diff options
Diffstat (limited to 'drivers/acpi/acpica/rscalc.c')
| -rw-r--r-- | drivers/acpi/acpica/rscalc.c | 51 |
1 files changed, 41 insertions, 10 deletions
diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c index 90583db459a2..6e7a152d6459 100644 --- a/drivers/acpi/acpica/rscalc.c +++ b/drivers/acpi/acpica/rscalc.c @@ -320,6 +320,16 @@ acpi_rs_get_aml_length(struct acpi_resource *resource, break; + case ACPI_RESOURCE_TYPE_CLOCK_INPUT: + + total_size = (acpi_rs_length)(total_size + + resource->data. + clock_input. + resource_source. + string_length); + + break; + case ACPI_RESOURCE_TYPE_SERIAL_BUS: total_size = @@ -596,15 +606,23 @@ acpi_rs_get_list_length(u8 *aml_buffer, } break; - case ACPI_RESOURCE_NAME_SERIAL_BUS: + case ACPI_RESOURCE_NAME_SERIAL_BUS:{ - minimum_aml_resource_length = - acpi_gbl_resource_aml_serial_bus_sizes - [aml_resource->common_serial_bus.type]; - extra_struct_bytes += - aml_resource->common_serial_bus.resource_length - - minimum_aml_resource_length; - break; + /* Avoid undefined behavior: member access within misaligned address */ + + struct aml_resource_common_serialbus + common_serial_bus; + memcpy(&common_serial_bus, aml_resource, + sizeof(common_serial_bus)); + + minimum_aml_resource_length = + acpi_gbl_resource_aml_serial_bus_sizes + [common_serial_bus.type]; + extra_struct_bytes += + common_serial_bus.resource_length - + minimum_aml_resource_length; + break; + } case ACPI_RESOURCE_NAME_PIN_CONFIG: @@ -650,6 +668,13 @@ acpi_rs_get_list_length(u8 *aml_buffer, break; + case ACPI_RESOURCE_NAME_CLOCK_INPUT: + extra_struct_bytes = + acpi_rs_stream_option_length(resource_length, + minimum_aml_resource_length); + + break; + default: break; @@ -663,10 +688,16 @@ acpi_rs_get_list_length(u8 *aml_buffer, */ if (acpi_ut_get_resource_type(aml_buffer) == ACPI_RESOURCE_NAME_SERIAL_BUS) { + + /* Avoid undefined behavior: member access within misaligned address */ + + struct aml_resource_common_serialbus common_serial_bus; + memcpy(&common_serial_bus, aml_resource, + sizeof(common_serial_bus)); + buffer_size = acpi_gbl_resource_struct_serial_bus_sizes - [aml_resource->common_serial_bus.type] + - extra_struct_bytes; + [common_serial_bus.type] + extra_struct_bytes; } else { buffer_size = acpi_gbl_resource_struct_sizes[resource_index] + |