From: Ard Biesheuvel
mainline inclusion
from mainline-5.11-rc1
commit 4d576cab16f57e1f87978f6997a725179398341e
category: feature
feature: ARM KASAN support
issue: #I3ZXZF
CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
-------------------------------------------------
KASAN uses the routines in stacktrace.c to capture the call stack each
time memory gets allocated or freed. Some of these routines are also
used to log CPU and memory context when exceptions are taken, and so
in some cases, memory accesses may be made that are not strictly in
line with the KASAN constraints, and may therefore trigger false KASAN
positives.
So follow the example set by other architectures, and simply disable
KASAN instrumentation for these routines.
Reviewed-by: Linus Walleij
Signed-off-by: Ard Biesheuvel
Signed-off-by: Russell King
(cherry picked from commit 4d576cab16f57e1f87978f6997a725179398341e)
Signed-off-by: Kefeng Wang
Reviewed-by: Jing Xiangfeng
Signed-off-by: Chen Jun
Signed-off-by: Yu Changchun
---
arch/arm/kernel/Makefile | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index 89e5d864e923..f6431b46866e 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -21,6 +21,9 @@ obj-y := elf.o entry-common.o irq.o opcodes.o \
setup.o signal.o sigreturn_codes.o \
stacktrace.o sys_arm.o time.o traps.o
+KASAN_SANITIZE_stacktrace.o := n
+KASAN_SANITIZE_traps.o := n
+
ifneq ($(CONFIG_ARM_UNWIND),y)
obj-$(CONFIG_FRAME_POINTER) += return_address.o
endif
--
2.22.0
