linux-kernel - [PATCH 6/6] Enable KASan for arm

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Date:   Thu, 12 Apr 2018 20:54:11 +0800
From:   Abbott Liu <liuwenliang@...wei.com>
To:     <aryabinin@...tuozzo.com>, <glider@...gle.com>,
        <dvyukov@...gle.com>, <corbet@....net>, <linux@...linux.org.uk>,
        <cdall@...nel.org>, <marc.zyngier@....com>, <arnd@...db.de>,
        <nicolas.pitre@...aro.org>, <vladimir.murzin@....com>,
        <mingo@...nel.org>, <viro@...iv.linux.org.uk>,
        <alexandre.belloni@...tlin.com>, <ard.biesheuvel@...aro.org>,
        <daniel.lezcano@...aro.org>, <pombredanne@...b.com>,
        <kstewart@...uxfoundation.org>, <liuwenliang@...wei.com>,
        <gregkh@...uxfoundation.org>, <f.fainelli@...il.com>,
        <mawilcox@...rosoft.com>, <akpm@...ux-foundation.org>,
        <mark.rutland@....com>, <afzal.mohd.ma@...il.com>,
        <alexander.levin@...izon.com>, <tglx@...utronix.de>,
        <thgarnie@...gle.com>, <dhowells@...hat.com>,
        <keescook@...omium.org>, <geert@...ux-m68k.org>, <tixy@...aro.org>,
        <julien.thierry@....com>, <james.morse@....com>,
        <zhichao.huang@...aro.org>, <jinb.park7@...il.com>,
        <labbott@...hat.com>, <philip@....systems>,
        <grygorii.strashko@...aro.org>, <opendmb@...il.com>,
        <mhocko@...e.com>, <kirill.shutemov@...ux.intel.com>,
        <kasan-dev@...glegroups.com>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <kvmarm@...ts.cs.columbia.edu>
Subject: [PATCH 6/6] Enable KASan for arm

From: Andrey Ryabinin <a.ryabinin@...sung.com>

This patch enable kernel address sanitizer for arm.

Cc: Andrey Ryabinin <a.ryabinin@...sung.com>
Acked-by: Dmitry Vyukov <dvyukov@...gle.com>
Tested-by: Joel Stanley <joel@....id.au>
Tested-by: Florian Fainelli <f.fainelli@...il.com>
Tested-by: Abbott Liu <liuwenliang@...wei.com>
Signed-off-by: Abbott Liu <liuwenliang@...wei.com>
---
 Documentation/dev-tools/kasan.rst | 2 +-
 arch/arm/Kconfig                  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index f7a18f2..d92120d 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -12,7 +12,7 @@ KASAN uses compile-time instrumentation for checking every memory access,
 therefore you will need a GCC version 4.9.2 or later. GCC 5.0 or later is
 required for detection of out-of-bounds accesses to stack or global variables.
 
-Currently KASAN is supported only for the x86_64 and arm64 architectures.
+Currently KASAN is supported only for the x86_64, arm64 and arm architectures.
 
 Usage
 -----
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1878083..cd71bea 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -49,6 +49,7 @@ 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
-- 
2.9.0