Lagom: Add a markdown fuzzer

Meta/Lagom/CMakeLists.txt

@@ -42,6 +42,7 @@ file(GLOB AK_SOURCES "../../AK/*.cpp")
 file(GLOB LIBCORE_SOURCES "../../Libraries/LibCore/*.cpp")
 file(GLOB LIBIPC_SOURCES "../../Libraries/LibIPC/*.cpp")
 file(GLOB LIBLINE_SOURCES "../../Libraries/LibLine/*.cpp")
+file(GLOB LIBMARKDOWN_SOURCES "../../Libraries/LibMarkdown/*.cpp")
 file(GLOB LIBX86_SOURCES "../../Libraries/LibX86/*.cpp")
 file(GLOB LIBJS_SOURCES "../../Libraries/LibJS/*.cpp")
 file(GLOB LIBJS_SUBDIR_SOURCES "../../Libraries/LibJS/*/*.cpp")
@@ -52,7 +53,7 @@ file(GLOB SHELL_SOURCES "../../Shell/*.cpp")
 file(GLOB SHELL_TESTS "../../Shell/Tests/*.sh")
 
 set(LAGOM_CORE_SOURCES ${AK_SOURCES} ${LIBCORE_SOURCES})
-set(LAGOM_MORE_SOURCES ${LIBIPC_SOURCES} ${LIBLINE_SOURCES} ${LIBJS_SOURCES} ${LIBJS_SUBDIR_SOURCES} ${LIBX86_SOURCES} ${LIBCRYPTO_SOURCES} ${LIBCRYPTO_SUBDIR_SOURCES} ${LIBTLS_SOURCES})
+set(LAGOM_MORE_SOURCES ${LIBIPC_SOURCES} ${LIBLINE_SOURCES} ${LIBJS_SOURCES} ${LIBJS_SUBDIR_SOURCES} ${LIBX86_SOURCES} ${LIBCRYPTO_SOURCES} ${LIBCRYPTO_SUBDIR_SOURCES} ${LIBTLS_SOURCES} ${LIBMARKDOWN_SOURCES})
 
 include_directories (../../)
 include_directories (../../Libraries/)

Meta/Lagom/Fuzzers/CMakeLists.txt

@@ -7,3 +7,13 @@ target_link_libraries(FuzzJs
  PUBLIC Lagom
  PRIVATE $<$<C_COMPILER_ID:Clang>:-fsanitize=fuzzer>
  )
+
+add_executable(FuzzMarkdown FuzzMarkdown.cpp)
+target_compile_options(FuzzMarkdown
+ PRIVATE $<$<C_COMPILER_ID:Clang>:-g -O1 -fsanitize=fuzzer>
+ )
+
+target_link_libraries(FuzzMarkdown
+ PUBLIC Lagom
+ PRIVATE $<$<C_COMPILER_ID:Clang>:-fsanitize=fuzzer>
+ )

Meta/Lagom/Fuzzers/FuzzMarkdown.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/OwnPtr.h>
+#include <AK/StringView.h>
+#include <LibMarkdown/Document.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+ auto markdown = AK::StringView(static_cast<const unsigned char*>(data), size);
+ Markdown::Document::parse(markdown);
+ return 0;
+}