When unwinding stack traces, the kernel may pick uninitialized data from the stack. To avoid false reports on that data, we do not instrument stacktrace.c Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx> --- Link: https://linux-review.googlesource.com/id/Iadb72036ff6868b1d7c9f1ed6630a66be6c57a42 --- kernel/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/Makefile b/kernel/Makefile index 80f6cfb60c020..1147f0bd6e022 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -40,6 +40,11 @@ KASAN_SANITIZE_kcov.o := n KCSAN_SANITIZE_kcov.o := n UBSAN_SANITIZE_kcov.o := n KMSAN_SANITIZE_kcov.o := n + +# Code in stactrace.c may branch on random values taken from the stack. +# Prevent KMSAN false positives by not instrumenting this file. +KMSAN_SANITIZE_stacktrace.o := n + CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector # Don't instrument error handlers -- 2.35.1.1021.g381101b075-goog
