netdev - Re: [PATCH v2] ipv6: fix inconsistent prefix route handling

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Message-ID: <20140216165128.GF8634@order.stressinduktion.org>
Date:	Sun, 16 Feb 2014 17:51:28 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Steven Barth <cyrus@...nwrt.org>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH v2] ipv6: fix inconsistent prefix route handling

On Sun, Feb 16, 2014 at 05:25:54PM +0100, Steven Barth wrote:
> -	if (ifp->flags & IFA_F_PERMANENT && !(ifp->flags & IFA_F_NOPREFIXROUTE))
> +	if (!(ifp->flags & IFA_F_NOPREFIXROUTE))
>  		action = check_cleanup_prefix_route(ifp, &expires);

This could too easily clean up valid on-link information if the address just
happens to be in the same subnet. Would (ifp-flags &
(IFA_F_PERMANENET|IFA_F_TEMPORARY) && !(...)) solve the problem, too?

Greetings,

  Hannes
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