--- zzzz-none-000/linux-3.10.107/net/ax25/ax25_subr.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/ax25/ax25_subr.c	2021-02-04 17:41:59.000000000 +0000
@@ -264,6 +264,8 @@
 {
 	ax25_clear_queues(ax25);
 
+	if (!ax25->sk || !sock_flag(ax25->sk, SOCK_DESTROY))
+		ax25_stop_heartbeat(ax25);
 	ax25_stop_t1timer(ax25);
 	ax25_stop_t2timer(ax25);
 	ax25_stop_t3timer(ax25);