Dovecot User Listing Error - getpwent() failed: Invalid Argument

[Reuben Farrelly]

Sure:

thunderstorm ~ # cat /etc/nsswitch.conf
# /etc/nsswitch.conf:
# $Header: 
/var/cvsroot/gentoo/src/patchsets/glibc/extra/etc/nsswitch.conf,v 1.2 
2017/08/12 16:21:44 slyfox Exp $

passwd:      compat files
shadow:      compat files
group:       compat files

hosts:       files dns
networks:    files dns

services:    db files
protocols:   db files
rpc:         db files
ethers:      db files
netmasks:    files
netgroup:    files
bootparams:  files

automount:   files
aliases:     files
thunderstorm ~ #

Reuben

On 19/09/2018 5:41 pm, Aki Tuomi wrote:
> Can you provide your /etc/nssswitch.conf?
> 
> Aki
> 
> 
> On 19.09.2018 10:40, Reuben Farrelly wrote:
>> I've been running with this almost identical patch already for some time:
>>
>> diff -up dovecot-2.3.0.1/src/auth/mycrypt.c.libxcrypt
>> dovecot-2.3.0.1/src/auth/mycrypt.c
>> --- dovecot-2.3.0.1/src/auth/mycrypt.c.libxcrypt       2018-02-28
>> 15:28:58.000000000 +0100
>> +++ dovecot-2.3.0.1/src/auth/mycrypt.c 2018-03-27 10:57:38.447769201
>> +0200
>> @@ -14,6 +14,7 @@
>>   #  define _XPG6 /* Some Solaris versions require this, some break
>> with this */
>>   #endif
>>   #include <unistd.h>
>> +#include <crypt.h>
>>
>>   #include "mycrypt.h"
>>
>> That fixed the build problem I had, but the warning below remains.
>>
>> (Tracking master-2.3 git)
>>
>> Reuben
>>
>>
>> On 19/09/2018 5:34 pm, Aki Tuomi wrote:
>>> This is bit of a longshot, but can you try applying
>>> https://github.com/dovecot/core/commit/63a74b9.patch and see if this
>>> helps?
>>>
>>> Aki
>>>
>>>
>>> On 19.09.2018 10:33, Reuben Farrelly wrote:
>>>> glibc-2.28.
>>>>
>>>> There was a posting by Michael Marley on 31/08 saying he saw something
>>>> similar to this problem after upgrading to 2.28 as well with 'doveadm
>>>> purge'.
>>>>
>>>> Reuben
>>>>
>>>> On 19/09/2018 4:50 pm, Aki Tuomi wrote:
>>>>> Which glibc version are you using?
>>>>>
>>>>> Aki
>>>>>
>>>>> On 19.09.2018 09:39, Reuben Farrelly wrote:
>>>>>> Hi Aki,
>>>>>>
>>>>>> How did you go with this in the end?  Do you need anything more from
>>>>>> me or were you able to reproduce this?
>>>>>>
>>>>>> Thanks,
>>>>>> Reuben
>>>>>>
>>>>>> On 1/09/2018 12:41 am, Reuben Farrelly wrote:
>>>>>>> Sure:
>>>>>>>
>>>>>>> https://www.reub.net/files/dovecot/lightning-dovecot.conf
>>>>>>> https://www.reub.net/files/dovecot/thunderstorm-dovecot.conf
>>>>>>>
>>>>>>> Updated nightly.
>>>>>>>
>>>>>>> Reuben
>>>>>>>
>>>>>>>
>>>>>>> On 1/09/2018 12:26 am, Aki Tuomi wrote:
>>>>>>>> Can you provide doveconf -n?
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> ---
>>>>>>>> Aki Tuomi
>>>>>>>> Dovecot oy
>>>>>>>>
>>>>>>>> -------- Original message --------
>>>>>>>> From: Reuben Farrelly <reuben-dovecot at reub.net>
