PaulHowarth/Blog/2021-10-29

Friday 29th October 2021

Fedora Project

  • Updated perltidy to 20211029 (see CHANGES.md for details)

Local Packages

  • Updated dovecot:

    • Updated dovecot to 2.3.17:

      • Dovecot now logs a warning if time seems to jump forward at least 100 milliseconds
      • dict: Lines logged by the dict process now contain the dict name as the prefix

      • lib-index: mail_cache_fields, mail_always_cache_fields and mail_never_cache_fields now verify that the listed header names are valid; in particular, the UTF8 "" character has sometimes been wrongly used instead of the ASCII "-"

      • *-login: Added login_proxy_rawlog_dir setting to capture rawlogs between proxy and back-end

      • dict: The server process now keeps the last 10 idle dict back-ends cached for a maximum of 30 seconds; practically this acts as a connection pool for dict-redis and dict-ldap (note that this doesn't affect dict-sql, because it already had its own internal cache)

      • doveadm: New stats add/remove commands added to support changing the metrics configuration at runtime
      • lazy_expunge: Added lazy_expunge_exclude settings to disable lazy_expunge for specific folders; \Special-use flags can be used as folder names

      • lib-lua: Added a new helper function dovecot.restrict_global_variables() to disable or enable defining new global variables

      • LAYOUT=index List index rebuild was missing

      • LAYOUT=index: Duplicate GUIDs were not detected

      • acl: When using acl_ignore_namespace Dovecot attempted to access or create dovecot-acl-list even when the namespace should have been ignored; for virtual namespaces this could have yielded errors about "Read-only file system" or "Permission denied"

      • auth: Setting the "master" passdb field to empty value would cause proxying to fail with an authentication error; now, an empty "master" field is ignored
      • doveadm-server: Duplicate error lines were sent for failed commands; this didn't normally cause visible problems, except when using wildcards in usernames or -A parameter to go through multiple users

      • doveadm-server: Logs written by doveadm-server were often missing log prefixes, especially mail_log_prefix for mail commands; logs sent to doveadm TCP client were also missing log prefixes

      • doveadm: v2.3 regression: batch command always crashes
      • doveadm: v2.3.11 regression: Commands failed if ssl_cert or ssl_key files weren't readable by the user running doveadm, even though doveadm didn't actually use these settings

      • imap-hibernate: Process may crash at deinit: Panic: file ioloop.c: line 928 (io_loop_destroy): assertion failed: (ioloop->cur_ctx == NULL)

      • imap: Using imap_fetch_failure=no-after can cause assert-crash with some IMAP commands if reading the mail fails (e.g. wrong cached mail size); fixes: Panic: file index-mail-headers.c: line 198 (index_mail_parse_header_init): assertion failed: (!mail->data.header_parser_initialized)

      • imap: v2.3.10 regression: When using INDEXPVT to enable private \Seen flags (for shared or public namespaces) the STORE command did not send untagged replies for the \Seen flag changes

      • imap: v2.3.15 regression: If PREVIEW/SNIPPET is not the final FETCH option in the command, the IMAP FETCH response is broken

      • imap: v2.3.15 regression: MOVE command leaks mailbox if it can't be opened and crashes at deinit: Panic: file mail-user.c: line 229 (mail_user_deinit): assertion failed: ((*user)->refcount == 1)

      • imapc: Copying non-existent mail via imapc could have crashed. Fixes: Panic: file mail-storage.c: line 2385 (mailbox_transaction_commit_get_changes): assertion failed: (ret < 0 || seq_range_count(&changes_r->saved_uids) == save_count || array_count(&changes_r->saved_uids) == 0)

      • indexer: v2.3.15 regression: Process crashes if indexer-client disconnects while it's waiting for command reply; this happened for example if IMAP SEARCH triggered long fts indexing and the IMAP client disconnected whilst waiting for the reply

      • indexer: v2.3.15 regression: Process may have crashed in some situations
      • indexer: v2.3.15 regression: indexer-worker processes may not have reached the process_limit in some situations, possibly even using just one indexer-worker process even though there were many indexing requests queued

      • lib-compression: Reading lz4 compressed mdbox mails may crash; fixes: Panic: file istream.c: line 345 (i_stream_read_memarea): assertion failed: (!stream->blocking)

      • lib-compression: bench-compress crashes due to xz being read-only

      • lib-lua: Fix linking libdict_lua for non-GNU linkers when Lua support is disabled

      •  lib-mail: There was no limit on how large an email header name could be; processable header names are now limited to 1000 bytes

      •  lib-oauth2: Dovecot disallowed JWT tokens if their validity time was older than token creation time (nbf < iat)

      • lib-storage: Reduce memory footprint of certain storage operations

      • lib-storage: When listing mailboxes with storage name escape characters (^ or .) as part of the mailbox name, the listing could show corrupted mailbox names; the corruption can occur when using LAYOUT=INDEX and maildir or obox, or when using the listescape plugin

      • mail-crypt: Fix "-O" argument for "doveadm mailbox cryptokey password" command to be a boolean, and not expect a string

      • submission-login: Add support for not authenticating to next hop in submission proxying

      • submission-login: EHLO was not sent again after XCLIENT when doing submission proxying

      • virtual: Mailboxes do not correctly detect underlying mailboxes getting re-created even though they have a different UIDVALIDITY or GUID

    • Updated pigeonhole to 0.5.17:

      • duplicate: The Sieve duplicate test is prone to false negatives when the user receives many e-mails concurrently, meaning that duplicate deliveries can still occur

      • fileinto: v2.3.16 regression: Sieve delivery crashes if mail is delivered to non-existing and existing folder

      • imap-filter-sieve: v2.3.15 regression: The CPU limits on Sieve execution are too easily exceeded in IMAP context (the IMAPSieve and FILTER=SIEVE capabilities); changed the default to unlimited CPU time for IMAP context, since similar excessive resource usage can be caused by other means as well (the CPU limits on Sieve scripts executed at LDA/LMTP delivery are still enforced by default)

      • redirect: The Sieve redirect action has protections against users triggering mail loops; unfortunately, the detection of a redirect mail loop sometimes causes the message to get lost if no other Sieve action is applied that delivers the message somewhere else

      • redirect: v2.3.16 regression: With certain Sieve scripts if redirect fails due to temporary failure, the lmtp process may crash after the delivery; Fixes: Panic: file mail-user.c: line 229 (mail_user_deinit): assertion failed: ((*user)->refcount == 1)

  • Updated perl-Perl-Tidy to 20211029 as per the Fedora perltidy package


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