CVE-2023-53834

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

iio: adc: ina2xx: avoid NULL pointer dereference on OF device match

The affected lines were resulting in a NULL pointer dereference on our

platform because the device tree contained the following list of

compatible strings:

power-sensor@40 {

compatible = "ti,ina232", "ti,ina231";

...

};

Since the driver doesn't declare a compatible string "ti,ina232", the OF

matching succeeds on "ti,ina231". But the I2C device ID info is

populated via the first compatible string, cf. modalias population in

of_i2c_get_board_info(). Since there is no "ina232" entry in the legacy

I2C device ID table either, the struct i2c_device_id *id pointer in the

probe function is NULL.

Fix this by using the already populated type variable instead, which

points to the proper driver data. Since the name is also wanted, add a

generic one to the ina2xx_config table.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References