linux-kernel - Re: [PATCH 0/10] af_unix: add multicast and filtering features to AF

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Message-ID: <20120228142846.GD187520@jupiter.n2.diac24.net>
Date:	Tue, 28 Feb 2012 15:28:46 +0100
From:	David Lamparter <equinox@...c24.net>
To:	Rodrigo Moya <rodrigo.moya@...labora.co.uk>
Cc:	David Miller <davem@...emloft.net>,
	javier.martinez@...labora.co.uk, javier@...labora.co.uk,
	eric.dumazet@...il.com, lennart@...ttering.net,
	kay.sievers@...y.org, alban.crequy@...labora.co.uk,
	bart.cerneels@...labora.co.uk, sjoerd.simons@...labora.co.uk,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/10] af_unix: add multicast and filtering features to
 AF_UNIX

On Tue, Feb 28, 2012 at 11:47:39AM +0100, Rodrigo Moya wrote:
> > - slow readers: dropping packets vs blocking the sender. Although
> >   datagrams are not reliable on IP, datagrams on Unix sockets are
> never
> >   lost. So if one receiver has its buffer full the sender is blocked
> > instead of dropping packets. That way we guarantee a reliable
> > communication channel.

This sounds like a terribly nice way to f*ck the entire D-Bus system by
having one broken (or malicious) desktop application. What's the
intended way of coping with users that block the socket by not reading?


-David L.
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