Add CFX_SAXReader fuzzer

This CL adds a fuzzer for the CFX_SAXReader.

BUG=chromium:587126

Review-Url: https://codereview.chromium.org/2070103002

1 files changed, 37 insertions, 0 deletions

diff --git a/testing/libfuzzer/pdf_cfx_saxreader_fuzzer.cc b/testing/libfuzzer/pdf_cfx_saxreader_fuzzer.cc
new file mode 100644
index 0000000000..54cc410a36
--- /dev/null
+++ b/testing/libfuzzer/pdf_cfx_saxreader_fuzzer.cc
@@ -0,0 +1,37 @@
+// Copyright 2016 The PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <memory>
+
+#include "xfa/fde/xml/cfx_saxreader.h"
+#include "xfa/fgas/crt/fgas_stream.h"
+#include "xfa/fxfa/parser/xfa_utils.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  CFX_WideString input = CFX_WideString::FromUTF8(
+      CFX_ByteStringC(data, static_cast<FX_STRSIZE>(size)));
+  std::unique_ptr<IFX_Stream, ReleaseDeleter<IFX_Stream>> stream(
+      XFA_CreateWideTextRead(input));
+  if (!stream)
+    return 0;
+
+  std::unique_ptr<IFX_FileRead, ReleaseDeleter<IFX_FileRead>> fileRead(
+      FX_CreateFileRead(stream.get(), false));
+  if (!fileRead)
+    return 0;
+
+  CFX_SAXReader reader;
+  if (reader.StartParse(fileRead.get(), 0, -1, CFX_SaxParseMode_NotSkipSpace) <
+      0) {
+    return 0;
+  }
+
+  while (1) {
+    int32_t ret = reader.ContinueParse(nullptr);
+    if (ret < 0 || ret > 99)
+      break;
+  }
+
+  return 0;
+}