name: Kernel Hardening Analysis
run-name: 'Check kernel security options - PR #${{ github.event.pull_request.number }} ("${{ github.event.pull_request.title }}")'
#
#  Check the Linux kernel options against security hardening
#
#  Attention! Changing security parameters may also affect system performance and functionality of userspace software!
#  More info:
#  https://github.com/a13xp0p0v/kernel-hardening-checker

on:
  workflow_dispatch:

  pull_request:
    types: [ready_for_review, opened, reopened, synchronize]

permissions:
  contents: read

concurrency:
  group: pipeline-security-${{github.event.pull_request.number}}
  cancel-in-progress: true

jobs:
  Analysis:
    name: Check kernel security options
    runs-on: ubuntu-latest
    if: ${{ github.repository_owner == 'Armbian' }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@055970845dd036d7345da7399b7e89f2e10f2b04 # v46.0.3

      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          repository: a13xp0p0v/kconfig-hardened-check
          path: kconfig-hardened-check

      - name: Check kernel config for security issues
        # Run kernel-hardening-checker for each kernel config file excluding RISC-V configs, since they are not supported yet.
        # See https://github.com/a13xp0p0v/kernel-hardening-checker/issues/56
        # sed explanation: 1) Put spaces in front of every line 2) replace colored output with emojis since GitHub Actions job summaries don't support colored output
        run: |
          for file in ${{ steps.changed-files.outputs.all_changed_files }}; do
              if [[ "${file}" = config/kernel/*.config && ! $(head -n 10 "${file}" | grep -q "riscv") ]]; then
                  kconfig-hardened-check/bin/kernel-hardening-checker -m show_fail -c $file | sed 's/^/     /; s/\x1b\[32m/✅ /; s/\x1b\[31m/❌ /; s/\x1b\[0m//' >> $GITHUB_STEP_SUMMARY
              fi
          done