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fuzz: move fuzz_targets from oss-fuzz (#406)
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- Moves fuzz_targets from oss-fuzz. This makes it easy
  to maintain the fuzzers and minimizes breakages that
  can arise as source code changes over time.

- Adds cifuzz action workflow which is a service provided
  by oss-fuzz where this project already runs, this helps
  in catching shallow bugs,regression or build breakage by
  running fuzzers on PR for ~5 minutes.
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manunio authored May 6, 2024
1 parent 77ce858 commit 3203540
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26 changes: 26 additions & 0 deletions .github/workflows/cifuzz.yml
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name: CIFuzz
on: [pull_request]
jobs:
Fuzzing:
runs-on: ubuntu-latest
steps:
- name: Build Fuzzers
id: build
uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
with:
oss-fuzz-project-name: 'burntsushi-toml'
dry-run: false
language: go
- name: Run Fuzzers
uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
with:
oss-fuzz-project-name: 'burntsushi-toml'
fuzz-seconds: 300
dry-run: false
language: go
- name: Upload Crash
uses: actions/upload-artifact@v4
if: failure() && steps.build.outcome == 'success'
with:
name: artifacts
path: ./out/artifacts
34 changes: 34 additions & 0 deletions ossfuzz/fuzz.go
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package ossfuzz

import (
"bytes"
"fmt"

"github.com/BurntSushi/toml"
)

func FuzzToml(data []byte) int {
if len(data) >= 2048 {
return 0
}

var v any
_, err := toml.Decode(string(data), &v)
if err != nil {
return 0
}

buf := new(bytes.Buffer)
err = toml.NewEncoder(buf).Encode(v)
if err != nil {
panic(fmt.Sprintf("failed to encode decoded document: %s", err))
}

var v2 any
_, err = toml.Decode(buf.String(), &v2)
if err != nil {
panic(fmt.Sprintf("failed round trip: %s", err))
}

return 1
}

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