2017-03-04 18:37:50 +00:00
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From 6dfa60daaa0966a8e414ab0a7fd002a99001920a Mon Sep 17 00:00:00 2001
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2017-02-07 20:07:54 +00:00
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From: Electron752 <mzoran@crowfest.net>
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Date: Sat, 14 Jan 2017 02:54:26 -0800
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Subject: [PATCH] ARM64: Enable Kernel Address Space Randomization (#1792)
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Randomization allows the mapping between virtual addresses and physical
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address to be different on each boot. This makes it more difficult
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to exploit security vulnerabilities that require knowledge of fixed
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hardware addresses.
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The firmware generates a 8 byte random number during bootup and stores
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it in the device tree under chosen/kaslr-seed. This number is used
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to randomize the address mapping.
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This change enables this feature in the build configuration for ARM64.
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Signed-off-by: Michael Zoran <mzoran@crowfest.net>
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---
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arch/arm64/configs/bcmrpi3_defconfig | 1 +
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1 file changed, 1 insertion(+)
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--- a/arch/arm64/configs/bcmrpi3_defconfig
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+++ b/arch/arm64/configs/bcmrpi3_defconfig
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@@ -53,6 +53,7 @@ CONFIG_ARMV8_DEPRECATED=y
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CONFIG_SWP_EMULATION=y
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CONFIG_CP15_BARRIER_EMULATION=y
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CONFIG_SETEND_EMULATION=y
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+CONFIG_RANDOMIZE_BASE=y
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CONFIG_CMDLINE="console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
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CONFIG_BINFMT_MISC=y
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CONFIG_COMPAT=y
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