cd67daaa93
Change sys.maxint to sys.maxsize.
This is necessary for Python 3 compatibility.
Done using:
$ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \
sort -u | grep -v README.sh4)
$ futurize -w -f lib2to3.fixes.fix_renames $py
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180608122952.2009-9-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
432 lines
16 KiB
Python
Executable File
432 lines
16 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
# Tool for running fuzz tests
|
|
#
|
|
# Copyright (C) 2014 Maria Kustova <maria.k@catit.be>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
from __future__ import print_function
|
|
import sys
|
|
import os
|
|
import signal
|
|
import subprocess
|
|
import random
|
|
import shutil
|
|
from itertools import count
|
|
import time
|
|
import getopt
|
|
import StringIO
|
|
import resource
|
|
|
|
try:
|
|
import json
|
|
except ImportError:
|
|
try:
|
|
import simplejson as json
|
|
except ImportError:
|
|
print("Warning: Module for JSON processing is not found.\n" \
|
|
"'--config' and '--command' options are not supported.", file=sys.stderr)
|
|
|
|
# Backing file sizes in MB
|
|
MAX_BACKING_FILE_SIZE = 10
|
|
MIN_BACKING_FILE_SIZE = 1
|
|
|
|
|
|
def multilog(msg, *output):
|
|
""" Write an object to all of specified file descriptors."""
|
|
for fd in output:
|
|
fd.write(msg)
|
|
fd.flush()
|
|
|
|
|
|
def str_signal(sig):
|
|
""" Convert a numeric value of a system signal to the string one
|
|
defined by the current operational system.
|
|
"""
|
|
for k, v in signal.__dict__.items():
|
|
if v == sig:
|
|
return k
|
|
|
|
|
|
def run_app(fd, q_args):
|
|
"""Start an application with specified arguments and return its exit code
|
|
or kill signal depending on the result of execution.
|
|
"""
|
|
|
|
class Alarm(Exception):
|
|
"""Exception for signal.alarm events."""
|
|
pass
|
|
|
|
def handler(*args):
|
|
"""Notify that an alarm event occurred."""
|
|
raise Alarm
|
|
|
|
signal.signal(signal.SIGALRM, handler)
|
|
signal.alarm(600)
|
|
term_signal = signal.SIGKILL
|
|
devnull = open('/dev/null', 'r+')
|
|
process = subprocess.Popen(q_args, stdin=devnull,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
try:
|
|
out, err = process.communicate()
|
|
signal.alarm(0)
|
|
fd.write(out)
|
|
fd.write(err)
|
|
fd.flush()
|
|
return process.returncode
|
|
|
|
except Alarm:
|
|
os.kill(process.pid, term_signal)
|
|
fd.write('The command was terminated by timeout.\n')
|
|
fd.flush()
|
|
return -term_signal
|
|
|
|
|
|
class TestException(Exception):
|
|
"""Exception for errors risen by TestEnv objects."""
|
|
pass
|
|
|
|
|
|
class TestEnv(object):
|
|
|
|
"""Test object.
|
|
|
|
The class sets up test environment, generates backing and test images
|
|
and executes application under tests with specified arguments and a test
|
|
image provided.
|
|
|
|
All logs are collected.
|
|
|
|
The summary log will contain short descriptions and statuses of tests in
|
|
a run.
|
|
|
|
The test log will include application (e.g. 'qemu-img') logs besides info
|
|
sent to the summary log.
|
|
"""
|
|
|
|
def __init__(self, test_id, seed, work_dir, run_log,
|
|
cleanup=True, log_all=False):
|
|
"""Set test environment in a specified work directory.
|
|
|
|
Path to qemu-img and qemu-io will be retrieved from 'QEMU_IMG' and
|
|
'QEMU_IO' environment variables.
