Re: [PATCH 0/9] HID: iio: Fix race condition between callback registration and device exposure

[Andy Shevchenko]

On Sat, Jun 06, 2026 at 05:07:09PM +0530, Sanjay Chitroda wrote:
> Hi all,
> 
> This series fixes a race condition in HID IIO drivers related to the
> ordering between callback registration and device exposure.
> 
> Currently, several HID IIO drivers register the IIO device (making it
> visible to userspace and other kernel consumers) before all required
> callbacks and resources are fully initialized, or rely on devm-based
> cleanup in a way that does not guarantee correct teardown ordering.
> This creates a window where the device can be accessed while it is
> not fully initialized or is being torn down, potentially leading NULL
> dereference or use-after-free.
> 
> To address this, the series ensures that:
>   - All required callbacks and resources are set up before the device
>     is registered with the IIO core
>   - Resource cleanup is performed explicitly where ordering matters
> 
> PS: This is prepratory series to convert all HID IIO driver to devm.

I haven't found anything problematic, but still would be nice if somebody can
reproduce the issue and test this fix. Code wise LGTM,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>

-- 
With Best Regards,
Andy Shevchenko