| /** |
| * 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 "fuzz_data_producer.h" |
| #include "lz4.h" |
| |
| int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) |
| { |
| FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size); |
| size_t const dstCapacitySeed = FUZZ_dataProducer_retrieve32(producer); |
| size = FUZZ_dataProducer_remainingBytes(producer); |
| |
| size_t const compressBound = LZ4_compressBound(size); |
| size_t const dstCapacity = FUZZ_getRange_from_uint32(dstCapacitySeed, 0, compressBound); |
| |
| char* const dst = (char*)malloc(dstCapacity); |
| char* const rt = (char*)malloc(size); |
| |
| FUZZ_ASSERT(dst); |
| FUZZ_ASSERT(rt); |
| |
| /* If compression succeeds it must round trip correctly. */ |
| { |
| int const dstSize = LZ4_compress_default((const char*)data, dst, |
| size, dstCapacity); |
| 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. */ |
| int compressedSize = size; |
| int const dstSize = LZ4_compress_destSize((const char*)data, dst, |
| &compressedSize, dstCapacity); |
| 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(dst); |
| free(rt); |
| FUZZ_dataProducer_free(producer); |
| |
| return 0; |
| } |