On 05/03/18 15:14, Ralf Hildebrandt wrote:

Got a coredump:

Mar 5 15:09:42 mail-cbf dovecot: lmtp(backup@backup.invalid)<15425><2B+kCaZPnVpBPAAAplP5LA>: Fatal: master: service(lmtp): child 15425 killed with signal 6 (core dumped)

#0 0x00007fea19977428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54 resultvar = 0 pid = 15425 selftid = 15425 #1 0x00007fea1997902a in __GI_abort () at abort.c:89 save_stage = 2 act = { __sigaction_handler = { sa_handler = 0x56239d9a3890, sa_sigaction = 0x56239d9a3890 }, sa_mask = { __val = {1, 94710917811261, 140643428345904, 94710917811577, 0, 140735221053024, 94710938452648, 513, 7700885895375379200, 0, 140643433202867, 94710938452648, 140735221053120, 94710938452304, 140643433203225, 94710938452648} }, sa_flags = 433895898, sa_restorer = 0x5 } sigs = { __val = {32, 0 } } #2 0x00007fea19dd2aaf in default_fatal_finish (type=LOG_TYPE_PANIC, status=status@entry=0) at failures.c:228 backtrace = 0x56239bd7c2e0 "/usr/lib/dovecot/libdovecot.so.0(+0xc6aca) [0x7fea19dd2aca] -> /usr/lib/dovecot/libdovecot.so.0(+0xc6bad) [0x7fea19dd2bad] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fea19d44721] -> /usr/lib/d"... recursed = 0 #3 0x00007fea19dd2bad in i_internal_fatal_handler (ctx=0x7fff78dbb710, format=<optimized out>, args=<optimized out>) at failures.c:718 status = 0 #4 0x00007fea19d44721 in i_panic (format=format@entry=0x7fea19e0ec98 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:306 ctx = { type = LOG_TYPE_PANIC, exit_status = 0, timestamp = 0x0, timestamp_usecs = 0, log_prefix = 0x0 } args = #5 0x00007fea19d4831d in smtp_address_write (out=0x56239bd7c150, address=0x56239bd7c108) at smtp-address.c:530 quoted = <optimized out> p = 0x56239bd7c11b "üller" pend = 0x56239bd7c121 "" pblock = 0x56239bd7c11a "müller" __func__ = "smtp_address_write" #6 0x00007fea19d48411 in smtp_address_encode (address=0x56239bd7c108) at smtp-address.c:567 str = 0x56239bd7c150 #7 0x00007fea1a3cf774 in mail_deliver_log_update_cache (cache=cache@entry=0x56239bddf1c8, pool=0x56239bddf180, mail=0x56239be185c8) at mail-deliver.c:111 message_id = 0x56239d943a4c "" subject = 0x56239d943b69 "JOMEC Seminar | Von Kennzahlencockpits und Lean Hospital Strategien" from_envelope = 0x0 from = <optimized out> #8 0x00007fea1a3cfabf in mail_deliver_save_finish (ctx=0x56239be14ca0) at mail-deliver.c:533 box = <optimized out> mbox = 0x56239be0efc0 muser = 0x56239bdcb7c0 dt = 0x56239bddf1c0 #9 0x00007fea1a0c758c in mailbox_save_finish (_ctx=_ctx@entry=0x7fff78dbb948) at mail-storage.c:2461 _data_stack_cur_id = 4 ctx = 0x56239be14ca0 t = 0x56239be10ce0 keywords = 0x0 pvt_flags = 0 copying_via_save = true ret = <optimized out> #10 0x00007fea1a0b9eb4 in mail_storage_copy (ctx=0x0, ctx@entry=0x56239be14ca0, mail=mail@entry=0x56239bdfdb28) at mail-copy.c:112 __func__ = "mail_storage_copy" #11 0x00007fea1a0e03f6 in mdbox_copy (_ctx=0x56239be14ca0, mail=0x56239bdfdb28) at mdbox-save.c:461 ctx = 