68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/**
|
|
* This fuzz target attempts to decompress the fuzzed data with the simple
|
|
* decompression function to ensure the decompressor never crashes.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "fuzz_helpers.h"
|
|
#include "lz4.h"
|
|
#define LZ4F_STATIC_LINKING_ONLY
|
|
#include "lz4frame.h"
|
|
#include "lz4_helpers.h"
|
|
|
|
static void decompress(LZ4F_dctx* dctx, void* dst, size_t dstCapacity,
|
|
const void* src, size_t srcSize,
|
|
const void* dict, size_t dictSize,
|
|
const LZ4F_decompressOptions_t* opts)
|
|
{
|
|
LZ4F_resetDecompressionContext(dctx);
|
|
if (dictSize == 0)
|
|
LZ4F_decompress(dctx, dst, &dstCapacity, src, &srcSize, opts);
|
|
else
|
|
LZ4F_decompress_usingDict(dctx, dst, &dstCapacity, src, &srcSize,
|
|
dict, dictSize, opts);
|
|
}
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
|
|
{
|
|
|
|
uint32_t seed = FUZZ_seed(&data, &size);
|
|
size_t const dstCapacity = FUZZ_rand32(&seed, 0, 4 * size);
|
|
size_t const largeDictSize = 64 * 1024;
|
|
size_t const dictSize = FUZZ_rand32(&seed, 0, largeDictSize);
|
|
char* const dst = (char*)malloc(dstCapacity);
|
|
char* const dict = (char*)malloc(dictSize);
|
|
LZ4F_decompressOptions_t opts;
|
|
LZ4F_dctx* dctx;
|
|
LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION);
|
|
|
|
FUZZ_ASSERT(dctx);
|
|
FUZZ_ASSERT(dst);
|
|
FUZZ_ASSERT(dict);
|
|
|
|
/* Prepare the dictionary. The data doesn't matter for decompression. */
|
|
memset(dict, 0, dictSize);
|
|
|
|
|
|
/* Decompress using multiple configurations. */
|
|
memset(&opts, 0, sizeof(opts));
|
|
opts.stableDst = 0;
|
|
decompress(dctx, dst, dstCapacity, data, size, NULL, 0, &opts);
|
|
opts.stableDst = 1;
|
|
decompress(dctx, dst, dstCapacity, data, size, NULL, 0, &opts);
|
|
opts.stableDst = 0;
|
|
decompress(dctx, dst, dstCapacity, data, size, dict, dictSize, &opts);
|
|
opts.stableDst = 1;
|
|
decompress(dctx, dst, dstCapacity, data, size, dict, dictSize, &opts);
|
|
|
|
LZ4F_freeDecompressionContext(dctx);
|
|
free(dst);
|
|
free(dict);
|
|
|
|
return 0;
|
|
}
|