From b5c6cd48c0f6b5c50e088096f8decdf2b673fb49 Mon Sep 17 00:00:00 2001
From: AdamKorcz <44787359+AdamKorcz@users.noreply.github.com>
Date: Sat, 3 Sep 2022 11:20:15 +0100
Subject: [PATCH] golang: add fuzzer (#8402)

Signed-off-by: AdamKorcz <adam@adalogics.com>

Signed-off-by: AdamKorcz <adam@adalogics.com>
---
 projects/golang/Dockerfile     |  3 ++-
 projects/golang/build.sh       |  5 +++++
 projects/golang/webp_fuzzer.go | 25 +++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 projects/golang/webp_fuzzer.go

diff --git a/projects/golang/Dockerfile b/projects/golang/Dockerfile
index f7c31aa83..0f0db2243 100644
--- a/projects/golang/Dockerfile
+++ b/projects/golang/Dockerfile
@@ -36,6 +36,7 @@ COPY build.sh text_fuzzer.go \
      elf_fuzzer.go \
      tiff_fuzzer.go \
      fuzz_tiff_decode.options \
-     openpgp_fuzzer.go $SRC/
+     openpgp_fuzzer.go \
+     webp_fuzzer.go $SRC/
 
 WORKDIR $SRC/golang
diff --git a/projects/golang/build.sh b/projects/golang/build.sh
index a1652e61a..34c7d1260 100755
--- a/projects/golang/build.sh
+++ b/projects/golang/build.sh
@@ -107,6 +107,11 @@ cd $SRC/instrumentation && go run main.go $SRC/crypto && cd -
 go mod tidy
 compile_go_fuzzer . FuzzOpenpgpRead fuzz_openpgp_read
 
+cd $SRC/image/webp
+cp $SRC/webp_fuzzer.go ./
+compile_go_fuzzer . FuzzWebpDecode fuzz_webp_decode
+zip $OUT/fuzz_webp_decode_seed_corpus.zip $SRC/image/testdata/*.webp
+
 cd $SRC/image/tiff
 cp $SRC/tiff_fuzzer.go ./
 compile_go_fuzzer . FuzzTiffDecode fuzz_tiff_decode
diff --git a/projects/golang/webp_fuzzer.go b/projects/golang/webp_fuzzer.go
new file mode 100644
index 000000000..f1bc245b1
--- /dev/null
+++ b/projects/golang/webp_fuzzer.go
@@ -0,0 +1,25 @@
+// Copyright 2022 Google LLC
+//
+// 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 webp
+
+import (
+	"bytes"
+)
+
+func FuzzWebpDecode(data []byte) int {
+	_, _ = Decode(bytes.NewReader(data))
+	return 1
+}