linux-kernel - Re: [PATCH] fix memory leak in virtio

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Date:	Mon, 10 Aug 2009 22:03:41 -0700
From:	Shirley Ma <mashirle@...ibm.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] fix memory leak in virtio_net

This is false report. I checked kfree_skb(), it does free all pages 
in the fraglist in skb_release_data() later.

Thanks
Shirley

On Mon, 2009-08-10 at 13:05 -0700, Shirley Ma wrote:
> Whild reading virtio code, I found some memory leak in removing
> virtio_net.
> 
> In virtnet_remove, only skb has been freed not the pages in skb
> frags. Here is the patch to fix this, please review it.
> 
> Signed-off-by: Shirley Ma <xma@...ibm.com>
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 2a6e81d..7e629d9 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -978,6 +978,7 @@ static void virtnet_remove(struct virtio_device *vdev)
> 
>  	/* Free our skbs in send and recv queues, if any. */
>  	while ((skb = __skb_dequeue(&vi->recv)) != NULL) {
> +		trim_pages(vi, skb);
>  		kfree_skb(skb);
>  		vi->num--;
>  	}
> 
> 
> 
> 

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