[Dovecot] Panic: IMAP: Trying to allocate 2273345672 bytes

[Mark Zealey]

Hi, we're running dovecot 1.1.2 (centos5 32-bit rpm from atrpms) havn't
had any real issues with it, but today it looks like an index has become
badly corrupted. We're seeing this in the logs every time we log in to a
particular account:

2008-09-10T11:56:07+01:00 mail8 dovecot: Panic: IMAP(xxx): Trying to
allocate 2273345672 bytes
2008-09-10T11:56:07+01:00 mail8 dovecot: IMAP(xxx): Raw backtrace:
/usr/libexec/dovecot/imap [0x80d0310] -> /usr/libexec/dovecot/imap
[0x80d036a] -> /usr/libexec/dovecot/imap [0x80cfc2c] ->
/usr/libexec/dovecot/imap [0x80d966c] -> /usr/libexec/dovecot/imap
[0x80ce750] -> /usr/libexec/dovecot/imap(buffer_create_dynamic+0x30)
[0x80ce800] ->
/usr/libexec/dovecot/imap(mail_index_sync_ext_intro+0x4d5) [0x80c0145]
-> /usr/libexec/dovecot/imap(mail_index_sync_record+0x135) [0x80b11b5]
-> /usr/libexec/dovecot/imap(mail_index_sync_map+0x269) [0x80b1d79] ->
/usr/libexec/dovecot/imap(mail_index_map+0x38e) [0x80ab17e] ->
/usr/libexec/dovecot/imap [0x80a825c] ->
/usr/libexec/dovecot/imap(mail_index_open+0x1f4) [0x80a8554] ->
/usr/libexec/dovecot/imap(index_storage_mailbox_open+0x79) [0x809ca39]
-> /usr/libexec/dovecot/imap [0x806d339] -> /usr/libexec/dovecot/imap
[0x806e1fa] -> /usr/libexec/dovecot/imap(mailbox_open+0x49) [0x80a09e9]
-> /usr/libexec/dovecot/imap(cmd_select_full+0xa9) [0x805e459] ->
/usr/libexec/dovecot/imap(cmd_select+0x19) [0x805e629] ->
/usr/libexec/dovecot/imap [0x805fdec] -> /usr/libexec/dovecot/imap
[0x805fe95] -> /usr/libexec/dovecot/imap [0x8060655] ->
/usr/libexec/dovecot/imap(client_input+0x5e) [0x806086e] ->
/usr/libexec/dovecot/imap(io_loop_handler_run+0x100) [0x80d7c80] ->
/usr/libexec/dovecot/imap(io_loop_run+0x28) [0x80d6df8] ->
/usr/libexec/dovecot/imap(main+0x4ac) [0x80683ec] ->
/lib/libc.so.6(__libc_start_main+0xdc) [0x8c8dec] ->
/usr/libexec/dovecot/imap [0x805a171]

This account has about 12 mails in cur, nothing in new. Shortly before
this corruption started, I saw entries like:

2008-09-10T10:20:15+01:00 mail9 dovecot: IMAP(xxx):
/var/spool/mail/supplier_2/xxx/Maildir/dovecot-uidlist: Duplicate file
entry at line 2:
1217249435.M999046P25889.mail7.atlas.pipex.net,W=2673:2,S (uid 1 -> 14)
...

For all the mails in the cur directory.

About our setup: These are on an nfs-mounted file system. It's shared
between two computers and connections are randomly redirected to either
box; so potentially it could be an nfs type corruption issue. Timo, I'll
send you a tarball of the dovecot* files off-list

Thanks,

Mark

--
Mark Zealey -- Shared Hosting Team Leader
Product Development * Webfusion
123-reg.co.uk, webfusion.co.uk, donhost.co.uk, supanames.co.uk

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