ACPICA: Add a table checksum verify for Load operator
Added a table checksum verification for the Load operator, in
the case where the load is from a buffer.
http://www.acpica.org/bugzilla/show_bug.cgi?id=578
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>
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c
index a0f34b4..dbf1e6f 100644
--- a/drivers/acpi/executer/exconfig.c
+++ b/drivers/acpi/executer/exconfig.c
@@ -275,6 +275,7 @@
struct acpi_table_desc table_desc;
acpi_native_uint table_index;
acpi_status status;
+ u32 length;
ACPI_FUNCTION_TRACE(ex_load_op);
@@ -322,18 +323,35 @@
"Load from Buffer or Field %p %s\n", obj_desc,
acpi_ut_get_object_type_name(obj_desc)));
+ length = obj_desc->buffer.length;
+
+ /* Must have at least an ACPI table header */
+
+ if (length < sizeof(struct acpi_table_header)) {
+ return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+ }
+
+ /* Validate checksum here. It won't get validated in tb_add_table */
+
+ status = acpi_tb_verify_checksum((struct acpi_table_header *)
+ obj_desc->buffer.pointer,
+ length);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
/*
* We need to copy the buffer since the original buffer could be
* changed or deleted in the future
*/
- table_desc.pointer = ACPI_ALLOCATE(obj_desc->buffer.length);
+ table_desc.pointer = ACPI_ALLOCATE(length);
if (!table_desc.pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer,
- obj_desc->buffer.length);
- table_desc.length = obj_desc->buffer.length;
+ length);
+ table_desc.length = length;
table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
break;