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-rw-r--r--target/linux/brcm2708/patches-4.9/950-0122-ARM64-Enable-Kernel-Address-Space-Randomization-1792.patch31
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0122-ARM64-Enable-Kernel-Address-Space-Randomization-1792.patch b/target/linux/brcm2708/patches-4.9/950-0122-ARM64-Enable-Kernel-Address-Space-Randomization-1792.patch
new file mode 100644
index 0000000000..423db95e9e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/950-0122-ARM64-Enable-Kernel-Address-Space-Randomization-1792.patch
@@ -0,0 +1,31 @@
+From 6dfa60daaa0966a8e414ab0a7fd002a99001920a Mon Sep 17 00:00:00 2001
+From: Electron752 <mzoran@crowfest.net>
+Date: Sat, 14 Jan 2017 02:54:26 -0800
+Subject: [PATCH] ARM64: Enable Kernel Address Space Randomization (#1792)
+
+Randomization allows the mapping between virtual addresses and physical
+address to be different on each boot. This makes it more difficult
+to exploit security vulnerabilities that require knowledge of fixed
+hardware addresses.
+
+The firmware generates a 8 byte random number during bootup and stores
+it in the device tree under chosen/kaslr-seed. This number is used
+to randomize the address mapping.
+
+This change enables this feature in the build configuration for ARM64.
+
+Signed-off-by: Michael Zoran <mzoran@crowfest.net>
+---
+ arch/arm64/configs/bcmrpi3_defconfig | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/arm64/configs/bcmrpi3_defconfig
++++ b/arch/arm64/configs/bcmrpi3_defconfig
+@@ -53,6 +53,7 @@ CONFIG_ARMV8_DEPRECATED=y
+ CONFIG_SWP_EMULATION=y
+ CONFIG_CP15_BARRIER_EMULATION=y
+ CONFIG_SETEND_EMULATION=y
++CONFIG_RANDOMIZE_BASE=y
+ CONFIG_CMDLINE="console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
+ CONFIG_BINFMT_MISC=y
+ CONFIG_COMPAT=y