mobile-apps/.github/workflows/fuzz.yml at main · Reflective-Lab/mobile-apps · GitHub

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name: Fuzz

# Fuzzing the untrusted-input seam (QF-2026-06-24-06). Three modes:
#   - pull_request (paths-scoped): a short, time-boxed smoke of the hottest target
#     so a regression that crashes a known input surfaces on the PR, not overnight.
#   - schedule (nightly) + workflow_dispatch: the full matrix, longer runs.
# Every run reads the committed seed corpus (seeds/<target>) and writes any new
# units to the scratch corpus/<target> (gitignored). A discovered crash fails the
# job and uploads the reproducer as an artifact.
on:
  schedule:
    - cron: "0 4 * * *" # 04:00 UTC nightly
  workflow_dispatch:
    inputs:
      max_total_time:
        description: Seconds to fuzz each target
        default: "120"
  pull_request:
    # Only when the fuzzed code (or the harness itself) changes — keeps the
    # nightly-toolchain + cargo-fuzz build off unrelated PRs.
    paths:
      - "crates/mobile-core/**"
      - "apps/marquee/quorum-sense/ffi/**"
      - ".github/workflows/fuzz.yml"

permissions:
  contents: read

env:
  CARGO_TERM_COLOR: always

jobs:
  smoke:
    # PR-time guard: the hottest target only, time-boxed, replaying the seed
    # corpus so a known-good input that now panics fails the PR immediately.
    name: cargo-fuzz smoke (draft_field_signal)
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    timeout-minutes: 15
    defaults:
      run:
        working-directory: reflective/mobile-apps
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          sparse-checkout: |
            .github/actions/checkout-helms-deps
          sparse-checkout-cone-mode: false

      - uses: ./.github/actions/checkout-helms-deps

      - name: Install nightly toolchain
        run: rustup toolchain install nightly --profile minimal

      - name: Install cargo-fuzz
        run: cargo install cargo-fuzz --locked

      - name: Smoke draft_field_signal (bounded, seed corpus)
        working-directory: reflective/mobile-apps/crates/mobile-core/fuzz
        run: |
          mkdir -p corpus/draft_field_signal
          cargo +nightly fuzz run draft_field_signal \
            corpus/draft_field_signal seeds/draft_field_signal \
            -- -max_total_time=30

      - name: Upload crash reproducer
        if: failure()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: fuzz-smoke-artifacts
          path: reflective/mobile-apps/crates/mobile-core/fuzz/artifacts/
          if-no-files-found: ignore

  fuzz:
    name: cargo-fuzz (mobile-core)
    if: github.event_name != 'pull_request'
    runs-on: ubuntu-latest
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        target: [draft_field_signal, parse_enums, confidence_roundtrip]
    defaults:
      run:
        working-directory: reflective/mobile-apps
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          sparse-checkout: |
            .github/actions/checkout-helms-deps
          sparse-checkout-cone-mode: false

      - uses: ./.github/actions/checkout-helms-deps

      - name: Install nightly toolchain
        run: rustup toolchain install nightly --profile minimal

      - name: Install cargo-fuzz
        run: cargo install cargo-fuzz --locked

      - name: Fuzz ${{ matrix.target }}
        working-directory: reflective/mobile-apps/crates/mobile-core/fuzz
        run: |
          mkdir -p corpus/${{ matrix.target }}
          cargo +nightly fuzz run ${{ matrix.target }} \
            corpus/${{ matrix.target }} seeds/${{ matrix.target }} \
            -- -max_total_time=${{ github.event.inputs.max_total_time || '120' }}

      - name: Upload crash reproducer
        if: failure()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: fuzz-artifacts-${{ matrix.target }}
          path: reflective/mobile-apps/crates/mobile-core/fuzz/artifacts/
          if-no-files-found: ignore