59 lines
2 KiB
C
59 lines
2 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 "fuzz_data_producer.h"
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#include "lz4.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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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 = LZ4_compressBound(size);
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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);
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FUZZ_ASSERT(rt);
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/* If compression succeeds it must round trip correctly. */
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{
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int const dstSize = LZ4_compress_default((const char*)data, dst,
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size, dstCapacity);
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if (dstSize > 0) {
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int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size);
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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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}
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if (dstCapacity > 0) {
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/* Compression succeeds and must round trip correctly. */
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int compressedSize = size;
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int const dstSize = LZ4_compress_destSize((const char*)data, dst,
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&compressedSize, dstCapacity);
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FUZZ_ASSERT(dstSize > 0);
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int const rtSize = LZ4_decompress_safe(dst, rt, dstSize, size);
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FUZZ_ASSERT_MSG(rtSize == compressedSize, "Incorrect regenerated size");
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FUZZ_ASSERT_MSG(!memcmp(data, rt, compressedSize), "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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