diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 2aeee648c080..13c3153b40d6 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -1478,7 +1478,11 @@ static void *pppol2tp_seq_start(struct seq_file *m, loff_t *offs)
 	if (!pos)
 		goto out;
 
-	BUG_ON(!m->private);
+	if (WARN_ON(!m->private)) {
+		pd = NULL;
+		goto out;
+	}
+
 	pd = m->private;
 	net = seq_file_net(m);