[PATCH] i3c: master: Fix info leak and UAF in device unregister path

[Alexandre Belloni]

On Thu, 23 Jul 2026 10:57:47 +0300, Adrian Hunter wrote:
> i3c_master_unregister_i3c_devs() clears i3cdev->dev->desc before
> calling device_unregister().  During device_unregister(),
> device_del() emits a KOBJ_REMOVE uevent and unbinds the driver while
> the device descriptor is still expected to be valid.  As a result,
> i3c_device_uevent() and a racing modalias_show() can observe a NULL
> desc and fall back to an uninitialized stack struct i3c_device_info,
> leaking kernel stack contents in the generated modalias.  Driver
> .remove() callbacks may also encounter an unexpected NULL desc during
> unbind.
> 
> [...]

Applied, thanks!

[1/1] i3c: master: Fix info leak and UAF in device unregister path
      https://git.kernel.org/i3c/c/6f056a769b9f

Best regards,

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com