From d775dea13cf414f7ad8f7c2c22ace68445ae4adb Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Fri, 13 Nov 2020 15:40:56 -0500
Subject: [PATCH] Lagom: Add a gemini fuzzer

Didn't find anything interesting, but might as well check it in.
---
 Meta/Lagom/Fuzzers/CMakeLists.txt |  9 ++++++++
 Meta/Lagom/Fuzzers/FuzzGemini.cpp | 38 +++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 Meta/Lagom/Fuzzers/FuzzGemini.cpp

diff --git a/Meta/Lagom/Fuzzers/CMakeLists.txt b/Meta/Lagom/Fuzzers/CMakeLists.txt
index a974296c6f..4879f5ef97 100644
--- a/Meta/Lagom/Fuzzers/CMakeLists.txt
+++ b/Meta/Lagom/Fuzzers/CMakeLists.txt
@@ -16,6 +16,15 @@ target_link_libraries(FuzzELF
     PRIVATE $<$<C_COMPILER_ID:Clang>:-fsanitize=fuzzer>
     )
 
+add_executable(FuzzGemini FuzzGemini.cpp)
+target_compile_options(FuzzGemini
+    PRIVATE $<$<C_COMPILER_ID:Clang>:-g -O1 -fsanitize=fuzzer>
+    )
+target_link_libraries(FuzzGemini
+    PUBLIC Lagom
+    PRIVATE $<$<C_COMPILER_ID:Clang>:-fsanitize=fuzzer>
+    )
+
 add_executable(FuzzJs FuzzJs.cpp)
 target_compile_options(FuzzJs
     PRIVATE $<$<C_COMPILER_ID:Clang>:-g -O1 -fsanitize=fuzzer>
diff --git a/Meta/Lagom/Fuzzers/FuzzGemini.cpp b/Meta/Lagom/Fuzzers/FuzzGemini.cpp
new file mode 100644
index 0000000000..0d0a4b29e8
--- /dev/null
+++ b/Meta/Lagom/Fuzzers/FuzzGemini.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/StringView.h>
+#include <AK/URL.h>
+#include <LibGemini/Document.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+    auto gemini = AK::StringView(static_cast<const unsigned char*>(data), size);
+    Gemini::Document::parse(gemini, {});
+    return 0;
+}