1 /**
2 * This fuzz target attempts to compress the fuzzed data with the simple
3 * compression function with an output buffer that may be too small to
4 * ensure that the compressor never crashes.
5 */
6
7 #include <stddef.h>
8 #include <stdint.h>
9 #include <stdlib.h>
10 #include <string.h>
11
12 #include "fuzz_helpers.h"
13 #include "lz4.h"
14 #include "lz4frame.h"
15 #include "lz4_helpers.h"
16 #include "fuzz_data_producer.h"
17
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)18 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
19 {
20 FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size);
21 LZ4F_preferences_t const prefs = FUZZ_dataProducer_preferences(producer);
22 size_t const dstCapacitySeed = FUZZ_dataProducer_retrieve32(producer);
23 size = FUZZ_dataProducer_remainingBytes(producer);
24
25 size_t const compressBound = LZ4F_compressFrameBound(size, &prefs);
26 size_t const dstCapacity = FUZZ_getRange_from_uint32(dstCapacitySeed, 0, compressBound);
27
28 char* const dst = (char*)malloc(dstCapacity);
29 char* const rt = (char*)malloc(size);
30
31 FUZZ_ASSERT(dst!=NULL);
32 FUZZ_ASSERT(rt!=NULL);
33
34 /* If compression succeeds it must round trip correctly. */
35 size_t const dstSize =
36 LZ4F_compressFrame(dst, dstCapacity, data, size, &prefs);
37 if (!LZ4F_isError(dstSize)) {
38 size_t const rtSize = FUZZ_decompressFrame(rt, size, dst, dstSize);
39 FUZZ_ASSERT_MSG(rtSize == size, "Incorrect regenerated size");
40 FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!");
41 }
42
43 free(dst);
44 free(rt);
45 FUZZ_dataProducer_free(producer);
46
47 return 0;
48 }
49
