diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 7860383295d8..566f3b7b957e 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -2725,8 +2725,12 @@ void ipv6_mc_down(struct inet6_dev *idev)
 	synchronize_net();
 	mld_query_stop_work(idev);
 	mld_report_stop_work(idev);
+
+	mutex_lock(&idev->mc_lock);
 	mld_ifc_stop_work(idev);
 	mld_gq_stop_work(idev);
+	mutex_unlock(&idev->mc_lock);
+
 	mld_dad_stop_work(idev);
 }