From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- src/zstd/tests/fuzz/dictionary_decompress.c | 73 +++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 src/zstd/tests/fuzz/dictionary_decompress.c (limited to 'src/zstd/tests/fuzz/dictionary_decompress.c') diff --git a/src/zstd/tests/fuzz/dictionary_decompress.c b/src/zstd/tests/fuzz/dictionary_decompress.c new file mode 100644 index 000000000..9944baa15 --- /dev/null +++ b/src/zstd/tests/fuzz/dictionary_decompress.c @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2016-2020, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + * You may select, at your option, one of the above-listed licenses. + */ + +/** + * This fuzz target attempts to decompress the fuzzed data with the dictionary + * decompression function to ensure the decompressor never crashes. It does not + * fuzz the dictionary. + */ + +#include +#include +#include +#include "fuzz_helpers.h" +#include "zstd_helpers.h" +#include "fuzz_data_producer.h" + +static ZSTD_DCtx *dctx = NULL; + +int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) +{ + /* Give a random portion of src data to the producer, to use for + parameter generation. The rest will be used for (de)compression */ + FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); + size = FUZZ_dataProducer_reserveDataPrefix(producer); + + FUZZ_dict_t dict; + ZSTD_DDict* ddict = NULL; + + if (!dctx) { + dctx = ZSTD_createDCtx(); + FUZZ_ASSERT(dctx); + } + dict = FUZZ_train(src, size, producer); + if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) { + ddict = ZSTD_createDDict(dict.buff, dict.size); + FUZZ_ASSERT(ddict); + } else { + if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) + FUZZ_ZASSERT(ZSTD_DCtx_loadDictionary_advanced( + dctx, dict.buff, dict.size, + (ZSTD_dictLoadMethod_e)FUZZ_dataProducer_uint32Range(producer, 0, 1), + (ZSTD_dictContentType_e)FUZZ_dataProducer_uint32Range(producer, 0, 2))); + else + FUZZ_ZASSERT(ZSTD_DCtx_refPrefix_advanced( + dctx, dict.buff, dict.size, + (ZSTD_dictContentType_e)FUZZ_dataProducer_uint32Range(producer, 0, 2))); + } + + { + size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size); + void* rBuf = FUZZ_malloc(bufSize); + if (ddict) { + ZSTD_decompress_usingDDict(dctx, rBuf, bufSize, src, size, ddict); + } else { + ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size); + } + free(rBuf); + } + free(dict.buff); + FUZZ_dataProducer_free(producer); + ZSTD_freeDDict(ddict); +#ifndef STATEFUL_FUZZING + ZSTD_freeDCtx(dctx); dctx = NULL; +#endif + return 0; +} -- cgit v1.2.3