--- zzzz-none-000/linux-5.4.213/fs/notify/group.c	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/fs/notify/group.c	2024-05-29 11:20:02.000000000 +0000
@@ -25,6 +25,7 @@
 		group->ops->free_group_priv(group);
 
 	mem_cgroup_put(group->memcg);
+	mutex_destroy(&group->mark_mutex);
 
 	kfree(group);
 }