[PATCH 04/13] powerpc: Disable CONFIG_DCACHE_WORD_ACCESS when KMSAN is enabled
From: Nicholas Miehlbradt <hidden>
Date: 2023-12-14 05:57:01
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Word sized accesses may read uninitialized data when optimizing loads. Disable this optimization when KMSAN is enabled to prevent false positives. Signed-off-by: Nicholas Miehlbradt <redacted> --- arch/powerpc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 6f105ee4f3cf..e33e3250c478 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -182,7 +182,7 @@ config PPC select BUILDTIME_TABLE_SORT select CLONE_BACKWARDS select CPUMASK_OFFSTACK if NR_CPUS >= 8192 - select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN + select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN && !KMSAN select DMA_OPS_BYPASS if PPC64 select DMA_OPS if PPC64 select DYNAMIC_FTRACE if FUNCTION_TRACER
--
2.40.1