def post(self):
"""Handle a post request."""
if not auth.get_current_user():
raise helpers.AccessDeniedException()
project = request.get('project')
fuzz_target = request.get('fuzz_target')
stacktrace = request.get('stacktrace')
state = stack_analyzer.get_crash_data(stacktrace,
symbolize_flag=False,
fuzz_target=fuzz_target,
already_symbolized=True,
detect_ooms_and_hangs=True)
security_flag = crash_analyzer.is_security_issue(
state.crash_stacktrace, state.crash_type, state.crash_address)
if data_handler.find_testcase(project, state.crash_type,
state.crash_state, security_flag):
new_or_duplicate = 'duplicate'
else:
new_or_duplicate = 'new'
return self.render_json({
'result': new_or_duplicate,
'state': state.crash_state,
'type': state.crash_type,
'security': security_flag,
})
def test_syzkaller_kasan_android_with_env(self):
"""Test syzkaller kasan."""
environment.set_value('OS_OVERRIDE', 'ANDROID')
environment.set_bot_environment()
self._real_read_data_from_file = utils.read_data_from_file
test_helpers.patch(self, [
'platforms.android.fetch_artifact.get',
'platforms.android.settings.get_kernel_build_id',
'platforms.android.settings.get_kernel_name',
'platforms.android.settings.get_product_brand',
'google_cloud_utils.storage.get_file_from_cache_if_exists',
'google_cloud_utils.storage.store_file_in_cache',
'base.utils.write_data_to_file', 'base.utils.read_data_from_file'
])
self.mock.get.side_effect = _mock_fetch_artifact_get
self.mock.get_kernel_build_id.return_value = '12345'
self.mock.get_kernel_name.return_value = 'device_kernel'
self.mock.get_product_brand.return_value = 'google'
self.mock.get_file_from_cache_if_exists.return_value = False
self.mock.store_file_in_cache.return_value = None
self.mock.write_data_to_file = None
self.mock.read_data_from_file.side_effect = self._mock_read_data_from_file
data = self._read_test_data('kasan_syzkaller_android.txt')
actual_state = stack_analyzer.get_crash_data(data)
self.assertEqual(actual_state.android_kernel_repo, KERNEL_REPRO)
def get_unsymbolized_data(self):
"""Compute unsymbolized crash data if necessary or return cached result."""
if self._unsymbolized_crash_data:
return self._unsymbolized_crash_data
self._unsymbolized_crash_data = stack_analyzer.get_crash_data(
self.output, symbolize_flag=False)
return self._unsymbolized_crash_data
def process_bad_units(self, bad_units_path, quarantine_corpus_path, crashes):
"""Process bad units found during merge."""
# TODO(ochang): A lot of this function is similar to parts of fuzz_task.
# Ideally fuzz_task can be refactored in a way that lets us share the common
# code.
environment.reset_current_memory_tool_options(redzone_size=DEFAULT_REDZONE)
self.runner.process_sanitizer_options()
logs.log('Processing bad units.')
corpus_file_paths = _get_corpus_file_paths(bad_units_path)
num_bad_units = 0
# Run each corpus item individually.
for i, unit_path in enumerate(corpus_file_paths, 1):
if i % 100 == 0:
logs.log('Up to %d' % i)
unit_name = os.path.basename(unit_path)
if unit_name.startswith('timeout-') or unit_name.startswith('oom-'):
# Don't waste time re-running timeout or oom testcases.
unit_path = self._quarantine_unit(unit_path, quarantine_corpus_path)
num_bad_units += 1
continue
result = self._run_single_unit(unit_path)
if (not result.timed_out and
not crash_analyzer.is_memory_tool_crash(result.output)):
# Didn't crash or time out.
continue
if result.timed_out:
# Slow unit. Quarantine it.
unit_path = self._quarantine_unit(unit_path, quarantine_corpus_path)
