• Aki Tuomi <aki.tuomi@dovecot.fi>:

Did you forget to include doveconf -n?

# 2.3.0.alpha0 (e84ffeb) [XI:2:2.3.0~alpha0-1~auto+200]: /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.0.alpha0 (66b7c14) # OS: Linux 4.4.0-24-generic x86_64 Ubuntu 16.04 LTS auth_mechanisms = plain login default_vsz_limit = 1 G imapc_host = email.charite.de imapc_port = 993 imapc_ssl = imaps imapc_ssl_verify = no listen = *,:: mail_gid = imapproxy mail_home = /home/imapproxy/%u mail_location = imapc:~/imapc mail_plugins = mail_log notify mail_uid = imapproxy passdb { args = host=email.charite.de port=993 ssl=imaps default_fields = userdb_imapc_user=%u userdb_imapc_password=%w userdb_imapc_host=email.charite.de userdb_imapc_ssl=imaps userdb_imapc_port=993 driver = imap } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = imap service auth { inet_listener { address = 127.0.0.1 port = 12345 } } ssl = required ssl_ca = </etc/ssl/certs/ca-certificates.crt ssl_cert = </etc/dovecot/dovecot.pem ssl_cipher_list = DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_key = </etc/dovecot/private/dovecot.pem userdb { driver = prefetch } verbose_proctitle = yes

-- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt@charite.de | http://www.charite.de

• Timo Sirainen <tss@iki.fi>:

On 11 Jul 2016, at 14:15, Ralf Hildebrandt <Ralf.Hildebrandt@charite.de> wrote:

...

From the log:

Jul 11 13:12:42 mproxy dovecot: imap-login: Login: user=<hildeb>, method=PLAIN, rip=141.42.206.36, lip=141.42.206.11, mpid=27254, TLS, session=<TGwoO1o3id+NKs4k> Jul 11 13:12:44 mproxy dovecot: imap(hildeb)<TGwoO1o3id+NKs4k>: Panic: file imap-client.c: line 854 (client_check_command_hangs): assertion failed: ((io_loop_find_fd_conditions(current_ioloop, client->fd_out) & IO_WRITE) != 0)

Could you gdb the core and print some outputs:

fr 5 (or whichever frame number has client_check_command_hangs) p *client p *client->command_queue p *client->command_queue->next p *client->command_queue->next->next (etc, until it fails) p *current_ioloop p *current_ioloop->io_files p *current_ioloop->io_files->next p *current_ioloop->io_files->next->next (etc, until it fails)

Here it goes:

Core was generated by 'dovecot/imap'. Program terminated with signal SIGABRT, Aborted. #0 0x00007f6fa260d418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 54 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) bt #0 0x00007f6fa260d418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 #1 0x00007f6fa260f01a in __GI_abort () at abort.c:89 #2 0x00007f6fa2a2f226 in default_fatal_finish (type=<optimized out>, status=status@entry=0) at failures.c:201 #3 0x00007f6fa2a2f31c in i_internal_fatal_handler (ctx=0x7ffc8041e430, format=<optimized out>, args=<optimized out>) at failures.c:670 #4 0x00007f6fa29cd6ce in i_panic (format=format@entry=0x558b2197ce00 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:275 #5 0x0000558b2196bd42 in client_check_command_hangs (client=0x558b21bf7030) at imap-client.c:854 #6 client_continue_pending_input (client=0x558b21bf7030) at imap-client.c:919 #7 0x0000558b2196be68 in client_output (client=0x558b21bf7030) at imap-client.c:1233 #8 0x00007f6fa2a50500 in stream_send_io (fstream=0x558b21be5bb0) at ostream-file.c:478 #9 0x00007f6fa2a432ec in io_loop_call_io (io=0x558b21bfdf00) at ioloop.c:564 #10 0x00007f6fa2a44741 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x558b21ba3740) at ioloop-epoll.c:221 #11 0x00007f6fa2a43375 in io_loop_handler_run (ioloop=ioloop@entry=0x558b21ba3740) at ioloop.c:612 #12 0x00007f6fa2a43510 in io_loop_run (ioloop=0x558b21ba3740) at ioloop.c:588 #13 0x00007f6fa29d3c43 in master_service_run (service=0x558b21ba35e0, callback=<optimized out>) at master-service.c:650 #14 0x0000558b2195eaf2 in main (argc=1, argv=0x558b21ba3390) at main.c:460

(gdb) fr 5 #5 0x0000558b2196bd42 in client_check_command_hangs (client=0x558b21bf7030) at imap-client.c:854 854 imap-client.c: No such file or directory.

