s390/kasan: avoid instrumentation of early C code

[ Upstream commit 0a9b40911baffac6fc9cc2d88e893585870a97f7 ]

Instrumented C code cannot run without the kasan shadow area. Exempt
source code files from kasan which are running before / used during
kasan initialization.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index 9e6668e..f6a9b0c 100644 (file)
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -6,6 +6,7 @@
 KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)

diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index b375c6c..9b3d821 100644 (file)
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -8,6 +8,7 @@
 KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
 obj-y  := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
 targets        := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index b205c0f..762fc45 100644 (file)
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -23,6 +23,8 @@ KCOV_INSTRUMENT_early_nobss.o := n
 UBSAN_SANITIZE_early.o         := n
 UBSAN_SANITIZE_early_nobss.o   := n
 
+KASAN_SANITIZE_early_nobss.o   := n
+
 #
 # Passing null pointers is ok for smp code, since we access the lowcore here.
 #

diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index c6ab34f..3072b89 100644 (file)
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -11,6 +11,7 @@ endif
 GCOV_PROFILE_sclp_early_core.o         := n
 KCOV_INSTRUMENT_sclp_early_core.o      := n
 UBSAN_SANITIZE_sclp_early_core.o       := n
+KASAN_SANITIZE_sclp_early_core.o       := n
 
 CFLAGS_sclp_early_core.o               += -D__NO_FORTIFY