assertion failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)

[Giacomo]

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 at 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 at 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 at open-xchange.com <mailto:aki.tuomi at 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
>> >
>>
>>
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