[PATCH 2/4] efi/runtime-wrappers, kasan: don't sanitize runtime wrappers.

[Andrey Ryabinin]

ARM64 maps efi runtime services in userspace addresses
which don't have KASAN shadow. So dereferencing these addresses
in efi_call_virt() will cause crash if this code instrumented.

Signed-off-by: Andrey Ryabinin <ryabinin.a.a at gmail.com>
---
 drivers/firmware/efi/Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index 6fd3da9..413fcf2 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -1,6 +1,14 @@
 #
 # Makefile for linux kernel
 #
+
+#
+# ARM64 maps efi runtime services in userspace addresses
+# which don't have KASAN shadow. So dereference of these addresses
+# in efi_call_virt() will cause crash if this code instrumented.
+#
+KASAN_SANITIZE_runtime-wrappers.o	:= n
+
 obj-$(CONFIG_EFI)			+= efi.o vars.o reboot.o
 obj-$(CONFIG_EFI_VARS)			+= efivars.o
 obj-$(CONFIG_EFI_ESRT)			+= esrt.o
-- 
2.4.6