From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Subject: kasan: consistently disable debugging features KASAN is incompatible with some kernel debugging/tracing features. There's been multiple patches that disable those feature for some of KASAN files one by one. Instead of prolonging that, disable these features for all KASAN files at once. Link: http://lkml.kernel.org/r/29bd753d5ff5596425905b0b07f51153e2345cc1.1589297433.git.andreyknvl@xxxxxxxxxx Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Leon Romanovsky <leonro@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/kasan/Makefile | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) --- a/mm/kasan/Makefile~kasan-consistently-disable-debugging-features +++ a/mm/kasan/Makefile @@ -1,23 +1,28 @@ # SPDX-License-Identifier: GPL-2.0 KASAN_SANITIZE := n -UBSAN_SANITIZE_common.o := n -UBSAN_SANITIZE_generic.o := n -UBSAN_SANITIZE_generic_report.o := n -UBSAN_SANITIZE_tags.o := n +UBSAN_SANITIZE := n KCOV_INSTRUMENT := n +# Disable ftrace to avoid recursion. CFLAGS_REMOVE_common.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_generic.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_generic_report.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_init.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_quarantine.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_report.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_tags.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_tags_report.o = $(CC_FLAGS_FTRACE) # Function splitter causes unnecessary splits in __asan_load1/__asan_store1 # see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63533 - CFLAGS_common.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_generic.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_generic_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_init.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_quarantine.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) CFLAGS_tags.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) +CFLAGS_tags_report.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector) obj-$(CONFIG_KASAN) := common.o init.o report.o obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o _
