Coverage for /pythoncovmergedfiles/medio/medio/src/fuzz_curs_exec.py: 59%

1###### Coverage stub 

2import atexit 

3import coverage 

4cov = coverage.coverage(data_file='.coverage', cover_pylib=True) 

5cov.start() 

6# Register an exist handler that will print coverage 

7def exit_handler(): 

8 cov.stop() 

9 cov.save() 

10atexit.register(exit_handler) 

11####### End of coverage stub 

12#!/usr/bin/python3 

13# Copyright 2022 Google LLC 

14# 

15# Licensed under the Apache License, Version 2.0 (the "License"); 

16# you may not use this file except in compliance with the License. 

17# You may obtain a copy of the License at 

18# 

19# http://www.apache.org/licenses/LICENSE-2.0 

20# 

21# Unless required by applicable law or agreed to in writing, software 

22# distributed under the License is distributed on an "AS IS" BASIS, 

23# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

24# See the License for the specific language governing permissions and 

25# limitations under the License. 

26"""Fuzzer that targets native code of pyodbc with a fake odbc driver""" 

27import os 

28import sys 

29import atheris 

30import pyodbc 

31 

32@atheris.instrument_func 

33def fuzz_exec(data): 

34 fdp = atheris.FuzzedDataProvider(data) 

35 connstr = "DRIVER=FUZZ;" 

36 s1 = fdp.ConsumeUnicodeNoSurrogates(50) 

37 if "DRIVER" in s1: 

38 return 

39 cstr = connstr + s1 

40 connection_obj = pyodbc.connect(cstr) 

41 csr = connection_obj.cursor() 

42 try: 

43 csr.execute(fdp.ConsumeUnicodeNoSurrogates(20)) 

44 except Exception as e: 

45 if "Invalid string or buffer length" in str(e): 

46 pass 

47 else: 

48 raise e 

49 return 0 

50 

51@atheris.instrument_func 

52def TestOneInput(data): 

53 try: 

54 return fuzz_exec(data) 

55 except SystemError: 

56 return 0 

57 

58 

59def main(): 

60 # Write the odbcinst.ini file 

61 dir_path = os.path.dirname(os.path.realpath(__file__)) 

62 with open("/tmp/odbcinst.ini", "w") as f: 

63 f.write("[FUZZ]\n") 

64 f.write("Driver=%s/fuzzodbc.so\n"%(dir_path)) 

65 os.environ['ODBCSYSINI'] = '/tmp/' 

66 

67 atheris.instrument_all() 

68 atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True) 

69 atheris.Fuzz() 

70 

71 

72if __name__ == "__main__": 

73 main()