guard against crash

1 files changed, 7 insertions, 0 deletions

diff --git a/src/server/QXmppIncomingClient.cpp b/src/server/QXmppIncomingClient.cpp
index 1b22ac3c..fd6fce18 100644
--- a/src/server/QXmppIncomingClient.cpp
+++ b/src/server/QXmppIncomingClient.cpp
@@ -273,6 +273,13 @@ void QXmppIncomingClient::handleStanza(const QDomElement &nodeRecv)
             QXmppSaslResponse response;
             response.parse(nodeRecv);
 
+            if (!d->saslServer) {
+                warning("SASL response received, but no mechanism selected");
+                sendPacket(QXmppSaslFailure());
+                disconnectFromHost();
+                return;
+            }
+
             QByteArray challenge;
             QXmppSaslServer::Response result = d->saslServer->respond(response.value(), challenge);
             if (result == QXmppSaslServer::InputNeeded) {