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-rw-r--r--tests/ossfuzz/fuzz.c82
1 files changed, 0 insertions, 82 deletions
diff --git a/tests/ossfuzz/fuzz.c b/tests/ossfuzz/fuzz.c
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--- a/tests/ossfuzz/fuzz.c
+++ /dev/null
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-///////////////////////////////////////////////////////////////////////////////
-//
-/// \file fuzz.c
-/// \brief Fuzz test program for liblzma
-//
-// Author: Lasse Collin
-//
-// This file has been put into the public domain.
-// You can do whatever you want with this file.
-//
-///////////////////////////////////////////////////////////////////////////////
-
-#include <inttypes.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include "lzma.h"
-
-
-// Output buffer for decompressed data. This is write only; nothing cares
-// about the actual data written here.
-static uint8_t outbuf[4096];
-
-
-extern int
-LLVMFuzzerTestOneInput(const uint8_t *inbuf, size_t inbuf_size)
-{
- // Some header values can make liblzma allocate a lot of RAM
- // (up to about 4 GiB with liblzma 5.2.x). We set a limit here to
- // prevent extreme allocations when fuzzing.
- const uint64_t memlimit = 300 << 20; // 300 MiB
-
- // Initialize a .xz decoder using the above memory usage limit.
- // 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_stream strm = LZMA_STREAM_INIT;
- lzma_ret ret = lzma_stream_decoder(&strm, memlimit,
- 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();
- }
-
- // Give the whole input buffer at once to liblzma.
- // Output buffer isn't initialized as liblzma only writes to it.
- strm.next_in = inbuf;
- strm.avail_in = inbuf_size;
- strm.next_out = outbuf;
- strm.avail_out = sizeof(outbuf);
-
- while ((ret = lzma_code(&strm, LZMA_FINISH)) == LZMA_OK) {
- if (strm.avail_out == 0) {
- // outbuf became full. We don't care about the
- // uncompressed data there, so we simply reuse
- // the outbuf and overwrite the old data.
- strm.next_out = outbuf;
- strm.avail_out = sizeof(outbuf);
- }
- }
-
- // LZMA_PROG_ERROR should never happen as long as the code calling
- // the liblzma functions is correct. Thus LZMA_PROG_ERROR is a sign
- // of a bug in either this function or in liblzma.
- if (ret == LZMA_PROG_ERROR) {
- fprintf(stderr, "lzma_code() returned LZMA_PROG_ERROR\n");
- abort();
- }
-
- // Free the allocated memory.
- lzma_end(&strm);
-
- return 0;
-}