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| author | Alexander Potapenko <glider@google.com> | 2022-10-24 23:21:42 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-28 13:37:23 -0700 |
| commit | 921757bc9b611efc483a548b86769934384e9c79 (patch) | |
| tree | 85ef0146942744d92cbeb5d0148dd7b458468693 | |
| parent | 42855f588e187a6f22978e54422adbc010ac7630 (diff) | |
| download | linux-stable-921757bc9b611efc483a548b86769934384e9c79.tar.gz linux-stable-921757bc9b611efc483a548b86769934384e9c79.tar.bz2 linux-stable-921757bc9b611efc483a548b86769934384e9c79.zip | |
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/20221024212144.2852069-3-glider@google.com
Link: https://github.com/google/kmsan/issues/89
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | lib/Kconfig.debug | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 3fc7abffc7aa..29280072dc0e 100644 --- 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. |