doveadm: Error: open(/proc/self/io) failed

me at tdiehl.org me at tdiehl.org
Tue Jul 23 02:48:07 EEST 2019


Hi,

I am running dovecot-2.2.36-3.el7.x86_64 on a Centos 7 machine. I keep seeing
the following errors in the dovecot.log:
Jul 22 12:52:04 vmail2 dovecot: doveadm: Error: open(/proc/self/io) failed: Permission denied

Dovecot -n is listed below:
# 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.24 (124e06aa)
# OS: Linux 3.10.0-957.21.3.el7.x86_64 x86_64 CentOS Linux release 7.6.1810 (Core) 
# Hostname: vmail2.kmg.mydomain.com
auth_master_user_separator = *
auth_mechanisms = PLAIN LOGIN
deliver_log_format = from=%{from}, envelope_sender=%{from_envelope}, subject=%{subject}, msgid=%m, size=%{size}, %$
dict {
   acl = mysql:/etc/dovecot/dovecot-share-folder.conf
   quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
}
doveadm_password =  # hidden, use -P to show it
doveadm_port = 2525
first_valid_uid = 2000
last_valid_uid = 2000
mail_gid = 2000
mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/
mail_plugins = quota mailbox_alias acl mail_log notify stats replication
mail_uid = 2000
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 = yes
   location =
   mailbox Archive {
     auto = no
     special_use = \Archive
   }
   mailbox Archives {
     auto = no
     special_use = \Archive
   }
   mailbox "Deleted Messages" {
     auto = no
     special_use = \Trash
   }
   mailbox Drafts {
     auto = subscribe
     special_use = \Drafts
   }
   mailbox Junk {
     auto = subscribe
     special_use = \Junk
   }
   mailbox "Junk E-mail" {
     auto = no
     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 = no
     special_use = \Junk
   }
   mailbox Trash {
     auto = subscribe
     special_use = \Trash
   }
   prefix =
   separator = /
   type = private
}
namespace {
   list = children
   location = maildir:%%Lh/Maildir/:INDEX=%%Lh/Maildir/Shared/%%Ld/%%Ln
   prefix = Shared/%%u/
   separator = /
   subscriptions = yes
   type = shared
}
passdb {
   args = /etc/dovecot/dovecot-mysql.conf
   driver = sql
}
passdb {
   args = /etc/dovecot/dovecot-master-users
   driver = passwd-file
   master = yes
}
plugin {
   acl = vfile
   acl_shared_dict = proxy::acl
   fts_autoindex = yes
   fts_autoindex_max_recent_msgs = 50
   imapsieve_mailbox1_before = file:/usr/lib64/dovecot/sieve/report-spam.sieve
   imapsieve_mailbox1_causes = COPY
   imapsieve_mailbox1_name = Spam
   imapsieve_mailbox2_before = file:/usr/lib64/dovecot/sieve/report-ham.sieve
   imapsieve_mailbox2_causes = COPY
   imapsieve_mailbox2_from = Spam
   imapsieve_mailbox2_name = *
   mail_log_events = delete undelete expunge mailbox_delete mailbox_rename
   mail_log_fields = uid box msgid size from subject
   mail_replica = tcp:vmail1.kmg.mydomain.com
   mailbox_alias_new = Sent Messages
   mailbox_alias_new2 = Sent Items
   mailbox_alias_old = Sent
   mailbox_alias_old2 = Sent
   quota = dict:user::proxy::quotadict
   quota_grace = 10%%
   quota_warning = storage=100%% quota-warning 100 %u
   quota_warning2 = storage=95%% quota-warning 95 %u
   quota_warning3 = storage=90%% quota-warning 90 %u
   quota_warning4 = storage=85%% quota-warning 85 %u
   sieve = ~/sieve/dovecot.sieve
   sieve_before = /var/vmail/sieve/dovecot.sieve
   sieve_dir = ~/sieve
   sieve_global_dir = /var/vmail/sieve
   sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute
   sieve_max_redirects = 30
   sieve_pipe_bin_dir = /usr/lib64/dovecot/sieve
   sieve_plugins = sieve_imapsieve sieve_extprograms
   sieve_vacation_send_from_recipient = yes
   stats_refresh = 30 secs
   stats_track_cmds = yes
}
protocols = pop3 imap sieve lmtp
service aggregator {
   fifo_listener replication-notify-fifo {
     user = vmail
   }
   unix_listener replication-notify {
     user = vmail
   }
}
service auth {
   unix_listener /var/spool/postfix/private/dovecot-auth {
     group = postfix
     mode = 0666
     user = postfix
   }
   unix_listener auth-master {
     group = vmail
     mode = 0666
     user = vmail
   }
   unix_listener auth-userdb {
     group = vmail
     mode = 0660
     user = vmail
   }
}
service config {
   unix_listener config {
     user = vmail
   }
}
service dict {
   unix_listener dict {
     group = vmail
     mode = 0660
     user = vmail
   }
}
service doveadm {
   inet_listener {
     port = 2525
   }
   user = vmail
}
service imap-login {
   process_limit = 500
   service_count = 1
}
service lmtp {
   executable = lmtp -L
   inet_listener lmtp {
     address = 127.0.0.1
     port = 24
   }
   process_min_avail = 5
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
     group = postfix
     mode = 0600
     user = postfix
   }
   user = vmail
}
service managesieve-login {
   inet_listener sieve {
     address = 127.0.0.1
     port = 4190
   }
}
service pop3-login {
   service_count = 1
}
service quota-warning {
   executable = script /usr/local/bin/dovecot-quota-warning.sh
   unix_listener quota-warning {
     group = vmail
     mode = 0660
     user = vmail
   }
}
service replicator {
   process_min_avail = 1
   unix_listener replicator-doveadm {
     group = vmail
     mode = 0666
   }
}
service stats {
   fifo_listener stats-mail {
     mode = 0644
     user = vmail
   }
   inet_listener {
     address = 127.0.0.1
     port = 24242
   }
}
ssl = required
ssl_cert = </etc/pki/tls/certs/my_cert.crt
ssl_cipher_list = ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5
ssl_client_ca_file = /etc/pki/tls/cert.pem
ssl_key =  # hidden, use -P to show it
ssl_prefer_server_ciphers = yes
syslog_facility = local5
userdb {
   args = /etc/dovecot/dovecot-mysql.conf
   driver = sql
}
protocol lda {
   lda_mailbox_autocreate = yes
   lda_mailbox_autosubscribe = yes
   mail_plugins = quota mailbox_alias acl mail_log notify stats replication sieve
}
protocol lmtp {
   lmtp_save_to_detail_mailbox = yes
   mail_plugins = quota sieve
   recipient_delimiter = +
}
protocol imap {
   imap_client_workarounds = tb-extra-mailbox-sep
   mail_max_userip_connections = 30
   mail_plugins = quota mailbox_alias acl mail_log notify stats replication imap_quota imap_acl imap_stats imap_sieve
}
protocol pop3 {
   mail_max_userip_connections = 30
   mail_plugins = quota mailbox_alias acl mail_log notify stats replication
   pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
   pop3_uidl_format = %08Xu%08Xv
}

Everything seems to be working properly and the dovecot wiki says that /proc/self/io
is for statistics. I am thinking they are harmless but they are generating a bunch
of noise in the logs and if harmless, I would like to silence them.

Can someone let me know what causes this and if I should be concerned about this?

My Google foo has not been helpful on this.

Regards,

-- 
Tom			me at tdiehl.org


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