ACPICA: Add detection of corrupted/replaced DSDT

This change adds support to detect a DSDT that has been corrupted
and/or replaced from outside the OS (by firmware). This is
typically catastrophic for the system, but has been seen on
some machines.

https://bugzilla.kernel.org/show_bug.cgi?id=14679

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
index 6064dd4e94c2..67e7ad517051 100644
--- a/drivers/acpi/acpica/psxface.c
+++ b/drivers/acpi/acpica/psxface.c
@@ -220,6 +220,10 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
 
         ACPI_FUNCTION_TRACE(ps_execute_method);
 
+        /* Quick validation of DSDT header */
+
+        acpi_tb_check_dsdt_header();
+
         /* Validate the Info and method Node */
 
         if (!info || !info->resolved_node) {