Copy FuzzConvertManifest from cncf/cncf-fuzzing

This test is one of the noisiest and should be moved from
cncf/cncf-fuzzing first.

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

integration/client/go.mod

@@ -20,6 +20,7 @@ require (
 )
 
 require (
+	github.com/AdaLogics/go-fuzz-headers v0.0.0-20210715213245-6c3934b029d8 // indirect
 	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/blang/semver v3.5.1+incompatible // indirect
 	github.com/cilium/ebpf v0.7.0 // indirect

integration/client/go.sum

@@ -38,6 +38,7 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/AdaLogics/go-fuzz-headers v0.0.0-20210715213245-6c3934b029d8 h1:V8krnnfGj4pV65YLUm3C0/8bl7V5Nry2Pwvy3ru/wLc=
 github.com/AdaLogics/go-fuzz-headers v0.0.0-20210715213245-6c3934b029d8/go.mod h1:CzsSbkDixRphAF5hS6wbMKq0eI6ccJRb7/A0M6JBnwg=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=

remotes/docker/converter_fuzz.go

@@ -0,0 +1,56 @@
+//go:build gofuzz
+// +build gofuzz
+
+/*
+   Copyright The containerd Authors.
+
+   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 docker
+
+import (
+	"context"
+	"os"
+
+	fuzz "github.com/AdaLogics/go-fuzz-headers"
+	"github.com/containerd/containerd/content/local"
+	"github.com/containerd/containerd/log"
+	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/sirupsen/logrus"
+)
+
+func FuzzConvertManifest(data []byte) int {
+	ctx := context.Background()
+
+	// Do not log the message below
+	// level=warning msg="do nothing for media type: ..."
+	log.G(ctx).Logger.SetLevel(logrus.PanicLevel)
+
+	f := fuzz.NewConsumer(data)
+	desc := ocispec.Descriptor{}
+	err := f.GenerateStruct(&desc)
+	if err != nil {
+		return 0
+	}
+	tmpdir, err := os.MkdirTemp("", "fuzzing-")
+	if err != nil {
+		return 0
+	}
+	cs, err := local.NewStore(tmpdir)
+	if err != nil {
+		return 0
+	}
+	_, _ = ConvertManifest(ctx, cs, desc)
+	return 1
+}