Merge branch 'hugepage-fallbacks' (hugepatch patches from David Rientjes)

[linux.git] / drivers / acpi / tables.c

diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index b323277593809269aaf4af8e7c8da3850be08011..180ac432976316f1193f65ac071d557fae911487 100644 (file)
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -20,6 +20,7 @@
 #include <linux/memblock.h>
 #include <linux/earlycpio.h>
 #include <linux/initrd.h>
+#include <linux/security.h>
 #include "internal.h"
 
 #ifdef CONFIG_ACPI_CUSTOM_DSDT
@@ -578,6 +579,11 @@ void __init acpi_table_upgrade(void)
        if (table_nr == 0)
                return;
 
+       if (security_locked_down(LOCKDOWN_ACPI_TABLES)) {
+               pr_notice("kernel is locked down, ignoring table override\n");
+               return;
+       }
+
        acpi_tables_addr =
                memblock_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS,
                                       all_tables_size, PAGE_SIZE);