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

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Message-ID: <87a9pfzm33.fsf@turtle.gmx.de>
Date:	Wed, 03 Apr 2013 17:10:40 +0200
From:	Sven Joachim <svenjoac@....de>
To:	Eric Dumazet <eric.dumazet@...il.com>
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 2013-04-03 16:00 +0200, Eric Dumazet wrote:

> 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 ?

No (tested with 3.1.10).

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

How would I find out the culprit?

Cheers,
       Sven
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