source3 smbd: tests for null pointer dereference

Test case to replicate null pointer dereference in smbd, introduced in
the auth logging changes.

Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/python/samba/tests/net_join_no_spnego.py b/python/samba/tests/net_join_no_spnego.py
new file mode 100644
index 00000000000..4da9c2e3729
--- /dev/null
+++ b/python/samba/tests/net_join_no_spnego.py
@@ -0,0 +1,59 @@
+# 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 <http://www.gnu.org/licenses/>.
+#
+
+"""
+Detect null pointer exception in /source3/smbd/sessetup.c
+"""
+
+import samba.tests
+import os
+from samba.net import Net, LIBNET_JOIN_AUTOMATIC
+from samba.credentials import DONT_USE_KERBEROS
+from samba import NTSTATUSError, ntstatus
+import ctypes
+
+class NetJoinNoSpnegoTests(samba.tests.TestCase):
+
+    def setUp(self):
+        super(NetJoinNoSpnegoTests, self).setUp()
+        self.remoteAddress = "/root/ncalrpc_as_system"
+        self.domain = os.environ["DOMAIN"]
+        self.server = os.environ["SERVER"]
+
+    def tearDown(self):
+        super(NetJoinNoSpnegoTests, self).tearDown()
+
+    def test_net_join_no_spnego(self):
+        lp = self.get_loadparm()
+        lp.set("client use spnego", "no")
+        netbios_name = "NetJoinNoSpnego"
+        machinepass  = "abcdefghij"
+        creds = self.insta_creds(template=self.get_credentials(),
+                                 kerberos_state=DONT_USE_KERBEROS)
+
+        net = Net(creds, lp, server=self.server)
+
+        try:
+            (join_password, sid, domain_name) = net.join_member(
+                self.domain, netbios_name, LIBNET_JOIN_AUTOMATIC,
+                machinepass=machinepass)
+        except NTSTATUSError as e:
+            code = ctypes.c_uint32(e[0]).value
+            if code == ntstatus.NT_STATUS_CONNECTION_DISCONNECTED:
+                self.fail("Connection failure")
+        pass