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

[Aki Tuomi]

I have no idea why it's returning invalid argument, maybe you need to
raise this as issue with glibc?

Aki


On 19.09.2018 10:43, Reuben Farrelly wrote:
> 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
>>>>>>
>>>>
>>