radeon_atombios_get_tv_info(struct radeon_device *rdev)
{
	struct radeon_mode_info *mode_info = &rdev->mode_info;
	int index = GetIndexIntoMasterTable(DATA, AnalogTV_Info);
	uint16_t data_offset;
	uint8_t frev, crev;
	struct _ATOM_ANALOG_TV_INFO *tv_info;
	enum radeon_tv_std tv_std = TV_STD_NTSC;

	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
				   &frev, &crev, &data_offset)) {

		tv_info = (struct _ATOM_ANALOG_TV_INFO *)
			(mode_info->atom_context->bios + data_offset);

		switch (tv_info->ucTV_BootUpDefaultStandard) {
		case ATOM_TV_NTSC:
			tv_std = TV_STD_NTSC;
			DRM_INFO("Default TV standard: NTSC\n");
			break;
		case ATOM_TV_NTSCJ:
			tv_std = TV_STD_NTSC_J;
			DRM_INFO("Default TV standard: NTSC-J\n");
			break;
		case ATOM_TV_PAL:
			tv_std = TV_STD_PAL;
			DRM_INFO("Default TV standard: PAL\n");
			break;
		case ATOM_TV_PALM:
			tv_std = TV_STD_PAL_M;
			DRM_INFO("Default TV standard: PAL-M\n");
			break;
		case ATOM_TV_PALN:
			tv_std = TV_STD_PAL_N;
			DRM_INFO("Default TV standard: PAL-N\n");
			break;
		case ATOM_TV_PALCN:
			tv_std = TV_STD_PAL_CN;
			DRM_INFO("Default TV standard: PAL-CN\n");
			break;
		case ATOM_TV_PAL60:
			tv_std = TV_STD_PAL_60;
			DRM_INFO("Default TV standard: PAL-60\n");
			break;
		case ATOM_TV_SECAM:
			tv_std = TV_STD_SECAM;
			DRM_INFO("Default TV standard: SECAM\n");
			break;
		default:
			tv_std = TV_STD_NTSC;
			DRM_INFO("Unknown TV standard; defaulting to NTSC\n");
			break;
		}
	}
	return tv_std;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.