thodg/libgit2/fuzzers/corpora/patch_parse/patch_fuzzer-patch.diff

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• Hash : 92e011a7
  Author :
  Date : 2019-10-15T16:22:35
  

  fuzzers: add a new fuzzer for patch parsing I was looking at this code anyway because the sr.ht people nerdsniped me, and it gave me that "I should fuzz this" feeling. So have a fuzzer!

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• fuzzers/corpora/patch_parse/patch_fuzzer-patch.diff

• 
  diff --git a/fuzzers/patch_fuzzer.c b/fuzzers/patch_fuzzer.c
  new file mode 100644
  index 000000000..76186b6fb
  --- /dev/null
  +++ b/fuzzers/patch_fuzzer.c
  @@ -0,0 +1,39 @@
  +/*
  + * libgit2 patch fuzzer target.
  + *
  + * Copyright (C) the libgit2 contributors. All rights reserved.
  + *
  + * This file is part of libgit2, distributed under the GNU GPL v2 with
  + * a Linking Exception. For full terms see the included COPYING file.
  + */
  +
  +#include "git2.h"
  +#include "patch.h"
  +#include "patch_parse.h"
  +
  +#define UNUSED(x) (void)(x)
  +
  +int LLVMFuzzerInitialize(int *argc, char ***argv)
  +{
  +        UNUSED(argc);
  +        UNUSED(argv);
  +
  +        if (git_libgit2_init() < 0)
  +                abort();
  +
  +        return 0;
  +}
  +
  +int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  +{
  +        if (size < 1) {
  +                return 0;
  +        }
  +        git_patch* patch;
  +        git_patch_options opts = {(uint32_t)data[0]};
  +        int status = git_patch_from_buffer(&patch, (const char*)data+1, size-1, &opts);
  +        if (status == 0 && patch) {
  +                git_patch_free(patch);
  +        }
  +        return 0;
  +}
  

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