From 60a83b77a98aeb52dd1cb262febee0e15a99f302 Mon Sep 17 00:00:00 2001 From: Alexander Popov Date: Thu, 24 Jan 2019 10:43:58 +0300 Subject: [PATCH] Update the README and comments after adding ARM support --- README.md | 19 ++++++++++++------- kconfig-hardened-check.py | 6 ++---- 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/README.md b/README.md index 50fec8e..4a8f2ed 100644 --- a/README.md +++ b/README.md @@ -9,31 +9,36 @@ make our systems more secure. But nobody likes checking configs manually. So let the computers do their job! __kconfig-hardened-check.py__ helps me to check the Linux kernel Kconfig option list -against my hardening preferences for `x86_64`, which are based on the +against my hardening preferences, which are based on the [KSPP recommended settings][1] and last public [grsecurity][2] patch (options which they disable). Please don't cry if my Python code looks like C. I'm just a kernel developer. -__TODO:__ add hardening preferences for ARM. +## Supported microarchitectures + + - X86_64 + - X86_32 + - ARM64 + - ARM ## Script output examples ### Usage ``` -#./kconfig-hardened-check.py -usage: kconfig-hardened-check.py [-h] [-p {X86_64,X86_32,ARM64}] [-c CONFIG] - [--debug] +#usage: kconfig-hardened-check.py [-h] [-p {X86_64,X86_32,ARM64,ARM}] + [-c CONFIG] [--debug] Checks the hardening options in the Linux kernel config optional arguments: -h, --help show this help message and exit - -p {X86_64,X86_32,ARM64}, --print {X86_64,X86_32,ARM64} + -p {X86_64,X86_32,ARM64,ARM}, --print {X86_64,X86_32,ARM64,ARM} print hardening preferences for selected architecture -c CONFIG, --config CONFIG check the config_file against these preferences --debug enable internal debug mode + ``` ### Script output for `Ubuntu 18.04 (Bionic Beaver)` kernel config @@ -47,7 +52,6 @@ optional arguments: CONFIG_BUG | y |defconfig | self_protection || OK CONFIG_STRICT_KERNEL_RWX | y |defconfig | self_protection || OK CONFIG_STACKPROTECTOR_STRONG | y |defconfig | self_protection ||CONFIG_CC_STACKPROTECTOR_STRONG: OK ("y") - CONFIG_THREAD_INFO_IN_TASK | y |defconfig | self_protection || OK CONFIG_SLUB_DEBUG | y |defconfig | self_protection || OK CONFIG_STRICT_MODULE_RWX | y |defconfig | self_protection || OK CONFIG_PAGE_TABLE_ISOLATION | y |defconfig | self_protection || OK @@ -58,6 +62,7 @@ optional arguments: CONFIG_X86_INTEL_UMIP | y |defconfig | self_protection || OK CONFIG_SYN_COOKIES | y |defconfig | self_protection || OK CONFIG_VMAP_STACK | y |defconfig | self_protection || OK + CONFIG_THREAD_INFO_IN_TASK | y |defconfig | self_protection || OK CONFIG_BUG_ON_DATA_CORRUPTION | y | kspp | self_protection || FAIL: "is not set" CONFIG_DEBUG_WX | y | kspp | self_protection || OK CONFIG_SCHED_STACK_END_CHECK | y | kspp | self_protection || OK diff --git a/kconfig-hardened-check.py b/kconfig-hardened-check.py index 35bcad7..3ed0f9e 100755 --- a/kconfig-hardened-check.py +++ b/kconfig-hardened-check.py @@ -2,7 +2,8 @@ # # This script helps me to check the Linux kernel Kconfig option list -# against my hardening preferences for x86_64. Let the computers do their job! +# against my hardening preferences for X86_64, ARM64, X86_32, and ARM. +# Let the computers do their job! # # Author: Alexander Popov # @@ -25,9 +26,6 @@ # # N.B. Hardening sysctl's: # net.core.bpf_jit_harden -# -# -# TODO: add hardening preferences for ARM import sys from argparse import ArgumentParser -- 2.31.1