netdev - Re: [PATCH]IPv6:remove duplicate check of optlen when setsockopt with IPV6

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Date:	Wed, 14 Jan 2009 21:02:42 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	yanghy@...fujitsu.com, netdev@...r.kernel.org
Subject: Re: [PATCH]IPv6:remove duplicate check of optlen when setsockopt
 with IPV6_PKTINFO option

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Wed, 14 Jan 2009 15:48:56 +1100

> Yang Hongyang <yanghy@...fujitsu.com> wrote:
> >
> > If optval==NULL, what we should return?EINVAL or EFAULT?
> > If it is EINVAL,then we should check it .otherwise it's the job of 
> > copy_from_user
> 
> I think EFAULT is fine.  We return that elsewhere as well.

Actually, we return EINVAL just a few lines above this code
block for some other socket option cases when optval==NULL.

So for consistency I'm applying Yang's original patch to
net-next-2.6

Thanks.
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