| 1 | /* |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This source code is licensed under both the BSD-style license (found in the |
| 6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
| 7 | * in the COPYING file in the root directory of this source tree). |
| 8 | * You may select, at your option, one of the above-listed licenses. |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * This fuzz target performs a zstd round-trip test (compress & decompress), |
| 13 | * compares the result with the original, and calls abort() on corruption. |
| 14 | */ |
| 15 | |
| 16 | #include <stddef.h> |
| 17 | #include <stdlib.h> |
| 18 | #include <stdio.h> |
| 19 | #include <string.h> |
| 20 | #include "common/cpu.h" |
| 21 | #include "common/huf.h" |
| 22 | #include "fuzz_helpers.h" |
| 23 | #include "fuzz_data_producer.h" |
| 24 | |
| 25 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) |
| 26 | { |
| 27 | FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); |
| 28 | /* Select random parameters: #streams, X1 or X2 decoding, bmi2 */ |
| 29 | int const streams = FUZZ_dataProducer_int32Range(producer, 0, 1); |
| 30 | int const symbols = FUZZ_dataProducer_int32Range(producer, 0, 1); |
| 31 | int const flags = 0 |
| 32 | | (ZSTD_cpuid_bmi2(ZSTD_cpuid()) && FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_bmi2 : 0) |
| 33 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_optimalDepth : 0) |
| 34 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_preferRepeat : 0) |
| 35 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_suspectUncompressible : 0) |
| 36 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableAsm : 0) |
| 37 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableFast : 0); |
| 38 | /* Select a random cBufSize - it may be too small */ |
| 39 | size_t const dBufSize = FUZZ_dataProducer_uint32Range(producer, 0, 8 * size + 500); |
| 40 | size_t const maxTableLog = FUZZ_dataProducer_uint32Range(producer, 1, HUF_TABLELOG_MAX); |
| 41 | HUF_DTable* dt = (HUF_DTable*)FUZZ_malloc(HUF_DTABLE_SIZE(maxTableLog) * sizeof(HUF_DTable)); |
| 42 | size_t const wkspSize = HUF_WORKSPACE_SIZE; |
| 43 | void* wksp = FUZZ_malloc(wkspSize); |
| 44 | void* dBuf = FUZZ_malloc(dBufSize); |
| 45 | dt[0] = maxTableLog * 0x01000001; |
| 46 | size = FUZZ_dataProducer_remainingBytes(producer); |
| 47 | |
| 48 | if (symbols == 0) { |
| 49 | size_t const err = HUF_readDTableX1_wksp(dt, src, size, wksp, wkspSize, flags); |
| 50 | if (ZSTD_isError(err)) |
| 51 | goto _out; |
| 52 | } else { |
| 53 | size_t const err = HUF_readDTableX2_wksp(dt, src, size, wksp, wkspSize, flags); |
| 54 | if (ZSTD_isError(err)) |
| 55 | goto _out; |
| 56 | } |
| 57 | if (streams == 0) |
| 58 | HUF_decompress1X_usingDTable(dBuf, dBufSize, src, size, dt, flags); |
| 59 | else |
| 60 | HUF_decompress4X_usingDTable(dBuf, dBufSize, src, size, dt, flags); |
| 61 | |
| 62 | _out: |
| 63 | free(dt); |
| 64 | free(wksp); |
| 65 | free(dBuf); |
| 66 | FUZZ_dataProducer_free(producer); |
| 67 | return 0; |
| 68 | } |