1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
index b2ef4c2ec955..7031307becd7 100644
--- a/drivers/acpi/custom_method.c
+++ b/drivers/acpi/custom_method.c
@@ -9,6 +9,7 @@
 #include <linux/uaccess.h>
 #include <linux/debugfs.h>
 #include <linux/acpi.h>
+#include <linux/security.h>
 
 #include "internal.h"
 
@@ -29,6 +30,11 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
 
         struct acpi_table_header table;
         acpi_status status;
+        int ret;
+
+        ret = security_locked_down(LOCKDOWN_ACPI_TABLES);
+        if (ret)
+                return ret;
 
         if (!(*ppos)) {
                 /* parse the table header to get the table length */