69 lines
2.8 KiB
C
69 lines
2.8 KiB
C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/**
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* This fuzz target performs a zstd round-trip test (compress & decompress),
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* compares the result with the original, and calls abort() on corruption.
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "common/cpu.h"
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#include "common/huf.h"
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#include "fuzz_helpers.h"
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#include "fuzz_data_producer.h"
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int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
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{
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FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
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/* Select random parameters: #streams, X1 or X2 decoding, bmi2 */
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int const streams = FUZZ_dataProducer_int32Range(producer, 0, 1);
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int const symbols = FUZZ_dataProducer_int32Range(producer, 0, 1);
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int const flags = 0
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| (ZSTD_cpuid_bmi2(ZSTD_cpuid()) && FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_bmi2 : 0)
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| (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_optimalDepth : 0)
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| (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_preferRepeat : 0)
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| (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_suspectUncompressible : 0)
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| (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableAsm : 0)
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| (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableFast : 0);
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/* Select a random cBufSize - it may be too small */
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size_t const dBufSize = FUZZ_dataProducer_uint32Range(producer, 0, 8 * size + 500);
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size_t const maxTableLog = FUZZ_dataProducer_uint32Range(producer, 1, HUF_TABLELOG_MAX);
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HUF_DTable* dt = (HUF_DTable*)FUZZ_malloc(HUF_DTABLE_SIZE(maxTableLog) * sizeof(HUF_DTable));
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size_t const wkspSize = HUF_WORKSPACE_SIZE;
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void* wksp = FUZZ_malloc(wkspSize);
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void* dBuf = FUZZ_malloc(dBufSize);
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dt[0] = maxTableLog * 0x01000001;
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size = FUZZ_dataProducer_remainingBytes(producer);
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if (symbols == 0) {
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size_t const err = HUF_readDTableX1_wksp(dt, src, size, wksp, wkspSize, flags);
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if (ZSTD_isError(err))
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goto _out;
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} else {
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size_t const err = HUF_readDTableX2_wksp(dt, src, size, wksp, wkspSize, flags);
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if (ZSTD_isError(err))
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goto _out;
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}
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if (streams == 0)
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HUF_decompress1X_usingDTable(dBuf, dBufSize, src, size, dt, flags);
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else
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HUF_decompress4X_usingDTable(dBuf, dBufSize, src, size, dt, flags);
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_out:
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free(dt);
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free(wksp);
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free(dBuf);
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FUZZ_dataProducer_free(producer);
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return 0;
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}
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