diff --git a/kernel/fork.c b/kernel/fork.c
index 3fc3c13..163325a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -107,6 +107,7 @@
 
 void free_task(struct task_struct *tsk)
 {
+	prop_local_destroy_single(&tsk->dirties);
 	free_thread_info(tsk->stack);
 	rt_mutex_debug_task_free(tsk);
 	free_task_struct(tsk);
@@ -163,6 +164,7 @@
 {
 	struct task_struct *tsk;
 	struct thread_info *ti;
+	int err;
 
 	prepare_to_copy(orig);
 
@@ -178,6 +180,14 @@
 
 	*tsk = *orig;
 	tsk->stack = ti;
+
+	err = prop_local_init_single(&tsk->dirties);
+	if (err) {
+		free_thread_info(ti);
+		free_task_struct(tsk);
+		return NULL;
+	}
+
 	setup_thread_stack(tsk, orig);
 
 #ifdef CONFIG_CC_STACKPROTECTOR