1 files changed, 43 insertions, 0 deletions
diff --git a/ossfuzz/round_trip_frame_fuzzer.c b/ossfuzz/round_trip_frame_fuzzer.c
new file mode 100644
index 0000000..149542d
--- /dev/null
+++ b/ossfuzz/round_trip_frame_fuzzer.c
@@ -0,0 +1,43 @@
+/**
+ * This fuzz target performs a lz4 round-trip test (compress & decompress),
+ * compares the result with the original, and calls abort() on corruption.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "fuzz_helpers.h"
+#include "lz4.h"
+#include "lz4frame.h"
+#include "lz4_helpers.h"
+#include "fuzz_data_producer.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    FUZZ_dataProducer_t* producer = FUZZ_dataProducer_create(data, size);
+    LZ4F_preferences_t const prefs = FUZZ_dataProducer_preferences(producer);
+    size = FUZZ_dataProducer_remainingBytes(producer);
+
+    size_t const dstCapacity = LZ4F_compressFrameBound(LZ4_compressBound(size), &prefs);
+    char* const dst = (char*)malloc(dstCapacity);
+    char* const rt = (char*)malloc(FUZZ_dataProducer_remainingBytes(producer));
+
+    FUZZ_ASSERT(dst);
+    FUZZ_ASSERT(rt);
+
+    /* Compression must succeed and round trip correctly. */
+    size_t const dstSize =
+            LZ4F_compressFrame(dst, dstCapacity, data, size, &prefs);
+    FUZZ_ASSERT(!LZ4F_isError(dstSize));
+    size_t const rtSize = FUZZ_decompressFrame(rt, size, dst, dstSize);
+    FUZZ_ASSERT_MSG(rtSize == size, "Incorrect regenerated size");
+    FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!");
+
+    free(dst);
+    free(rt);
+    FUZZ_dataProducer_free(producer);
+
+    return 0;
+}