linux-kernel - [PATCH v5 6/6] Enable KASan for arm

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Date:   Tue, 5 Jun 2018 14:14:16 +0800
From:   Abbott Liu <liuwenliang@...wei.com>
To:     <aryabinin@...tuozzo.com>, <glider@...gle.com>,
        <dvyukov@...gle.com>, <corbet@....net>, <linux@...linux.org.uk>,
        <christoffer.dall@....com>, <marc.zyngier@....com>,
        <arnd@...db.de>, <nicolas.pitre@...aro.org>,
        <vladimir.murzin@....com>, <keescook@...omium.org>,
        <jinb.park7@...il.com>, <alexandre.belloni@...tlin.com>,
        <ard.biesheuvel@...aro.org>, <daniel.lezcano@...aro.org>,
        <pombredanne@...b.com>, <kstewart@...uxfoundation.org>,
        <liuwenliang@...wei.com>, <rob@...dley.net>,
        <gregkh@...uxfoundation.org>, <f.fainelli@...il.com>,
        <mawilcox@...rosoft.com>, <akpm@...ux-foundation.org>,
        <mark.rutland@....com>, <catalin.marinas@....com>,
        <yamada.masahiro@...ionext.com>, <alexander.levin@...izon.com>,
        <tglx@...utronix.de>, <thgarnie@...gle.com>, <dhowells@...hat.com>,
        <geert@...ux-m68k.org>, <andre.przywara@....com>,
        <julien.thierry@....com>, <drjones@...hat.com>,
        <philip@....systems>, <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>
CC:     <a.ryabinin@...sung.com>, <ryabinin.a.a@...il.com>
Subject: [PATCH v5 6/6] Enable KASan for arm

From: Andrey Ryabinin <ryabinin@...tuozzo.com>

This patch enable kernel address sanitizer for arm.

Cc: Andrey Ryabinin <aryabinin@...tuozzo.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 a7f8e7f..a43a746 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -50,6 +50,7 @@ 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