0x56239be14ca0 save_mail = 0x56239bdfdb28 src_mbox = <optimized out> rec = { map_uid = 2615013952, save_date = 22051 } guid_data = 0x7fff78dbb9b0 wanted_guid = "@\362ݛ#V\000\000\240L\341\233#V\000" #12 0x00007fea1a3cf999 in mail_deliver_copy (ctx=0x56239be14ca0, mail=0x56239bdfdb28) at mail-deliver.c:547 box = <optimized out> mbox = 0x56239be0efc0 muser = 0x56239bdcb7c0 dt = 0x56239bddf1c0 #13 0x00007fea1a0c7956 in mailbox_copy_int (_ctx=_ctx@entry=0x7fff78dbba98, mail=0x56239bdfdb28) at mail-storage.c:2532 _data_stack_cur_id = 3 ctx = 0x56239be14ca0 t = 0x56239be10ce0 keywords = 0x0 pvt_flags = 0 backend_mail = 0x56239bdfdb28 ret = <optimized out> __func__ = "mailbox_copy_int" #14 0x00007fea1a0c7c38 in mailbox_save_using_mail (_ctx=_ctx@entry=0x7fff78dbba98, mail=<optimized out>) at mail-storage.c:2584 ctx = <optimized out> __func__ = "mailbox_save_using_mail" #15 0x00007fea1a3d02ac in mail_deliver_save (ctx=ctx@entry=0x7fff78dbbc60, mailbox=<optimized out>, flags=flags@entry=0, keywords=keywords@entry=0x0, storage_r=storage_r@entry=0x7fff78dbbc50) at mail-deliver.c:363 open_ctx = { user = 0x56239bdcacb8, lda_mailbox_autocreate = false, lda_mailbox_autosubscribe = false } box = 0x56239be0e6b8 trans_flags = <optimized out> t = 0x56239be10ce0 save_ctx = 0x0 headers_ctx = 0x0 kw = 0x0 dest_mail = <optimized out> error = MAIL_ERROR_NONE mailbox_name = 0x56239a9d0a54 "INBOX" errstr = 0x0 guid = 0x6adf0aebb9aa5b00 changes = { pool = 0x1, uid_validity = 434166593, saved_uids = { arr = { buffer = 0x100000000, element_size = 7700885895375379200 }, v = 0x100000000, v_modifiable = 0x100000000 }, ignored_modseq_changes = 2614870800, changed = 35, no_read_perm = 86 } default_save = <optimized out> ret = 0 __func__ = "mail_deliver_save" #16 0x00007fea1a3d0916 in mail_deliver (ctx=ctx@entry=0x7fff78dbbc60, storage_r=storage_r@entry=0x7fff78dbbc50) at mail-deliver.c:496 muser = 0x56239bdcb7c0 ret = <optimized out> __func__ = "mail_deliver" #17 0x000056239a9cedc0 in lmtp_local_deliver (session=0x56239bddf1a8, src_mail=0x56239bdfdb28, rcpt=0x56239bdd5c80, trans=0x56239bde0d68, cmd=0x56239bde1ea8, local=0x56239bde2020) at lmtp-local.c:603 set_parser = <optimized out> line = <optimized out> str = 0x56239bd7bc08 proxy_data = { proto = SMTP_PROXY_PROTOCOL_LMTP, source_ip = { family = 0, u = { ip6 = { __in6_u = { __u6_addr8 = '\000' , __u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0} } }, ip4 = { s_addr = 0 } } }, source_port = 0, helo = 0x56239bd8d470 "mail-cbf.charite.de", login = 0x0, ttl_plus_1 = 0, timeout_secs = 0, extra_fields = 0x0, extra_fields_count = 0 } delivery_time_started = { tv_sec = 1520258982, tv_usec = 162818 } sets = <optimized out> rcpt_user = 0x56239bdcacb8 mail_set = <optimized out> username = <optimized out> rcpt_idx = 0 smtp_set = 0x56239be046e0 lda_set = 0x56239be04750 ns = <optimized out> rcpt_to = 0x56239bde0e78 trcpt = 0x56239bde0e38 storage = 0x56239bdcecc8 mail_error = 1793002219 ret = <optimized out> client = 0x56239bdbc338 service_user = <optimized out> dctx = { pool = 0x56239bddf180, set = 0x56239be04750, smtp_set = 0x56239be046e0, session = 0x56239bddf1a8, session_time_msecs = 0, delivery_time_started = { tv_sec = 1520258982, tv_usec = 162818 }, dup_db = 0x0, session_id = 0x56239bd8d450 "2B+kCaZPnVpBPAAAplP5LA", src_mail = 0x56239bdfdb28, mail_from = 0x56239bde0e08, mail_params = { auth = 0x0, body = { type = SMTP_PARAM_MAIL_BODY_TYPE_UNSPECIFIED, ext = 0x0 }, envid = 0x0, ret = SMTP_PARAM_MAIL_RET_UNSPECIFIED, size = 0, extra_params = { arr = { buffer = 0x0, element_size = 0 }, v = 0x0, v_modifiable = 0x0 } }, rcpt_to = 0x56239bde0e78, rcpt_params = { orcpt = { addr_type = 0x0, addr = 0x56239bde0e78, addr_raw = 0x0 }, notify = SMTP_PARAM_RCPT_NOTIFY_UNSPECIFIED, extra_params = { arr = { buffer = 0x0, element_size = 0 }, v = 0x0, v_modifiable = 0x0 } }, rcpt_user = 0x56239bdcacb8, rcpt_default_mailbox = 0x56239a9d0a54 "INBOX", dest_mail = 0x0, cache = 0x0, tempfail_error = 0x0, tried_default_save = true, saved_mail = false, save_dest_mail = false, mailbox_full = false, dsn = false } input = <optimized out> var_table = <optimized out> error = 0x0 #18 lmtp_local_deliver_to_rcpts (session=0x56239bddf1a8, trans=0x56239bde0d68, cmd=0x56239bde1ea8, local=0x56239bde2020) at lmtp-local.c:657 rcpt = 0x56239bdd5c80 first_uid = 4294967295 src_mail = 0x56239bdfdb28 count = <optimized out> i = 0 #19 lmtp_local_data (client=client@entry=0x56239bdbc338, cmd=cmd@entry=0x56239bde1ea8, trans=trans@entry=0x56239bde0d68, input=<optimized out>) at lmtp-local.c:734 local = 0x56239bde2020 session = 0x56239bddf1a8 old_uid = 0 #20 0x000056239a9cdb53 in cmd_data_finish (trans=0x56239bde0d68, cmd=0x56239bde1ea8, client=0x56239bdbc338) at commands.c:144 state = 0x56239bdbc3c0 input_proxy = 0x0 input_msg = 0x0 input_local = 0x56239bde26b8 inputs = {0x0, 0x56239bde2238, 0x0} #21 cmd_data_continue (conn_ctx=0x56239bdbc338, cmd=0x56239bde1ea8, trans=0x56239bde0d68) at commands.c:190 client = 0x56239bdbc338 state = 0x56239bdbc3c0 data_input = <optimized out> data = <optimized out> size = 543 ret = <optimized out> __func__ = "cmd_data_continue" #22 0x00007fea19d566e0 in cmd_data_handle_input (cmd=0x56239bde1ea8) at smtp-server-cmd-data.c:199 conn = 0x56239bde0930 callbacks = 0x56239abd27a0 command = 0x56239bde1ea8 data_cmd = 0x56239bde83e8 ret = <optimized out> __func__ = "cmd_data_handle_input" #23 0x00007fea19dea649 in io_loop_call_io (io=0x56239bdba970) at ioloop.c:614 ioloop = 0x56239bd82c70 t_id = 2 __func__ = "io_loop_call_io" #24 0x00007fea19debf29 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x56239bd82c70) at ioloop-epoll.c:222 ctx = 0x56239bd849f0 ret = <optimized out> __func__ = "cmd_data_handle_input" #23 0x00007fea19dea649 in io_loop_call_io (io=0x56239bdba970) at ioloop.c:614 ioloop = 0x56239bd82c70 t_id = 2 __func__ = "io_loop_call_io" #24 0x00007fea19debf29 