Hi Giacomo,

Op 21/12/2018 om 16:16 schreef Giacomo:

The bug happens not very often, it might need a week to get a core file.

Any luck getting a core file?

Regards,

Stephan.

Il giorno ven 21 dic 2018 alle ore 15:18 Aki Tuomi mailto:aki.tuomi@open-xchange.com> ha scritto:

On 21.12.2018 14.49, Giacomo wrote:
> I'm running the following:
>
> # 2.3.4 (0ecbaf23d): /usr/local/etc/dovecot/dovecot.conf
> # OS: FreeBSD 11.2-RELEASE-p4 amd64
> # FS: ZFS
>
> auth_mechanisms = plain login
> auth_username_format = %Ln
> listen = *
> mail_location = maildir:~/Maildir
> namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     auto = subscribe
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     auto = subscribe
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     auto = subscribe
>     special_use = \Trash
>   }
>   prefix =
> }
> passdb {
>   driver = pam
> }
> protocols = imap lmtp
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0666
>     user = postfix
>   }
>   user = dovecot
> }
> service imap-login {
>   inet_listener imap {
>     port = 0
>   }
> }
> service lmtp {
>   unix_listener /var/spool/postfix/private/dovecot-lmtp {
>     group = postfix
>     mode = 0600
>     user = postfix
>   }
> }
> service stats {
>   unix_listener stats-reader {
>     group =
>     mode = 0600
>     user =
>   }
>   unix_listener stats-writer {
>     group = $default_internal_group
>     mode = 0666
>     user =
>   }
>   user = $default_internal_user
> }
> ssl_cert = </root/cert.pem
> ssl_key = # hidden, use -P to show it
> userdb {
>   driver = passwd
> }
>
> dmesg shows:
>
> pid 74441 (imap), uid 1002: exited on signal 6
> pid 74784 (imap), uid 1002: exited on signal 6
> pid 21471 (imap), uid 1002: exited on signal 6
> pid 21470 (imap), uid 1002: exited on signal 6
> pid 21464 (imap), uid 1002: exited on signal 6
> pid 21731 (imap), uid 1002: exited on signal 6
>
> Sometimes the dovecot process serving an user crashes. He runs
mostly
> airmail on macOS and samsung mail on Android.
>
> Happens only to that particular user.
>
> The log shows the following: (maillog)
>
> Dec 16 14:52:35 mail dovecot: imap-login: Login: user=<USER>,
> method=PLAIN, rip=79.12.201.157, lip=192.168.1.28, mpid=74779, TLS,
> session=<wMQI+iN9VtRPDMmd>
> Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>:
> Panic: file charset-iconv.c: line 83 (charset_to_utf8_try):
assertion
> failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)
> Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>:
> Fatal: master: service(imap): child 74441 killed with signal 6 (core
> not dumped - https://dovecot.org/bugreport.html#coredumps - set
> service imap { drop_priv_before_exec=yes })
>
> I'm here if more info is needed.
>
> Thanks for taking a look.


Can you somehow get a core file and get backtrace from it?


Aki

I got a core file this morning.

opening it with gdb I get this:

(gdb) core imap.core Core was generated by `dovecot/imap'. Program terminated with signal 6, Aborted. #0 0x0000000011c1347a in ?? () (gdb) bt #0 0x0000000011c1347a in ?? () #1 0x0000000011c13444 in ?? () #2 0x0000000000018dee in ?? () #3 0x306db139575f3b0d in ?? () #4 0x00007fffffffc144 in ?? () #5 0x0000000000000000 in ?? ()

Doesn't look clean at all.

let me know if I should upload the file somewhere.

Thanks

Il giorno lun 21 gen 2019 alle ore 08:52 Giacomo giacomo1989@gmail.com ha scritto:

I've just enabled core dumps on the involved FreeBSD system. Let's see if it dumps something..

Il giorno dom 20 gen 2019 alle ore 19:16 Stephan Bosch < stephan@rename-it.nl> ha scritto:

...

Hi Giacomo,

Op 21/12/2018 om 16:16 schreef Giacomo:

...

The bug happens not very often, it might need a week to get a core file.

Any luck getting a core file?

Regards,

Stephan.

...