num_bad_units += 1
continue
# Get memory tool crash information.
state = stack_analyzer.get_crash_data(result.output, symbolize_flag=True)
# Crashed or caused a leak. Quarantine it.
unit_path = self._quarantine_unit(unit_path, quarantine_corpus_path)
num_bad_units += 1
if crash_analyzer.ignore_stacktrace(state.crash_stacktrace):
continue
# Local de-duplication.
if state.crash_state not in crashes:
security_flag = crash_analyzer.is_security_issue(
state.crash_stacktrace, state.crash_type, state.crash_address)
crashes[state.crash_state] = CorpusCrash(
state.crash_state, state.crash_type, state.crash_address,
state.crash_stacktrace, unit_path, security_flag)
logs.log('Found %d bad units, %d unique crashes.' % (num_bad_units,
len(crashes)))
def fuzz(self, target_path, options, reproducers_dir, max_time):
"""Run a fuzzing session.
Args:
target_path: Path to the fuzzer script or binary.
options: The FuzzOptions object returned by prepare().
reproducers_dir: The directory to put reproducers in when crashes
are found.
max_time: Maximum allowed time for the fuzzing to run.
Returns:
A FuzzResult object.
"""
# For blackbox fuzzers, |target_path| supplies the path to the fuzzer script
# rather than a target in the build archive.
fuzzer_path = target_path
os.chmod(fuzzer_path, 0o775)
app_path = environment.get_value('APP_PATH')
app_args = testcase_manager.get_command_line_for_application(
get_arguments_only=True).strip()
corpus_dir = options.corpus_dir
command_line_args = _get_arguments(app_path, app_args)
command_line_args.append(f'--input_dir={corpus_dir}')
result = _run_with_interpreter_if_needed(fuzzer_path, command_line_args,
max_time)
crashes = []
for testcase_path in os.listdir(reproducers_dir):
if not testcase_path.startswith(TESTCASE_PREFIX):
continue
output_path = OUTPUT_PREFIX + testcase_path[len(TESTCASE_PREFIX):]
absolute_output_path = os.path.join(reproducers_dir, output_path)
# If no output was written for a test case, skip it.
if not os.path.exists(absolute_output_path):
continue
with open(absolute_output_path, 'r', errors='replace') as handle:
output = handle.read()
# Filter obviously non-crashing test cases. Crashes still follow the
# normal flow in fuzz task to ensure that the state should not be ignored
# for other reasons, but we don't want to log every test case for the
# fuzzers that don't do their own crash processing.
state = stack_analyzer.get_crash_data(output)
if not state.crash_type:
continue
full_testcase_path = os.path.join(reproducers_dir, testcase_path)
crash = engine.Crash(full_testcase_path, output, options.arguments,
int(result.time_executed))
crashes.append(crash)
# TODO(mbarbella): Support stats.
stats = {}
return engine.FuzzResult(result.output, result.command, crashes, stats,
result.time_executed)
def test_parse_output_to_processed_report(self):
"""Tests if given output parses to the expected symbolized stack bytes."""
self.needs_file_delete = False
state = stack_analyzer.get_crash_data(SAMPLE_OUTPUT_TO_PARSE)
actual_report_bytes = crash_uploader.get_symbolized_stack_bytes(
state.crash_type, state.crash_address, state.frames)
with open(EXPECTED_PROCESSED_REPORT_PATH, 'rb') as expected_report:
expected_report_bytes = expected_report.read()
self.assertEqual(actual_report_bytes, expected_report_bytes)
def handle_update(testcase, revision, stacktrace, error):
"""Handle update."""
logs.log('Got external update for testcase.',
testcase_id=testcase.key.id())
if error:
_mark_errored(testcase, revision, error)
return
last_tested_revision = (testcase.get_metadata('last_tested_revision')
or testcase.crash_revision)
if revision < last_tested_revision:
logs.log_warn(f'Revision {revision} less than previously tested '
f'revision {last_tested_revision}.')
