lib/fuzzing/fuzz_lzxpress_huffman_round_trip.c

   1 /*
   2    Fuzzing for lzxpress_huffman{_decompress,_compress} round trip
   3    Copyright (C) Michael Hanselmann 2019
   4    Copyright (C) Douglas Bagnall 2022 <dbagnall@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "fuzzing/fuzzing.h"
  22 #include "compression/lzxpress_huffman.h"
  23
  24
  25 int LLVMFuzzerInitialize(int *argc, char ***argv)
  26 {
  27         return 0;
  28 }
  29
  30
  31 int LLVMFuzzerTestOneInput(uint8_t *buf, size_t len)
  32 {
  33         /*
  34          * we allow compressed to be 25% bigger than decompressed.
  35          */
  36         static uint8_t compressed[1024 * (1024 + 256)];
  37         static uint8_t decompressed[1024 * 1024];
  38         ssize_t compressed_size;
  39         ssize_t decompressed_size;
  40         struct lzxhuff_compressor_mem cmp;
  41
  42         if (len > sizeof(decompressed) || len == 0) {
  43                 return 0;
  44         }
  45
  46         compressed_size = lzxpress_huffman_compress(&cmp,
  47                                                     buf,
  48                                                     len,
  49                                                     compressed,
  50                                                     sizeof(compressed));
  51         if (compressed_size < 0) {
  52                 abort();
  53         }
  54
  55         decompressed_size = lzxpress_huffman_decompress(compressed,
  56                                                         compressed_size,
  57                                                         decompressed,
  58                                                         len);
  59
  60         if (decompressed_size != len) {
  61                 abort();
  62         }
  63         if (memcmp(buf, decompressed, len) != 0) {
  64                 abort();
  65         }
  66
  67         return 0;
  68 }