Il giorno ven 21 dic 2018 alle ore 15:18 Aki Tuomi mailto:aki.tuomi@open-xchange.com> ha scritto:

On 21.12.2018 14.49, Giacomo wrote:
> I'm running the following:
>
> # 2.3.4 (0ecbaf23d): /usr/local/etc/dovecot/dovecot.conf
> # OS: FreeBSD 11.2-RELEASE-p4 amd64
> # FS: ZFS
>
> auth_mechanisms = plain login
> auth_username_format = %Ln
> listen = *
> mail_location = maildir:~/Maildir
> namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     auto = subscribe
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     auto = subscribe
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     auto = subscribe
>     special_use = \Trash
>   }
>   prefix =
> }
> passdb {
>   driver = pam
> }
> protocols = imap lmtp
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0666
>     user = postfix
>   }
>   user = dovecot
> }
> service imap-login {
>   inet_listener imap {
>     port = 0
>   }
> }
> service lmtp {
>   unix_listener /var/spool/postfix/private/dovecot-lmtp {
>     group = postfix
>     mode = 0600
>     user = postfix
>   }
> }
> service stats {
>   unix_listener stats-reader {
>     group =
>     mode = 0600
>     user =
>   }
>   unix_listener stats-writer {
>     group = $default_internal_group
>     mode = 0666
>     user =
>   }
>   user = $default_internal_user
> }
> ssl_cert = </root/cert.pem
> ssl_key = # hidden, use -P to show it
> userdb {
>   driver = passwd
> }
>
> dmesg shows:
>
> pid 74441 (imap), uid 1002: exited on signal 6
> pid 74784 (imap), uid 1002: exited on signal 6
> pid 21471 (imap), uid 1002: exited on signal 6
> pid 21470 (imap), uid 1002: exited on signal 6
> pid 21464 (imap), uid 1002: exited on signal 6
> pid 21731 (imap), uid 1002: exited on signal 6
>
> Sometimes the dovecot process serving an user crashes. He runs
mostly
> airmail on macOS and samsung mail on Android.
>
> Happens only to that particular user.
>
> The log shows the following: (maillog)
>
> Dec 16 14:52:35 mail dovecot: imap-login: Login: user=<USER>,
> method=PLAIN, rip=79.12.201.157, lip=192.168.1.28, mpid=74779,

TLS,

...

> session=<wMQI+iN9VtRPDMmd>
> Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>:
> Panic: file charset-iconv.c: line 83 (charset_to_utf8_try):
assertion
> failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)
> Dec 16 14:52:39 mail dovecot: imap(USER)<74441><nLa+7SN9+fhPDMmd>:
> Fatal: master: service(imap): child 74441 killed with signal 6

(core

...

> not dumped - https://dovecot.org/bugreport.html#coredumps - set
> service imap { drop_priv_before_exec=yes })
>
> I'm here if more info is needed.
>
> Thanks for taking a look.


Can you somehow get a core file and get backtrace from it?


Aki

for FreeBSD you can add to /etc/make.conf: WITH_DEBUG_PORTS=mail/dovecot mail/dovecot-pigeonhole

and rebuild the packages. (from the FreeBSD port maintainer, me).

On Mon, Feb 11, 2019 at 10:31 AM Stephan Bosch via dovecot < dovecot@dovecot.org> wrote:

Op 9-2-2019 om 19:27 schreef Giacomo via dovecot:

...

I got a core file this morning.

opening it with gdb I get this:

(gdb) core imap.core Core was generated by `dovecot/imap'. Program terminated with signal 6, Aborted. #0 0x0000000011c1347a in ?? () (gdb) bt #0 0x0000000011c1347a in ?? () #1 0x0000000011c13444 in ?? () #2 0x0000000000018dee in ?? () #3 0x306db139575f3b0d in ?? () #4 0x00007fffffffc144 in ?? () #5 0x0000000000000000 in ?? ()

Doesn't look clean at all.

That is not that helpful. Did you install debug symbols for Dovecot? This is usually a separate package. It all depends on your OS. I am not familiar with FreeBSD.

Regards,

Stephan.

...

let me know if I should upload the file somewhere.

Thanks

Il giorno lun 21 gen 2019 alle ore 08:52 Giacomo mailto:giacomo1989@gmail.com> ha scritto:

I've just enabled core dumps on the involved FreeBSD system. Let's
see if it dumps something..

Il giorno dom 20 gen 2019 alle ore 19:16 Stephan Bosch
<stephan@rename-it.nl <mailto:stephan@rename-it.nl>> ha scritto:

    Hi Giacomo,

    Op 21/12/2018 om 16:16 schreef Giacomo:
    > The bug happens not very often, it might need a week to get
    a core file.

    Any luck getting a core file?

