netdev - Re: 2.6.19/2.6.20 BUG in inet_rtm_newaddr()/__inet_insert

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Message-Id: <20070309.134358.52132045.davem@davemloft.net>
Date:	Fri, 09 Mar 2007 13:43:58 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	johnpol@....mipt.ru
Cc:	frankvm@...nkvm.com, netdev@...r.kernel.org
Subject: Re: 2.6.19/2.6.20 BUG in inet_rtm_newaddr()/__inet_insert_ifa()

From: Evgeniy Polyakov <johnpol@....mipt.ru>
Date: Fri, 9 Mar 2007 15:30:17 +0300

> On Fri, Mar 09, 2007 at 11:33:33AM +0100, Frank van Maarseveen (frankvm@...nkvm.com) wrote:
> > Try this:
> > 
> > ip addr add 172.18.12.99/21 dev dummy0
> > ip addr add broadcast 172.18.15.255 dev dummy0
> 
> Attached patch fixes the problem.
> 
> nlmsg_parse() in rtm_to_ifaddr() sucessfully returns zero, but
> subsequent check for prefix len and LOCAL ifa fails, so NULL is returned
> instead of negative error value embedded in the pointer which is
> expected by error logic in inet_rtm_newaddr().

Patch applied, thanks Evgeniy.
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