Hi,

after upgrade to dovecot 2.2.31 (ee) some users (very few) have problem to see, via IMAP, their folders after login. The error in the log is simple master: service(imap): child 15528 killed with signal 11 (core dumped). The user see only the INBOX folder. We are using Director and NFS.

Below my configuration and the backtrace.

Thanks

# dovecot -n # 2.2.31 (65cde28): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.19.rc1 (e5c7051) # OS: Linux 2.6.32-696.3.2.el6.x86_64 x86_64 CentOS release 6.9 (Final) auth_cache_negative_ttl = 2 mins auth_cache_size = 20 M auth_cache_ttl = 20 mins auth_master_user_separator = * auth_mechanisms = plain login auth_worker_max_count = 50 default_vsz_limit = 384 M deliver_log_format = msgid=%m, from=%f, subject="%s": %$ dict { acl = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext expire = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no first_valid_gid = 89 first_valid_uid = 89 imap_client_workarounds = delay-newmail tb-extra-mailbox-sep tb-lsub-flags imap_idle_notify_interval = 29 mins imap_logout_format = in=%i out=%o session=<%{session}> imap_max_line_length = 2 M last_valid_gid = 89 last_valid_uid = 89 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes listen = 10.1.3.157 login_trusted_networks = 10.1.3.0/24 192.168.12.128/25 192.168.216.0/22 mail_fsync = always mail_location = maildir:~/Maildir mail_plugins = quota acl expire zlib fts fts_solr maildir_very_dirty_syncs = yes managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext vnd.dovecot.duplicate mmap_disable = yes namespace { list = children location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u prefix = shared/%%n/ separator = / subscriptions = no type = shared } namespace inbox { inbox = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Spam { auto = subscribe special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / } passdb { args = /etc/dovecot/dovecot-deny-sql.conf.ext deny = yes driver = sql } passdb { args = /etc/dovecot/extra/master-users driver = passwd-file master = yes pass = yes } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql result_success = continue-ok } passdb { args = /etc/dovecot/extra/extrafields-passdb driver = passwd-file result_internalfail = return-fail skip = unauthenticated } plugin { acl = vfile acl_shared_dict = proxy::acl expire = Trash expire2 = Spam expire_dict = proxy::expire fts = solr fts_solr = url=http://10.1.3.145:8983/solr/doveindex/ quota = maildir:UserQuota quota2 = dict:Quota Usage::noenforcing:proxy::sqlquota quota_grace = 10M quota_rule2 = Trash:storage=+100M quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_before = /etc/dovecot/sieve/before.sieve sieve_dir = ~/sieve sieve_extensions = +vnd.dovecot.duplicate -vacation zlib_save = gz zlib_save_level = 6 } pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s, bytes=%i/%o, session=<%{session}> protocols = imap pop3 sieve sendmail_path = /var/qmail/bin/sendmail service auth { client_limit = 6524 unix_listener auth-userdb { group = vchkpw mode = 0660 user = vmail } } service dict { process_limit = 500 unix_listener dict { group = vchkpw mode = 0660 user = vmail } } service imap-login { process_min_avail = 4 service_count = 0 } service imap-postlogin { executable = script-login /etc/dovecot/scripts/imap-postlogin.sh unix_listener imap-postlogin { group = vchkpw mode = 0660 user = vmail } user = vmail } service imap { executable = imap imap-postlogin process_limit = 6000 vsz_limit = 512 M } service managesieve-login { inet_listener sieve { port = 4190 } } service pop3-login { process_min_avail = 4 service_count = 0 } service pop3-postlogin { executable = script-login /etc/dovecot/scripts/pop3-postlogin.sh unix_listener pop3-postlogin { group = vchkpw mode = 0660 user = vmail } user = vmail } service pop3 { executable = pop3 pop3-postlogin } service quota-warning { executable = script /etc/dovecot/scripts/quota-warning.sh unix_listener quota-warning { user = vmail } user = vmail } ssl = no submission_host = 127.0.0.1 userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lda { mail_fsync = optimized mail_location = maildir:~/Maildir:INDEX=MEMORY mail_plugins = quota acl expire zlib fts fts_solr sieve } protocol imap { mail_max_userip_connections = 50 mail_plugins = quota acl expire zlib fts fts_solr imap_quota imap_acl imap_zlib } protocol sieve { mail_max_userip_connections = 2 } protocol pop3 { mail_max_userip_connections = 15 }

==== Fatal: imap(myuser@mydomain.it): master: service(imap): child 15528 killed with signal 11 (core dumped)

# gdb /usr/libexec/dovecot/imap /home/vmail/domains/mydomain.it/myuser/core.9739 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...Reading symbols from /usr/lib/debug/usr/libexec/dovecot/imap.debug...done. done. [New Thread 9739] Reading symbols from /usr/lib64/dovecot/libdovecot-lda.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-lda.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-lda.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot-storage.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-storage.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-storage.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot.so.0.0.0.debug...done. 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...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib01_acl_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib01_acl_plugin.so Reading symbols from /usr/lib64/dovecot/lib02_imap_acl_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib02_imap_acl_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib02_imap_acl_plugin.so Reading symbols from /usr/lib64/dovecot/lib10_quota_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib10_quota_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib10_quota_plugin.so Reading symbols from /usr/lib64/dovecot/lib11_imap_quota_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib11_imap_quota_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib11_imap_quota_plugin.so Reading symbols from /usr/lib64/dovecot/lib20_expire_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_expire_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib20_expire_plugin.so Reading symbols from /usr/lib64/dovecot/lib20_fts_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_fts_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib20_fts_plugin.so Reading symbols from /usr/lib64/libicui18n.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicui18n.so.56 Reading symbols from /usr/lib64/libicuuc.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicuuc.so.56 Reading symbols from /usr/lib64/libicudata.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicudata.so.56 Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libstdc++.so.6 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libm.so.6 Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libgcc_s.so.1 Reading symbols from /usr/lib64/dovecot/lib20_zlib_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_zlib_plugin.so.debug...done. 