Fatal Error after upgrade to 2:2.3.19-2+debian11

16 May 2022


      Hello all,
I updated the server tonight and with it Dovecot from 2.2.27 to
2:2.3.19-2+debian11. However, there seems to be a problem with the ACLs,
because since then fatal errors are logged (see core dump). I suspect
that some outdated configuration is causing this behavior, but so far I
couldn't figure out which one it could be. I also have no clue right now
how to debug this further.
Thank you very much for your help. If more information are needed, I
will of course be happy to provide them.
VG
Sebastian
======== Error logs =========
May 16 13:33:43 Fatal: imap(user1@domain.com)<0r5YZR/fM4AfrHBI>: master:
service(imap): child 238359 killed with signal 11 (core dumped)
May 16 13:33:46 Fatal: imap(user2@domain.com)<Ul+kZR/fA4AfrHBI>: master:
service(imap): child 238386 killed with signal 11 (core dumped)
May 16 13:33:46 Fatal: imap(user3@domain.com)<VGOkZR/fG4AfrHBI>: master:
service(imap): child 238387 killed with signal 11 (core dumped)
May 16 13:34:54 Fatal: imap(user4@domain.com)<1WS6aR/fHoAfrHBI>: master:
service(imap): child 238509 killed with signal 11 (core dumped)
May 16 13:34:54 Fatal: imap(user2@domain.com)<mQu6aR/fBIAfrHBI>: master:
service(imap): child 238508 killed with signal 11 (core dumped)
May 16 13:35:27 Fatal: imap(user3@domain.com)<pWGYax/fE4AfrHBI>: master:
service(imap): child 238589 killed with signal 11 (core dumped)
May 16 13:35:27 Fatal: imap(user1@domain.com)<s/mgax/fG4AfrHBI>: master:
service(imap): child 238590 killed with signal 11 (core dumped)
======== END Error logs =========
======== dovecot.conf ==========
# 2.3.19 (b3ad6004dc): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.19 (4eae2f79)
# OS: Linux 5.10.0-14-amd64 x86_64 Debian 11.3
# Hostname: wv-imap1.wavecloud.de
auth_mechanisms = plain login
default_vsz_limit = 4 G
dict {
acl = mysql:/etc/dovecot/dovecot-dict-sql.conf
}
first_valid_gid = 5000
first_valid_uid = 5000
imap_capability = +XDOVECOT
last_valid_gid = 5000
last_valid_uid = 5000
listen = 10.10.115.XX
login_trusted_networks = 10.10.115.XX 10.10.115.XX
mail_location = maildir:~/
mail_log_prefix = "%s(%u)<%{session}>: "
mail_plugins = acl notify quota fts fts_solr virtual
maildir_stat_dirs = 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 ihave
namespace {
inbox = yes
location =
mailbox Archive {
auto = subscribe
special_use = \Archive
}
mailbox Drafts {
auto = subscribe
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
auto = subscribe
special_use = \Sent
}
mailbox "Sent Items" {
auto = no
special_use = \Sent
}
mailbox "Sent Messages" {
auto = no
special_use = \Sent
}
mailbox Spam {
auto = subscribe
special_use = \Junk
}
mailbox Trash {
auto = subscribe
special_use = \Trash
}
prefix =
separator = /
type = private
}
namespace Virtual {
hidden = yes
list = no
location = virtual:/etc/dovecot/virtual:INDEX=/srv/vmail/_virtual/%u
prefix = Virtual/
separator = /
subscriptions = no
}
namespace shared {
list = yes
location = maildir:%%h:INDEX=~/shared/%%u
prefix = shared/%%u/
separator = /
subscriptions = no
type = shared
}
passdb {
args = /etc/dovecot/dovecot-sql-password.conf
driver = sql
}
passdb {
args = /etc/dovecot/admin-sql.conf
driver = sql
master = yes
pass = yes
}
plugin {
acl = vfile
acl_shared_dict = proxy::acl
fts = solr
fts_autoindex = yes
fts_solr = url=http://wv-solr1.wavecloud.de:8983/solr/dovecot/
quota = maildir:User quota
quota_rule = *:storage=20G
quota_rule2 = Trash:storage=+100M
quota_rule3 = SPAM:ignore
quota_warning = storage=95%% quota-warning 95 %u
quota_warning2 = storage=80%% quota-warning 80 %u
quota_warning3 = -storage=100%% quota-warning below %u
sieve = ~/.dovecot.sieve
sieve_before = /var/vmail/globalsieverc
