"Graham" == Graham Cobb via dovecot <dovecot@dovecot.org> writes:
Graham, Please post your 'doveconf -n' output, and if you can also post your sieve script, that would be helpful as well. Otherwise you'll need to try and create a smaller targeted sieve script which shows the problem.
Can you setup a test email account to use for this? That would help keep it seperate from your main mail account and keep your setting private.
Also, how long is your sieve script?
Good luck! John
dovecot is crashing for me while doing sieve processing for messages received via lmtp. This is reproducible, and seems to hit every message which runs a particular sieve script. Any thoughts or help would be appreciated! The error is:
Error: sieve: fail2ban: line 23: read(<lmtp DATA local>) failed: Seeking past EOF by 2364 bytes
Note: the number of bytes is always one of: 2169, 2272, 2259, 2364. I have many of these.
I cannot see how the "Seeking past EOF" error can be caused by a bug in my sieve script. But please let me know if it can!
Background: I have (and have had for many years) a complex set of sieve scripts for controlling my incoming email. They have worked fine for all that time. However, recently (ish), processing which uses a particular script is crashing dovecot. The actual log extract is below. The sieve script line 23, mentioned in the error report, is a large "if anyof (" statement containing many clauses like:
body :raw :regex "country:[[:space:]]+KR",
I can provide the full sieve script if required.
This is what I see in the dovecot log (note: I reformatted the backtrace to make it easier to read. I also changed all my server names):
Mar 29 03:03:52 SERVER dovecot-HOST: lmtp(4008073): Connect from local Mar 29 03:03:52 SERVER dovecot-HOST: lmtp(cobb)<4008073><PiAQHoiIyGmJKD0Ay7SJiA>: Error: sieve: fail2ban: line 23: read(<lmtp DATA local>) failed: Seeking past EOF by 2364 bytes Mar 29 03:03:52 SERVER dovecot-HOST: lmtp(cobb)<4008073><PiAQHoiIyGmJKD0Ay7SJiA>: Error: sieve: Execution of script 'auto:personal/.dovecot' was aborted due to temporary failure (user logfile /home/cobb/.dovecot.sieve.log may reveal additional details) Mar 29 03:03:52 SERVER dovecot-HOST: lmtp(cobb)<4008073><PiAQHoiIyGmJKD0Ay7SJiA>: Panic: file istream-concat.c: line 27 (i_stream_concat_close): assertion failed: (cstream->cur_input == cstream->input[cstream->cur_idx]) Mar 29 03:03:52 SERVER dovecot-HOST: lmtp(cobb)<4008073><PiAQHoiIyGmJKD0Ay7SJiA>: Error: Raw backtrace:
#1 [unw_get_proc_name() failed: -10]
-> #2 [unw_get_proc_name() failed: -10]
-> #3 i_panic[0x7f41540655e6]
-> #4 [unw_get_proc_name() failed: -10]
-> #5 io_stream_unref[0x7f415413c120]
-> #6 i_stream_unref[0x7f4154145c30]
-> #7 index_storage_mailbox_close[0x7f4154383e70]
-> #8 mailbox_close[0x7f41542fd9e0]
-> #9 mailbox_free[0x7f4154302ab0]
-> #10 lmtp_local_deinit[0x55dfa9c4e320]
-> #11 client_state_reset[0x55dfa9c4f0d0]
-> #12 smtp_server_transaction_free[0x7f4154091880]
-> #13 smtp_server_connection_reset_state[0x7f4154093c90]
-> #14 smtp_server_command_call_hooks[0x7f415408be60]
-> #15 smtp_server_command_send_replies[0x7f4154090050]
-> #16 [unw_get_proc_name() failed: -10]
-> #17 [unw_get_proc_name() failed: -10]
-> #18 io_loop_call_io[0x7f4154151710]
-> #19 io_loop_handler_run_internal[0x7f41541534b0]
-> #20 io_loop_handler_run[0x7f4154153640]
-> #21 io_loop_run[0x7f4154153820]
-> #22 master_service_run[0x7f41540a6330]
-> #23 main[0x55dfa9c4a260]
-> #24 __libc_start_call_main[0x7f4153e32c30]
-> #25 __libc_start_main_alias_2[0x7f4153e32ce0]
-> #26 _start[0x55dfa9c4a470]
Mar 29 03:03:54 SERVER dovecot-HOST: lmtp(cobb)<4008073><PiAQHoiIyGmJKD0Ay7SJiA>: Fatal: master: service(lmtp): child 4008073 killed with signal 6 (core dumped) Mar 29 03:04:05 SERVER postfix/lmtp[4008072]: 005083DC75D: to=<MYADDRESS@MYDOMAIN>, orig_to=<ANOTHER@ANOTHERDOMAIN>, relay=SERVERNAME[private/dovecot-lmtp], delay=1740676, delays=1740674/0.25/0.04/1.5, dsn=4.4.2, status=deferred (lost connection with SERVERNAME[private/dovecot-lmtp] while sending end of data -- message may be sent more than once)
The only message in .dovecot.sieve.log is:
fail2ban: line 23: error: failed to read input message: internal error occurred: refer to server log for more information. [2026-04-01 18:54:13].
Thanks in advance for any thoughts!
Graham
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