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Telegram/ThirdParty/lz4/ossfuzz/round_trip_hc_fuzzer.c

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+/**
+ * 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 "fuzz_data_producer.h"
+#include "lz4.h"
+#include "lz4hc.h"
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size);
+    int const level = FUZZ_dataProducer_range32(producer,
+        LZ4HC_CLEVEL_MIN, LZ4HC_CLEVEL_MAX);
+    size = FUZZ_dataProducer_remainingBytes(producer);
+
+    size_t const dstCapacity = LZ4_compressBound(size);
+    char* const dst = (char*)malloc(dstCapacity);
+    char* const rt = (char*)malloc(size);
+
+    FUZZ_ASSERT(dst);
+    FUZZ_ASSERT(rt);
+
+    /* Compression must succeed and round trip correctly. */
+    int const dstSize = LZ4_compress_HC((const char*)data, dst, size,
+                                        dstCapacity, level);
+    FUZZ_ASSERT(dstSize > 0);
+
+    int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size);
+    FUZZ_ASSERT_MSG(rtSize == size, "Incorrect size");
+    FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!");
+
+    free(dst);
+    free(rt);
+    FUZZ_dataProducer_free(producer);
+
+    return 0;
+}