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

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Message-ID: <496D61FE.7080500@cn.fujitsu.com>
Date:	Wed, 14 Jan 2009 11:54:38 +0800
From:	Yang Hongyang <yanghy@...fujitsu.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH]IPv6:remove duplicate check of optlen when setsockopt
 with IPV6_PKTINFO option

Herbert Xu wrote:
> Yang Hongyang <yanghy@...fujitsu.com> wrote:
>> Actually the condition (optlen == 0) is included in (optlen < sizeof(struct in6_pktinfo)),
>> so we do not need to check it separately.
> 
> You don't need to check optval == NULL either since that's the
> job of copy_from_user.

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

> 
> Cheers,


-- 
Regards
Yang Hongyang
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