2.3.17 broken on CentOS8 / bug

[Christian Kivalo]

On October 30, 2021 12:00:40 PM GMT+02:00, TG Servers <srvrs at prvtmail.net> wrote:
>Thanks for your reply William.
>
> But the only thing I found in the meanwhile about this issue is that when 
>the ca-bundles files is too "big" it does not work anymore. And if this 
>file is shortened to one entry it will work, someone seems to have tested 
>this.
> This is no fix, it is a bug that has to be fixed by dovecot from my pov.
> The ca-bundles file is used by countless applications without any issues, 
>it is used by 2.3.16 without any issues. There should be no special 
>treatment for a single application necessary.
Do you use client certs? If not, there is no need to even have ssl_ca set, see https://doc.dovecot.org/configuration_manual/dovecot_ssl_configuration/#id10
>
>
>On 30/10/2021 11:35, William Edwards wrote:
>
>
>Op 30 okt. 2021 om 10:35 heeft TG Servers <srvrs at prvtmail.net> het 
>volgende geschreven:
>
> 
>Hello,
>
> tonight my dovecot upgraded to 2.3.17 and completely broke on recent 
>CentOS 8 installation.
>
> I found the service in status 
>
> [root at riot ~]# systemctl status dovecot
> ● dovecot.service - Dovecot IMAP/POP3 email server
> Loaded: loaded (/usr/lib/systemd/system/dovecot.service; enabled; vendor 
>preset: disabled)
> Active: failed (Result: exit-code) since Sat 2021-10-30 09:59:11 CEST; 
>58s ago
> Docs: man:dovecot(1)
>https://doc.dovecot.org/
> Process: 1515 ExecStart=/usr/sbin/dovecot -F (code=exited, status=89)
> Process: 1429 ExecStartPre=/usr/libexec/dovecot/prestartscript 
>(code=exited, status=0/SUCCESS)
> Main PID: 1515 (code=exited, status=89)
>
> Oct 30 09:59:10 riot.<domain>.com systemd[1]: Starting Dovecot IMAP/POP3 
>email server...
> Oct 30 09:59:11 riot.<domain>.com dovecot[1515]: doveconf: Fatal: 
>execvp(/usr/libexec/dovecot/managesieve) failed: Argument list too long
> Oct 30 09:59:11 riot.<domain>.com dovecot[1515]: doveconf: Error: 
>managesieve-login: dump-capability process returned 89
> Oct 30 09:59:11 riot.<domain>.com dovecot[1515]: doveconf: Fatal: 
>execvp(/usr/sbin/dovecot) failed: Argument list too long
> Oct 30 09:59:11 riot.<domain>.com systemd[1]: dovecot.service: Main 
>process exited, code=exited, status=89/n/a
> Oct 30 09:59:11 riot.<domain>.com systemd[1]: dovecot.service: Failed 
>with result 'exit-code'.
> Oct 30 09:59:11 riot.<domain>.com systemd[1]: Failed to start Dovecot 
>IMAP/POP3 email server.
>
>
> Please check the archive. If I’m not mistaken, the same issue + possible 
>solution was posted on the mailing list yesterday. 
>
>
> This seems to be like a bug as no configuration was changed by me in the 
>middle of the night.
> I recall there were similar errors/bug reports in the past were it seemed 
>it was managesieve but wasn't, people had some misconfigurations in the 
>dovecot.conf. I did not change my dovecot.conf since April.
> But maybe here it is a pigeonhole issue.
>
> As I did not find any reason for it I changed the repo and downgraded to 
>2.3.16-2 now and it runs without any flaws, like all the time before. I had 
>no time to investigate this any longer thand 2 hours with 2.3.17 installed 
>as this is a production server and I need the email access. I also did not 
>find anything adressable in the logs.
>
> [root at riot dovecot]# systemctl status dovecot
> ● dovecot.service - Dovecot IMAP/POP3 email server
> Loaded: loaded (/usr/lib/systemd/system/dovecot.service; enabled; vendor 
>preset: disabled)
> Active: active (running) since Sat 2021-10-30 10:18:11 CEST; 2s ago
> Docs: man:dovecot(1)
>https://doc.dovecot.org/
> Process: 32398 ExecStartPre=/usr/libexec/dovecot/prestartscript 
>(code=exited, status=0/SUCCESS)
> Main PID: 32452 (dovecot)
> Status: "v2.3.16 (7e2e900c1a) running"
> Tasks: 4 (limit: 99912)
> Memory: 4.4M
> CGroup: /system.slice/dovecot.service
> ├─32452 /usr/sbin/dovecot -F
> ├─32507 dovecot/anvil
> ├─32508 dovecot/log
> └─32513 dovecot/config
>
> Oct 30 10:18:11 riot.<domain>.com systemd[1]: Starting Dovecot IMAP/POP3 
>email server...
