4 files changed, 82 insertions, 0 deletions
diff --git a/testing/DEPS b/testing/DEPS
index 86d3090407..ce8bbe45f7 100644
--- a/testing/DEPS
+++ b/testing/DEPS
@@ -1,5 +1,6 @@
 include_rules = [
   '+core/include',
+  '+core/fxcodec',
   '+fpdfsdk/include',
   '+public',
   '+v8',
diff --git a/testing/libfuzzer/BUILD.gn b/testing/libfuzzer/BUILD.gn
index d5ccb7f40f..0fb43f2790 100644
--- a/testing/libfuzzer/BUILD.gn
+++ b/testing/libfuzzer/BUILD.gn
@@ -47,4 +47,18 @@ if (pdf_enable_xfa) {
       ":libfuzzer_config",
     ]
   }
+  source_set("pdf_jpx_fuzzer") {
+    testonly = true
+    sources = [
+      "pdf_jpx_fuzzer.cc",
+    ]
+    deps = [
+      "//third_party/pdfium:pdfium",
+    ]
+    configs -= [ "//build/config/compiler:chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      ":libfuzzer_config",
+    ]
+  }
 }
diff --git a/testing/libfuzzer/fuzzers.gyp b/testing/libfuzzer/fuzzers.gyp
index bdd9086592..1f04baa77f 100644
--- a/testing/libfuzzer/fuzzers.gyp
+++ b/testing/libfuzzer/fuzzers.gyp
@@ -61,6 +61,21 @@
         },
       ],
     }],
+    ['OS=="linux"', {
+      'targets': [
+        {
+          'target_name': 'pdf_jpx_fuzzer',
+          'type': 'executable',
+          'dependencies': [
+            '../../pdfium.gyp:pdfium',
+          ],
+          'sources': [
+            'pdf_jpx_fuzzer.cc',
+            'unittest_main.cc',
+          ],
+        },
+      ],
+    }],
   ],
   # Empty target so that nonxfa builds work.
   'targets': [
diff --git a/testing/libfuzzer/pdf_jpx_fuzzer.cc b/testing/libfuzzer/pdf_jpx_fuzzer.cc
new file mode 100644
index 0000000000..8e16f24abc
--- /dev/null
+++ b/testing/libfuzzer/pdf_jpx_fuzzer.cc
@@ -0,0 +1,52 @@
+// 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 <memory>
+#include <vector>
+
+#include "core/fxcodec/codec/codec_int.h"
+#include "core/include/fxge/fx_dib.h"
+
+CCodec_JpxModule g_module;
+
+struct DecoderDeleter {
+  void operator()(CJPX_Decoder* decoder) { g_module.DestroyDecoder(decoder); }
+};
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  std::unique_ptr<CJPX_Decoder, DecoderDeleter> decoder(
+      g_module.CreateDecoder(data, size, nullptr));
+  if (!decoder)
+    return 0;
+
+  FX_DWORD width;
+  FX_DWORD height;
+  FX_DWORD components;
+  g_module.GetImageInfo(decoder.get(), &width, &height, &components);
+
+  FXDIB_Format format;
+  if (components == 1) {
+    format = FXDIB_8bppRgb;
+  } else if (components <= 3) {
+    format = FXDIB_Rgb;
+  } else if (components == 4) {
+    format = FXDIB_Rgb32;
+  } else {
+    width = (width * components + 2) / 3;
+    format = FXDIB_Rgb;
+  }
+
+  std::unique_ptr<CFX_DIBitmap> bitmap(new CFX_DIBitmap);
+  if (!bitmap->Create(width, height, format))
+    return 0;
+
+  std::vector<uint8_t> output_offsets(components);
+  for (FX_DWORD i = 0; i < components; ++i)
+    output_offsets[i] = i;
+
+  g_module.Decode(decoder.get(), bitmap->GetBuffer(), bitmap->GetPitch(),
+                  output_offsets);
+  return 0;
+}