fuzzers/config_file_fuzzer.c

   1 /*
   2  * libgit2 config file parser fuzz target.
   3  *
   4  * Copyright (C) the libgit2 contributors. All rights reserved.
   5  *
   6  * This file is part of libgit2, distributed under the GNU GPL v2 with
   7  * a Linking Exception. For full terms see the included COPYING file.
   8  */
   9
  10 #include "git2.h"
  11 #include "config_backend.h"
  12
  13 #define UNUSED(x) (void)(x)
  14
  15 int foreach_cb(const git_config_entry *entry, void *payload)
  16 {
  17         UNUSED(entry);
  18         UNUSED(payload);
  19
  20         return 0;
  21 }
  22
  23 int LLVMFuzzerInitialize(int *argc, char ***argv)
  24 {
  25         UNUSED(argc);
  26         UNUSED(argv);
  27
  28         if (git_libgit2_init() < 0)
  29                 abort();
  30
  31         return 0;
  32 }
  33
  34 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  35 {
  36         git_config *cfg = NULL;
  37         git_config_backend *backend = NULL;
  38         int err = 0;
  39
  40         if ((err = git_config_new(&cfg)) != 0) {
  41                 goto out;
  42         }
  43
  44         if ((err = git_config_backend_from_string(&backend, (const char*)data, size)) != 0) {
  45                 goto out;
  46         }
  47         if ((err = git_config_add_backend(cfg, backend, 0, NULL, 0)) != 0) {
  48                 goto out;
  49         }
  50         /* Now owned by the config */
  51         backend = NULL;
  52
  53         git_config_foreach(cfg, foreach_cb, NULL);
  54  out:
  55         git_config_backend_free(backend);
  56         git_config_free(cfg);
  57
  58         return 0;
  59 }