fuzzers/objects_fuzzer.c

   1 /*
   2  * libgit2 packfile fuzzer 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 "object.h"
  12
  13 #define UNUSED(x) (void)(x)
  14
  15 int LLVMFuzzerInitialize(int *argc, char ***argv)
  16 {
  17         UNUSED(argc);
  18         UNUSED(argv);
  19
  20         if (git_libgit2_init() < 0)
  21                 abort();
  22
  23         return 0;
  24 }
  25
  26 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  27 {
  28         const git_object_t types[] = {
  29                 GIT_OBJECT_BLOB, GIT_OBJECT_TREE, GIT_OBJECT_COMMIT, GIT_OBJECT_TAG
  30         };
  31         git_object *object = NULL;
  32         size_t i;
  33
  34         /*
  35          * Brute-force parse this as every object type. We want
  36          * to stress the parsing logic anyway, so this is fine
  37          * to do.
  38          */
  39         for (i = 0; i < ARRAY_SIZE(types); i++) {
  40                 if (git_object__from_raw(&object, (const char *) data, size, types[i]) < 0)
  41                         continue;
  42                 git_object_free(object);
  43                 object = NULL;
  44         }
  45
  46         return 0;
  47 }