[PATCH v5.10 1/1] Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled

[PATCH v5.10 1/1] Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled

[Lee Jones]

commit 152fe65f300e1819d59b80477d3e0999b4d5d7d2 upstream.

When enabled, KASAN enlarges function's stack-frames.  Pushing quite a few
over the current threshold.  This can mainly be seen on 32-bit
architectures where the present limit (when !GCC) is a lowly 1024-Bytes.

Link: https://lkml.kernel.org/r/20221125120750.3537134-3-lee@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Tom Rix <trix@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[Lee: Back-ported to linux-5.10.y]
Signed-off-by: Lee Jones <lee@kernel.org>
---
 lib/Kconfig.debug | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ce796ca869c22..ea0628a0116d0 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -298,6 +298,7 @@ config FRAME_WARN
 	int "Warn for stack frames larger than"
 	range 0 8192
 	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
+	default 1280 if KASAN && !64BIT
 	default 1280 if (!64BIT && PARISC)
 	default 1024 if (!64BIT && !PARISC)
 	default 2048 if 64BIT
-- 
2.39.0.rc0.267.gcb52ba06e7-goog