linux-kernel - [PATCH] lib/Kconfig.debug: disable FRAME

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Date:   Wed, 18 Oct 2023 14:24:11 -0400
From:   Hamza Mahfooz <hamza.mahfooz@....com>
To:     <linux-kernel@...r.kernel.org>
CC:     Rodrigo Siqueira <rodrigo.siqueira@....com>,
        Harry Wentland <harry.wentland@....com>,
        Alex Deucher <alexander.deucher@....com>,
        "Arnd Bergmann" <arnd@...db.de>,
        Hamza Mahfooz <hamza.mahfooz@....com>,
        <stable@...r.kernel.org>, Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        "Boqun Feng" <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Nick Terrell <terrelln@...com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Zhaoyang Huang <zhaoyang.huang@...soc.com>,
        Li Hua <hucool.lihua@...wei.com>,
        Alexander Potapenko <glider@...gle.com>,
        "Geert Uytterhoeven" <geert+renesas@...der.be>,
        Rae Moar <rmoar@...gle.com>, <rust-for-linux@...r.kernel.org>,
        <bpf@...r.kernel.org>, <llvm@...ts.linux.dev>
Subject: [PATCH] lib/Kconfig.debug: disable FRAME_WARN for kasan and kcsan

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@...r.kernel.org
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@....com>
---
 lib/Kconfig.debug | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 39d1d93164bd..15ad742729ca 100644
--- 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
 	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
-- 
2.42.0