(gdb) p *client $1 = {prev = 0x0, next = 0x0, v = {state_export = 0x558b219763a0 <imap_state_export_base>, state_import = 0x558b219768f0 <imap_state_import_base>, destroy = 0x558b2196c290 <client_default_destroy>}, session_id = 0x558b21bf71d8 "qsZiv2w3uLWNKs4k", userdb_fields = 0x558b21bf7400, fd_in = 7, fd_out = 7, io = 0x558b21be5cf0, input = 0x558b21be5a60, output = 0x558b21be5c40, to_idle = 0x558b21be5d50, to_idle_output = 0x558b21bfe020, to_delayed_input = 0x0, pool = 0x558b21bf7010, service_user = 0x558b21baa020, set = 0x558b21baa7f0, lda_set = 0x558b21baa930, capability_string = 0x558b21bf7258, user = 0x558b21bb8360, mailbox = 0x558b21bfa060, keywords = {names = 0x558b21bfb0f8, announce_count = 1}, sync_counter = 1, messages_count = 1443, recent_count = 0, uidvalidity = 58, enabled_features = (unknown: 0), last_input = 1468315092, last_output = 1468315092, bad_counter = 0, free_parser = 0x0, command_pool = 0x558b21bf7820, command_queue = 0x558b21bf7840, command_queue_size = 1, sync_last_full_modseq = 12854, highest_fetch_modseq = 0, fetch_hdr_count = 0, fetch_body_count = 1, fetch_hdr_bytes = 0, fetch_body_bytes = 369600, deleted_count = 0, expunged_count = 0, trashed_count = 0, search_saved_uidset = {arr = {buffer = 0x0, element_size = 0}, v = 0x0, v_modifiable = 0x0}, search_updates = {arr = {buffer = 0x0, element_size = 0}, v = 0x0, v_modifiable = 0x0}, notify_ctx = 0x0, notify_uidnext = 157276, input_lock = 0x0, output_cmd_lock = 0x558b21bf7840, mailbox_change_lock = 0x0, urlauth_ctx = 0x0, module_contexts = {arr = { buffer = 0x558b21bf71f0, element_size = 8}, v = 0x558b21bf71f0, v_modifiable = 0x558b21bf71f0}, sync_seen_deletes = false, disconnected = false, destroyed = false, handling_input = false, syncing = false, id_logged = false, mailbox_examined = false, anvil_sent = true, tls_compression = false, input_skip_line = false, modseqs_sent_since_sync = false, notify_immediate_expunges = false, notify_count_changes = true, notify_flag_changes = true, imap_metadata_enabled = false, nonpermanent_modseqs = false, state_import_bad_idle_done = false, state_import_idle_continue = false}

(gdb) p *client->command_queue $2 = {prev = 0x0, next = 0x0, client = 0x558b21bf7030, pool = 0x558b21bf7820, tag = 0x558b21bf7970 "a0020", name = 0x558b21bf7978 "UID FETCH", args = 0x558b21bf7988 "157242 BODY.PEEK[]", cmd_flags = COMMAND_FLAG_BREAKS_SEQS, tagline_reply = 0x0, func = 0x558b219616a0 <cmd_fetch_continue>, context = 0x558b21bf79a0, module_contexts = {arr = {buffer = 0x558b21bf7908, element_size = 8}, v = 0x558b21bf7908, v_modifiable = 0x558b21bf7908}, parser = 0x558b21ba7810, state = CLIENT_COMMAND_STATE_WAIT_OUTPUT, start_time = {tv_sec = 1468315092, tv_usec = 52854}, last_run_timeval = { tv_sec = 1468315092, tv_usec = 52854}, start_ioloop_wait_usecs = 1094365, running_usecs = 50959, bytes_in = 18, bytes_out = 369642, sync = 0x0, uid = true, cancel = false, param_error = false, search_save_result = false, search_save_result_used = false, temp_executed = true, tagline_sent = false, executing = false}

(gdb) p *client->command_queue->next Cannot access memory at address 0x0

(gdb) p *current_ioloop $4 = {prev = 0x0, cur_ctx = 0x558b21bb8150, io_files = 0x558b21bfdea0, next_io_file = 0x0, timeouts = 0x558b21ba37c0, timeouts_new = {arr = {buffer = 0x558b21ba3930, element_size = 8}, v = 0x558b21ba3930, v_modifiable = 0x558b21ba3930}, handler_context = 0x558b21ba5250, notify_handler_context = 0x0, max_fd_count = 0, time_moved_callback = 0x7f6fa2cfdea0 <mail_storage_service_time_moved>, next_max_time = 1468315393, ioloop_wait_usecs = 1097229, io_pending_count = 0, running = true, iolooping = true}

(gdb) p *current_ioloop->io_files $5 = {io = {condition = IO_READ, source_linenum = 1558, pending = false, callback = 0x7f6fa2d4bb50 <imapc_connection_input>, context = 0x558b21be1570, ioloop = 0x558b21ba3740, ctx = 0x558b21bb8150}, prev = 0x0, next = 0x558b21be5cf0, refcount = 1, fd = 16, istream = 0x0}

(gdb) p *current_ioloop->io_files->next $6 = {io = {condition = IO_READ, source_linenum = 115, pending = false, callback = 0x558b2196beb0 <client_input>, context = 0x558b21bf7030, ioloop = 0x558b21ba3740, ctx = 0x558b21bb8150}, prev = 0x558b21bfdea0, next = 0x558b21ba6ba0, refcount = 1, fd = 7, istream = 0x558b21be5a60}

(gdb) p *current_ioloop->io_files->next->next $7 = {io = {condition = IO_ERROR, source_linenum = 520, pending = false, callback = 0x7f6fa29d42f0 <master_status_error>, context = 0x558b21ba35e0, ioloop = 0x558b21ba3740, ctx = 0x0}, prev = 0x558b21be5cf0, next = 0x558b21ba6020, refcount = 1, fd = 6, istream = 0x0}

(gdb) p *current_ioloop->io_files->next->next->next $8 = {io = {condition = IO_READ, source_linenum = 244, pending = false, callback = 0x7f6fa2a46540 <signal_read>, context = 0x0, ioloop = 0x558b21ba3740, ctx = 0x0}, prev = 0x558b21ba6ba0, next = 0x0, refcount = 1, fd = 10, istream = 0x0}

(gdb) p *current_ioloop->io_files->next->next->next->next Cannot access memory at address 0x0

-- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebrandt@charite.de | http://www.charite.de