return
fuzz_target = testcase.get_fuzz_target()
if fuzz_target:
fuzz_target_name = fuzz_target.binary
else:
fuzz_target_name = None
# Record use of fuzz target to avoid garbage collection (since fuzz_task does
# not run).
data_handler.record_fuzz_target(fuzz_target.engine, fuzz_target.binary,
testcase.job_type)
state = stack_analyzer.get_crash_data(stacktrace,
fuzz_target=fuzz_target_name,
symbolize_flag=False,
already_symbolized=True,
detect_ooms_and_hangs=True)
crash_comparer = CrashComparer(state.crash_state, testcase.crash_state)
if not crash_comparer.is_similar():
logs.log(f'State no longer similar ('
f'testcase_id={testcase.key.id()}, '
f'old_state={testcase.crash_state}, '
f'new_state={state.crash_state})')
_mark_as_fixed(testcase, revision)
return
is_security = crash_analyzer.is_security_issue(state.crash_stacktrace,
state.crash_type,
state.crash_address)
if is_security != testcase.security_flag:
logs.log(f'Security flag for {testcase.key.id()} no longer matches.')
_mark_as_fixed(testcase, revision)
return
logs.log(f'{testcase.key.id()} still crashes.')
testcase.last_tested_crash_stacktrace = stacktrace
data_handler.update_progression_completion_metadata(testcase,
revision,
is_crash=True)
def parse(stacktrace, job_name):
"""Parse a stacktrace and return state, address, and type in dict."""
job = data_types.Job.query(data_types.Job.name == job_name).get()
if job:
os.environ.update(job.get_environment())
state = stack_analyzer.get_crash_data(stacktrace, symbolize_flag=False)
return {
'crash_type': state.crash_type,
'crash_address': state.crash_address,
'crash_state': state.crash_state
}
def test_lkl_linkification(self):
"""Test lkl linkification."""
environment.set_bot_environment()
self._real_read_data_from_file = utils.read_data_from_file
test_helpers.patch(self, [
'platforms.android.fetch_artifact.get',
'google_cloud_utils.storage.get_file_from_cache_if_exists',
'google_cloud_utils.storage.store_file_in_cache',
'base.utils.write_data_to_file', 'base.utils.read_data_from_file'
])
self.mock.get.side_effect = _mock_fetch_artifact_get
self.mock.get_file_from_cache_if_exists.return_value = False
self.mock.store_file_in_cache.return_value = None
self.mock.write_data_to_file = None
self.mock.read_data_from_file.side_effect = self._mock_read_data_from_file
data = self._read_test_data('lkl_libfuzzer_symbolized.txt')
expected_stack = self._read_test_data(
'lkl_libfuzzer_symbolized_linkified.txt')
actual_state = stack_analyzer.get_crash_data(data)
self.assertEqual(actual_state.crash_stacktrace, expected_stack)
def post(self):
"""Handle a post request."""
