integer overflow at 2^32 in quota calculations

[Ondrej Sury]

> > Actually, it's an unsigned 32-bit value, so the limit is 4GB:
> > 
> >     https://bugzilla.andrew.cmu.edu/show_bug.cgi?id=2690
> > 
> > (Yes, we really do have users who are using more than 4GB of space.)
> 
> The limit is still 32-bit signed.  It needs to remain unsigned because 
> -1 is used to disable the quota.  But because the limit is set in KB, 
> the limit is actually 2TB.  All the patch does is use 64-bit for the 
> quota usage so we go beyond 4GB and track up to the limit without 
> overflowing.
> 
> 
> >>this will be different in 2.3
> > 
> > 
> > Yes, Ken fixed it on 2004-08-09 in the cyrus-imapd-2_3 branch.
> > 
> > Ken, off the top of your head, can you think of any gotchas in
> > backporting your quota calculation fixes to 2.2?  (I don't want to
> > wait until 2.3 for the fix, as this bug is currently biting us.)
> 
> I don't see any problem, as the space for the extra 4-bytes is already 
> carved out in cyrus.index.  You can probably use 'cvsps' to create a 
> patchset.  If you don't have it, I can make one for you.

Ken, would you be so kind to generate patchset (and maybe attach it to
mentioned bug report)?

Thanks,
-- 
Ondrej Sury <ondrej at sury.org>

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