|
|
"""
|
|
if seed is not None:
|
|
self.seed = seed
|
|
else:
|
|
self.seed = str(random.randint(0, sys.maxsize))
|
|
random.seed(self.seed)
|
|
|
|
self.init_path = os.getcwd()
|
|
self.work_dir = work_dir
|
|
self.current_dir = os.path.join(work_dir, 'test-' + test_id)
|
|
self.qemu_img = \
|
|
os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
|
|
self.qemu_io = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
|
|
self.commands = [['qemu-img', 'check', '-f', 'qcow2', '$test_img'],
|
|
['qemu-img', 'info', '-f', 'qcow2', '$test_img'],
|
|
['qemu-io', '$test_img', '-c', 'read $off $len'],
|
|
['qemu-io', '$test_img', '-c', 'write $off $len'],
|
|
['qemu-io', '$test_img', '-c',
|
|
'aio_read $off $len'],
|
|
['qemu-io', '$test_img', '-c',
|
|
'aio_write $off $len'],
|
|
['qemu-io', '$test_img', '-c', 'flush'],
|
|
['qemu-io', '$test_img', '-c',
|
|
'discard $off $len'],
|
|
['qemu-io', '$test_img', '-c',
|
|
'truncate $off']]
|
|
for fmt in ['raw', 'vmdk', 'vdi', 'qcow2', 'file', 'qed', 'vpc']:
|
|
self.commands.append(
|
|
['qemu-img', 'convert', '-f', 'qcow2', '-O', fmt,
|
|
'$test_img', 'converted_image.' + fmt])
|
|
|
|
try:
|
|
os.makedirs(self.current_dir)
|
|
except OSError as e:
|
|
print("Error: The working directory '%s' cannot be used. Reason: %s"\
|
|
% (self.work_dir, e[1]), file=sys.stderr)
|
|
raise TestException
|
|
self.log = open(os.path.join(self.current_dir, "test.log"), "w")
|
|
self.parent_log = open(run_log, "a")
|
|
self.failed = False
|
|
self.cleanup = cleanup
|
|
self.log_all = log_all
|
|
|
|
def _create_backing_file(self):
|
|
"""Create a backing file in the current directory.
|
|
|
|
Return a tuple of a backing file name and format.
|
|
|
|
Format of a backing file is randomly chosen from all formats supported
|
|
by 'qemu-img create'.
|
|
"""
|
|
# All formats supported by the 'qemu-img create' command.
|
|
backing_file_fmt = random.choice(['raw', 'vmdk', 'vdi', 'qcow2',
|
|
'file', 'qed', 'vpc'])
|
|
backing_file_name = 'backing_img.' + backing_file_fmt
|
|
backing_file_size = random.randint(MIN_BACKING_FILE_SIZE,
|
|
MAX_BACKING_FILE_SIZE) * (1 << 20)
|
|
cmd = self.qemu_img + ['create', '-f', backing_file_fmt,
|
|
backing_file_name, str(backing_file_size)]
|
|
temp_log = StringIO.StringIO()
|
|
retcode = run_app(temp_log, cmd)
|
|
if retcode == 0:
|
|
temp_log.close()
|
|
return (backing_file_name, backing_file_fmt)
|
|
else:
|
|
multilog("Warning: The %s backing file was not created.\n\n"
|
|
% backing_file_fmt, sys.stderr, self.log, self.parent_log)
|
|
self.log.write("Log for the failure:\n" + temp_log.getvalue() +
|
|
'\n\n')
|
|
temp_log.close()
|
|
return (None, None)
|
|
|
|
def execute(self, input_commands=None, fuzz_config=None):
|
|
""" Execute a test.
|
|
|
|
The method creates backing and test images, runs test app and analyzes
|
|
its exit status. If the application was killed by a signal, the test
|
|
is marked as failed.