in io_loop_handler_run_internal (ioloop=ioloop@entry=0x56239bd82c70) at ioloop-epoll.c:222 ctx = 0x56239bd849f0 ---Type <return> to continue, or q <return> to quit--- io = <optimized out> tv = { tv_sec = 299, tv_usec = 999816 } events_count = <optimized out> msecs = <optimized out> ret = 1 i = 0 j = <optimized out> call = <optimized out> __func__ = "io_loop_handler_run_internal" #25 0x00007fea19dea752 in io_loop_handler_run (ioloop=<optimized out>) at ioloop.c:666 No locals. #26 0x00007fea19dea968 in io_loop_run (ioloop=0x56239bd82c70) at ioloop.c:639 __func__ = "io_loop_run" #27 0x00007fea19d672a3 in master_service_run (service=0x56239bd82b00, callback=<optimized out>) at master-service.c:767 No locals. #28 0x000056239a9ccc3d in main (argc=1, argv=0x56239bd82890) at main.c:159 set_roots = {0x56239abd3280 , 0x56239abd31e0 , 0x56239abd2600 , 0x0} service_flags = <optimized out> storage_service_flags = (MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT | MAIL_STORAGE_SERVICE_FLAG_USERDB_LOOKUP | MAIL_STORAGE_SERVICE_FLAG_TEMP_PRIV_DROP | MAIL_STORAGE_SERVICE_FLAG_NO_LOG_INIT | MAIL_STORAGE_SERVICE_FLAG_NO_IDLE_TIMEOUT) tmp_base_dir = 0x56239bd7a040 "tp data)" c = <optimized out> error = 0x0

The assert and consequent core dump is happening when processing the u umlaut character from the From header. p = 0x56239bd7c11b "üller" The problem is reproducible with a simple test case using a file /tmp/test.txt that contains some 8 bit character like the u umlaut From: a.müller@example.com To: whoever@example.com Date: 05 March 2018 21:00:00 Subject: test test EOF Then it can be fed into posfix substituting youremailaddress@yourdomain with a real account on the dovecot server. cat /tmp/test.txt | sendmail -f someone@example.com youremailaddress@yourdomain In the maillog there is the following error message: Mar  5 01:00:40 localhost dovecot: lmtp(admin99)<22325><nhREHKiInFo1VwAA0J78UA>: Panic: file smtp-address.c: line 530 (smtp_address_write): assertion failed: (smtp_char_is_qpair(*p)) There are two ways to fix this: 1) let dovecot accept non ascii chars in the local part as it did until 2.2 (see attached patch) or 2) instead of the i_assert() call, log an error and reject the email. But this second approach looks more complicated. The patch just removes the i_assert() call. I tried that patch and it seems ok. Before applying it, it is worthwhile if anyone can remember what was the logic behind this i_assert() call in the first place (which I fail to see), in case there is something that I am overlooking. John --- smtp-address.c.orig    2018-03-05 20:47:35.654257741 +0100 +++ smtp-address.c    2018-03-05 20:47:48.550311547 +0100 @@ -527,7 +527,6 @@          if (!quoted) {              str_append_c(out, '.');          } else { -            i_assert(smtp_char_is_qpair(*p));              if (!smtp_char_is_qtext(*p))                  str_append_c(out, '\\');              str_append_c(out, *p);