49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/**
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* This fuzz target attempts to compress the fuzzed data with the simple
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* compression function with an output buffer that may be too small to
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* ensure that the compressor never crashes.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fuzz_helpers.h"
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#include "lz4.h"
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#include "lz4frame.h"
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#include "lz4_helpers.h"
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#include "fuzz_data_producer.h"
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(data, size);
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LZ4F_preferences_t const prefs = FUZZ_dataProducer_preferences(producer);
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size_t const dstCapacitySeed = FUZZ_dataProducer_retrieve32(producer);
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size = FUZZ_dataProducer_remainingBytes(producer);
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size_t const compressBound = LZ4F_compressFrameBound(size, &prefs);
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size_t const dstCapacity = FUZZ_getRange_from_uint32(dstCapacitySeed, 0, compressBound);
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char* const dst = (char*)malloc(dstCapacity);
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char* const rt = (char*)malloc(size);
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FUZZ_ASSERT(dst!=NULL);
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FUZZ_ASSERT(rt!=NULL);
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/* If compression succeeds it must round trip correctly. */
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size_t const dstSize =
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LZ4F_compressFrame(dst, dstCapacity, data, size, &prefs);
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if (!LZ4F_isError(dstSize)) {
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size_t const rtSize = FUZZ_decompressFrame(rt, size, dst, dstSize);
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FUZZ_ASSERT_MSG(rtSize == size, "Incorrect regenerated size");
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FUZZ_ASSERT_MSG(!memcmp(data, rt, size), "Corruption!");
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}
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free(dst);
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free(rt);
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FUZZ_dataProducer_free(producer);
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return 0;
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}
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