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Message-Id: <20070308.143804.21927824.davem@davemloft.net>
Date:	Thu, 08 Mar 2007 14:38:04 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	chrisw@...s-sol.org
Cc:	yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: Re: IPV6: make ipv6_getsockopt_sticky honor user's buffer size

From: Chris Wright <chrisw@...s-sol.org>
Date: Wed, 7 Mar 2007 23:10:48 -0800

> Make sure not to copy_to_user more than user's buffer can handle (we
> already checked the min, just use it) in ipv6_getsockopt_sticky.  And
> while there, minor whitespace cleanup now that ipv6_getsockopt_sticky
> call can nicely fit on one line.
> 
> Signed-off-by: Chris Wright <chrisw@...s-sol.org>

I wonder about this :-)

This gives the user now way to figure out that ipv6_optlen(hdr) is
larger than the len they supplied.

In other situations usually we validate the length and return -EINVAL
if it is too small.

That might be the thing to do in this case too.
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