| /** |
| * This fuzz target attempts to compress the fuzzed data with the simple |
| * compression function with an output buffer that may be too small to |
| * ensure that the compressor never crashes. |
| */ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "fuzz_helpers.h" |
| #include "lz4.h" |
| #include "lz4hc.h" |
| |
| int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) |
| { |
| uint32_t seed = FUZZ_seed(&data, &size); |
| size_t const dstCapacity = FUZZ_rand32(&seed, 0, LZ4_compressBound(size)); |
| char* const dst = (char*)malloc(dstCapacity); |
| char* const rt = (char*)malloc(size); |
| int const level = FUZZ_rand32(&seed, LZ4HC_CLEVEL_MIN, LZ4HC_CLEVEL_MAX); |
| |
| FUZZ_ASSERT(dst); |
| FUZZ_ASSERT(rt); |
| |
| /* If compression succeeds it must round trip correctly. */ |
| { |
| int const dstSize = LZ4_compress_HC((const char*)data, dst, size, |
| dstCapacity, level); |
| if (dstSize > 0) { |
| int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size); |
| FUZZ_ASSERT_MSG(rtSize == size, "Incorrect regenerated size"); |
| FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!"); |
| } |
| } |
| |
| if (dstCapacity > 0) { |
| /* Compression succeeds and must round trip correctly. */ |
| void* state = malloc(LZ4_sizeofStateHC()); |
| FUZZ_ASSERT(state); |
| int compressedSize = size; |
| int const dstSize = LZ4_compress_HC_destSize(state, (const char*)data, |
| dst, &compressedSize, |
| dstCapacity, level); |
| FUZZ_ASSERT(dstSize > 0); |
| int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size); |
| FUZZ_ASSERT_MSG(rtSize == compressedSize, "Incorrect regenerated size"); |
| FUZZ_ASSERT_MSG(!memcmp(data, rt, compressedSize), "Corruption!"); |
| free(state); |
| } |
| |
| free(dst); |
| free(rt); |
| |
| return 0; |
| } |