static int cx24116_readreg(struct cx24116_state *state, u8 reg)
{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = {
		{ .addr = state->config->demod_address, .flags = 0,
			.buf = b0, .len = 1 },
		{ .addr = state->config->demod_address, .flags = I2C_M_RD,
			.buf = b1, .len = 1 }
	};

	ret = i2c_transfer(state->i2c, msg, 2);

	if (ret != 2) {
		printk(KERN_ERR "%s: reg=0x%x (error=%d)\n",
			__func__, reg, ret);
		return ret;
	}

	if (debug > 1)
		printk(KERN_INFO "cx24116: read reg 0x%02x, value 0x%02x\n",
			reg, b1[0]);

	return b1[0];
}

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.