Re: [PATCH v2 2/3] firmware/edd: use kobject_put() on edd_device_register() failure

[Sourabh Jain <sourabhjain@linux.ibm.com>]

On 13/08/26 15:24, Tarun Sahu wrote:
> When edd_device_register() fails after initializing the kobject with
> kobject_init_and_add(), calling kfree(edev) directly bypasses the
> kobject release callback (edd_release) and leaks the allocated kobject
> resources.
>
> Fix this by replacing direct kfree(edev) with kobject_put(&edev->kobj) on
> registration failure.
>
> Signed-off-by: Tarun Sahu <tarunsahu@google.com>
> ---
>   drivers/firmware/edd.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/edd.c b/drivers/firmware/edd.c
> index f980c5b56858..763e7b16d517 100644
> --- a/drivers/firmware/edd.c
> +++ b/drivers/firmware/edd.c
> @@ -748,7 +748,7 @@ edd_init(void)
>   
>   		rc = edd_device_register(edev, i);
>   		if (rc) {
> -			kfree(edev);
> +			kobject_put(&edev->kobj);

The EDD device is registered with a ktype that has a release function, 
so it is
better to call kobject_put() to release edev instead of freeing the 
memory manually.

Changes look good to me. Feel free to add:
Reviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com>


>   			goto out;
>   		}
>   		edd_devices[i] = edev;