Dovecot panic for one user after upgrading

[Aki Tuomi]

Hi!

The problem seems to occur during mail index processing. Can you try
deleting all dovecot.index* files under this user's maildir. There might
be some more under various folders.

Aki


On 03.01.2018 08:51, Owen B. Mehegan wrote:
> The EC2 instance that I run Dovecot on (personal mail server) was
> forcibly "retired" yesterday, and as a result I ended up rebuilding
> from backups. In the process I switched from Ubuntu Precise to Ubuntu
> Xenial (12.04 to 16.04), and this in turn caused me to upgrade Dovecot
> from 2.0.19 to 2.0.22. Now, although accessing mail seems to work OK
> using my various clients, I am seeing these errors in my logs:
>
> Jan  3 05:56:58 -- dovecot: imap(owen): Panic: file
> mail-index-sync-keywords.c: line 227 (keywords_update_records):
> assertion failed: (data_offset >= sizeof(struct mail_index_record))
> Jan  3 05:56:58 -- dovecot: imap(owen): Error: Raw backtrace:
> /usr/lib/dovecot/libdovecot.so.0(+0x7aee2) [0x7fe9c08dbee2] ->
> /usr/lib/dovecot/libdovecot.so.0(+0x7afcd) [0x7fe9c08dbfcd] ->
> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fe9c0880a61] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_keywords+0x828)
> [0x7fe9c0c1fdd8] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_record+0xef)
> [0x7fe9c0c2079f] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_map+0x238)
> [0x7fe9c0c21758] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_map+0x71)
> [0x7fe9c0c18de1] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xd28fd)
> [0x7fe9c0c2e8fd] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xd2f03)
> [0x7fe9c0c2ef03] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_open+0x78)
> [0x7fe9c0c2efe8] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_mailbox_open+0x92)
> [0x7fe9c0c08042] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5e8d2)
> [0x7fe9c0bba8d2] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x5e9b8)
> [0x7fe9c0bba9b8] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x37b86)
> [0x7fe9c0b93b86] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_open+0x20)
> [0x7fe9c0b93d00] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_get_status+0x20)
> [0x7fe9c0c073b0] ->
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x37)
> [0x7fe9c0b940e7] -> dovecot/imap(imap_status_get+0x77)
> [0x55d3b4c3f977] -> dovecot/imap(cmd_status+0x1a9) [0x55d3b4c32969] ->
> dovecot/imap(command_exec+0x9c) [0x55d3b4c3806c] ->
> dovecot/imap(+0x193e2) [0x55d3b4c363e2] -> dovecot/imap(+0x1946c)
> [0x55d3b4c3646c] -> dovecot/imap(client_handle_input+0x165)
> [0x55d3b4c36825] -> dovecot/imap(client_input+0x82) [0x55d3b4c36db2]
> -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x4c)
> [0x7fe9c08efc6c] ->
> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x101)
> [0x7fe9c08f1101] ->
> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x25)
> [0x7fe9c08efcf5] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38)
> [0x7fe9c08efe98]
> Jan  3 05:56:59 -- dovecot: imap(owen): Fatal: master: service(imap):
> child 18289 killed with signal 6 (core dumped)
>
> I have deleted the dovecot.* files in the Maildir for all users (did
> this while Dovecot was stopped, then started it again), but the errors
> persist. They are especially frequent for one particular user. I can't
> figure out where the core file is, it doesn't seem to be in my home or
> in /var/run/dovecot
>
> Here's my dovecot -n output:
>
> # 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.4.13 (7b14904)
> # OS: Linux 4.4.0-1043-aws x86_64 Ubuntu 16.04.3 LTS
> mail_location = maildir:~/Maildir
> namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox "Sent Messages" {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     special_use = \Trash
>   }
>   prefix =
> }
> passdb {
>   driver = pam
> }
> protocols = " imap"
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0660
>     user = postfix
>   }
> }
> ssl_cert = </etc/letsencrypt/live/mydomain/cert.pem
> ssl_key = </etc/letsencrypt/live/mydomain/privkey.pem
> userdb {
>   driver = passwd
> }
>
> Thanks in advance for any support you can offer!