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/lib21_fts_solr_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib21_fts_solr_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib21_fts_solr_plugin.so Reading symbols from /lib64/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libexpat.so.1 Reading symbols from /usr/lib64/dovecot/lib30_imap_zlib_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib30_imap_zlib_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib30_imap_zlib_plugin.so Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libnss_files.so.2 Core was generated by `dovecot/imap [myuser@abytaim'. Program terminated with signal 11, Segmentation fault. #0 fts_backend_deinit (_backend=0xd67ef8) at fts-api.c:84 84 backend->v.deinit(backend); Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.5-7.el6_0.x86_64 expat-2.0.1-13.el6_8.x86_64 glibc-2.12-1.209.el6_9.2.x86_64 libgcc-4.4.7-18.el6.x86_64 libicu56-56.1-4.1.x86_64 libstdc++-4.4.7-18.el6.x86_64 zlib-1.2.3-29.el6.x86_64 (gdb) bt full #0 fts_backend_deinit (_backend=0xd67ef8) at fts-api.c:84 backend = 0x0 #1 0x00007f168263a8de in fts_mailbox_list_deinit (list=0xd678e8) at fts-storage.c:833 flist = 0xd67e28 #2 0x00007f1683ff705a in mail_namespace_free (ns=0xd69780) at mail-namespace.c:62 storagep = <value optimized out> #3 0x00007f1683ff8045 in mail_namespaces_init_location (user=0xd712f0, location=<value optimized out>, error_r=0x7ffd248bc8d0) at mail-namespace.c:514 inbox_set = 0xd72110 unexpanded_inbox_set = 0xd72170 ns = 0xd69780 mail_set = <value optimized out> error = 0xd323c0 "mkdir(/var/run/dovecot/user-not-found/myuser2@mydomain.it) failed: Permission denied (euid=89(vmail) egid=89(vchkpw) missing +w perm: /var/run/dovecot, dir owned by 0:97 mode=0755)" driver = 0x0 location_source = 0x7f16840ad670 "mail_location parameter" default_location = <value optimized out> ret = <value optimized out> __FUNCTION__ = "mail_namespaces_init_location" #4 0x00007f1684012e9e in shared_storage_get_namespace (_ns=0x7ffd248bc948, _name=0x7ffd248bc940) at shared-storage.c:328 _storage = 0xd60fd8 list = 0xd607c8 storage = 0xd60fd8 user = 0xd554f8 static_tab = {{key = 117 'u', value = 0x0, long_key = 0x7f16840bda70 "user"}, {key = 110 'n', value = 0x0, long_key = 0x7f16840b092a "username"}, {key = 100 'd', value = 0x0, long_key = 0x7f16840b0938 "domain"}, { key = 104 'h', value = 0x0, long_key = 0x7f16840b06e4 "home"}, {key = 0 '\000', value = 0x0, long_key = 0x0}} tab = <value optimized out> new_ns = 0xd69960 ns = 0xd60660 ns_set = 0xd564f8 unexpanded_ns_set = <value optimized out> owner = 0xd712f0 domain = 0xd55607 "mydomain.it" username = 0xd315f0 "myuser2" userdomain = 0xd31600 "myuser2@mydomain.it" name = 0xd6f183 "INBOX" p = <value optimized out> next = <value optimized out> dest = <value optimized out> error = <value optimized out> prefix = 0xd320e8 ---Type <return> to continue, or q <return> to quit--- location = 0xd320e8 ns_sep = 47 '/' ret = <value optimized out> #5 0x00007f1684012421 in shared_list_join_refpattern (list=<value optimized out>, ref=0xd6f172 "shared/myuser2/INBOX", pattern=0x7f16840b4536 "") at shared-list.c:102 ns = 0x0 ns_ref = 0xd6f179 "myuser2/INBOX" prefix = 0xd60700 "shared/" prefix_len = <value optimized out> #6 0x00007f1684067c43 in mailbox_list_subscription_fill_one (src_list=0xd5e598, dest_list=0xd607c8) at mailbox-list-subscriptions.c:68 ns = 0xd60660 namespaces = <value optimized out> vname = <value optimized out> ns_name = 0xd6f172 "shared/myuser2/INBOX" node = <value optimized out> created = false default_ns = 0xd60660 error = 0x7f1684517c55 "I\211\303L\213L$0L\213D$(H\213|$ H\213t$\030H\213T$\020H\213L$\bH\213\004$H\203\304HA\377\343ffffff.