diff --git a/[refs] b/[refs]
index ceab2921edf7..8835c6b38a00 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 47361c87c504d89f1ba50b4230d56ef67792c258
+refs/heads/master: 57732560d1aa7d454d10e557f8959d19d1454174
diff --git a/trunk/net/tipc/bcast.c b/trunk/net/tipc/bcast.c
index 8eb87b11d100..7342abc2cfa1 100644
--- a/trunk/net/tipc/bcast.c
+++ b/trunk/net/tipc/bcast.c
@@ -340,8 +340,10 @@ static void bclink_send_nack(struct tipc_node *n_ptr)
 		msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
 		msg_set_bcast_tag(msg, tipc_own_tag);
 
+		spin_lock_bh(&bc_lock);
 		tipc_bearer_send(&bcbearer->bearer, buf, NULL);
 		bcl->stats.sent_nacks++;
+		spin_unlock_bh(&bc_lock);
 		buf_discard(buf);
 
 		/*