Hi,

as discussed with cmouse on freenode two days ago please find attached necessary debug information on a crashing imap-login process, that appeared after upgrading to v2.3 (+ sieve). It is a standard setup in combination with postfix and thunderbird, roundcube and K9(Android) as imap clients. Panic happens 5-6 times a day, but no influence on user experience. Unfortunately i have no idea what might be causing it.

Let me know if you need more information.

Andreas

syslog: Feb 19 21:09:37 hafnium.d9c.eu dovecot[14324]: imap-login: Fatal: master: service(imap-login): child 30653 killed with signal 6 (core dumped)

dovecot.log: Feb 19 20:57:07 imap(user@d9c.eu)<30655><7C/91pVl0q3CJ7cC>: Info: Connection closed (IDLE running for 0.001 + waiting input for 1109.126 secs, 2 B in + 10 B out, state=wait-input) in=699 out= Feb 19 20:57:24 imap(user@d9c.eu)<30656><PuD+1pVl1a3CJ7cC>: Info: Connection closed (IDLE running for 0.001 + waiting input for 1123.798 secs, 2 B in + 10 B out, state=wait-input) in=91 out=1 Feb 19 21:02:15 imap(user@d9c.eu)<30999><IS1w55VlKKrDJbhD>: Info: Connection closed (IDLE running for 0.001 + waiting input for 1143.235 secs, 2 B in + 10 B out, state=wait-input) in=686 out= Feb 19 21:02:23 imap(user@d9c.eu)<30998><5B5v55VlJqrDJbhD>: Info: Connection closed (IDLE running for 0.001 + waiting input for 1147.566 secs, 2 B in + 10 B out, state=wait-input) in=99 out=1 Feb 19 21:08:36 imap(user@d9c.eu)<30657><D7QC15Vl1q3CJ7cC>: Info: Disconnected for inactivity in=91 out=919 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0 Feb 19 21:08:37 imap(user@d9c.eu)<30658><n6EG15Vl163CJ7cC>: Info: Disconnected for inactivity in=719 out=5345 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0

dovecot -n

# 2.3.0 (c8b89eb): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.0.1 (d33dca20) # OS: Linux 4.15.3-2-ARCH x86_64 auth_debug = yes auth_mechanisms = plain login auth_verbose = yes debug_log_path = /var/log/dovecot-debug.log info_log_path = /var/log/dovecot.log login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k mail_gid = vmail mail_home = /app/vmail/%d/%n mail_location = sdbox:%h/sdbox mail_plugins = " quota" mail_uid = vmail 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 editheader mdbox_rotate_interval = 1 days mdbox_rotate_size = 8 M namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = dict:user::file:%h/mdbox/dovecot-quota sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +editheader } protocols = imap pop3 lmtp sieve service auth-worker { user = $default_internal_user } service auth { unix_listener /var/spool/postfix-sasl/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { chroot = executable = imap-login -D inet_listener imap { port = 143 } inet_listener imaps { port = 0 } service_count = 0 } service lmtp { unix_listener /var/spool/postfix-mail/private/dovecot-lmtp { group = postfix mode = 0660 user = postfix } } service managesieve-login { inet_listener sieve { port = 4190 } process_min_avail = 1 } service pop3-login { inet_listener pop3 { port = 0 } inet_listener pop3s { port = 995 ssl = yes } } ssl = required ssl_cert = </etc/cert.ec.crt ssl_cipher_list = ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { driver = prefetch } userdb { driver = static } protocol lmtp { mail_plugins = " quota sieve" } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep mail_max_userip_connections = 25 mail_plugins = " quota imap_quota" }

(gdb) bt full #0 0x00007fddd9433860 in raise () from /usr/lib/libc.so.6 No symbol table info available. #1 0x00007fddd9434ec9 in abort () from /usr/lib/libc.so.6 No symbol table info available. #2 0x00007fddd987a521 in default_fatal_finish (type=LOG_TYPE_PANIC, status=status@entry=0) at failures.c:228 backtrace = 0x561a9c8612f0 "/usr/lib/dovecot/libdovecot.so.0(+0xc4567) [0x7fddd987a567] -> /usr/lib/dovecot/libdovecot.so.0(+0xc462a) [0x7fddd987a62a] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fddd97e9df9] -> /usr/lib/d"... recursed = 0 #3 0x00007fddd987a62a in i_internal_fatal_handler (ctx=0x7ffdbd74cd70, format=<optimized out>, args=<optimized out>) at failures.c:718 status = 0 #4 0x00007fddd97e9df9 in i_panic (format=format@entry=0x7fddd9b35a88 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:306 ctx = {type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0, log_prefix = 0x0} args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7ffdbd74ce70, reg_save_area = 0x7ffdbd74cdb0}} #5 0x00007fddd9b2e2e9 in client_destroy (client=<optimized out>, reason=reason@entry=0x7fddd9b35e21 "Disconnected: Shutting down") at client-common.c:272 __func__ = "client_destroy" #6 0x00007fddd9b2e624 in clients_destroy_all_reason (reason=0x7fddd9b35e21 "Disconnected: Shutting down") at client-common.c:430 client = <optimized out> next = 0x0 #7 0x0000561a9aeeb12a in imap_login_deinit () at imap-login-client.c:764 No locals. #8 0x00007fddd9b34587 in main_deinit () at main.c:475 strp = <optimized out> strp = <optimized out> strp_end = <optimized out> #9 login_binary_run (binary=<optimized out>, argc=<optimized out>, argv=<optimized out>) at main.c:550 set_pool = 0x561a9c86b100 login_socket = 0x7fddd9b37ab9 "login" c = <optimized out> #10 0x00007fddd941ff4a in __libc_start_main () from /usr/lib/libc.so.6 No symbol table info available. #11 0x0000561a9aeeaeaa in _start () No symbol table info available. (gdb)