\017\037\204" len = <value optimized out> #7 mailbox_list_subscriptions_refresh (src_list=0xd5e598, dest_list=0xd607c8) at mailbox-list-subscriptions.c:159 _data_stack_cur_id = 6 _data_stack_cur_id = 5 subsfile_ctx = 0xd6b930 st = {st_dev = 21, st_ino = 88027185, st_nlink = 1, st_mode = 33152, st_uid = 89, st_gid = 89, __pad0 = 0, st_rdev = 0, st_size = 123, st_blksize = 65536, st_blocks = 8, st_atim = {tv_sec = 1492836107, tv_nsec = 0}, st_mtim = { tv_sec = 1486382417, tv_nsec = 0}, st_ctim = {tv_sec = 1492836107, tv_nsec = 361387000}, __unused = {0, 0, 0}} type = <value optimized out> path = 0xd315a0 "/home/vmail/domains/mydomain.it/myuser/Maildir/subscriptions" name = 0xd6f172 "shared/myuser2/INBOX" sep = <value optimized out> __FUNCTION__ = "mailbox_list_subscriptions_refresh" #8 0x00007f1684064861 in mailbox_list_iter_init_multiple (list=0xd607c8, patterns=<value optimized out>, flags=8448) at mailbox-list-iter.c:160 ctx = <value optimized out> __FUNCTION__ = "mailbox_list_iter_init_multiple" #9 0x00007f16840652e7 in mailbox_list_ns_iter_try_next (_ctx=0xd64cc8) at mailbox-list-iter.c:591 ctx = 0xd64cc8 info = <value optimized out> ns = <value optimized out> #10 mailbox_list_ns_iter_next (_ctx=0xd64cc8) at mailbox-list-iter.c:658 ---Type <return> to continue, or q <return> to quit--- info = <value optimized out> #11 0x00007f1684064348 in mailbox_list_iter_next_call (ctx=0xd64cc8) at mailbox-list-iter.c:985 info = <value optimized out> set = <value optimized out> #12 mailbox_list_iter_next (ctx=0xd64cc8) at mailbox-list-iter.c:1053 _data_stack_cur_id = 4 info = <value optimized out> #13 0x000000000041115f in cmd_list_continue (cmd=0xd5bc78) at cmd-list.c:229 ctx = 0xd5be20 info = <value optimized out> flags = <value optimized out> str = 0xd31388 mutf7_name = 0xd314e0 name = <value optimized out> ret = <value optimized out> #14 0x000000000041190e in cmd_list_full (cmd=0xd5bc78, lsub=<value optimized out>) at cmd-list.c:468 client = <value optimized out> args = 0xd3fcc0 list_args = 0xd3fdd0 arg_count = 41 ctx = 0xd5be20 patterns = {arr = {buffer = 0xd5be60, element_size = 8}, v = 0xd5be60, v_modifiable = 0xd5be60} ref = 0xd5be50 "" pattern = 0xd5be58 "*" patterns_strarr = <value optimized out> str = <value optimized out> #15 0x000000000041a89d in command_exec (cmd=0xd5bc78) at imap-commands.c:200 hook = 0xd3a370 finished = <value optimized out> __FUNCTION__ = "command_exec" #16 0x00000000004188d0 in client_command_input (cmd=0xd5bc78) at imap-client.c:1080 client = 0xd59508 command = <value optimized out> __FUNCTION__ = "client_command_input" #17 0x0000000000418966 in client_command_input (cmd=0xd5bc78) at imap-client.c:1140 client = 0xd59508 command = <value optimized out> __FUNCTION__ = "client_command_input" #18 0x0000000000418ca5 in client_handle_next_command (client=0xd59508) at imap-client.c:1182 No locals. #19 client_handle_input (client=0xd59508) at imap-client.c:1194 _data_stack_cur_id = 3 ---Type <return> to continue, or q <return> to quit--- ret = 176 remove_io = false handled_commands = false __FUNCTION__ = "client_handle_input" #20 0x000000000041914f in client_input (client=0xd59508) at imap-client.c:1241 cmd = <value optimized out> output = 0xd5ba60 bytes = 32 __FUNCTION__ = "client_input" #21 0x00007f1683d40f01 in io_loop_call_io (io=0xd5bb50) at ioloop.c:599 ioloop = 0xd399a0 t_id = 2 __FUNCTION__ = "io_loop_call_io" #22 0x00007f1683d42b1f in io_loop_handler_run_internal (ioloop=<value optimized out>) at ioloop-epoll.c:223 ctx = 0xd3b4c0 events = <value optimized out> event = 0xd3c330 list = 0xd5bbb0 io = <value optimized out> tv = {tv_sec = 1799, tv_usec = 999269} events_count = <value optimized out> msecs = <value optimized out> ret = 1 i = <value optimized out> call = <value optimized out> __FUNCTION__ = "io_loop_handler_run_internal" #23 0x00007f1683d40fbc in io_loop_handler_run (ioloop=0xd399a0) at ioloop.c:648 No locals. #24 0x00007f1683d41178 in io_loop_run (ioloop=0xd399a0) at ioloop.c:623 __FUNCTION__ = "io_loop_run" #25 0x00007f1683cc96f3 in master_service_run (service=0xd39840, callback=<value optimized out>) at master-service.c:666 No locals. #26 0x0000000000426525 in main (argc=2, argv=0xd395e0) at