Add fuzzer for cmap parsingchromium/2873

Review-Url: https://codereview.chromium.org/2365143002

2 files changed, 28 insertions, 0 deletions

diff --git a/testing/libfuzzer/BUILD.gn b/testing/libfuzzer/BUILD.gn
index a872901e77..7049add6c5 100644
--- a/testing/libfuzzer/BUILD.gn
+++ b/testing/libfuzzer/BUILD.gn
@@ -154,6 +154,21 @@ if (pdf_enable_xfa) {
   }
 }
 
+source_set("pdf_cmap_fuzzer") {
+  testonly = true
+  sources = [
+    "pdf_cmap_fuzzer.cc",
+  ]
+  deps = [
+    "//third_party/pdfium:pdfium",
+  ]
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    ":libfuzzer_config",
+  ]
+}
+
 source_set("pdf_codec_fax_fuzzer") {
   testonly = true
   sources = [
diff --git a/testing/libfuzzer/pdf_cmap_fuzzer.cc b/testing/libfuzzer/pdf_cmap_fuzzer.cc
new file mode 100644
index 0000000000..652e6b887f
--- /dev/null
+++ b/testing/libfuzzer/pdf_cmap_fuzzer.cc
@@ -0,0 +1,13 @@
+// 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 <cstdint>
+
+#include "core/fpdfapi/fpdf_font/font_int.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  CPDF_CMap cmap;
+  cmap.LoadEmbedded(data, size);
+  return 0;
+}