    Regards,

    Stephan.
    >
    >
    > Il giorno ven 21 dic 2018 alle ore 15:18 Aki Tuomi
    > <aki.tuomi@open-xchange.com
    <mailto:aki.tuomi@open-xchange.com>
    <mailto:aki.tuomi@open-xchange.com
    <mailto:aki.tuomi@open-xchange.com>>> ha
    > scritto:
    >
    >
    >     On 21.12.2018 14.49, Giacomo wrote:
    >     > I'm running the following:
    >     >
    >     > # 2.3.4 (0ecbaf23d): /usr/local/etc/dovecot/dovecot.conf
    >     > # OS: FreeBSD 11.2-RELEASE-p4 amd64
    >     > # FS: ZFS
    >     >
    >     > auth_mechanisms = plain login
    >     > auth_username_format = %Ln
    >     > listen = *
    >     > mail_location = maildir:~/Maildir
    >     > namespace inbox {
    >     >   inbox = yes
    >     >   location =
    >     >   mailbox Drafts {
    >     >     auto = subscribe
    >     >     special_use = \Drafts
    >     >   }
    >     >   mailbox Junk {
    >     >     auto = subscribe
    >     >     special_use = \Junk
    >     >   }
    >     >   mailbox Sent {
    >     >     special_use = \Sent
    >     >   }
    >     >   mailbox Trash {
    >     >     auto = subscribe
    >     >     special_use = \Trash
    >     >   }
    >     >   prefix =
    >     > }
    >     > passdb {
    >     >   driver = pam
    >     > }
    >     > protocols = imap lmtp
    >     > service auth {
    >     >   unix_listener /var/spool/postfix/private/auth {
    >     >     group = postfix
    >     >     mode = 0666
    >     >     user = postfix
    >     >   }
    >     >   user = dovecot
    >     > }
    >     > service imap-login {
    >     >   inet_listener imap {
    >     >     port = 0
    >     >   }
    >     > }
    >     > service lmtp {
    >     >   unix_listener /var/spool/postfix/private/dovecot-lmtp {
    >     >     group = postfix
    >     >     mode = 0600
    >     >     user = postfix
    >     >   }
    >     > }
    >     > service stats {
    >     >   unix_listener stats-reader {
    >     >     group =
    >     >     mode = 0600
    >     >     user =
    >     >   }
    >     >   unix_listener stats-writer {
    >     >     group = $default_internal_group
    >     >     mode = 0666
    >     >     user =
    >     >   }
    >     >   user = $default_internal_user
    >     > }
    >     > ssl_cert = </root/cert.pem
    >     > ssl_key = # hidden, use -P to show it
    >     > userdb {
    >     >   driver = passwd
    >     > }
    >     >
    >     > dmesg shows:
    >     >
    >     > pid 74441 (imap), uid 1002: exited on signal 6
    >     > pid 74784 (imap), uid 1002: exited on signal 6
    >     > pid 21471 (imap), uid 1002: exited on signal 6
    >     > pid 21470 (imap), uid 1002: exited on signal 6
    >     > pid 21464 (imap), uid 1002: exited on signal 6
    >     > pid 21731 (imap), uid 1002: exited on signal 6
    >     >
    >     > Sometimes the dovecot process serving an user crashes.
    He runs
    >     mostly
    >     > airmail on macOS and samsung mail on Android.
    >     >
    >     > Happens only to that particular user.
    >     >
    >     > The log shows the following: (maillog)
    >     >
    >     > Dec 16 14:52:35 mail dovecot: imap-login: Login:
    user=<USER>,
    >     > method=PLAIN, rip=79.12.201.157, lip=192.168.1.28,
    mpid=74779, TLS,
    >     > session=<wMQI+iN9VtRPDMmd>
    >     > Dec 16 14:52:39 mail dovecot:
    imap(USER)<74441><nLa+7SN9+fhPDMmd>:
    >     > Panic: file charset-iconv.c: line 83
    (charset_to_utf8_try):
    >     assertion
    >     > failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)
    >     > Dec 16 14:52:39 mail dovecot:
    imap(USER)<74441><nLa+7SN9+fhPDMmd>:
    >     > Fatal: master: service(imap): child 74441 killed with
    signal 6 (core
    >     > not dumped -
    https://dovecot.org/bugreport.html#coredumps - set
    >     > service imap { drop_priv_before_exec=yes })
    >     >
    >     > I'm here if more info is needed.
    >     >
    >     > Thanks for taking a look.
    >
    >
    >     Can you somehow get a core file and get backtrace from it?
    >
    >
    >     Aki
    >

-- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 (c) E-Mail: larryrtx@gmail.com US Mail: 5708 Sabbia Dr, Round Rock, TX 78665-2106