main.c:491 set_roots = {0x42f280, 0x637a40, 0x0} login_set = {auth_socket_path = 0xd31050 "\210\020", <incomplete sequence \323>, postlogin_socket_path = 0xd31088 "[myuser@mydomain.it 192.168.12.215 LIST]", postlogin_timeout_secs = 60, callback = 0x426680 <login_client_connected>, failure_callback = 0x425dd0 <login_client_failed>, request_auth_token = 1} service_flags = <value optimized out> storage_service_flags = <value optimized out> username = <value optimized out> auth_socket_path = 0x430284 "auth-master" c = <value optimized out> (gdb)

==== Fatal: imap(myuser@mydomain.eu): master: service(imap): child 15528 killed with signal 11 (core dumped)

# gdb /usr/libexec/dovecot/imap /home/vmail/domains/mydomain.eu/myuser/core.6641 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...Reading symbols from /usr/lib/debug/usr/libexec/dovecot/imap.debug...done. done. [New Thread 6641] Reading symbols from /usr/lib64/dovecot/libdovecot-lda.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-lda.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-lda.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot-storage.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot-storage.so.0.0.0.debug...done. done. Loaded symbols for /usr/lib64/dovecot/libdovecot-storage.so.0 Reading symbols from /usr/lib64/dovecot/libdovecot.so.0...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/libdovecot.so.0.0.0.debug...done. 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...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib01_acl_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib01_acl_plugin.so Reading symbols from /usr/lib64/dovecot/lib02_imap_acl_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib02_imap_acl_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib02_imap_acl_plugin.so Reading symbols from /usr/lib64/dovecot/lib10_quota_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib10_quota_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib10_quota_plugin.so Reading symbols from /usr/lib64/dovecot/lib11_imap_quota_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib11_imap_quota_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib11_imap_quota_plugin.so Reading symbols from /usr/lib64/dovecot/lib20_expire_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_expire_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib20_expire_plugin.so Reading symbols from /usr/lib64/dovecot/lib20_fts_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_fts_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib20_fts_plugin.so Reading symbols from /usr/lib64/libicui18n.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicui18n.so.56 Reading symbols from /usr/lib64/libicuuc.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicuuc.so.56 Reading symbols from /usr/lib64/libicudata.so.56...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libicudata.so.56 Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libstdc++.so.6 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libm.so.6 Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libgcc_s.so.1 Reading symbols from /usr/lib64/dovecot/lib20_zlib_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib20_zlib_plugin.so.debug...done. 