Re: [PATCH v1] EDAC/altera: Fix SDMMC PortB OF node reference leak

[Dinh Nguyen]

Hi Yuho,

On 5/1/26 14:48, Yuho Choi wrote:
> of_find_compatible_node() returns a device node with its refcount
> incremented. altr_portb_setup() looks up the SDMMC ECC node but does
> not drop that reference on error paths or after successful setup.
>
> Route the exits after the lookup through a cleanup path that calls
> of_node_put() before returning.
>
> Fixes: 911049845d70 ("EDAC, altera: Add Arria10 SD-MMC EDAC support")
> Signed-off-by: Yuho Choi <dbgh9129@xxxxxxxxx>
> ---
>   drivers/edac/altera_edac.c | 14 ++++++++++----
>   1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
> index 4edd2088c2db..a2fb30a9b914 100644
> --- a/drivers/edac/altera_edac.c
> +++ b/drivers/edac/altera_edac.c
> @@ -1526,15 +1526,18 @@ static int altr_portb_setup(struct altr_edac_device_dev *device)
>   		edac_printk(KERN_ERR, EDAC_DEVICE,
>   			    "%s: Unable to allocate PortB EDAC device\n",
>   			    ecc_name);
> -		return -ENOMEM;
> +		rc = -ENOMEM;
> +		goto out_put_node;
>   	}
>   
>   	/* Initialize the PortB EDAC device structure from PortA structure */
>   	altdev = dci->pvt_info;
>   	*altdev = *device;
>   
> -	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL))
> -		return -ENOMEM;
> +	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL)) {
> +		rc = -ENOMEM;
> +		goto out_put_node;

I think this should goto err_release_group_1, otherwise the dci pointer 
is leaked.

Dinh