diff --git a/kernel/notifier.c b/kernel/notifier.c
index 823be115..143fdd7 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -21,6 +21,10 @@
 static int notifier_chain_register(struct notifier_block **nl,
 		struct notifier_block *n)
 {
+	if (!kernel_text_address((unsigned long)n->notifier_call)) {
+		WARN(1, "Invalid notifier registered!");
+		return 0;
+	}
 	while ((*nl) != NULL) {
 		if (n->priority > (*nl)->priority)
 			break;
@@ -34,6 +38,10 @@
 static int notifier_chain_cond_register(struct notifier_block **nl,
 		struct notifier_block *n)
 {
+	if (!kernel_text_address((unsigned long)n->notifier_call)) {
+		WARN(1, "Invalid notifier registered!");
+		return 0;
+	}
 	while ((*nl) != NULL) {
 		if ((*nl) == n)
 			return 0;
@@ -82,6 +90,14 @@
 
 	while (nb && nr_to_call) {
 		next_nb = rcu_dereference(nb->next);
+
+#ifdef CONFIG_DEBUG_NOTIFIERS
+		if (!kernel_text_address((unsigned long)nb->notifier_call)) {
+			WARN(1, "Invalid notifier called!");
+			nb = next_nb;
+			continue;
+		}
+#endif
 		ret = nb->notifier_call(nb, val, v);
 
 		if (nr_calls)