mirror of
https://github.com/facebook/zstd.git
synced 2025-03-06 16:56:49 +02:00
fcaf06ddb4
* add check for valid dest buffer and fuzz on random dest ptr when malloc 0 * add uptrval to linux-kernel * remove bin files * get rid of uptrval * restrict max pointer value check to platforms where sizeof(size_t) == sizeof(void*)
54 lines
1.5 KiB
C
54 lines
1.5 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 attempts to decompress the fuzzed data with the simple
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* decompression function to ensure the decompressor never crashes.
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*/
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#include "fuzz_data_producer.h"
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#define ZSTD_STATIC_LINKING_ONLY
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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 "fuzz_helpers.h"
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#include "zstd.h"
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static ZSTD_DCtx *dctx = NULL;
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static void* rBuf = NULL;
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static size_t bufSize = 0;
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int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
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{
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size_t const neededBufSize = ZSTD_BLOCKSIZE_MAX;
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FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
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/* Allocate all buffers and contexts if not already allocated */
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if (neededBufSize > bufSize) {
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free(rBuf);
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rBuf = FUZZ_malloc_rand(neededBufSize, producer);
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bufSize = neededBufSize;
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}
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if (!dctx) {
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dctx = ZSTD_createDCtx();
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FUZZ_ASSERT(dctx);
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}
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ZSTD_decompressBegin(dctx);
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ZSTD_decompressBlock(dctx, rBuf, neededBufSize, src, size);
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FUZZ_dataProducer_free(producer);
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#ifndef STATEFUL_FUZZING
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ZSTD_freeDCtx(dctx); dctx = NULL;
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#endif
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return 0;
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}
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