Meta: Add a fuzzer for the QOILoader

Meta/Lagom/Fuzzers/CMakeLists.txt

@@ -34,6 +34,7 @@ add_simple_fuzzer(FuzzPBMLoader LagomGfx)
 add_simple_fuzzer(FuzzPGMLoader LagomGfx)
 add_simple_fuzzer(FuzzPPMLoader LagomGfx)
 add_simple_fuzzer(FuzzPDF LagomPDF)
+add_simple_fuzzer(FuzzQOILoader LagomGfx)
 add_simple_fuzzer(FuzzQuotedPrintableParser LagomIMAP)
 add_simple_fuzzer(FuzzHebrewDecoder LagomTextCodec)
 add_simple_fuzzer(FuzzHttpRequest LagomHTTP)

Meta/Lagom/Fuzzers/FuzzQOILoader.cpp

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibGfx/QOILoader.h>
+#include <stddef.h>
+#include <stdint.h>
+
+extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
+{
+    Gfx::QOIImageDecoderPlugin decoder(data, size);
+    (void)decoder.frame(0);
+    return 0;
+}

Userland/Utilities/test-fuzz.cpp

@@ -24,6 +24,7 @@
     T(PGMLoader)             \
     T(PNGLoader)             \
     T(PPMLoader)             \
+    T(QOILoader)             \
     T(RegexECMA262)          \
     T(RegexPosixExtended)    \
     T(Shell)                 \
@@ -87,6 +88,10 @@ ENUMERATE_TARGETS(__ENUMERATE_TARGET)
 #include <Meta/Lagom/Fuzzers/FuzzPPMLoader.cpp>
 #undef LLVMFuzzerTestOneInput
 
+#define LLVMFuzzerTestOneInput TestQOILoader
+#include <Meta/Lagom/Fuzzers/FuzzQOILoader.cpp>
+#undef LLVMFuzzerTestOneInput
+
 #define LLVMFuzzerTestOneInput TestRegexECMA262
 #include <Meta/Lagom/Fuzzers/FuzzRegexECMA262.cpp>
 #undef LLVMFuzzerTestOneInput