if not auth.get_current_user():
raise helpers.AccessDeniedException()
project = request.get('project')
fuzz_target = request.get('fuzz_target')
stacktrace = request.get('stacktrace')
state = stack_analyzer.get_crash_data(stacktrace,
symbolize_flag=False,
fuzz_target=fuzz_target,
already_symbolized=True,
detect_ooms_and_hangs=True)
security_flag = crash_analyzer.is_security_issue(
state.crash_stacktrace, state.crash_type, state.crash_address)
result = {
'state': state.crash_state,
'type': state.crash_type,
'security': security_flag,
}
duplicate_testcase = data_handler.find_testcase(
project, state.crash_type, state.crash_state, security_flag)
if duplicate_testcase:
result['result'] = 'duplicate'
result['duplicate_id'] = duplicate_testcase.key.id()
bug_id = (duplicate_testcase.bug_information
or duplicate_testcase.group_bug_information)
if bug_id:
result['bug_id'] = str(bug_id)
else:
result['result'] = 'new'
return self.render_json(result)
at com.example.foo.CrashyClass.crash(CrashyClass.java:6)
at com.bugsnag.android.example.ExampleActivity.crashUnhandled(ExampleActivity.kt:55)
at com.bugsnag.android.example.ExampleActivity$onCreate$1.invoke(ExampleActivity.kt:33)
at com.bugsnag.android.example.ExampleActivity$onCreate$1.invoke(ExampleActivity.kt:14)
at com.bugsnag.android.example.ExampleActivity$sam$android_view_View_OnClickListener$0.onClick(ExampleActivity.kt)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)"""
application_command_line = ""
state = stack_analyzer.get_crash_data(unsymbolized_crash_stacktrace,
symbolize_flag=False,
already_symbolized=True)
security_flag = crash_analyzer.is_security_issue(unsymbolized_crash_stacktrace,
state.crash_type,
state.crash_address)
key = '%s,%s,%s' % (state.crash_type, state.crash_state, security_flag)
should_be_ignored = crash_analyzer.ignore_stacktrace(state.crash_stacktrace)
print("key:", key)
# sample output:
# key: Fatal Exception,com.example.foo.CrashyClass.sendMessage
# com.example.foo.CrashyClass.crash
# com.bugsnag.android.example.ExampleActivity.crashUnhandled
# ,False
def do_post(self):
"""Upload a testcase."""
email = helpers.get_user_email()
testcase_id = request.get('testcaseId')
uploaded_file = self.get_upload()
if testcase_id and not uploaded_file:
testcase = helpers.get_testcase(testcase_id)
if not access.can_user_access_testcase(testcase):
raise helpers.AccessDeniedException()
# Use minimized testcase for upload (if available).
key = (testcase.minimized_keys if testcase.minimized_keys
and testcase.minimized_keys != 'NA' else
testcase.fuzzed_keys)
uploaded_file = blobs.get_blob_info(key)
# Extract filename part from blob.
uploaded_file.filename = os.path.basename(
uploaded_file.filename.replace('\\', os.sep))
job_type = request.get('job')
if not job_type:
raise helpers.EarlyExitException('Missing job name.', 400)
job = data_types.Job.query(data_types.Job.name == job_type).get()
if not job:
raise helpers.EarlyExitException('Invalid job name.', 400)
fuzzer_name = request.get('fuzzer')
job_type_lowercase = job_type.lower()
if 'libfuzzer' in job_type_lowercase:
fuzzer_name = 'libFuzzer'
elif 'afl' in job_type_lowercase:
fuzzer_name = 'afl'
elif 'honggfuzz' in job_type_lowercase:
fuzzer_name = 'honggfuzz'
is_engine_job = fuzzer_name and environment.is_engine_fuzzer_job(
job_type)
target_name = request.get('target')
if not is_engine_job and target_name:
raise helpers.EarlyExitException(
'Target name is not applicable to non-engine jobs (AFL, libFuzzer).',
400)
if is_engine_job and not target_name:
raise helpers.EarlyExitException(
'Missing target name for engine job (AFL, libFuzzer).', 400)
if (target_name
and not data_types.Fuzzer.VALID_NAME_REGEX.match(target_name)):
raise helpers.EarlyExitException('Invalid target name.', 400)
fully_qualified_fuzzer_name = ''
if is_engine_job and target_name:
if job.is_external():