>>>>>>>> Date: 31/08/2018 17:12 (GMT+02:00)
>>>>>>>> To: Aki Tuomi <aki.tuomi at dovecot.fi>, Dovecot Mailing List
>>>>>>>> <dovecot at dovecot.org>
>>>>>>>> Subject: Re: Dovecot User Listing Error - getpwent() failed:
>>>>>>>> Invalid
>>>>>>>> Argument
>>>>>>>>
>>>>>>>> No.  Neither of those are installed on either system.
>>>>>>>>
>>>>>>>> Reuben
>>>>>>>>
>>>>>>>> On 1/09/2018 12:09 am, Aki Tuomi wrote:
>>>>>>>>     > Could apparmor or selinux be causing this!
>>>>>>>>     >
>>>>>>>>     >
>>>>>>>>     >
>>>>>>>>     > ---
>>>>>>>>     > Aki Tuomi
>>>>>>>>     > Dovecot oy
>>>>>>>>     >
>>>>>>>>     > -------- Original message --------
>>>>>>>>     > From: Reuben Farrelly <reuben-dovecot at reub.net>
>>>>>>>>     > Date: 31/08/2018 16:50 (GMT+02:00)
>>>>>>>>     > To: Dovecot Mailing List <dovecot at dovecot.org>
>>>>>>>>     > Subject: Dovecot User Listing Error - getpwent() failed:
>>>>>>>> Invalid
>>>>>>>> Argument
>>>>>>>>     >
>>>>>>>>     > Hi,
>>>>>>>>     >
>>>>>>>>     > I'm running dovecot-2.3 git and seeing on 2 of my Dovecot
>>>>>>>> installations,
>>>>>>>>     > the following message logged quite frequently:
>>>>>>>>     >
>>>>>>>>     > Aug 31 16:55:53 lightning.reub.net dovecot[7698]:
>>>>>>>> auth-worker(7707):
>>>>>>>>     > Error: getpwent() failed: Invalid argument
>>>>>>>>     > Aug 31 16:55:53 lightning.reub.net dovecot[7698]: replicator:
>>>>>>>> Error:
>>>>>>>>     > User listing returned failure
>>>>>>>>     > Aug 31 16:55:53 lightning.reub.net dovecot[7698]: replicator:
>>>>>>>> Error:
>>>>>>>>     > listing users failed, can't replicate existing data
>>>>>>>>     >
>>>>>>>>     > It appears that this could be having an effect on replication,
>>>>>>>> but it's
>>>>>>>>     > unclear because the secondary/replica doesn't see much
>>>>>>>> traffic.
>>>>>>>>     >
>>>>>>>>     > Authentication is via PAM and the system is Gentoo Linux
>>>>>>>> x86_64.
>>>>>>>> passb
>>>>>>>>     > driver = pam, userdb driver = static .
>>>>>>>>     >
>>>>>>>>     > doveadm user -u '*' shows the system users listed twice
>>>>>>>> like this
>>>>>>>> (is
>>>>>>>>     > this a problem?) and then prints:
>>>>>>>>     >
>>>>>>>>     > ----
>>>>>>>>     > reuben
>>>>>>>>     > liam
>>>>>>>>     > reuben
>>>>>>>>     > liam
>>>>>>>>     > <some other users>
>>>>>>>>     > Error: User listing returned failure
>>>>>>>>     > Fatal: user listing failed
>>>>>>>>     > ----
>>>>>>>>     >
>>>>>>>>     > To me that doesn't look right.
>>>>>>>>     >
>>>>>>>>     > Can anyone suggest what could be causing this?  I don't recall
>>>>>>>> seeing
>>>>>>>>     > this message some time ago so I suspect it's a recent
>>>>>>>> change in
>>>>>>>> either
>>>>>>>>     > dovecot, or pam or glibc etc..
>>>>>>>>     >
>>>>>>>>     > Thanks,
>>>>>>>>     > Reuben
>>>>>
>>>
>