# Unix SMB/CIFS implementation. # # Copyright (C) Catalyst.Net Ltd. 2017 # # 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 3 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 . # """Test whether various python calls segfault when given unexpected input. """ import samba.tests import os import sys from samba.net import Net, LIBNET_JOIN_AUTOMATIC from samba.credentials import DONT_USE_KERBEROS from samba import NTSTATUSError, ntstatus from samba.dcerpc import misc, drsuapi, samr, unixinfo, dnsserver from samba import auth, gensec from samba.samdb import SamDB from samba import netbios from samba import registry from samba import ldb from samba import messaging import traceback def segfault_detector(f): def wrapper(*args, **kwargs): pid = os.fork() if pid == 0: try: f(*args, **kwargs) except Exception as e: traceback.print_exc() sys.stderr.flush() sys.stdout.flush() os._exit(0) pid2, status = os.waitpid(pid, 0) if os.WIFSIGNALED(status): signal = os.WTERMSIG(status) raise AssertionError("Failed with signal %d" % signal) return wrapper def no_gdb_backtrace(f): from os import environ def w(*args, **kwargs): environ['PLEASE_NO_GDB_BACKTRACE'] = '1' f(*args, **kwargs) del environ['PLEASE_NO_GDB_BACKTRACE'] return w class SegfaultTests(samba.tests.TestCase): def get_lp_et_al(self): server = os.environ["SERVER"] lp = self.get_loadparm() creds = self.insta_creds(template=self.get_credentials(), kerberos_state=DONT_USE_KERBEROS) return lp, creds, server def get_samdb(self): lp, creds, server = self.get_lp_et_al() url = 'ldap://' + server ldb = SamDB(url, credentials=creds, lp=lp) return ldb @segfault_detector def test_net_replicate_init__1(self): lp, creds, server = self.get_lp_et_al() net = Net(creds, lp, server=server) net.replicate_init(42, lp, None, misc.GUID()) @no_gdb_backtrace @segfault_detector def test_net_replicate_init__3(self): # third argument is also unchecked samdb = self.get_samdb() lp, creds, server = self.get_lp_et_al() net = Net(creds, lp, server=server) net.replicate_init(samdb, lp, 42, misc.GUID()) @segfault_detector def test_net_replicate_chunk_1(self): lp, creds, server = self.get_lp_et_al() ctr = drsuapi.DsGetNCChangesCtr6() net = Net(creds, lp, server=server) net.replicate_chunk(42, 1, ctr) @segfault_detector def test_auth_context_gensec_start_server(self): a = auth.AuthContext(ldb=42, methods=['sam']) # there is no failure yet because the ldb is not actually # dereferenced. g = gensec.Security.start_server(auth_context=a) # and still the ldb is not dereferenced... @segfault_detector def test_auth_user_session(self): s = auth.user_session(ldb=42, principal='foo') @segfault_detector def test_gensec_start_server(self): gensec.Security.start_server(auth_context=42) @segfault_detector def test_netbios_query_name(self): n = netbios.Node() t = n.query_name((42, 'foo'), 'localhost') @segfault_detector def test_encrypt_netr_crypt_password(self): lp, creds, server = self.get_lp_et_al() creds.encrypt_netr_crypt_password(42) @segfault_detector def test_hive_open_ldb(self): # we don't need to provide a valid path because we segfault first try: registry.open_ldb('', credentials=42) except ldb.LdbError as e: print("failed with %s" % e) @segfault_detector def test_hive_open_hive(self): # we don't need to provide a valid path because we segfault first try: registry.open_hive('s', 's', 's', 's') except ldb.LdbError as e: print("failed with %s" % e) @segfault_detector def test_ldb_add_nameless_element(self): m = ldb.Message() e = ldb.MessageElement('q') try: m.add(e) except ldb.LdbError: pass str(m) @segfault_detector def test_ldb_register_module(self): ldb.register_module('') @segfault_detector def test_messaging_deregister(self): messaging.deregister('s', 's', 's', False) @segfault_detector def test_rpcecho(self): from samba.dcerpc import echo echo.rpcecho("") @segfault_detector def test_dcerpc_idl_ref_elements(self): """There are many pidl generated functions that crashed on this pattern, where a NULL pointer was created rather than an empty structure.""" samr.Connect5().out_info_out = 1 @segfault_detector def test_dcerpc_idl_unixinfo_elements(self): """Dereferencing is sufficient to crash""" unixinfo.GetPWUid().out_infos @segfault_detector def test_dcerpc_idl_inline_arrays(self): """Inline arrays were incorrectly handled.""" dnsserver.DNS_RPC_SERVER_INFO_DOTNET().pExtensions @segfault_detector def test_dcerpc_idl_set_inline_arrays(self): """Setting an inline array was incorrectly handled.""" a = dnsserver.DNS_EXTENSION(); x = dnsserver.DNS_RPC_DP_INFO(); x.pwszReserved = [a, a, a] @no_gdb_backtrace @segfault_detector def test_dnsp_string_list(self): from samba.dcerpc import dnsp # We segfault if s.count is greater than the length of s.str s = dnsp.string_list() s.count = 3 s.str @no_gdb_backtrace @segfault_detector def test_dns_record(self): from samba.dnsserver import TXTRecord from samba.dcerpc import dnsp, dnsserver # there are many others here rec = TXTRecord(["a", "b", "c"]) rec.wType = dnsp.DNS_TYPE_A rec.data @no_gdb_backtrace @segfault_detector def test_ldb_msg_diff(self): samdb = self.get_samdb() msg = ldb.Message() msg.dn = ldb.Dn(samdb, '') diff = samdb.msg_diff(msg, msg) del msg diff.dn @no_gdb_backtrace @segfault_detector def test_ldb_msg_del_dn(self): msg = ldb.Message() del msg.dn @no_gdb_backtrace @segfault_detector def test_ldb_control_del_critical(self): samdb = self.get_samdb() c = ldb.Control(samdb, 'relax:1') del c.critical @segfault_detector def test_random_bytes(self): # memory error from SIZE_MAX -1 allocation. from samba import generate_random_bytes generate_random_bytes(-1)