# External jobs don't run and set FuzzTarget entities as part of
# fuzz_task. Set it here instead.
fuzz_target = (data_handler.record_fuzz_target(
fuzzer_name, target_name, job_type))
fully_qualified_fuzzer_name = fuzz_target.fully_qualified_name(
)
target_name = fuzz_target.binary
else:
fully_qualified_fuzzer_name, target_name = find_fuzz_target(
fuzzer_name, target_name, job_type)
if (not access.has_access(need_privileged_access=False,
job_type=job_type,
fuzzer_name=(fully_qualified_fuzzer_name
or fuzzer_name))
and not _is_uploader_allowed(email)):
raise helpers.AccessDeniedException()
multiple_testcases = bool(request.get('multiple'))
http_flag = bool(request.get('http'))
high_end_job = bool(request.get('highEnd'))
bug_information = request.get('issue')
crash_revision = request.get('revision')
timeout = request.get('timeout')
retries = request.get('retries')
bug_summary_update_flag = bool(request.get('updateIssue'))
quiet_flag = bool(request.get('quiet'))
additional_arguments = request.get('args')
app_launch_command = request.get('cmd')
platform_id = request.get('platform')
issue_labels = request.get('issue_labels')
gestures = request.get('gestures') or '[]'
stacktrace = request.get('stacktrace')
crash_data = None
if job.is_external():
if not stacktrace:
raise helpers.EarlyExitException(
'Stacktrace required for external jobs.', 400)
if not crash_revision:
raise helpers.EarlyExitException(
'Revision required for external jobs.', 400)
crash_data = stack_analyzer.get_crash_data(
stacktrace,
fuzz_target=target_name,
symbolize_flag=False,
already_symbolized=True,
detect_ooms_and_hangs=True)
elif stacktrace:
raise helpers.EarlyExitException(
'Should not specify stacktrace for non-external jobs.', 400)
testcase_metadata = request.get('metadata', {})
if testcase_metadata:
try:
testcase_metadata = json.loads(testcase_metadata)
except Exception as e:
raise helpers.EarlyExitException('Invalid metadata JSON.',
400) from e
if not isinstance(testcase_metadata, dict):
raise helpers.EarlyExitException(
'Metadata is not a JSON object.', 400)
if issue_labels:
testcase_metadata['issue_labels'] = issue_labels
try:
gestures = ast.literal_eval(gestures)
except Exception as e:
raise helpers.EarlyExitException('Failed to parse gestures.',
400) from e
archive_state = 0
bundled = False
file_path_input = ''
# Certain modifications such as app launch command, issue updates are only
# allowed for privileged users.
privileged_user = access.has_access(need_privileged_access=True)
if not privileged_user:
if bug_information or bug_summary_update_flag:
raise helpers.EarlyExitException(
'You are not privileged to update existing issues.', 400)
need_privileged_access = utils.string_is_true(
data_handler.get_value_from_job_definition(
job_type, 'PRIVILEGED_ACCESS'))
if need_privileged_access:
raise helpers.EarlyExitException(
'You are not privileged to run this job type.', 400)
if app_launch_command:
raise helpers.EarlyExitException(
'You are not privileged to run arbitrary launch commands.',
400)
if (testcase_metadata
and not _allow_unprivileged_metadata(testcase_metadata)):
raise helpers.EarlyExitException(
'You are not privileged to set testcase metadata.', 400)
if additional_arguments:
raise helpers.EarlyExitException(
'You are not privileged to add command-line arguments.',
400)
if gestures:
raise helpers.EarlyExitException(
'You are not privileged to run arbitrary gestures.', 400)
# TODO(aarya): Remove once AFL is migrated to engine pipeline.
if target_name:
additional_arguments = '%TESTCASE%'
if crash_revision and crash_revision.isdigit():
crash_revision = int(crash_revision)
else:
crash_revision = 0
if bug_information == '0': # Auto-recover from this bad input.
