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Date:   Wed, 28 Feb 2018 23:30:37 +0900
From:   Jinbum Park <jinb.park7@...il.com>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com
Cc:     pombredanne@...b.co, gregkh@...uxfoundation.org,
        tglx@...utronix.de, kstewart@...uxfoundation.org,
        luto@...capital.net, dsafonov@...tuozzo.com, keescook@...omium.org,
        will.deacon@....com, mark.rutland@....com, danielmicay@...il.com,
        arnd@...db.de, catalin.marinas@....com
Subject: [kernel-hardening] [PATCH 2/2] arm: Kconfig: Add
 ARCH_HAS_FORTIFY_SOURCE

CONFIG_FORTIFY_SOURCE detects various overflows at compile-time.
(6974f0c4555e ("include/linux/string.h:
add the option of fortified string.h functions)

ARCH_HAS_FORTIFY_SOURCE means that the architecture can be built and
run with CONFIG_FORTIFY_SOURCE.

Since ARM can be built and run with that flag like other architectures,
select ARCH_HAS_FORTIFY_SOURCE as default.

Signed-off-by: Jinbum Park <jinb.park7@...il.com>
---
 arch/arm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7e3d535..3765336 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -7,6 +7,7 @@ config ARM
 	select ARCH_HAS_DEBUG_VIRTUAL if MMU
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAS_ELF_RANDOMIZE
+	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_PHYS_TO_DMA
 	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
-- 
1.9.1

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