netdev - Re: [RFC 2/5] VSOCK: Introduce virtio-vsock-common.ko

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Message-ID: <20130629234550.GC11388@hj.localdomain>
Date:	Sun, 30 Jun 2013 07:45:50 +0800
From:	Asias He <asias@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, kvm@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, acking@...are.com,
	dtor@...are.com, grantr@...are.com, rusty@...tcorp.com.au,
	mst@...hat.com, jasowang@...hat.com, stefanha@...il.com,
	kraxel@...hat.com, penberg@...nel.org, sasha.levin@...cle.com
Subject: Re: [RFC 2/5] VSOCK: Introduce virtio-vsock-common.ko

Hi David,

On Fri, Jun 28, 2013 at 09:32:25PM -0700, David Miller wrote:
> From: Asias He <asias@...hat.com>
> Date: Thu, 27 Jun 2013 16:00:01 +0800
> 
> > +static void
> > +virtio_transport_recv_dgram(struct sock *sk,
> > +			    struct virtio_vsock_pkt *pkt)
>  ...
> > +	memcpy(skb->data, pkt, sizeof(*pkt));
> > +	memcpy(skb->data + sizeof(*pkt), pkt->buf, pkt->len);
> 
> Are you sure this is right?
> 
> Shouldn't you be using "sizeof(struct virtio_vsock_hdr)" instead of
> "sizeof(*pkt)".  'pkt' is "struct virtio_vsock_pkt" and has all kinds
> of meta-data you probably don't mean to include in the SKB.

Right, virtio_vsock_hdr is enough. Will fix this.

Thanks for looking at this. 

-- 
Asias
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