On Tue, Jan 23, 2018 at 14:03:27 -0500, Josef 'Jeff' Sipek wrote: > On Tue, Jan 23, 2018 at 18:21:38 +0100, Thomas Robers wrote: > > Hello, > > > > I'm using Dovecot 2.3 and sometimes i get this: > > > > --- snip --- > > Jan 23 14:23:13 mail dovecot: imap(b...@tutech.de)<4880><PDqibHFjMvrAqG1n>: > > Panic: data stack: Out of memory when allocating 134217768 bytes > > Interesting... imap is trying to allocate 128MB and failing. A couple of > questions: > > 0. Does this user have any unusually large emails? > 1. Do you have any idea what the imap process was doing at the time of the > allocation failure? > 2. You snipped all the important parts of the back trace. :) It *starts* on > the line: > #0 0x00007f73f1386495 in raise () from /lib64/libc.so.6
In case you haven't used gdb before... after starting up gdb, run "bt full" at the gdb prompt. That'll print out a very detailed backtrace. (You might want to sanity check it to make sure there aren't any user passwords in it before posting it here...) Jeff. > Having the backtrace should help answer question number 1. > 3. How big is this process when it dies? > 4. Do you have any sort of ulimit/rlimit set on dovecot in whatever startup > script you use? > 5. Do you use cgroups to limit memory usage? > 6. Did you disable memory overcommit on the system? > > Jeff. > > > Jan 23 14:23:13 mail dovecot: imap(b...@tutech.de)<4880><PDqibHFjMvrAqG1n>: > > Fatal: master: service(imap): child 4880 killed with signal 6 (core dumped) > > --- snip --- > > > > The gdb backtrace is: > > > > --- snip --- > > GNU gdb (GDB) Red Hat Enterprise Linux (7.2-92.el6) > > Copyright (C) 2010 Free Software Foundation, Inc. > > License GPLv3+: GNU GPL version 3 or later > > <http://gnu.org/licenses/gpl.html> > > This is free software: you are free to change and redistribute it. > > There is NO WARRANTY, to the extent permitted by law. Type "show copying" > > and "show warranty" for details. > > This GDB was configured as "x86_64-redhat-linux-gnu". > > For bug reporting instructions, please see: > > <http://www.gnu.org/software/gdb/bugs/>... > > Reading symbols from /usr/libexec/dovecot/imap...(no debugging symbols > > found)...done. > > Attaching to program: /usr/libexec/dovecot/imap, process 4880 > > ptrace: Kein passender Prozess gefunden. > > [New Thread 4880] > > Reading symbols from /usr/lib64/dovecot/libdovecot-storage.so.0...(no > > debugging symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/libdovecot-storage.so.0 > > Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...(no debugging > > symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/libdovecot.so.0 > > Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. > > Loaded symbols for /lib64/libc.so.6 > > Reading symbols from /lib64/librt.so.1...(no debugging symbols > > found)...done. > > Loaded symbols for /lib64/librt.so.1 > > Reading symbols from /lib64/libdl.so.2...(no debugging symbols > > found)...done. > > Loaded symbols for /lib64/libdl.so.2 > > Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols > > found)...done. > > Loaded symbols for /lib64/ld-linux-x86-64.so.2 > > Reading symbols from /lib64/libpthread.so.0...(no debugging symbols > > found)...done. > > [Thread debugging using libthread_db enabled] > > Loaded symbols for /lib64/libpthread.so.0 > > Reading symbols from /usr/lib64/dovecot/lib01_acl_plugin.so...(no debugging > > symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib01_acl_plugin.so > > Reading symbols from /usr/lib64/dovecot/lib02_imap_acl_plugin.so...(no > > debugging symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib02_imap_acl_plugin.so > > Reading symbols from /usr/lib64/dovecot/lib15_notify_plugin.so...(no > > debugging symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib15_notify_plugin.so > > Reading symbols from /usr/lib64/dovecot/lib20_mail_log_plugin.so...(no > > debugging symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib20_mail_log_plugin.so > > Reading symbols from /usr/lib64/dovecot/lib20_zlib_plugin.so...(no debugging > > symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib20_zlib_plugin.so > > Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done. > > Loaded symbols for /lib64/libz.so.1 > > Reading symbols from /lib64/libbz2.so.1...(no debugging symbols > > found)...done. > > Loaded symbols for /lib64/libbz2.so.1 > > Reading symbols from /usr/lib64/dovecot/lib30_imap_zlib_plugin.so...