metainfo: Add fuzzing func

diff --git a/metainfo/fuzz.go b/metainfo/fuzz.go
new file mode 100644 (file)
index 0000000..60ece52
--- /dev/null
+++ b/metainfo/fuzz.go
@@ -0,0 +1,28 @@
+// +build gofuzz
+
+package metainfo
+
+import (
+       "github.com/anacrolix/torrent/bencode"
+)
+
+func Fuzz(b []byte) int {
+       var mi MetaInfo
+       err := bencode.Unmarshal(b, &mi)
+       if err != nil {
+               return 0
+       }
+       _, err = bencode.Marshal(mi)
+       if err != nil {
+               panic(err)
+       }
+       info, err := mi.UnmarshalInfo()
+       if err != nil {
+               return 0
+       }
+       _, err = bencode.Marshal(info)
+       if err != nil {
+               panic(err)
+       }
+       return 1
+}