[dpdk-dev] [PATCH] net/virtio: fix memory leak in dev close

[Xia, Chenbo]

Hi Gaoxiang,

> -----Original Message-----
> From: Gaoxiang Liu <clgx0086 at 163.com>
> Sent: Sunday, July 25, 2021 10:03 AM
> To: Maxime Coquelin <maxime.coquelin at redhat.com>; Xia, Chenbo
> <chenbo.xia at intel.com>
> Cc: dev at dpdk.org; liugaoxiang at huawei.com; Gaoxiang Liu <clgx0086 at 163.com>
> Subject: [PATCH] net/virtio: fix memory leak in dev close

I suggest the title: fix memory leak of interrupt handle

> 
> Free the "intr_handle" memory in virtio_user_dev_uninit() to
> avoid memory leak.
> when virtio user dev closes, the "intr_handle" memory is not freeed
> that is alloced in virtio_user_fill_intr_handle().

I suggest to replace 'intr_handle memory' with 'memory of interrupt handle'

freeed -> freed

alloced -> allocated

> 
> Fixes: 7f468b2ebfad ("net/virtio: release port upon close")

Please add cc stable tag under fixes line:
Cc: stable at dpdk.org

And I think the fix commit id is not correct. Fix commit id should be the
first commit that introduces the bug. I think it's:

3d4fb6fd2505 ("net/virtio-user: support Rx interrupt")

Please help me double confirm.

> 
> Signed-off-by: Gaoxiang Liu <liugaoxiang at huawei.com>

I suggest to send patch using this email too.

The patch content looks good to me.
Thanks,
Chenbo

> ---
>  drivers/net/virtio/virtio_user/virtio_user_dev.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> index 1cd1e95f4..16c58710d 100644
> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
> @@ -654,6 +654,13 @@ virtio_user_dev_init(struct virtio_user_dev *dev,
> char *path, int queues,
>  void
>  virtio_user_dev_uninit(struct virtio_user_dev *dev)
>  {
> +	struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->hw.port_id];
> +
> +	if (eth_dev->intr_handle) {
> +		free(eth_dev->intr_handle);
> +		eth_dev->intr_handle = NULL;
> +	}
> +
>  	virtio_user_stop_device(dev);
> 
>  	rte_mem_event_callback_unregister(VIRTIO_USER_MEM_EVENT_CLB_NAME,
> dev);
> --
> 2.32.0