|
|
"""
|
|
if input_commands is None:
|
|
commands = self.commands
|
|
else:
|
|
commands = input_commands
|
|
|
|
os.chdir(self.current_dir)
|
|
backing_file_name, backing_file_fmt = self._create_backing_file()
|
|
img_size = image_generator.create_image(
|
|
'test.img', backing_file_name, backing_file_fmt, fuzz_config)
|
|
for item in commands:
|
|
shutil.copy('test.img', 'copy.img')
|
|
# 'off' and 'len' are multiple of the sector size
|
|
sector_size = 512
|
|
start = random.randrange(0, img_size + 1, sector_size)
|
|
end = random.randrange(start, img_size + 1, sector_size)
|
|
|
|
if item[0] == 'qemu-img':
|
|
current_cmd = list(self.qemu_img)
|
|
elif item[0] == 'qemu-io':
|
|
current_cmd = list(self.qemu_io)
|
|
else:
|
|
multilog("Warning: test command '%s' is not defined.\n"
|
|
% item[0], sys.stderr, self.log, self.parent_log)
|
|
continue
|
|
# Replace all placeholders with their real values
|
|
for v in item[1:]:
|
|
c = (v
|
|
.replace('$test_img', 'copy.img')
|
|
.replace('$off', str(start))
|
|
.replace('$len', str(end - start)))
|
|
current_cmd.append(c)
|
|
|
|
# Log string with the test header
|
|
test_summary = "Seed: %s\nCommand: %s\nTest directory: %s\n" \
|
|
"Backing file: %s\n" \
|
|
% (self.seed, " ".join(current_cmd),
|
|
self.current_dir, backing_file_name)
|
|
temp_log = StringIO.StringIO()
|
|
try:
|
|
retcode = run_app(temp_log, current_cmd)
|
|
except OSError as e:
|
|
multilog("%sError: Start of '%s' failed. Reason: %s\n\n"
|
|
% (test_summary, os.path.basename(current_cmd[0]),
|
|
e[1]),
|
|
sys.stderr, self.log, self.parent_log)
|
|
raise TestException
|
|
|
|
if retcode < 0:
|
|
self.log.write(temp_log.getvalue())
|
|
multilog("%sFAIL: Test terminated by signal %s\n\n"
|
|
% (test_summary, str_signal(-retcode)),
|
|
sys.stderr, self.log, self.parent_log)
|
|
self.failed = True
|
|
else:
|
|
if self.log_all:
|
|
self.log.write(temp_log.getvalue())
|
|
multilog("%sPASS: Application exited with the code " \
|
|
"'%d'\n\n" % (test_summary, retcode),
|
|
sys.stdout, self.log, self.parent_log)
|
|
temp_log.close()
|
|
os.remove('copy.img')
|
|
|
|
def finish(self):
|
|
"""Restore the test environment after a test execution."""
|
|
self.log.close()
|
|
self.parent_log.close()
|
|
os.chdir(self.init_path)
|
|
if self.cleanup and not self.failed:
|
|
shutil.rmtree(self.current_dir)
|
|
|
|
if __name__ == '__main__':
|
|
|
|
def usage():
|
|
print("""
|
|
Usage: runner.py [OPTION...] TEST_DIR IMG_GENERATOR
|
|
|
|
Set up test environment in TEST_DIR and run a test in it. A module for
|
|
test image generation should be specified via IMG_GENERATOR.
|
|
|
|
Example:
|
|
runner.py -c '[["qemu-img", "info", "$test_img"]]' /tmp/test qcow2
|
|
|
|
Optional arguments:
|
|
-h, --help display this help and exit
|
|
-d, --duration=NUMBER finish tests after NUMBER of seconds
|
|
-c, --command=JSON run tests for all commands specified in
|
|
the JSON array
|
|
-s, --seed=STRING seed for a test image generation,
|
|
by default will be generated randomly
|
|
--config=JSON take fuzzer configuration from the JSON
|
|
array
|
|
-k, --keep_passed don't remove folders of passed tests
|
|
-v, --verbose log information about passed tests
|
|
|
|
JSON:
|
|
|
|
'--command' accepts a JSON array of commands. Each command presents
|
|
an application under test with all its parameters as a list of strings,
|
|
e.g. ["qemu-io", "$test_img", "-c", "write $off $len"].
|
|
|
|
Supported application aliases: 'qemu-img' and 'qemu-io'.
|
|
|
|
Supported argument aliases: $test_img for the fuzzed image, $off
|
|
for an offset, $len for length.
|
|
|
|
Values for $off and $len will be generated based on the virtual disk
|
|
size of the fuzzed image.
|
|
|
|
Paths to 'qemu-img' and 'qemu-io' are retrevied from 'QEMU_IMG' and
|
|
'QEMU_IO' environment variables.
|
|
|
|
'--config' accepts a JSON array of fields to be fuzzed, e.g.
|
|
'[["header"], ["header", "version"]]'.
|
|
|
|
Each of the list elements can consist of a complex image element only
|
|
as ["header"] or ["feature_name_table"] or an exact field as
|
|
["header", "version"]. In the first case random portion of the element
|
|
fields will be fuzzed, in the second one the specified field will be
|
|
fuzzed always.
