RE: [PATCH] net: dsa: loop: Check for memory allocation failure

[David Laight]

From: Christophe JAILLET
> Sent: 06 May 2017 06:30
> If 'devm_kzalloc' fails, a NULL pointer will be dereferenced.
> Return -ENOMEM instead, as done for some other memory allocation just a
> few lines above.
...
> --- a/drivers/net/dsa/dsa_loop.c
> +++ b/drivers/net/dsa/dsa_loop.c
> @@ -256,6 +256,9 @@ static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
>  		return -ENOMEM;
> 
>  	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
> +	if (!ps)
> +		return -ENOMEM;
> +
>  	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
>  	if (!ps->netdev)
>  		return -EPROBE_DEFER;

On the face if it this code leaks like a sieve.

	David