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 #include "standalone_driver.h"
  14
  15 #define UNUSED(x) (void)(x)
  16
  17 int LLVMFuzzerInitialize(int *argc, char ***argv)
  18 {
  19         UNUSED(argc);
  20         UNUSED(argv);
  21
  22         if (git_libgit2_init() < 0)
  23                 abort();
  24
  25         return 0;
  26 }
  27
  28 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  29 {
  30         const git_object_t types[] = {
  31                 GIT_OBJECT_BLOB, GIT_OBJECT_TREE, GIT_OBJECT_COMMIT, GIT_OBJECT_TAG
  32         };
  33         git_object *object = NULL;
  34         size_t i;
  35
  36         /*
  37          * Brute-force parse this as every object type. We want
  38          * to stress the parsing logic anyway, so this is fine
  39          * to do.
  40          */
  41         for (i = 0; i < ARRAY_SIZE(types); i++) {
  42                 if (git_object__from_raw(&object, (const char *) data, size, types[i]) < 0)
  43                         continue;
  44                 git_object_free(object);
  45                 object = NULL;
  46         }
  47
  48         return 0;
  49 }