(no > > debugging symbols found)...done. > > Loaded symbols for /usr/lib64/dovecot/lib30_imap_zlib_plugin.so > > Core was generated by `dovecot/imap'. > > Program terminated with signal 6, Aborted. > > #0 0x00007f73f1386495 in raise () from /lib64/libc.so.6 > > --- snip --- > > > > I searched for that error message but only found some entries regarding > > older dovecot versions and setting "mail_process_size" but i couldn't > > find anything regarding Dovecot Version 2.3. Maybe it's something that is > > fixed already but if so i can't find it. Or is this a configuration issue or > > a bug? > > > > Here my Dovecot configuration: > > > > --- snip --- > > # 2.3.0 (c8b89eb): /etc/dovecot/dovecot.conf > > # Pigeonhole version 0.5.0.1 (d33dca20) > > # OS: Linux 2.6.32-696.3.1.el6.x86_64 x86_64 CentOS release 6.9 (Final) ext4 > > auth_debug = yes > > auth_debug_passwords = yes > > auth_master_user_separator = * > > auth_mechanisms = plain login > > auth_verbose = yes > > disable_plaintext_auth = no > > doveadm_password = # hidden, use -P to show it > > doveadm_port = 12345 > > imap_max_line_length = 2 M > > mail_debug = yes > > mail_location = maildir:/export/home/imap/%Lu/Maildir > > mail_plugins = acl zlib mail_log notify > > mailbox_idle_check_interval = 10 secs > > 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 > > namespace { > > hidden = no > > ignore_on_failure = no > > inbox = no > > list = children > > location = maildir:%%h/Maildir:INDEXPVT=%h/shared/%%u > > prefix = shared/%%u/ > > separator = / > > subscriptions = yes > > type = shared > > } > > namespace inbox { > > hidden = no > > inbox = yes > > list = 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 = INBOX/ > > separator = / > > type = private > > } > > passdb { > > args = /etc/dovecot/master-users > > driver = passwd-file > > master = yes > > } > > passdb { > > args = /etc/dovecot/dovecot-ldap.conf.ext > > driver = ldap > > } > > plugin { > > acl = vfile:/etc/dovecot/global-acls:cache_secs=300 > > acl_shared_dict = file:/export/home/shared-db/shared-mailboxes > > mail_log_events = append delete undelete expunge copy mailbox_delete > > mailbox_rename flag_change > > mail_log_fields = uid box msgid size from flags > > mail_replica = tcp:mail2.tutech.de > > sieve = ~/.dovecot.sieve > > sieve_dir = ~/sieve > > sieve_global = /var/lib/dovecot/sieve/global/ > > sieve_user_log = ~/.dovecot.sieve.log > > zlib_save = gz > > zlib_save_level = 6 > > } > > protocols = imap pop3 lmtp sieve sieve > > service aggregator { > > fifo_listener replication-notify-fifo { > > mode = 0666 > > user = vmail > > } > > unix_listener replication-notify { > > mode = 0666 > > user = vmail > > } > > } > > service auth { > > unix_listener /var/spool/postfix/private/auth { > > mode = 0666 > > } > > unix_listener auth-userdb { > > group = vmail > > mode = 0660 > > user = vmail > > } > > } > > service config { > > unix_listener config { > > user = vmail > > } > > } > > service doveadm { > > inet_listener { > > port = 12345 > > } > > user = vmail > > } > > service imap-login { > > inet_listener imaps { > > port = 993 > > ssl = yes > > } > > process_limit = 500 > > process_min_avail = 20 > > } > > service imap { > > executable = imap > > } > > service lmtp { > > inet_listener lmtp { > > address = 127.0.0.1 > > port = 24 > > } > > } > > service managesieve-login { > > inet_listener sieve { > > port = 4190 > > } > > inet_listener sieve_deprecated { > > port = 2000 > > } > > } > > service pop3-login { > > inet_listener pop3s { > > port = 995 > > ssl = yes > > } > > } > > service pop3 { > > executable = pop3 > > } > > service replicator { > > unix_listener replicator-doveadm { > > mode = 0666 > > } > > } > > ssl = required > > ssl_cert = </etc/pki/dovecot/certs/mail.tutech.de.crt_chain > > ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!EXPORT > > ssl_dh = # hidden, use -P to show it > > ssl_key = # hidden, use -P to show it > > syslog_facility = local6 > > userdb { > > args = /etc/dovecot/dovecot-ldap-userdb.conf.ext > > driver = ldap > > } > > protocol lmtp { > > mail_plugins = acl zlib mail_log notify sieve > > } > > protocol imap { > > mail_max_userip_connections = 100 > > mail_plugins = acl zlib mail_log notify imap_zlib imap_acl > > rawlog_dir = /tmp/rawlog/%u > > } > > --- snip --- > > > > > > Thanks for the help! > > > > Kind regards > > Thomas > > > > -- > Bad pun of the week: The formula 1 control computer suffered from a race > condition -- C is quirky, flawed, and an enormous success. - Dennis M. Ritchie.
