linux-kernel - Re: [ 105/124] af_unix: dont send SCM_CREDENTIAL when dest socket is NULL

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Message-ID: <1364997630.13853.19.camel@edumazet-glaptop>
Date:	Wed, 03 Apr 2013 07:00:30 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Sven Joachim <svenjoac@....de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Ding Tianhong <dingtianhong@...wei.com>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [ 105/124] af_unix: dont send SCM_CREDENTIAL when dest socket
 is NULL

On Wed, 2013-04-03 at 13:41 +0200, Sven Joachim wrote:
> On 2013-04-03 00:11 +0200, Greg Kroah-Hartman wrote:
> 
> > 3.8-stable review patch.  If anyone has any objections, please let me know.
> 
> I'm seeing several complaints from udevd at boot in both 3.8.6-rc1 and
> 3.9-rc5: "udevd[56]: sender uid=65534, message ignored".  Reverting the
> patch below on top of 3.8.6-rc1 fixes that.  I'm using udev version 175
> here, and 65534 is the uid of user "nobody".

And if you use a 3.1 kernel (before commit
16e5726269611b71c930054ffe9b858c1cea88eb) are you seeing this message ?

It might be a wrong sender (application bug or bad identity), and udevd
correctly discards the incoming message.



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