From: Andrey Ryabinin <[email protected]>

This patch enable kernel address sanitizer for ARM.

Acked-by: Dmitry Vyukov <[email protected]>
Signed-off-by: Abbott Liu <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>
---
 Documentation/dev-tools/kasan.rst | 4 ++--
 arch/arm/Kconfig                  | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/dev-tools/kasan.rst 
b/Documentation/dev-tools/kasan.rst
index b72d07d70239..a9cb1feec0c1 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -21,8 +21,8 @@ global variables yet.
 
 Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later.
 
-Currently generic KASAN is supported for the x86_64, arm64, xtensa and s390
-architectures, and tag-based KASAN is supported only for arm64.
+Currently generic KASAN is supported for the x86_64, arm, arm64, xtensa and
+s390 architectures, and tag-based KASAN is supported only for arm64.
 
 Usage
 -----
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8869742a85df..5c98431ddaea 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -59,6 +59,7 @@ config ARM
        select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
        select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
        select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
+       select HAVE_ARCH_KASAN if MMU
        select HAVE_ARCH_MMAP_RND_BITS if MMU
        select HAVE_ARCH_SECCOMP_FILTER if AEABI && !OABI_COMPAT
        select HAVE_ARCH_THREAD_STRUCT_WHITELIST
-- 
2.17.1

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