Re: [PATCH] NFC: NULL out the dev->rfkill to prevent UAF

[Krzysztof Kozlowski]

On 12/04/2022 07:32, Lin Ma wrote:
> Commit 3e3b5dfcd16a ("NFC: reorder the logic in nfc_{un,}register_device") 
> assumes the device_is_registered() in function nfc_dev_up() will help
> to check when the rfkill is unregistered. However, this check only 
> take effect when device_del(&dev->dev) is done in nfc_unregister_device().
> Hence, the rfkill object is still possible be dereferenced.
> 


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>


Best regards,
Krzysztof