[PATCH] gpio: fix a potential NULL pointer dereference

[Andrew Jeffery]

On Mon, 25 Mar 2019, at 09:40, Kangjie Lu wrote:
> In case devm_kzalloc, the patch returns ENOMEM to avoid potential
> NULL pointer dereference.
> 
> Signed-off-by: Kangjie Lu <kjlu at umn.edu>

Reviewed-by: Andrew Jeffery <andrew at aj.id.au>

> ---
>  drivers/gpio/gpio-aspeed.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
> index 854bce4fb9e7..217507002dbc 100644
> --- a/drivers/gpio/gpio-aspeed.c
> +++ b/drivers/gpio/gpio-aspeed.c
> @@ -1224,6 +1224,8 @@ static int __init aspeed_gpio_probe(struct 
> platform_device *pdev)
>  
>  	gpio->offset_timer =
>  		devm_kzalloc(&pdev->dev, gpio->chip.ngpio, GFP_KERNEL);
> +	if (!gpio->offset_timer)
> +		return -ENOMEM;
>  
>  	return aspeed_gpio_setup_irqs(gpio, pdev);
>  }
> -- 
> 2.17.1
> 
>