zlib plugin producing errors on 2.3.0

[Florian Pritz]

On 24.12.2017 15:58, Adam Weinberger wrote:
> Hello,
> 
> I use the zlib and imap_zlib plugins on FreeBSD. As of 2.3.0, my logs
> are producing these errors every so often, but AFAICT the messages
> themselves aren't getting corrupted.
> 
> Panic: file ostream-zlib.c: line 36 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0)
> Fatal: master: service(imap): child 80128 killed with signal 6 (core not dumped - set service imap { drop_priv_before_exec=yes })
> Panic: file ostream-zlib.c: line 36 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0)
> Fatal: master: service(imap): child 80266 killed with signal 6 (core not dumped - set service imap { drop_priv_before_exec=yes })

I'm also seeing these errors, but I actually use gz compression. I'm
running 2.3.0 on Arch Linux. Config and logs are below.

Do you need any more information or can you reproduce this?

Florian


log:

> Jan  5 17:37:38 karif dovecot[28075]: imap(xxx)<29587><u2BR4gdi6d6kJ9hk>: Panic: file ostream-zlib.c: line 36 (o_stream_zlib_close): assertion failed: (zstream->ostream.finished || zstream->ostream.ostream.stream_errno != 0)
> Jan  5 17:37:38 karif dovecot[28075]: imap(xxx)<29587><u2BR4gdi6d6kJ9hk>: Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xc4567) [0x7fe8af7be567] -> /usr/lib/dovecot/libdovecot.so.0(+0xc462a) [0x7fe8af7be62a] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7
> fe8af72ddf9] -> /usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x757b) [0x7fe8ae91a57b] -> /usr/lib/dovecot/libdovecot.so.0(+0xeb686) [0x7fe8af7e5686] -> dovecot/imap(+0x18bcd) [0x56168ab2fbcd] -> dovecot/imap(+0x11755) [0x56168ab28755] -> /usr/lib/dovecot/libdovecot.so.0(
> io_loop_call_io+0x6b) [0x7fe8af7d691b] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x137) [0x7fe8af7d8247] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4d) [0x7fe8af7d6a1d] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x39) [0x7fe8af7d6
> c39] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x14) [0x7fe8af7515a4] -> dovecot/imap(main+0x357) [0x56168ab23cc7] -> /usr/lib/libc.so.6(__libc_start_main+0xea) [0x7fe8af362f4a] -> dovecot/imap(_start+0x2a) [0x56168ab23eba]
> Jan  5 17:37:38 karif dovecot[28075]: imap(xxx)<29587><u2BR4gdi6d6kJ9hk>: Fatal: master: service(imap): child 29587 killed with signal 6 (core not dumped)

config:

> # 2.3.0 (c8b89eb): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.0 (d68c23a1)
> # OS: Linux 4.14.6-1-ARCH x86_64 Arch Linux 
> auth_mechanisms = plain login
> auth_username_format = %Ln
> imap_id_log = *
> login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k
> mail_location = mdbox:~/.mdbox
> mail_plugins = " zlib notify mail_log quota"
> managesieve_notify_capability = mailto
> managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext
> mdbox_rotate_size = 20 M
> namespace inbox {
>   hidden = no
>   inbox = yes
>   list = yes
>   location = 
>   mailbox Drafts {
>     auto = subscribe
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     auto = subscribe
>     special_use = \Junk
>   }
>   mailbox Sent {
>     auto = subscribe
>     special_use = \Sent
>   }
>   mailbox Trash {
>     auto = subscribe
>     special_use = \Trash
>   }
>   prefix = 
>   separator = .
>   type = private
> }
> passdb {
>   driver = pam
> }
> plugin {
>   mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
>   mail_log_fields = uid box msgid size
>   quota = count:User quota
>   quota_status_nouser = DUNNO
>   quota_status_overquota = 552 5.2.2 Mailbox is full
>   quota_status_success = DUNNO
>   quota_vsizes = yes
>   sieve = ~/.dovecot.sieve
>   sieve_dir = ~/.sieve
>   sieve_global_dir = /etc/dovecot/sieve/global/
>   sieve_global_path = /etc/dovecot/sieve/default.sieve
>   zlib_save = gz
>   zlib_save_level = 9
> }
> protocols = imap pop3 sieve lmtp
> service auth {
>   unix_listener auth-client {
>     group = postfix
>     mode = 0660
>     user = postfix
>   }
>   user = root
> }
> service imap-login {
>   process_limit = 400
>   process_min_avail = 5
> }
> service lmtp {
>   drop_priv_before_exec = yes
>   unix_listener /var/spool/postfix/private/dovecot-lmtp {
>     group = postfix
>     mode = 0660
>     user = postfix
>   }
> }
> service managesieve-login {
>   inet_listener sieve-obsolete {
>     port = 2000
>   }
> }
> ssl_cert = </etc/letsencrypt/live/mail.server-speed.net/fullchain.pem
> ssl_cipher_list = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA
> ssl_dh =  # hidden, use -P to show it
> ssl_key =  # hidden, use -P to show it
> ssl_options = no_compression
> ssl_prefer_server_ciphers = yes
> userdb {
>   driver = passwd
> }
> protocol imap {
>   imap_client_workarounds = tb-extra-mailbox-sep
>   mail_max_userip_connections = 30
>   mail_plugins = " zlib notify mail_log quota imap_zlib"
> }
> protocol lda {
>   mail_plugins = " zlib notify mail_log quota sieve"
>   postmaster_address = postmaster at server-speed.net
> }
> protocol lmtp {
>   mail_plugins = " zlib notify mail_log quota sieve"
>   postmaster_address = postmaster at server-speed.net
> }
> protocol sieve {
>   managesieve_logout_format = bytes ( in=%i : out=%o )
> }

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