lib/fuzzing/fuzz_regfio.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Windows NT registry I/O library
   4  * Copyright (C) Michael Hanselmann 2019
   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 "system/filesys.h"
  23 #include "lib/util/fault.h"
  24 #include "registry/reg_objects.h"
  25 #include "registry/regfio.h"
  26
  27 static FILE *fp;
  28 static char filename[128];
  29
  30 int LLVMFuzzerInitialize(int *argc, char ***argv)
  31 {
  32         fp = tmpfile();
  33
  34         (void)snprintf(filename, sizeof(filename), "/proc/self/fd/%d", fileno(fp));
  35
  36         return 0;
  37 }
  38
  39 int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
  40 {
  41         REGF_FILE* regfile;
  42         REGF_NK_REC *nk, *subkey;
  43
  44         rewind(fp);
  45         (void)fwrite(buf, len, 1, fp);
  46         (void)fflush(fp);
  47
  48         regfile = regfio_open(filename, O_RDONLY, 0600);
  49         if (!regfile) {
  50                 goto out;
  51         }
  52
  53         regfile->ignore_checksums = true;
  54
  55         nk = regfio_rootkey(regfile);
  56         if (nk != NULL) {
  57                 nk->subkey_index = 0;
  58                 while ((subkey = regfio_fetch_subkey(regfile, nk))) {
  59                 }
  60         }
  61
  62 out:
  63         if (regfile != NULL) {
  64                 regfio_close(regfile);
  65         }
  66
  67         return 0;
  68 }