diff --git a/[refs] b/[refs]
index 44d8c26a7091..c69ee36d4fa8 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 092e1fdaf35126475aef0dc70f4a2ce4f2f43052
+refs/heads/master: f1dad166e88a5ddca0acf8f11dea0e2bd92d8bf3
diff --git a/trunk/kernel/sysctl.c b/trunk/kernel/sysctl.c
index 0deed82a6156..8ac51714b08c 100644
--- a/trunk/kernel/sysctl.c
+++ b/trunk/kernel/sysctl.c
@@ -1588,6 +1588,10 @@ struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
 void unregister_sysctl_table(struct ctl_table_header * header)
 {
 	might_sleep();
+
+	if (header == NULL)
+		return;
+
 	spin_lock(&sysctl_lock);
 	start_unregistering(header);
 	spin_unlock(&sysctl_lock);