109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
// Copyright 2021 ADA Logics Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package fuzz
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import (
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"context"
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_ "crypto/sha256" // required by go-digest
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"os"
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fuzz "github.com/AdaLogics/go-fuzz-headers"
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"github.com/containerd/containerd/v2/core/diff/apply"
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"github.com/containerd/containerd/v2/core/mount"
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"github.com/containerd/containerd/v2/plugins/content/local"
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"github.com/containerd/containerd/v2/plugins/diff/walking"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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func FuzzDiffApply(data []byte) int {
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f := fuzz.NewConsumer(data)
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mountsQty, err := f.GetInt()
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if err != nil {
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return 0
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}
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mounts := make([]mount.Mount, 0)
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for i := 0; i < mountsQty%30; i++ {
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m := mount.Mount{}
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err = f.GenerateStruct(&m)
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if err != nil {
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return 0
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}
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mounts = append(mounts, m)
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}
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desc := ocispec.Descriptor{}
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err = f.GenerateStruct(&desc)
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if err != nil {
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return 0
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}
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tmpdir, err := os.MkdirTemp("", "fuzzing-")
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if err != nil {
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return 0
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}
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cs, err := local.NewStore(tmpdir)
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if err != nil {
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return 0
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}
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fsa := apply.NewFileSystemApplier(cs)
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_, _ = fsa.Apply(context.Background(), desc, mounts)
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return 1
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}
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func FuzzDiffCompare(data []byte) int {
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f := fuzz.NewConsumer(data)
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lowerQty, err := f.GetInt()
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if err != nil {
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return 0
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}
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lower := make([]mount.Mount, 0)
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for i := 0; i < lowerQty%30; i++ {
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m := mount.Mount{}
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err = f.GenerateStruct(&m)
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if err != nil {
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return 0
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}
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lower = append(lower, m)
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}
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upperQty, err := f.GetInt()
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if err != nil {
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return 0
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}
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upper := make([]mount.Mount, 0)
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for i := 0; i < upperQty%30; i++ {
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m := mount.Mount{}
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err = f.GenerateStruct(&m)
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if err != nil {
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return 0
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}
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upper = append(upper, m)
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}
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ctx := context.Background()
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tmpdir, err := os.MkdirTemp("", "fuzzing-")
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if err != nil {
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return 0
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}
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cs, err := local.NewStore(tmpdir)
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if err != nil {
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return 0
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}
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walker := walking.NewWalkingDiff(cs)
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_, _ = walker.Compare(ctx, lower, upper)
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return 1
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}
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