ci: turn on ClusterFuzzLite

.clusterfuzzlite/Dockerfile

@@ -0,0 +1,9 @@
+FROM gcr.io/oss-fuzz-base/base-builder:v1
+RUN apt-get update && \
+    apt-get install -y pkg-config make autoconf autopoint zlib1g-dev flex bison gawk
+COPY . $SRC/elfutils
+RUN git clone --depth 1 https://github.com/google/oss-fuzz && \
+    cp oss-fuzz/projects/elfutils/build.sh $SRC/ && \
+    cp oss-fuzz/projects/elfutils/fuzz-dwfl-core.c $SRC/ && \
+    cp oss-fuzz/projects/elfutils/fuzz-dwfl-core_seed_corpus.zip $SRC/
+WORKDIR elfutils

.clusterfuzzlite/project.yaml

@@ -0,0 +1 @@
+language: c

.github/workflows/cflite_build.yml

@@ -0,0 +1,24 @@
+name: ClusterFuzzLite continuous builds
+on:
+  push:
+    branches: [main]
+
+permissions: read-all
+
+jobs:
+  Build:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: ${{ github.workflow }}-${{ matrix.sanitizer }}-${{ github.ref }}
+      cancel-in-progress: true
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined, memory]
+    steps:
+    - name: Build Fuzzers (${{ matrix.sanitizer }})
+      id: build
+      uses: google/clusterfuzzlite/actions/build_fuzzers@v1
+      with:
+        sanitizer: ${{ matrix.sanitizer }}
+        upload-build: true

.github/workflows/cflite_pr.yml

@@ -0,0 +1,31 @@
+name: ClusterFuzzLite PR fuzzing
+on:
+  pull_request:
+    branches: [main]
+
+permissions: read-all
+
+jobs:
+  PR:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: ${{ github.workflow }}-${{ matrix.sanitizer }}-${{ github.ref }}
+      cancel-in-progress: true
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined, memory]
+    steps:
+    - name: Build Fuzzers (${{ matrix.sanitizer }})
+      id: build
+      uses: google/clusterfuzzlite/actions/build_fuzzers@v1
+      with:
+        sanitizer: ${{ matrix.sanitizer }}
+    - name: Run Fuzzers (${{ matrix.sanitizer }})
+      id: run
+      uses: google/clusterfuzzlite/actions/run_fuzzers@v1
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        fuzz-seconds: 180
+        mode: 'code-change'
+        sanitizer: ${{ matrix.sanitizer }}