|
|
|
|
If '--config' argument is specified, fields not listed in
|
|
the configuration array will not be fuzzed.
|
|
""")
|
|
|
|
def run_test(test_id, seed, work_dir, run_log, cleanup, log_all,
|
|
command, fuzz_config):
|
|
"""Setup environment for one test and execute this test."""
|
|
try:
|
|
test = TestEnv(test_id, seed, work_dir, run_log, cleanup,
|
|
log_all)
|
|
except TestException:
|
|
sys.exit(1)
|
|
|
|
# Python 2.4 doesn't support 'finally' and 'except' in the same 'try'
|
|
# block
|
|
try:
|
|
try:
|
|
test.execute(command, fuzz_config)
|
|
except TestException:
|
|
sys.exit(1)
|
|
finally:
|
|
test.finish()
|
|
|
|
def should_continue(duration, start_time):
|
|
"""Return True if a new test can be started and False otherwise."""
|
|
current_time = int(time.time())
|
|
return (duration is None) or (current_time - start_time < duration)
|
|
|
|
try:
|
|
opts, args = getopt.gnu_getopt(sys.argv[1:], 'c:hs:kvd:',
|
|
['command=', 'help', 'seed=', 'config=',
|
|
'keep_passed', 'verbose', 'duration='])
|
|
except getopt.error as e:
|
|
print("Error: %s\n\nTry 'runner.py --help' for more information" % e, file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
command = None
|
|
cleanup = True
|
|
log_all = False
|
|
seed = None
|
|
config = None
|
|
duration = None
|
|
for opt, arg in opts:
|
|
if opt in ('-h', '--help'):
|
|
usage()
|
|
sys.exit()
|
|
elif opt in ('-c', '--command'):
|
|
try:
|
|
command = json.loads(arg)
|
|
except (TypeError, ValueError, NameError) as e:
|
|
print("Error: JSON array of test commands cannot be loaded.\n" \
|
|
"Reason: %s" % e, file=sys.stderr)
|
|
sys.exit(1)
|
|
elif opt in ('-k', '--keep_passed'):
|
|
cleanup = False
|
|
elif opt in ('-v', '--verbose'):
|
|
log_all = True
|
|
elif opt in ('-s', '--seed'):
|
|
seed = arg
|
|
elif opt in ('-d', '--duration'):
|
|
duration = int(arg)
|
|
elif opt == '--config':
|
|
try:
|
|
config = json.loads(arg)
|
|
except (TypeError, ValueError, NameError) as e:
|
|
print("Error: JSON array with the fuzzer configuration cannot" \
|
|
" be loaded\nReason: %s" % e, file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
if not len(args) == 2:
|
|
print("Expected two parameters\nTry 'runner.py --help'" \
|
|
" for more information.", file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
work_dir = os.path.realpath(args[0])
|
|
# run_log is created in 'main', because multiple tests are expected to
|
|
# log in it
|
|
run_log = os.path.join(work_dir, 'run.log')
|
|
|
|
# Add the path to the image generator module to sys.path
|
|
sys.path.append(os.path.realpath(os.path.dirname(args[1])))
|
|
# Remove a script extension from image generator module if any
|
|
generator_name = os.path.splitext(os.path.basename(args[1]))[0]
|
|
|
|
try:
|
|
image_generator = __import__(generator_name)
|
|
except ImportError as e:
|
|
print("Error: The image generator '%s' cannot be imported.\n" \
|
|
"Reason: %s" % (generator_name, e), file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
# Enable core dumps
|
|
resource.setrlimit(resource.RLIMIT_CORE, (-1, -1))
|
|
# If a seed is specified, only one test will be executed.
|
|
# Otherwise runner will terminate after a keyboard interruption
|
|
start_time = int(time.time())
|
|
test_id = count(1)
|
|
while should_continue(duration, start_time):
|
|
try:
|
|
run_test(str(next(test_id)), seed, work_dir, run_log, cleanup,
|
|
log_all, command, config)
|
|
except (KeyboardInterrupt, SystemExit):
|
|
sys.exit(1)
|
|
|
|
if seed is not None:
|
|
break
|