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authorAlexander Potapenko <glider@google.com>2022-11-02 14:06:09 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-11-09 02:57:24 +0300
commitac66998df30a3c2888c077879786a3589ed5170b (patch)
tree3fb29563a3a10c3c10faf1d8edd907b6561fae75 /lib/Kconfig.debug
parent11385b2612004298ac2fbc9877e73f1410cfd3c0 (diff)
downloadlinux-ac66998df30a3c2888c077879786a3589ed5170b.tar.xz
Kconfig.debug: ensure early check for KMSAN in CONFIG_KMSAN_WARN
As pointed out by Masahiro Yamada, Kconfig picks up the first default entry which has true 'if' condition. Hence, the previously added check for KMSAN was never used, because it followed the checks for 64BIT and !64BIT. Put KMSAN check before others to ensure it is always applied. Link: https://lkml.kernel.org/r/20221102110611.1085175-3-glider@google.com Link: https://github.com/google/kmsan/issues/89 Link: https://lore.kernel.org/linux-mm/20221024212144.2852069-3-glider@google.com/ Fixes: 921757bc9b61 ("Kconfig.debug: disable CONFIG_FRAME_WARN for KMSAN by default") Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Kees Cook <keescook@chromium.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Marco Elver <elver@google.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r--lib/Kconfig.debug2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index be69844e40e6..c3c0b077ade3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -395,12 +395,12 @@ endif # DEBUG_INFO
config FRAME_WARN
int "Warn for stack frames larger than"
range 0 8192
+ default 0 if KMSAN
default 2048 if GCC_PLUGIN_LATENT_ENTROPY
default 2048 if PARISC
default 1536 if (!64BIT && XTENSA)
default 1024 if !64BIT
default 2048 if 64BIT
- default 0 if KMSAN
help
Tell the compiler to warn at build time for stack frames larger than this.
Setting this too low will cause a lot of warnings.