ACPICA: Add error checks to prevent faults

Added additional error checking to prevent run-time faults.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 16 insertions, 2 deletions

diff --git a/drivers/acpi/executer/exstore.c b/drivers/acpi/executer/exstore.c
index 912889ed45ed..d860f9c6172c 100644
--- a/drivers/acpi/executer/exstore.c
+++ b/drivers/acpi/executer/exstore.c
@@ -209,8 +209,16 @@ acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
                                                         object, level + 4, 0);
                         }
                 } else if (source_desc->reference.node) {
-                        acpi_ex_do_debug_object((source_desc->reference.node)->
-                                                object, level + 4, 0);
+                        if (ACPI_GET_DESCRIPTOR_TYPE
+                            (source_desc->reference.node) !=
+                            ACPI_DESC_TYPE_NAMED) {
+                                ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
+                                                      " %p - Not a valid namespace node\n"));
+                        } else {
+                                acpi_ex_do_debug_object((source_desc->reference.
+                                                         node)->object,
+                                                        level + 4, 0);
+                        }
                 }
                 break;
 
diff --git a/drivers/acpi/namespace/nsnames.c b/drivers/acpi/namespace/nsnames.c
index cbd94af08cc5..e14a1412656b 100644
--- a/drivers/acpi/namespace/nsnames.c
+++ b/drivers/acpi/namespace/nsnames.c
@@ -180,6 +180,12 @@ acpi_size acpi_ns_get_pathname_length(struct acpi_namespace_node *node)
         next_node = node;
 
         while (next_node && (next_node != acpi_gbl_root_node)) {
+                if (ACPI_GET_DESCRIPTOR_TYPE(next_node) != ACPI_DESC_TYPE_NAMED) {
+                        ACPI_ERROR((AE_INFO,
+                                    "Invalid NS Node (%X) while traversing path",
+                                    next_node));
+                        return 0;
+                }
                 size += ACPI_PATH_SEGMENT_LENGTH;
                 next_node = acpi_ns_get_parent_node(next_node);
         }