bug_information = None
if bug_information and not bug_information.isdigit():
raise helpers.EarlyExitException('Bug is not a number.', 400)
if not timeout:
timeout = 0
elif not timeout.isdigit() or timeout == '0':
raise helpers.EarlyExitException(
'Testcase timeout must be a number greater than 0.', 400)
else:
timeout = int(timeout)
if timeout > 120:
raise helpers.EarlyExitException(
'Testcase timeout may not be greater than 120 seconds.',
400)
if retries:
if retries.isdigit():
retries = int(retries)
else:
retries = None
if retries is None or retries > MAX_RETRIES:
raise helpers.EarlyExitException(
'Testcase retries must be a number less than %d.' %
MAX_RETRIES, 400)
else:
retries = None
job_queue = tasks.queue_for_job(job_type, is_high_end=high_end_job)
if uploaded_file is not None:
filename = ''.join([
x for x in uploaded_file.filename
if x not in ' ;/?:@&=+$,{}|<>()\\'
])
key = str(uploaded_file.key())
if archive.is_archive(filename):
archive_state = data_types.ArchiveStatus.FUZZED
if archive_state:
if multiple_testcases:
# Create a job to unpack an archive.
metadata = data_types.BundledArchiveMetadata()
metadata.blobstore_key = key
metadata.timeout = timeout
metadata.job_queue = job_queue
metadata.job_type = job_type
metadata.http_flag = http_flag
metadata.archive_filename = filename
metadata.uploader_email = email
metadata.gestures = gestures
metadata.crash_revision = crash_revision
metadata.additional_arguments = additional_arguments
metadata.bug_information = bug_information
metadata.platform_id = platform_id
metadata.app_launch_command = app_launch_command
metadata.fuzzer_name = fuzzer_name
metadata.overridden_fuzzer_name = fully_qualified_fuzzer_name
metadata.fuzzer_binary_name = target_name
metadata.put()
tasks.add_task('unpack',
str(metadata.key.id()),
job_type,
queue=tasks.queue_for_job(job_type))
# Create a testcase metadata object to show the user their upload.
upload_metadata = data_types.TestcaseUploadMetadata()
upload_metadata.timestamp = datetime.datetime.utcnow()
upload_metadata.filename = filename
upload_metadata.blobstore_key = key
upload_metadata.original_blobstore_key = key
upload_metadata.status = 'Pending'
upload_metadata.bundled = True
upload_metadata.uploader_email = email
upload_metadata.retries = retries
upload_metadata.bug_summary_update_flag = bug_summary_update_flag
upload_metadata.quiet_flag = quiet_flag
upload_metadata.additional_metadata_string = json.dumps(
testcase_metadata)
upload_metadata.bug_information = bug_information
upload_metadata.put()
helpers.log('Uploaded multiple testcases.',
helpers.VIEW_OPERATION)
return self.render_json({'multiple': True})
file_path_input = guess_input_file(uploaded_file, filename)
if not file_path_input:
raise helpers.EarlyExitException((
"Unable to detect which file to launch. The main file\'s name "
'must contain either of %s.' % str(RUN_FILE_PATTERNS)),
400)
else:
raise helpers.EarlyExitException('Please select a file to upload.',
400)
testcase_id = data_handler.create_user_uploaded_testcase(
key,
key,
archive_state,
filename,
file_path_input,
timeout,
job,
job_queue,
http_flag,
gestures,
additional_arguments,
bug_information,
crash_revision,
email,
platform_id,
app_launch_command,
fuzzer_name,
fully_qualified_fuzzer_name,
target_name,
bundled,
retries,
bug_summary_update_flag,
quiet_flag,
additional_metadata=testcase_metadata,
crash_data=crash_data)
if not quiet_flag:
testcase = data_handler.get_testcase_by_id(testcase_id)
issue = issue_tracker_utils.get_issue_for_testcase(testcase)
if issue:
report_url = data_handler.TESTCASE_REPORT_URL.format(
domain=data_handler.get_domain(), testcase_id=testcase_id)
comment = ('ClusterFuzz is analyzing your testcase. '
'Developers can follow the progress at %s.' %
report_url)
issue.save(new_comment=comment)
helpers.log('Uploaded testcase %s' % testcase_id,
helpers.VIEW_OPERATION)
return self.render_json({'id': '%s' % testcase_id})
