Panic: file mail-index-util.c: line 10 (mail_index_uint32_to_offset): assertion failed: (offset < 0x40000000)

I'm encountering a crash which this command:

% doveadm import -u restore@backup.invalid mdbox:/home/copymail2/mdbox '' mailbox INBOX header X-Spam Yes SAVEDBEFORE 2019-05-23

doveadm(restore@backup.invalid): Panic: file mail-index-util.c: line 10 (mail_index_uint32_to_offset): assertion failed: (offset < 0x40000000) doveadm(restore@backup.invalid): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xd9f9e) [0x7fbc52ba7f9e] -> /usr/lib/dovecot/libdovecot.so.0(+0xd9fe1) [0x7fbc52ba7fe1] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fbc52b0cc54] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_uint32_to_offset+0x78)[0x7fbc52f525e8] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_cache_add+0x83b)[0x7fbc52f3ac2b] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_mail_parse_header+0x449)[0x7fbc52f1c969] -> /usr/lib/dovecot/libdovecot.so.0(+0xb6af9) [0x7fbc52b84af9] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_memarea+0x7a) [0x7fbc52bb531a] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read+0x2f) [0x7fbc52bb565f] -> /usr/lib/dovecot/libdovecot.so.0(i_stream_read_data+0x3d)[0x7fbc52bb604d] -> /usr/lib/dovecot/libdovecot.so.0(message_parse_header_next+0x68)[0x7fbc52b8b3f8] -> /usr/lib/dovecot/libdovecot.so.0(message_parse_header+0x52)[0x7fbc52b8bdd2] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xcadae) [0x7fbc52f26dae] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xcc0ac) [0x7fbc52f280ac] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x11d)[0x7fbc52f288bd] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x28)[0x7fbc52ea92e8] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next+0x3d)[0x7fbc52ea934d] -> doveadm(+0x31443) [0x5635b4760443] -> doveadm(+0x2bdb1) [0x5635b475adb1] -> doveadm(+0x2caf9) [0x5635b475baf9] -> doveadm(doveadm_cmd_ver2_to_mail_cmd_wrapper+0x20e) [0x5635b475c9ce] -> doveadm(doveadm_cmd_run_ver2+0x55e) [0x5635b476db7e] -> doveadm(doveadm_cmd_try_run_ver2+0x37) [0x5635b476dbd7] -> doveadm(main+0x1d1) [0x5635b474aec1] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fbc5210fb97] -> doveadm(_start+0x2a) [0x5635b474b39a]

Version info:

ii dovecot-core 2:2.3.6-2~bionic amd64 secure POP3/IMAP server - core files ii dovecot-dbg 2:2.3.6-2~bionic amd64 secure POP3/IMAP server - debug symbols ii dovecot-imapd 2:2.3.6-2~bionic amd64 secure POP3/IMAP server - IMAP daemon ii dovecot-lmtpd 2:2.3.6-2~bionic amd64 secure POP3/IMAP server - LMTP server

Backtrace:

