[Dovecot] Panic: Trying to allocate 2147483648 bytes

[David Halik]

Any thoughts on this Timo? Just wondering if you were able to reproduce 
the problem and saw the same behavior. We can look into it more if need 
be, but since I can replicate it on both Fedora and Solaris, I'm 
guessing it's a fundamental bug with how certain malformed emails are 
searched.

Thanks,
-Dave

David Halik wrote:
>
> Unfortunately, the patch didn't help, BUT I've discovered some very 
> interesting things along the way that I think you'd like to hear:
>
> 1) The problem stems from certain emails with odd or badly formed 
> characters.
>
> The reason I wasn't seeing it on one machine was because I was using a 
> different folder to test with. Once I moved over that folder the same 
> issue occurred. This got me thinking...
>
> 2) This is *not* a localized Solaris issue, I can replicate the 
> problem on my Fedora 10 i386 workstation with the stock F10 1.1.10 
> package.
>
> On Linux at least for me), however, it doesn't grow and grow, it just 
> dies and core dumps immediately once it hits an email it doesn't like:
>
> Mar 24 17:03:11 gunslinger IMAP(dhalik): : Panic: Trying to allocate 
> 2147483648 bytes
>
> Here is the backtrace from Fedora 10:
>
> http://pastebin.com/m66d94564
>
> To help you out I'm going to give you the email folder that I have 
> been using to replicate this. It's just a maildir format spam folder, 
> so no sensitive emails... just lots and lots of junk. =) You should be 
> able to replicate it without a problem.
>
> http://jla.rutgers.edu/~dhalik/spamfolder.tar.gz
>
> Steps to reproduce:
>
> $ /usr/sbin/dovecot --exec-mail imap
> * PREAUTH [CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES 
> MULTIAPPEND UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS 
> UIDPLUS LIST-EXTENDED I18NLEVEL=1 QUOTA] Logged in as dhalik
> 1 SELECT INBOX.AUTO-DELETED-SPAM
> * FLAGS (\Answered \Flagged \Deleted \Seen \Draft $Forwarded)
> * OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft 
> $Forwarded)] Flags permitted.
> * 1468 EXISTS
> * 2 RECENT
> * OK [UNSEEN 1] First unseen.
> * OK [UIDVALIDITY 1214858211] UIDs valid
> * OK [UIDNEXT 33722] Predicted next UID
> 1 OK [READ-WRITE] Select completed.
> 2 SEARCH BODY "berry"    Aborted (core dumped)
>
> Thanks again Timo,
> -Dave
>
>
> Timo Sirainen wrote:
>> On Sat, 2009-03-21 at 18:58 -0400, David Halik wrote:
>>  
>>> Mar 21 18:43:57 er0.rutgers.edu IMAP(dhalik): : [ID 107833 
>>> mail.crit] Panic: Trying to allocate 2147483648 bytes
>>>     
>>
>> Attached patch probably helps?
>>
>>   
>
>


-- 
================================
David Halik
System Administrator
OIT-CSS Rutgers University
dhalik at jla.rutgers.edu
================================