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/lib21_fts_solr_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib21_fts_solr_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib21_fts_solr_plugin.so Reading symbols from /lib64/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libexpat.so.1 Reading symbols from /usr/lib64/dovecot/lib30_imap_zlib_plugin.so...Reading symbols from /usr/lib/debug/usr/lib64/dovecot/lib30_imap_zlib_plugin.so.debug...done. done. Loaded symbols for /usr/lib64/dovecot/lib30_imap_zlib_plugin.so Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libnss_files.so.2 Core was generated by `dovecot/imap [myuser'. Program terminated with signal 11, Segmentation fault. #0 fts_backend_deinit (_backend=0xbfaaf8) at fts-api.c:84 84 backend->v.deinit(backend); Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.5-7.el6_0.x86_64 expat-2.0.1-13.el6_8.x86_64 glibc-2.12-1.209.el6_9.2.x86_64 libgcc-4.4.7-18.el6.x86_64 libicu56-56.1-4.1.x86_64 libstdc++-4.4.7-18.el6.x86_64 zlib-1.2.3-29.el6.x86_64 (gdb) bt full #0 fts_backend_deinit (_backend=0xbfaaf8) at fts-api.c:84 backend = 0x0 #1 0x00007f9cad42d8de in fts_mailbox_list_deinit (list=0xbfa4e8) at fts-storage.c:833 flist = 0xbfaa28 #2 0x00007f9caedea05a in mail_namespace_free (ns=0xbfbcf0) at mail-namespace.c:62 storagep = <value optimized out> #3 0x00007f9caedeb045 in mail_namespaces_init_location (user=0xbfe980, location=<value optimized out>, error_r=0x7fff170e1e80) at mail-namespace.c:514 inbox_set = 0xbff790 unexpanded_inbox_set = 0xbff7f0 ns = 0xbfbcf0 mail_set = <value optimized out> error = 0xbc29e8 "mkdir(/var/run/dovecot/user-not-found/myuser2@mydomain.eu) failed: Permission denied (euid=89(vmail) egid=89(vchkpw) missing +w perm: /var/run/dovecot, dir owned by 0:97 mode=0755)" driver = 0x0 location_source = 0x7f9caeea0670 "mail_location parameter" default_location = <value optimized out> ret = <value optimized out> __FUNCTION__ = "mail_namespaces_init_location" #4 0x00007f9caee05e9e in shared_storage_get_namespace (_ns=0x7fff170e1f38, _name=0x7fff170e1f28) at shared-storage.c:328 _storage = 0xbf0fd8 list = 0xbf07c8 storage = 0xbf0fd8 user = 0xbe54f8 static_tab = {{key = 117 'u', value = 0x0, long_key = 0x7f9caeeb0a70 "user"}, {key = 110 'n', value = 0x0, long_key = 0x7f9caeea392a "username"}, {key = 100 'd', value = 0x0, long_key = 0x7f9caeea3938 "domain"}, { key = 104 'h', value = 0x0, long_key = 0x7f9caeea36e4 "home"}, {key = 0 '\000', value = 0x0, long_key = 0x0}} tab = <value optimized out> new_ns = 0xbfbbd0 ns = 0xbf0660 ns_set = 0xbe6510 unexpanded_ns_set = <value optimized out> owner = 0xbfe980 domain = 0xbe560f "mydomain.eu" username = 0xbc1c18 "myuser2" userdomain = 0xbc1c28 "myuser2@mydomain.eu" name = 0xbc1b99 "" p = <value optimized out> next = <value optimized out> dest = <value optimized out> error = <value optimized out> prefix = 0xbc2710 location = 0xbc2710 ns_sep = 47 '/' ret = <value optimized out> #5 0x00007f9cadec1dae in acl_shared_namespace_add (ns=0xbf0660) at acl-shared-storage.c:67 sstorage = 0xbf0fd8 new_ns = 0x0 tab = 0xbc1ad0 iter = 0xbc17d0 info = <value optimized out> str = <value optimized out> static_tab = {{key = 117 'u', value = 0x0, long_key = 0x7f9cadec310e "user"}, {key = 110 'n', value = 0x0, long_key = 0x7f9cadec30d1 "username"}, {key = 100 'd', value = 0x0, long_key = 0x7f9cadec30da "domain"}, { key = 0 '\000', value = 0x0, long_key = 0x0}} p = 0xbf5890 "@mydomain.eu" mailbox = 0xbc1b90 "myuser2/" #6 acl_shared_namespaces_add (ns=0xbf0660) at acl-shared-storage.c:103 _data_stack_cur_id = 5 auser = <value optimized out> alist = <value optimized out> storage = 0xbf0fd8 iter = 0xbf50d8 name = 0xbf5888 "myuser2@mydomain.eu" __FUNCTION__ = "acl_shared_namespaces_add" #7 0x00007f9cadec0b30 in acl_mailbox_list_iter_init_shared (list=0xbf07c8, patterns=0xbf4fb8, flags=49152) at acl-mailbox-list.c:155 alist = 0xbf0a78 ctx = 0xbfaaf8 ret = <value optimized out> #8 0x00007f9caee57820 in mailbox_list_iter_init_multiple (list=0xbf07c8, patterns=<value optimized out>, flags=49152) at mailbox-list-iter.c:164 ctx = <value optimized out> __FUNCTION__ = "mailbox_list_iter_init_multiple" #9 0x00007f9caee582e7 in mailbox_list_ns_iter_try_next (_ctx=0xbf4cc8) at mailbox-list-iter.c:591 ---Type <return> to continue, or q <return> to quit--- ctx = 0xbf4cc8 info = <value optimized out> ns = <value optimized out> #10 mailbox_list_ns_iter_next (_ctx=0xbf4cc8) at mailbox-list-iter.c:658 info = <value optimized out> #11 0x00007f9caee57348 in mailbox_list_iter_next_call (ctx=0xbf4cc8) at mailbox-list-iter.c:985 info = <value optimized out> set = <value optimized out> #12 mailbox_list_iter_next (ctx=0xbf4cc8) at mailbox-list-iter.c:1053 _data_stack_cur_id = 4 info = <value optimized out> #13 0x000000000041115f in cmd_list_continue (cmd=0xbebc78) at cmd-list.c:229 ctx = 0xbebe00 info = <value optimized out> flags = <value optimized out> str = 0xbc1598 mutf7_name = 0xbc16f0 name = <value optimized out> ret = <value optimized out> #14 0x000000000041190e in cmd_list_full (cmd=0xbebc78, lsub=<value optimized out>) at cmd-list.c:468 client = <value optimized out> args = 0xbcfc90 list_args = 0x0 arg_count = 41 ctx = 0xbebe00 patterns = {arr = {buffer = 0xbebe40, element_size = 8}, v = 0xbebe40, v_modifiable = 0xbebe40} ref = 0xbebe30 "" pattern = 0xbebe38 "*" patterns_strarr = <value optimized out> str = <value optimized out> #15 0x000000000041a89d in command_exec (cmd=0xbebc78) at imap-commands.c:200 hook = 0xbca370 finished = <value optimized out> __FUNCTION__ = "command_exec" #16 0x00000000004188d0 in client_command_input (cmd=0xbebc78) at imap-client.c:1080 client = 0xbe9508 command = <value optimized out> __FUNCTION__ = "client_command_input" #17 0x0000000000418966 in client_command_input (cmd=0xbebc78) at imap-client.c:1140 client = 0xbe9508 command = <value optimized out> __FUNCTION__ = "client_command_input" #18 0x0000000000418ca5 in client_handle_next_command (client=0xbe9508) at imap-client.c:1182 No locals. #19 client_handle_input (client=0xbe9508) at imap-client.c:1194 _data_stack_cur_id = 3 ret = 176 remove_io = false handled_commands = false __FUNCTION__ = "client_handle_input" #20 0x000000000041914f in client_input (client=0xbe9508) at imap-client.c:1241 cmd = <value optimized out> output = 0xbeba60 bytes = 15 __FUNCTION__ = "client_input" #21 0x00007f9caeb33f01 in io_loop_call_io (io=0xbebb50) at ioloop.c:599 ioloop = 0xbc99a0 t_id = 2 __FUNCTION__ = "io_loop_call_io" #22 0x00007f9caeb35b1f in io_loop_handler_run_internal (ioloop=<value optimized out>) at ioloop-epoll.c:223 ctx = 0xbcb4c0 events = <value optimized out> event = 0xbcc330 list = 0xbebbb0 io = <value optimized out> tv = {tv_sec = 1799, tv_usec = 999143} events_count = <value optimized out> msecs = <value optimized out> ret = 1 ---Type <return> to continue, or q <return> to quit--- i = <value optimized out> call = <value optimized out> __FUNCTION__ = "io_loop_handler_run_internal" #23 0x00007f9caeb33fbc in io_loop_handler_run (ioloop=0xbc99a0) at ioloop.c:648 No locals. #24 0x00007f9caeb34178 in io_loop_run (ioloop=0xbc99a0) at ioloop.c:623 __FUNCTION__ = "io_loop_run" #25 0x00007f9caeabc6f3 in master_service_run (service=0xbc9840, callback=<value optimized out>) at master-service.c:666 No locals. #26 0x0000000000426525 in main (argc=2, argv=0xbc95e0) at main.c:491 set_roots = {0x42f280, 0x637a40, 0x0} login_set = {auth_socket_path = 0xbc1050 "\210\020\274", postlogin_socket_path = 0xbc1088 "[myuser@mydomain.eu 192.168.218.35 LIST]", postlogin_timeout_secs = 60, callback = 0x426680 <login_client_connected>, failure_callback = 0x425dd0 <login_client_failed>, request_auth_token = 1} service_flags = <value optimized out> storage_service_flags = <value optimized out> username = <value optimized out> auth_socket_path = 0x430284 "auth-master" c = <value optimized out>

-- Alessio Cecchi Postmaster @ http://www.qboxmail.it https://www.linkedin.com/in/alessice