1/**
2 * This fuzz target performs a lz4 round-trip test (compress & decompress),
3 * compares the result with the original, and calls abort() on corruption.
4 */
5
6#include <stddef.h>
7#include <stdint.h>
8#include <stdlib.h>
9#include <string.h>
10
11#include "fuzz_helpers.h"
12#include "fuzz_data_producer.h"
13#include "lz4.h"
14#include "lz4hc.h"
15
16int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
17{
18    FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size);
19    int const level = FUZZ_dataProducer_range32(producer,
20        LZ4HC_CLEVEL_MIN, LZ4HC_CLEVEL_MAX);
21    size = FUZZ_dataProducer_remainingBytes(producer);
22
23    size_t const dstCapacity = LZ4_compressBound(size);
24    char* const dst = (char*)malloc(dstCapacity);
25    char* const rt = (char*)malloc(size);
26
27    FUZZ_ASSERT(dst);
28    FUZZ_ASSERT(rt);
29
30    /* Compression must succeed and round trip correctly. */
31    int const dstSize = LZ4_compress_HC((const char*)data, dst, size,
32                                        dstCapacity, level);
33    FUZZ_ASSERT(dstSize > 0);
34
35    int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size);
36    FUZZ_ASSERT_MSG(rtSize == size, "Incorrect size");
37    FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!");
38
39    free(dst);
40    free(rt);
41    FUZZ_dataProducer_free(producer);
42
43    return 0;
44}
45