A compiler can optimize away memset calls by replacing them with mov instructions. There are KASAN tests, that specifically test that KASAN correctly handles memset calls, we don't want this optimization to happen.
The solution is to add -fno-builtin flag to test_kasan.ko Signed-off-by: Andrey Konovalov <[email protected]> --- lib/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/lib/Makefile b/lib/Makefile index a90d4fcd748f..9c940c4c0593 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o obj-$(CONFIG_TEST_SYSCTL) += test_sysctl.o obj-$(CONFIG_TEST_HASH) += test_hash.o test_siphash.o obj-$(CONFIG_TEST_KASAN) += test_kasan.o +CFLAGS_test_kasan.o += -fno-builtin obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o obj-$(CONFIG_TEST_LKM) += test_module.o -- 2.16.2.395.g2e18187dfd-goog
