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// SPDX-License-Identifier: 0BSD
///////////////////////////////////////////////////////////////////////////////
//
/// \file fuzz_decode_stream.c
/// \brief Fuzz test program for single threaded .xz decoding
//
// Authors: Lasse Collin
// Maksym Vatsyk
//
///////////////////////////////////////////////////////////////////////////////
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include "lzma.h"
#include "fuzz_common.h"
extern int
LLVMFuzzerTestOneInput(const uint8_t *inbuf, size_t inbuf_size)
{
lzma_stream strm = LZMA_STREAM_INIT;
// Initialize a LZMA decoder using the memory usage limit
// defined in fuzz_common.h
//
// Enable support for concatenated .xz files which is used when
// decompressing regular .xz files (instead of data embedded inside
// some other file format). Integrity checks on the uncompressed
// data are ignored to make fuzzing more effective (incorrect check
// values won't prevent the decoder from processing more input).
//
// The flag LZMA_IGNORE_CHECK doesn't disable verification of
// header CRC32 values. Those checks are disabled when liblzma is
// built with the #define FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION.
lzma_ret ret = lzma_stream_decoder(&strm, MEM_LIMIT,
LZMA_CONCATENATED | LZMA_IGNORE_CHECK);
if (ret != LZMA_OK) {
// This should never happen unless the system has
// no free memory or address space to allow the small
// allocations that the initialization requires.
fprintf(stderr, "lzma_stream_decoder() failed (%d)\n", ret);
abort();
}
fuzz_code(&strm, inbuf, inbuf_size);
// Free the allocated memory.
lzma_end(&strm);
return 0;
}
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