiler instrumentation. Until now, warnings emitted by -Wframe-larger-than could easily be ignored, as we would still get a working kernel. However, with the introduction of -Werror (CONFIG_WERROR=y), it makes sense to at least double the -Wframe-larger-than threshold for software-based KASAN modes to reflect the already increased stack sizes when building a kernel with KASAN enabled. Link: https://lkml.kernel.org/r/YTbOs13waorzamZ6@Ryzen-9-3900X.localdomain Signed-off-by: Marco Elver <elver@xxxxxxxxxx> --- lib/Kconfig.debug | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index ed4a31e34098..2055bbb6724a 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -345,6 +345,8 @@ endif # DEBUG_INFO config FRAME_WARN int "Warn for stack frames larger than" range 0 8192 + default 4096 if 64BIT && (KASAN_GENERIC || KASAN_SW_TAGS) + default 2048 if !64BIT && (KASAN_GENERIC || KASAN_SW_TAGS) default 2048 if GCC_PLUGIN_LATENT_ENTROPY default 1536 if (!64BIT && PARISC) default 1024 if (!64BIT && !PARISC) -- 2.33.0.153.gba50c8fa24-goog
