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 "lz4.h"
13 #include "fuzz_data_producer.h"
14
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)15 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
16 {
17 FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size);
18 size_t const partialCapacitySeed = FUZZ_dataProducer_retrieve32(producer);
19 size = FUZZ_dataProducer_remainingBytes(producer);
20
21 size_t const partialCapacity = FUZZ_getRange_from_uint32(partialCapacitySeed, 0, size);
22 size_t const dstCapacity = LZ4_compressBound(size);
23
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_default((const char*)data, dst,
32 size, dstCapacity);
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 /* Partial decompression must succeed. */
40 {
41 char* const partial = (char*)malloc(partialCapacity);
42 FUZZ_ASSERT(partial);
43 int const partialSize = LZ4_decompress_safe_partial(
44 dst, partial, dstSize, partialCapacity, partialCapacity);
45 FUZZ_ASSERT(partialSize >= 0);
46 FUZZ_ASSERT_MSG(partialSize == partialCapacity, "Incorrect size");
47 FUZZ_ASSERT_MSG(!memcmp(data, partial, partialSize), "Corruption!");
48 free(partial);
49 }
50
51
52 free(dst);
53 free(rt);
54 FUZZ_dataProducer_free(producer);
55
56 return 0;
57 }
58
