dovecot - Mar 2019 - submission-login: Fatal: master: service(submission-login):

Hi everyone!

I?m using dovecot 2.3.5. submission-login is crashing many times in a day:

Here is a sample error message:

dovecot: submission-login: Fatal: master: service(submission-login): child 34247
killed with signal 11 (core not dumped -
https://dovecot.org/bugreport.html#coredumps - set service submission-login {
drop_priv_before_exec=yes })

After I added drop_priv_before_exec, I got these error messages:

submission-login: Error: master-service: cannot get filters:
net_connect_unix(/var/run/dovecot/config) failed: Permission denied
dovecot: master: Error: service(submission-login): command startup failed,
throttling for 2 secs

How to get submission core dumps properly?

Thank you.

? 
Marcelo Coelho

On 11 Mar 2019, at 13.53, Marcelo Coelho via dovecot <dovecot at
dovecot.org> wrote:
> 
> Hi everyone!
> 
> I?m using dovecot 2.3.5. submission-login is crashing many times in a day:
> 
> Here is a sample error message:
> 
> dovecot: submission-login: Fatal: master: service(submission-login): child
34247 killed with signal 11 (core not dumped -
https://dovecot.org/bugreport.html#coredumps - set service submission-login {
drop_priv_before_exec=yes })
> 
> After I added drop_priv_before_exec, I got these error messages:
If you're using Linux, you could alternatively: sysctl -w fs.suid_dumpable=2
> submission-login: Error: master-service: cannot get filters:
net_connect_unix(/var/run/dovecot/config) failed: Permission denied
> dovecot: master: Error: service(submission-login): command startup failed,
throttling for 2 secs

This could be avoided with adding to dovecot.conf:

service config {
  unix_listener config {
    mode = 0666
  }
}

Op 11/03/2019 om 12:53 schreef Marcelo Coelho via
dovecot:
> Hi everyone!
>
> I?m using dovecot 2.3.5. submission-login is crashing many times in a day:
>
> Here is a sample error message:
>
> dovecot: submission-login: Fatal: master: service(submission-login): child
34247 killed with signal 11 (core not dumped -
https://dovecot.org/bugreport.html#coredumps - set service submission-login {
drop_priv_before_exec=yes })
>
> After I added drop_priv_before_exec, I got these error messages:
>
> submission-login: Error: master-service: cannot get filters:
net_connect_unix(/var/run/dovecot/config) failed: Permission denied
> dovecot: master: Error: service(submission-login): command startup failed,
throttling for 2 secs
>
> How to get submission core dumps properly?
>
> Thank you.
We got a fix for this bug in off-list discussions.

Tracking as DOP-987.

Regards,

Stephan.