1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0deed82a6156..8ac51714b08c 100644
--- a/kernel/sysctl.c
+++ b/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);