auth/credentials: Fix NULL dereference

We should not pass a NULL pointer to netlogon_creds_session_encrypt().

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/auth/credentials/pycredentials.c b/auth/credentials/pycredentials.c
index 41a9d597435..ac9ccd4ae27 100644
--- a/auth/credentials/pycredentials.c
+++ b/auth/credentials/pycredentials.c
@@ -1033,6 +1033,11 @@ static PyObject *py_creds_encrypt_samr_password(PyObject *self,
 		return NULL;
 	}
 
+	if (creds->netlogon_creds == NULL) {
+		PyErr_Format(PyExc_ValueError, "NetLogon credentials not set");
+		return NULL;
+	}
+
 	if (!PyArg_ParseTuple(args, "O", &py_cp)) {
 		return NULL;
 	}