[PATCH 4/4] um: virtio_uml: fix memory leak on init failures

[Anton Ivanov]

On 25/06/2021 09:34, Johannes Berg wrote:
> From: Johannes Berg <johannes.berg at intel.com>
> 
> If initialization fails, e.g. because the connection failed,
> we leak the 'vu_dev'. Fix that. Reported by smatch.
> 
> Fixes: 5d38f324993f ("um: drivers: Add virtio vhost-user driver")
> Signed-off-by: Johannes Berg <johannes.berg at intel.com>
> ---
>   arch/um/drivers/virtio_uml.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
> index cb79fe33d84e..d51e445df797 100644
> --- a/arch/um/drivers/virtio_uml.c
> +++ b/arch/um/drivers/virtio_uml.c
> @@ -1140,7 +1140,7 @@ static int virtio_uml_probe(struct platform_device *pdev)
>   		rc = os_connect_socket(pdata->socket_path);
>   	} while (rc == -EINTR);
>   	if (rc < 0)
> -		return rc;
> +		goto error_free;
>   	vu_dev->sock = rc;
>   
>   	spin_lock_init(&vu_dev->sock_lock);
> @@ -1161,6 +1161,8 @@ static int virtio_uml_probe(struct platform_device *pdev)
>   
>   error_init:
>   	os_close_file(vu_dev->sock);
> +error_free:
> +	kfree(vu_dev);
>   	return rc;
>   }
>   
> 

Acked-By: Anton Ivanov <anton.ivanov at cambridgegreys.com>

-- 
Anton R. Ivanov
https://www.kot-begemot.co.uk/