Kconfig.debug: disable CONFIG_FRAME_WARN for KMSAN by default

KMSAN adds a lot of instrumentation to the code, which results in increased stack usage (up to 2048 bytes and more in some cases). It's hard to predict how big the stack frames can be, so we disable the warnings for KMSAN instead. Link: https://lkml.kernel.org/r/[email protected] Link: google/kmsan#89 Signed-off-by: Alexander Potapenko <[email protected]> Cc: Kees Cook <[email protected]> Cc: Masahiro Yamada <[email protected]> Cc: Nick Desaulniers <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
niw · Oct 28, 2022 · 921757b · 921757b
1 parent 42855f5
commit 921757b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
@@ -400,8 +400,9 @@ config FRAME_WARN
 	default 1536 if (!64BIT && XTENSA)
 	default 1024 if !64BIT
 	default 2048 if 64BIT
+	default 0 if KMSAN
 	help
-	  Tell gcc to warn at build time for stack frames larger than this.
+	  Tell the compiler to warn at build time for stack frames larger than this.
 	  Setting this too low will cause a lot of warnings.
 	  Setting it to 0 disables the warning.