[Dovecot] 1.1.3 panics

[David McBride]

Dean Brooks wrote:
> Hi,
> 
> Installed Dovecot 1.1.3 today and started receiving panic errors on a
> few of our users:
> 
>   dovecot: [ID 107833 mail.crit] Panic: IMAP(xx): file mail-index-transaction-view.c: line 204: unreached

Hi,

I am also seeing this problem.  I haven't managed to generate a core 
dump yet, however I did get more logging in mail.err:

Sep  4 13:25:36 songbird dovecot: IMAP(user): Raw backtrace: imap 
[0x486942] -> imap [0x4869b3] -> imap [0x486026] -> imap [0x46775c] -> 
imap(mail_index_lookup_ext_full+0x17) [0x469fc7] -> 
imap(mail_index_lookup_ext+0x17) [0x469fe7] -> 
imap(mbox_file_lookup_offset+0x33) [0x4382f3] -> 
imap(mbox_file_seek+0x2e) [0x43837e] -> imap [0x439c98] -> imap 
[0x43a022] -> imap [0x43a149] -> 
/usr/lib/dovecot/modules/imap/lib10_quota_plugin.so(quota_try_alloc+0x29) 
[0x7f706e92b6b9] -> /usr/lib/dovecot/modules/imap/lib10_quota_plugin.so 
[0x7f706e92ea9b] -> imap [0x4186fd] -> imap [0x418e9e] -> 
imap(io_loop_handler_run+0xf8) [0x48d6d8] -> imap(io_loop_run+0x1d) 
[0x48c7fd] -> imap(main+0x3c2) [0x425b92] -> 
/lib/libc.so.6(__libc_start_main+0xf4) [0x7f706eb511c4] -> imap [0x418449]
Sep  4 13:25:36 songbird dovecot: child 5531 (imap) killed with signal 6

We were also using the quota plugin to access mailboxes via NFS.  We 
have since disabled this plugin, and are no-longer observing this fault.

(We have found a way to reliably trigger this particular fault.  Using 
Alpine, if a user deletes their postponed-messages IMAP folder, and then 
attempts to postpone a message, the IMAP process will crash shortly 
after the postponed-messages folder is recreated.)

Cheers,
David
-- 
David McBride <dwm at tastycake.net>
               <dwm at doc.ic.ac.uk>