thodg/libgit2/fuzz/standalone_driver.c

• Show log

  Commit

• Hash : 60e610a2
  Author :
  Date : 2018-01-04T15:36:22
  

  fuzzers: add build support and instructions This change adds support for building a fuzz target for exercising the packfile parser, as well as documentation. It also runs the fuzzers in Travis to avoid regressions.

Download

• fuzz/standalone_driver.c

• /*
   * 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 <assert.h>
  #include <dirent.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <sys/types.h>
  
  #include "fileops.h"
  #include "path.h"
  
  extern int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size);
  extern int LLVMFuzzerInitialize(int *argc, char ***argv);
  
  static int run_one_file(const char *filename)
  {
  	git_buf buf = GIT_BUF_INIT;
  	int error = 0;
  
  	if (git_futils_readbuffer(&buf, filename) < 0) {
  		fprintf(stderr, "Failed to read %s: %m\n", filename);
  		error = -1;
  		goto exit;
  	}
  
  	LLVMFuzzerTestOneInput((const unsigned char *)buf.ptr, buf.size);
  exit:
  	git_buf_dispose(&buf);
  	return error;
  }
  
  int main(int argc, char **argv)
  {
  	git_vector corpus_files = GIT_VECTOR_INIT;
  	char *filename = NULL;
  	unsigned i = 0;
  	int error = 0;
  
  	if (argc != 2) {
  		fprintf(stderr, "Usage: %s <corpus directory>\n", argv[0]);
  		error = -1;
  		goto exit;
  	}
  
  	fprintf(stderr, "Running %s against %s\n", argv[0], argv[1]);
  	LLVMFuzzerInitialize(&argc, &argv);
  
  	if (git_path_dirload(&corpus_files, argv[1], 0, 0x0) < 0) {
  		fprintf(stderr, "Failed to scan corpus directory: %m\n");
  		error = -1;
  		goto exit;
  	}
  	git_vector_foreach(&corpus_files, i, filename) {
  		fprintf(stderr, "\tRunning %s...\n", filename);
  		if (run_one_file(filename) < 0) {
  			error = -1;
  			goto exit;
  		}
  	}
  	fprintf(stderr, "Done %d runs\n", i);
  
  exit:
  	git_vector_free_deep(&corpus_files);
  	return error;
  }
  

Download