Re: [PATCH 2/3] hwmon: lenovo-ec-sensors: Fix NULL pointer dereference when DMI match fails

[Guenter Roeck]

On 5/13/26 18:14, Kean wrote:
> dmi_first_match() returns NULL if the running system does not match any
> entry in thinkstation_dmi_table. Without a NULL check, the subsequent
> dmi_id->driver_data access dereferences a NULL pointer, causing a kernel
> oops or panic.
>
> Add a NULL check and return -ENODEV to gracefully fail the probe when
> the driver is loaded on an unsupported platform.

How would that happen in practice ? The driver init code has

        if (!dmi_check_system(thinkstation_dmi_table))
                return -ENODEV;

Please provide a reproducer.

Thanks,
Guenter