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samba-mirror/lib/fuzzing/fuzz_lzxpress_huffman_round_trip.c
Douglas Bagnall 5c81f34935 lib/fuzzing: LLVMFuzzerTestOneInput() takes const uint8_t*
We have been using `uint8_t *`, which works fine as far as
linking goes, but leads fuzz target developers to sometimes
forget why they can't just modify the passed in string instead of
copying it for modification (e.g. to NUL-terminate).

REF: https://llvm.org/docs/LibFuzzer.html#fuzz-target

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-08-08 04:39:38 +00:00

69 lines
1.7 KiB
C

/*
Fuzzing for lzxpress_huffman{_decompress,_compress} round trip
Copyright (C) Michael Hanselmann 2019
Copyright (C) Douglas Bagnall 2022 <dbagnall@samba.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "fuzzing/fuzzing.h"
#include "compression/lzxpress_huffman.h"
int LLVMFuzzerInitialize(int *argc, char ***argv)
{
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
{
/*
* we allow compressed to be 25% bigger than decompressed.
*/
static uint8_t compressed[1024 * (1024 + 256)];
static uint8_t decompressed[1024 * 1024];
ssize_t compressed_size;
ssize_t decompressed_size;
struct lzxhuff_compressor_mem cmp;
if (len > sizeof(decompressed) || len == 0) {
return 0;
}
compressed_size = lzxpress_huffman_compress(&cmp,
buf,
len,
compressed,
sizeof(compressed));
if (compressed_size < 0) {
abort();
}
decompressed_size = lzxpress_huffman_decompress(compressed,
compressed_size,
decompressed,
len);
if (decompressed_size != len) {
abort();
}
if (memcmp(buf, decompressed, len) != 0) {
abort();
}
return 0;
}