1# SPDX-License-Identifier: GPL-2.0 2ifdef CONFIG_KASAN 3ifdef CONFIG_KASAN_INLINE 4 call_threshold := 10000 5else 6 call_threshold := 0 7endif 8 9KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) 10 11CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address 12 13CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ 14 -fasan-shadow-offset=$(KASAN_SHADOW_OFFSET) \ 15 --param asan-stack=1 --param asan-globals=1 \ 16 --param asan-instrumentation-with-call-threshold=$(call_threshold)) 17 18ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) 19 ifneq ($(CONFIG_COMPILE_TEST),y) 20 $(warning Cannot use CONFIG_KASAN: \ 21 -fsanitize=kernel-address is not supported by compiler) 22 endif 23else 24 ifeq ($(CFLAGS_KASAN),) 25 ifneq ($(CONFIG_COMPILE_TEST),y) 26 $(warning CONFIG_KASAN: compiler does not support all options.\ 27 Trying minimal configuration) 28 endif 29 CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) 30 endif 31endif 32 33CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) 34endif 35