Re: assertion failed: (srcleft <= CHARSET_MAX_PENDING_BUF_SIZE)

[Stephan Bosch]

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.tu...@open-xchange.com <mailto:aki.tu...@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