rawlog segfaults (error 4 in libdovecot.so.0.0.0)
Hello everybody,
i tried to debug imap sessions with the rawlog feature and rawlog creates files but when i try to dump them doveadm tells me [...] Error: zlib.read((file)): unexpected EOF at [...]. I looked at syslog files and i see, that rawlog gets terminated with a segfault, e.g.:
segfault at 10 ip 00007ff6da362596 sp 00007fffe725a080 error 4 in libdovecot.so.0.0.0[7ff6da2a4000+122000]
Is there a way to debug why rawlog ist terminated? I haven't found anything.I would be very thankful, if somebody could give a hint.
My system is:
# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # 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 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 mailbox_list_index = yes 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/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 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 service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } process_limit = 500 process_min_avail = 20 } service imap { executable = imap postlogin } 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 postlogin } service postlogin { executable = script-login -d rawlog -f in } ssl = required ssl_cert = </etc/pki/dovecot/certs/mail.tutech.de.crt_chain ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!EXPORT ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv3 !SSLv2 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 }
Tia Thomas
rawlog files are plain text, readable files. you do not need to dump them with doveadm. can you get gdb "bt full" for the core file?
Aki
On 10.11.2017 11:35, T. Robers wrote:
Hello everybody,
i tried to debug imap sessions with the rawlog feature and rawlog creates files but when i try to dump them doveadm tells me [...] Error: zlib.read((file)): unexpected EOF at [...]. I looked at syslog files and i see, that rawlog gets terminated with a segfault, e.g.:
segfault at 10 ip 00007ff6da362596 sp 00007fffe725a080 error 4 in libdovecot.so.0.0.0[7ff6da2a4000+122000]
Is there a way to debug why rawlog ist terminated? I haven't found anything.I would be very thankful, if somebody could give a hint.
My system is:
# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # 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 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 mailbox_list_index = yes 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/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 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 service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } process_limit = 500 process_min_avail = 20 } service imap { executable = imap postlogin } 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 postlogin } service postlogin { executable = script-login -d rawlog -f in } ssl = required ssl_cert = </etc/pki/dovecot/certs/mail.tutech.de.crt_chain ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!EXPORT ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv3 !SSLv2 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 }
Tia Thomas
Am 10.11.2017 um 11:19 schrieb Aki Tuomi:
rawlog files are plain text, readable files. you do not need to dump them with doveadm.
but the file command says
file 20171110-101523-29744.in 20171110-101523-29744.in: data
and less [...] may be a binary file. See it anyway? [...] When i do doveadm dump 20171110-101523-29744.in i get
Detected file type: imapzlib 2 COMPRESS DEFLATE 3 ID ("name" "Thunderbird" "version" "52.4.0") 4 list (subscribed) "" "INBOX/*" 5 list (subscribed) "" "shared/*" Error: zlib.read((file)): unexpected EOF at 137
can you get gdb "bt full" for the core file?
gdb /usr/libexec/dovecot/rawlog /var/core/12802 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/rawlog...(no debugging symbols found)...done. [New Thread 12802] Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...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/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/librt.so.1 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 Core was generated by `/usr/libexec/dovecot/rawlog [robers@tutech.de:12801 rawlog] �������'. Program terminated with signal 11, Segmentation fault. #0 o_stream_flush (stream=0x0) at ostream.c:175 175 ostream.c: Datei oder Verzeichnis nicht gefunden. in ostream.c Missing separate debuginfos, use: debuginfo-install dovecot22-2.2.33.2-1.gf.el6.x86_64 (gdb) bt full #0 o_stream_flush (stream=0x0) at ostream.c:175 _stream = <value optimized out> ret = <value optimized out> __FUNCTION__ = "o_stream_flush" #1 0x0000000000401c35 in proxy_flush_timeout () No symbol table info available. #2 0x00007fbed5387e0a in io_loop_handle_timeouts_real (ioloop=0x1bef760) at ioloop.c:568 timeout = 0x1bf0a80 item = 0x1bf0a80 tv = {tv_sec = 0, tv_usec = 0} tv_call = {tv_sec = 1510312817, tv_usec = 931447} t_id = 3 #3 io_loop_handle_timeouts (ioloop=0x1bef760) at ioloop.c:581 _data_stack_cur_id = 2 #4 0x00007fbed5389357 in io_loop_handler_run_internal (ioloop=0x1bef760) at ioloop-epoll.c:196 ctx = 0x1befbf0 events = <value optimized out> event = <value optimized out> list = <value optimized out> io = <value optimized out> tv = {tv_sec = 0, tv_usec = 991646} events_count = <value optimized out> msecs = <value optimized out> ret = 0 i = <value optimized out> call = <value optimized out> __FUNCTION__ = "io_loop_handler_run_internal" #5 0x00007fbed53877ac in io_loop_handler_run (ioloop=0x1bef760) at ioloop.c:649 No locals. #6 0x00007fbed5387968 in io_loop_run (ioloop=0x1bef760) at ioloop.c:624 __FUNCTION__ = "io_loop_run" #7 0x0000000000402896 in main () No symbol table info available.
