[etcd] Initial integration (#5953)

* [etcd] Initial integration

* Add ReadAll() to fuzzer

* Change wording

* Add maintainer email

projects/etcd/Dockerfile

@@ -0,0 +1,20 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+RUN git clone --depth 1 https://github.com/etcd-io/etcd
+COPY wal_fuzzer.go build.sh $SRC/
+WORKDIR $SRC/etcd

projects/etcd/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash -eu
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+mv $SRC/wal_fuzzer.go $SRC/etcd/server/wal/
+compile_go_fuzzer go.etcd.io/etcd/server/v3/wal FuzzWalCreate fuzz_wal_create
+

projects/etcd/project.yaml

@@ -0,0 +1,10 @@
+homepage: "https://etcd.io"
+main_repo: "https://github.com/etcd-io/etcd"
+primary_contact: "ptab@google.com"
+auto_ccs :
+  - "adam@adalogics.com"
+language: go
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address

projects/etcd/wal_fuzzer.go

@@ -0,0 +1,58 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package wal
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+
+	"go.etcd.io/etcd/raft/v3/raftpb"
+	"go.etcd.io/etcd/server/v3/wal/walpb"
+	"go.uber.org/zap"
+)
+
+func FuzzWalCreate(data []byte) int {
+	p, err := ioutil.TempDir("/tmp", "waltest")
+	if err != nil {
+		return -1
+	}
+	defer os.RemoveAll(p)
+	w, err := Create(zap.NewExample(), p, data)
+	if err != nil {
+		return 0
+	}
+	if err = w.SaveSnapshot(walpb.Snapshot{}); err != nil {
+		return 0
+	}
+	if err = w.Save(raftpb.HardState{}, []raftpb.Entry{{Index: 0}}); err != nil {
+		return 0
+	}
+	w.Close()
+	neww, err := Open(zap.NewExample(), p, walpb.Snapshot{})
+	if err != nil {
+		return 0
+	}
+	defer neww.Close()
+	metadata, _, _, err := neww.ReadAll()
+	if err != nil {
+		return 0
+	}
+	if !bytes.Equal(data, metadata) {
+		panic("data and metadata are not equal, but they should be")
+	}
+	return 1
+}