X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=kernel%2Fnotifier.c;h=61d5aa5eced3466393582e4f566b63c468ea7cc3;hb=412145947adfca60a4b5b4893fbae82dffa25edd;hp=4282c0a40a57ada651b86c7dcce2389abf489448;hpb=ae20a6afec1cf21919d97303f2d8b737eac5acc7;p=~andy%2Flinux

diff --git a/kernel/notifier.c b/kernel/notifier.c
index 4282c0a40a5..61d5aa5eced 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -82,6 +82,14 @@ static int __kprobes notifier_call_chain(struct notifier_block **nl,
 
 	while (nb && nr_to_call) {
 		next_nb = rcu_dereference(nb->next);
+
+#ifdef CONFIG_DEBUG_NOTIFIERS
+		if (unlikely(!func_ptr_is_kernel_text(nb->notifier_call))) {
+			WARN(1, "Invalid notifier called!");
+			nb = next_nb;
+			continue;
+		}
+#endif
 		ret = nb->notifier_call(nb, val, v);
 
 		if (nr_calls)