Do i need to install the debuginfo packet?
Aki
Thanks Thomas
On 10.11.2017 11:35, T. Robers wrote:
Hello everybody,
i tried to debug imap sessions with the rawlog feature and rawlog creates files but when i try to dump them doveadm tells me [...] Error: zlib.read((file)): unexpected EOF at [...]. I looked at syslog files and i see, that rawlog gets terminated with a segfault, e.g.:
segfault at 10 ip 00007ff6da362596 sp 00007fffe725a080 error 4 in libdovecot.so.0.0.0[7ff6da2a4000+122000]
Is there a way to debug why rawlog ist terminated? I haven't found anything.I would be very thankful, if somebody could give a hint.
My system is:
# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # 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 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 mailbox_list_index = yes 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/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 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 service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } process_limit = 500 process_min_avail = 20 } service imap { executable = imap postlogin } 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 postlogin } service postlogin { executable = script-login -d rawlog -f in } ssl = required ssl_cert = </etc/pki/dovecot/certs/mail.tutech.de.crt_chain ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!EXPORT ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv3 !SSLv2 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 }
Tia Thomas
-- TuTech Innovation GmbH Thomas Robers Diplom-Chemieingenieur (FH) IT & Technischer Support IT-Administrator Harburger Schlossstrasse 6-12 21079 Hamburg, Germany Tel.: +49 40 76629-6720, Fax: +49 40 76629-6729 mailto:robers@tutech.de Web: http://www.tutech.de Public Key (PGP): http://keys.tutech.net/tro
Geschaeftsfuehrer: Martin Mahn Handelsregister: HRB 51682 Hamburg USt.-ID-Nr.: DE 811 481 083
It seems, it has to do with zlib plugin because a on test machine without zlib plugin activted it works without segmentation fault and i can read the log files written by rawlog.
Does anybody has a suggestion on what could be the problem? Compiling resp. building the rpm worked without error and dovecot works with zlib plugin activated. No other segfaults.
Tia Thomas
Am 10.11.2017 um 11:19 schrieb Aki Tuomi:
rawlog files are plain text, readable files. you do not need to dump them with doveadm. can you get gdb "bt full" for the core file?
Aki
On 10.11.2017 11:35, T. Robers wrote:
Hello everybody,
i tried to debug imap sessions with the rawlog feature and rawlog creates files but when i try to dump them doveadm tells me [...] Error: zlib.read((file)): unexpected EOF at [...]. I looked at syslog files and i see, that rawlog gets terminated with a segfault, e.g.:
segfault at 10 ip 00007ff6da362596 sp 00007fffe725a080 error 4 in libdovecot.so.0.0.0[7ff6da2a4000+122000]
Is there a way to debug why rawlog ist terminated? I haven't found anything.I would be very thankful, if somebody could give a hint.
My system is:
# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.21 (92477967) # 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 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 mailbox_list_index = yes 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/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 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 service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service imap-login { inet_listener imap { port = 143 } inet_listener imaps { port = 993 ssl = yes } process_limit = 500 process_min_avail = 20 } service imap { executable = imap postlogin } 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 postlogin } service postlogin { executable = script-login -d rawlog -f in } ssl = required ssl_cert = </etc/pki/dovecot/certs/mail.tutech.de.crt_chain ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!EXPORT ssl_key = # hidden, use -P to show it ssl_protocols = !SSLv3 !SSLv2 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 }
Tia Thomas
participants (4)
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Aki Tuomi
-
T. Robers
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T.Robers＠smtp.tutech.de
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Thomas Robers - TUTECH