Program received signal SIGABRT, Aborted. __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 51../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) bt #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #1 0x00007ffff68fa801 in __GI_abort () at abort.c:79 #2 0x00007ffff7373f51 in default_fatal_finish (status=0, type=LOG_TYPE_PANIC) at failures.c:459 #3 fatal_handler_real (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:471 #4 0x00007ffff7373fe1 in default_fatal_handler (ctx=<optimized out>, format=<optimized out>, args=<optimized out>) at failures.c:479 #5 0x00007ffff72d8c54 in i_panic (format=format@entry=0x7ffff772e440 "file %s: line %d (%s): assertion failed: (%s)") at failures.c:523 #6 0x00007ffff771e5e8 in mail_index_uint32_to_offset (offset=<optimized out>) at mail-index-util.c:10 #7 0x00007ffff7706c2b in mail_cache_header_fields_write (ctx=0x55555583d960, buffer=<optimized out>, buffer=<optimized out>) at mail-cache-transaction.c:609 #8 mail_cache_header_add_field (field_idx=15, ctx=0x55555583d960) at mail-cache-transaction.c:690 #9 mail_cache_add (ctx=0x55555583d960, seq=1, field_idx=field_idx@entry=15, data=0x7ffff773ba56, data_size=0) at mail-cache-transaction.c:739 #10 0x00007ffff76eafdc in index_mail_cache_add_idx (mail=mail@entry=0x55555583e2f8, field_idx=field_idx@entry=15, data=data@entry=0x7ffff773ba56, data_size=data_size@entry=0) at index-mail.c:621 #11 0x00007ffff76e8969 in index_mail_parse_header_finish (mail=<optimized out>) at index-mail-headers.c:132 #12 index_mail_parse_header (part=<optimized out>, hdr=<optimized out>, mail=<optimized out>) at index-mail-headers.c:312 #13 0x00007ffff7350af9 in read_header (mstream=0x55555584b7f0) at istream-header-filter.c:357 #14 i_stream_header_filter_read (stream=0x55555584b7f0) at istream-header-filter.c:447 #15 0x00007ffff738131a in i_stream_read_memarea (stream=stream@entry=0x55555584b870) at istream.c:313 #16 0x00007ffff738165f in i_stream_read (stream=stream@entry=0x55555584b870) at istream.c:271 #17 0x00007ffff738204d in i_stream_read_data (stream=0x55555584b870, data_r=data_r@entry=0x7fffffffdbe8, size_r=size_r@entry=0x7fffffffdbf0, threshold=threshold@entry=1) at istream.c:745 #18 0x00007ffff73573f8 in i_stream_read_bytes (wanted=2, size_r=0x7fffffffdbf0, data_r=0x7fffffffdbe8, stream=<optimized out>) at ../../src/lib/istream.h:217 #19 message_parse_header_next (ctx=0x55555584ca70, hdr_r=hdr_r@entry=0x7fffffffdc50) at message-header-parser.c:85 #20 0x00007ffff7357dd2 in message_parse_header (input=<optimized out>, hdr_size=hdr_size@entry=0x0,flags=flags@entry=MESSAGE_HEADER_PARSER_FLAG_CLEAN_ONELINE, callback=callback@entry=0x7ffff76f2310 , context=context@entry=0x7fffffffdcc0) at message-header-parser.c:392 #21 0x00007ffff76f2dae in search_arg_match_text (ctx=0x55555583dd20, args=0x555555809690) at index-search.c:760 #22 search_match_once (ctx=0x55555583dd20) at index-search.c:1400 #23 0x00007ffff76f40ac in search_match_next (ctx=0x55555583dd20) at index-search.c:1507 #24 search_more_with_mail (mail=<optimized out>, ctx=0x55555583dd20) at index-search.c:1624 #25 search_more_with_prefetching (mail_r=<optimized out>, ctx=<optimized out>) at index-search.c:1706 #26 search_more (ctx=ctx@entry=0x55555583dd20, mail_r=mail_r@entry=0x7fffffffddf0) at index-search.c:1780 #27 0x00007ffff76f48bd in index_storage_search_next_nonblock(_ctx=0x55555583dd20, mail_r=0x7fffffffdec0, tryagain_r=0x7fffffffde57) at index-search.c:1808 #28 0x00007ffff76752e8 in mailbox_search_next_nonblock (ctx=0x55555583dd20, mail_r=0x7fffffffdec0, tryagain_r=<optimized out>) at mail-storage.c:2141 #29 0x00007ffff767534d in mailbox_search_next (ctx=0x55555583dd20, mail_r=mail_r@entry=0x7fffffffdec0) at mail-storage.c:2126 #30 0x0000555555586682 in doveadm_mail_iter_next (iter=<optimized out>, mail_r=mail_r@entry=0x7fffffffdec0) at doveadm-mail-iter.c:160 #31 0x0000555555585443 in cmd_import_box (search_args=<optimized out>, info=0x555555832118, dest_user=<optimized out>, ctx=0x555555807d78) at doveadm-mail-import.c:142 #32 cmd_import_run (_ctx=0x555555807d78, user=0x55555581c688) at doveadm-mail-import.c:202 #33 0x000055555557fdb1 in doveadm_mail_next_user (ctx=ctx@entry=0x555555807d78, error_r=error_r@entry=0x7fffffffe0a0) at doveadm-mail.c:462 #34 0x0000555555580a0b in doveadm_mail_single_user (ctx=ctx@entry=0x555555807d78, error_r=error_r@entry=0x7fffffffe0a0) at doveadm-mail.c:492 #35 0x0000555555580af9 in doveadm_mail_cmd_exec (ctx=ctx@entry=0x555555807d78, wildcard_user=wildcard_user@entry=0x0) at doveadm-mail.c:653 #36 0x00005555555819ce in doveadm_cmd_ver2_to_mail_cmd_wrapper (cctx=<optimized out>) at doveadm-mail.c:1144 #37 0x0000555555592b7e in doveadm_cmd_run_ver2 (argc=12, argv=0x5555557f5ae8, cctx=cctx@entry=0x7fffffffe290) at doveadm-cmd.c:574 #38 0x0000555555592bd7 in doveadm_cmd_try_run_ver2 (cmd_name=<optimized out>, argc=<optimized out>, argv=<optimized out>, cctx=0x7fffffffe290) at doveadm-cmd.c:496 #39 0x000055555556fec1 in main (argc=<optimized out>, argv=<optimized out>) at doveadm.c:391

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