> Oct 30 10:18:11 riot.<domain>.com dovecot[32452]: Warning: Corrected 
>permissions for login directory /var/run/dovecot/token-login
> Oct 30 10:18:11 riot.<domain>.com dovecot[32452]: master: Warning: 
>Corrected permissions for login directory /var/run/dovecot/token-login
> Oct 30 10:18:11 riot.<domain>.com dovecot[32452]: master: Dovecot v2.3.16 
>(7e2e900c1a) starting up for imap, lmtp, sieve
> Oct 30 10:18:11 riot.<domain>.com systemd[1]: Started Dovecot IMAP/POP3 
>email server.
>
>
> This is the configuration
> # 2.3.16 (7e2e900c1a): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.16 (09c29328)
> # OS: Linux 4.18.0-305.19.1.el8_4.x86_64 x86_64 AlmaLinux release 8.4 
>(Electric Cheetah)
> # Hostname: riot.<domain>.com
> auth_mechanisms = plain login
> auth_verbose = yes
> listen = *
> mail_gid = vmail
> mail_home = /var/vmail/mailboxes/%d/%n
> mail_location = maildir:~/mail:LAYOUT=fs
> mail_plugins = " quota fts fts_solr"
> mail_privileged_group = vmail
> 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 imapsieve vnd.dovecot.imapsieve
> namespace inbox {
> inbox = yes
> location =
> mailbox Drafts {
> auto = subscribe
> special_use = \Drafts
> }
> mailbox Sent {
> auto = subscribe
> special_use = \Sent
> }
> mailbox Spam {
> auto = subscribe
> special_use = \Junk
> }
> mailbox Trash {
> auto = subscribe
> special_use = \Trash
> }
> prefix =
> separator = .
> type = private
> }
> passdb {
> args = /etc/dovecot/dovecot-sql.conf
> driver = sql
> }
> plugin {
> fts = solr
> fts_autoindex = yes
> fts_solr = url=http://localhost:<solr_port>/solr/dovecot/
> imapsieve_mailbox1_before = file:/var/vmail/sieve/global/learn-spam.sieve
> imapsieve_mailbox1_causes = COPY
> imapsieve_mailbox1_name = Spam
> imapsieve_mailbox2_before = file:/var/vmail/sieve/global/learn-ham.sieve
> imapsieve_mailbox2_causes = COPY
> imapsieve_mailbox2_from = Spam
> imapsieve_mailbox2_name = *
> quota = maildir:User quota
> quota_exceeded_message = User %u is over the storage quota
> sieve = 
>file:/var/vmail/sieve/%d/%n/scripts;active=/var/vmail/sieve/%d/%n/active-script.sieve
> sieve_before = /var/vmail/sieve/global/spam-global.sieve
> sieve_global_extensions = +vnd.dovecot.pipe
> sieve_pipe_bin_dir = /usr/bin
> sieve_plugins = sieve_imapsieve sieve_extprograms
> }
> protocols = imap lmtp sieve
> service auth {
> unix_listener /var/spool/postfix/private/auth {
> group = postfix
> mode = 0660
> user = postfix
> }
> unix_listener auth-userdb {
> group = vmail
> mode = 0660
> user = vmail
> }
> }
> service imap-login {
> inet_listener imap {
> port = 0
> }
> inet_listener imaps {
> port = 993
> }
> }
> service lmtp {
> unix_listener /var/spool/postfix/private/dovecot-lmtp {
> group = postfix
> mode = 0660
> user = postfix
> }
> user = vmail
> }
> service managesieve-login {
> inet_listener sieve {
> port = 4190
> }
> }
> ssl = required
> ssl_ca = </etc/ssl/certs/ca-bundle.crt
> ssl_cert = </etc/ssl/certs/<domain>.com_chain.crt
> ssl_cipher_list = 
>TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:EECDH+AESGCM:EDH+AESGCM:@SECLEVEL=2
> ssl_client_ca_dir = /etc/ssl/certs
> ssl_client_ca_file = /etc/ssl/certs/ca-bundle.crt
> ssl_dh = # hidden, use -P to show it
> ssl_key = # hidden, use -P to show it
> ssl_prefer_server_ciphers = yes
> userdb {
> args = /etc/dovecot/dovecot-sql.conf
> driver = sql
> }
> protocol imap {
> imap_idle_notify_interval = 24 mins
> mail_max_userip_connections = 20
> mail_plugins = " quota fts fts_solr imap_quota imap_sieve"
> }
> protocol lmtp {
> mail_plugins = " quota fts fts_solr sieve"
> postmaster_address = postmaster@<domain>.com
> }
> local_name mail.<domain_3>.com {
> ssl_cert = </etc/ssl/certs/<domain_3>.com_chain.crt
> ssl_key = # hidden, use -P to show it
> }
> local_name mail.<domain_2>.net {
> ssl_cert = </etc/ssl/certs/<domain_2>.net_chain.crt
> ssl_key = # hidden, use -P to show it
> }
> local_name mail.<domain>.com {
> ssl_cert = </etc/ssl/certs/<domain>.com_chain.crt
> ssl_key = # hidden, use -P to show it
> }
-- 
Christian Kivalo