master: service(imap): child xxxx killed with signal 11

[Lukas Matasovsky]

Hi,

I am just investigating on another server Debian, directly after upgrading
to dovecot .17:

Jan  2 11:55:10 judy dovecot: auth: Debug: auth client connected (pid=8682)
Jan  2 11:55:10 judy dovecot: auth: Debug: client in:
AUTH#0111#011PLAIN#011service=imap#011session=aL3mPJfUmpXAqAIy#011lip=192.168.2.1#011rip=192.168.2.50#011lport=143#011rport=38298

Jan  2 11:55:10 judy dovecot: auth: Debug: client passdb out: CONT#0111#011
Jan  2 11:55:10 judy dovecot: auth: Debug: client in: CONT<hidden>
Jan  2 11:55:10 judy dovecot: auth: Debug:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Performing passdb lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>: Handling PASSV
request
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Performing passdb lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): lookup service=dovecot
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): #1/1 style=1 msg=Password
:
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Finished passdb lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<197>: Finished
Jan  2 11:55:10 judy dovecot: auth: Debug:
pam(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Finished passdb lookup
Jan  2 11:55:10 judy dovecot: auth: Debug:
auth(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Auth request finished
Jan  2 11:55:10 judy dovecot: auth: Debug: client passdb out:
OK#0111#011user=lukasm#011
Jan  2 11:55:10 judy dovecot: auth: Debug: master in:
REQUEST#0112975727617#0118682#0111#011c681c4159deed081b164a458bfa5ffcb#011session_pid=8683#011request_auth_token

Jan  2 11:55:10 judy dovecot: auth: Debug:
passwd(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Performing userdb lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<198>: Handling USER
request
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<198>:
passwd(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Performing userdb look
up
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<198>:
passwd(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<198>:
passwd(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Finished userdb lookup
Jan  2 11:55:10 judy dovecot: auth-worker(8349): Debug: conn
unix:auth-worker (pid=8004,uid=120): auth-worker<198>: Finished
Jan  2 11:55:10 judy dovecot: auth: Debug:
passwd(lukasm,192.168.2.50,<aL3mPJfUmpXAqAIy>): Finished userdb lookup
Jan  2 11:55:10 judy dovecot: auth: Debug: master userdb out:
USER#0112975727617#011lukasm#011system_groups_user=lukasm#011uid=1000#011gid=1000#011home=/home/lukasm#011auth_mech=PLAIN#01
1auth_token=d4309d087613af647782c4f47f50ab8ffc47a25c
Jan  2 11:55:10 judy dovecot: imap-login: Login: user=<lukasm>,
method=PLAIN, rip=192.168.2.50, lip=192.168.2.1, mpid=8683,
session=<aL3mPJfUmpXAqAIy>
Jan  2 11:55:10 judy dovecot: imap(monica)<8680><OcLiPJfUmJXAqAIy>: Fatal:
master: service(imap): child 8680 killed with signal 11 (core dumps
disabled - https://dovecot.org/bugreport.ht
ml#coredumps)

Would you like to have a coredump as well?

Thank you & cheers, Lukas


On Sun, Jan 2, 2022 at 2:06 AM Lukas Matasovsky <lukas.matasovsky at gmail.com>
wrote:

> Dear Maintainer,
>
> I have several dovecot installations, all of them stopped working with the
> upgrade from .16 to .17. Maybe I am missing something, or it's a bug. All I
> can see is a signal 11 after each login attempt.
>
> Attached you can find a sysreport plus a core dump, both from different
> states of configuration (I reverted the core-dump settings later on) of the
> same server, but the effect has been the same ever since upgrading.
> I have other servers that use pam (not mariadb) and local maildirs that
> show the same behavior.
>
> For now, I have downgraded all servers, if needed I could run some more
> tests.
>
> Thank you for checking & cheers, Lukas
>
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