static void tsc2102_data_register_write(
                TSC210xState *s, int reg, uint16_t value)
{
    switch (reg) {
    case 0x00:	/* X */
    case 0x01:	/* Y */
    case 0x02:	/* Z1 */
    case 0x03:	/* Z2 */
    case 0x05:	/* BAT1 */
    case 0x06:	/* BAT2 */
    case 0x07:	/* AUX1 */
    case 0x08:	/* AUX2 */
    case 0x09:	/* TEMP1 */
    case 0x0a:	/* TEMP2 */
        return;

    default:
#ifdef TSC_VERBOSE
        fprintf(stderr, "tsc2102_data_register_write: "
                        "no such register: 0x%02x\n", reg);
#endif
    }
}

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.