| Message ID | 20221125092517.3074989-4-lee@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix a bunch of allmodconfig errors | expand |
On Fri, Nov 25, 2022, at 10:25, Lee Jones wrote: > 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. > > Signed-off-by: Lee Jones <lee@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> If this affects only clang but not gcc, I wonder if we could limit the scope and keep the 1024 byte limit on gcc builds. > --- > lib/Kconfig.debug | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug > index c3c0b077ade33..82d475168db95 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -399,6 +399,7 @@ config FRAME_WARN > default 2048 if GCC_PLUGIN_LATENT_ENTROPY This is actually a related bug that we should fix: allmodconfig with gcc turns on GCC_PLUGIN_LATENT_ENTROPY, so the limit ends up being way too high. I think we need to either ensure that allmodconfig turns off the latent entropy plugin, or that the limit gets lowered again to something that is not any higher than the KASAN limit. Arnd
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c3c0b077ade33..82d475168db95 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -399,6 +399,7 @@ config FRAME_WARN 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
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. Signed-off-by: Lee Jones <lee@kernel.org> --- lib/Kconfig.debug | 1 + 1 file changed, 1 insertion(+)