Meta: Add Brotli fuzzer

Meta/Lagom/Fuzzers/CMakeLists.txt

@@ -19,6 +19,7 @@ function(add_simple_fuzzer name)
 endfunction()
 
 add_simple_fuzzer(FuzzBMPLoader LagomGfx)
+add_simple_fuzzer(FuzzBrotli LagomCompress)
 add_simple_fuzzer(FuzzCyrillicDecoder LagomTextCodec)
 add_simple_fuzzer(FuzzDeflateCompression LagomCompress)
 add_simple_fuzzer(FuzzDeflateDecompression LagomCompress)

Meta/Lagom/Fuzzers/FuzzBrotli.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCompress/Brotli.h>
+#include <LibCore/MemoryStream.h>
+#include <stdio.h>
+
+extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
+{
+    auto bufstream_result = Core::Stream::MemoryStream::construct({ const_cast<uint8_t*>(data), size });
+    if (bufstream_result.is_error()) {
+        dbgln("MemoryStream::construct() failed.");
+        return 1;
+    }
+    auto bufstream = bufstream_result.release_value();
+
+    auto brotli_stream = Compress::BrotliDecompressionStream { *bufstream };
+
+    auto uncompressed = brotli_stream.read_all();
+    return uncompressed.is_error();
+}