sieve_max_script_size = 1M
sieve_quota_max_scripts = 42
sieve_quota_max_storage = 10
}
protocols = imap pop3 sieve lmtp
service auth {
unix_listener /var/spool/postfix/private/auth {
group = vmail
mode = 0666
user = vmail
}
unix_listener auth-master {
mode = 0666
}
}
service dict {
unix_listener dict {
mode = 0600
user = vmail
}
}
service imap-login {
process_min_avail = 1
service_count = 0
vsz_limit = 500 M
}
service lmtp {
inet_listener lmtp {
address = 0.0.0.0
port = 24
}
}
service managesieve-login {
executable = /usr/lib/dovecot/managesieve-login
inet_listener sieve {
address = 10.10.115.10
port = 4190
}
process_min_avail = 1
service_count = 1
}
service managesieve {
executable = /usr/local/sbin/dovecot-managesieve.sh
}
service pop3-login {
process_min_avail = 1
service_count = 1
}
service quota-warning {
executable = script /usr/local/sbin/quota-warning.sh
user = vmail
}
service stats {
unix_listener stats-reader {
group = vmail
mode = 0660
user = vmail
}
unix_listener stats-writer {
group = vmail
mode = 0660
user = vmail
}
}
shutdown_clients = no
ssl_cert = </etc/ssl/cert.pem
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
args = /etc/dovecot/dovecot-sql.conf
driver = sql
}
verbose_proctitle = yes
protocol imap {
imap_client_workarounds = delay-newmail tb-extra-mailbox-sep
mail_max_userip_connections = 2048
mail_plugins = acl notify quota fts fts_solr virtual imap_quota imap_acl
}
protocol pop3 {
mail_plugins = acl notify quota fts fts_solr virtual
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %08Xu%08Xv
}
protocol lda {
hostname = wv-imap1.wavecloud.de
mail_fsync = optimized
mail_plugins = acl notify quota fts fts_solr virtual sieve
postmaster_address = postmaster@example.com
quota_full_tempfail = yes
sendmail_path = /usr/lib/sendmail
}
protocol sieve {
managesieve_implementation_string = Dovecot Pigeonhole
}
protocol lmtp {
mail_fsync = optimized
mail_plugins = acl notify quota fts fts_solr virtual sieve
}
======== END dovecot.conf ==========
======== Core-Dump =================
        PID: 240475 (imap)
        UID: 5000 (vmail)
        GID: 5000 (vmail)
     Signal: 11 (SEGV)
  Timestamp: Mon 2022-05-16 13:49:56 CEST (1min 17s ago)
Command Line: dovecot/imap [user1@domain.com XX.XX.XX.XX MYRIGHTS]
Executable: /usr/lib/dovecot/imap
Control Group: /system.slice/dovecot.service
Unit: dovecot.service
Slice: system.slice
Boot ID: acb78ce2252049778ff969755d277453
Machine ID: 1367ff1e75be457cacbf5e204a28711b
Hostname: wv-imap1
Storage:
/var/lib/systemd/coredump/core.imap.5000.acb78ce2252049778ff969755d277453.240475.1652701796000000.zst
Message: Process 240475 (imap) of user 5000 dumped core.
             Stack trace of thread 240475:
             #0  0x00007f5db938c17c acl_mailbox_get_aclobj 
(lib01_acl_plugin.so + 0xf17c)
#1  0x00007f5db93776ed n/a (lib02_imap_acl_plugin.so +
0x36ed)
#2  0x000055f5568444d4 command_exec (imap + 0x224d4)
#3  0x000055f55684244f n/a (imap + 0x2044f)
#4  0x000055f5568424fa n/a (imap + 0x204fa)
#5  0x000055f5568429d5 client_handle_input (imap + 0x209d5)
#6  0x000055f556842f40 client_input (imap + 0x20f40)
#7  0x00007f5db9682529 io_loop_call_io (libdovecot.so.0

0x118529)
#8  0x00007f5db9683c12 io_loop_handler_run_internal
(libdovecot.so.0 + 0x119c12)
#9  0x00007f5db96825d0 io_loop_handler_run
(libdovecot.so.0 + 0x1185d0)
#10 0x00007f5db9682790 io_loop_run (libdovecot.so.0 +
0x118790)
#11 0x00007f5db95f5353 master_service_run
(libdovecot.so.0 + 0x8b353)
#12 0x000055f556833f0a main (imap + 0x11f0a)
#13 0x00007f5db93c5d0a __libc_start_main (libc.so.6 +
0x26d0a)
#14 0x000055f556833fca _start (imap + 0x11fca)

=========== END Core-Dump =============
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