Re: [v2] nbd:fix memory leak in nbd_get_socket()

[Mike Christie]

On 11/19/2019 12:09 AM, Sun Ke wrote:
> Before return NULL,put the sock first.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: cf1b2326b734 ("nbd: verify socket is supported during setup")
> Signed-off-by: Sun Ke <sunke32@xxxxxxxxxx>
> ---
> v2: add cc:stable tag
> ---
>  drivers/block/nbd.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
> index a94ee45..19e7599 100644
> --- a/drivers/block/nbd.c
> +++ b/drivers/block/nbd.c
> @@ -993,6 +993,7 @@ static struct socket *nbd_get_socket(struct nbd_device *nbd, unsigned long fd,
>  	if (sock->ops->shutdown == sock_no_shutdown) {
>  		dev_err(disk_to_dev(nbd->disk), "Unsupported socket: shutdown callout must be supported.\n");
>  		*err = -EINVAL;
> +		sockfd_put(sock);
>  		return NULL;
>  	}
>  
> 

Reviewed-by: Mike Christie <mchristi@xxxxxxxxxx>