Copy fuzzers from github.com/cncf/cncf-fuzzing

This commit copies the fuzzers from the repository except for
containerd_import_structured_fuzzer.go.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

contrib/apparmor/apparmor_fuzzer.go

@@ -0,0 +1,37 @@
+//go:build gofuzz
+// +build gofuzz
+
+// Copyright 2022 ADA Logics Ltd
+//
+// 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 apparmor
+
+import (
+	"os"
+)
+
+func FuzzLoadDefaultProfile(data []byte) int {
+	f, err := os.Create("fuzz_file")
+	if err != nil {
+		return 0
+	}
+	defer os.Remove("fuzz_file")
+	_, err = f.Write(data)
+	if err != nil {
+		return 0
+	}
+	_ = LoadDefaultProfile("fuzz_file")
+	return 1
+}