Strange SASL issue

[Sami Ketola]

> On 7 Sep 2017, at 16.03, Antoine Nguyen <ngu.antoine at gmail.com> wrote:
> 
> 2017-09-07 14:29 GMT+02:00 Aki Tuomi <aki.tuomi at dovecot.fi>:
> 
>> 
>> 
>> On 07.09.2017 15:26, Antoine Nguyen wrote:
>>> Hi all,
>>> 
>>> I've just upgraded my server from debian 8 to debian 9 and I now
>> encounter
>>> a strange issue. I'm using prosody (XMPP server), configured to
>>> authenticate against dovecot using SASL and a unix socket.
>>> 
>>> This setup was working fine on debian 8.
>>> 
>>> Now, each time I try to connect using my XMPP client, the authentication
>>> fails and I see the following error in logs:
>>> 
>>> auth: Error: BUG: Authentication client said it's PID 0
>>> 
>>> Have you ever heard about this?
>>> 
>>> For information, dovecot version is 2.2.27.
>>> 
>>> Thank you,
>>> Antoine Nguyen
>> That seems to be a bug in XMPP. It should not use PID 0.
>> 
>> 
> The XMPP server runs as 'prosody' user, not root...


PID is process id, not user id.

Sami