tiff: add Fuzz function

This change adds a sample Fuzz test function to package tiff, under the gofuzz build tag. The function is based on the tiff/tiff.go code, from github.com/dvyukov/go-fuzz-corpus. Fixes golang/go#30719 Updates golang/go#19109 Change-Id: I78771e9a1bd01651ba6ca421ba41f0c0e95d0c53 Reviewed-on: https://go-review.googlesource.com/c/image/+/167097 Run-TryBot: Dmitry Vyukov <[email protected]> TryBot-Result: Gobot Gobot <[email protected]> Reviewed-by: thepudds <[email protected]> Reviewed-by: Josh Bleecher Snyder <[email protected]> Reviewed-by: Dmitry Vyukov <[email protected]>
golang · Mar 21, 2019 · 3fc05d4 · 3fc05d4
1 parent 0694c2d
commit 3fc05d4
Showing 1 changed file with 29 additions and 0 deletions.
diff --git a/tiff/fuzz.go b/tiff/fuzz.go
@@ -0,0 +1,29 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build gofuzz
+
+package tiff
+
+import "bytes"
+
+func Fuzz(data []byte) int {
+	cfg, err := DecodeConfig(bytes.NewReader(data))
+	if err != nil {
+		return 0
+	}
+	if cfg.Width*cfg.Height > 1e6 {
+		return 0
+	}
+	img, err := Decode(bytes.NewReader(data))
+	if err != nil {
+		return 0
+	}
+	var w bytes.Buffer
+	err = Encode(&w, img, nil)
+	if err != nil {
+		panic(err)
+	}
+	return 1
+}