linux-kernel - Re: [PATCH 00/20] ceph: Ceph distributed file system client v0.10

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Message-ID: <20090718012819.GE8150@sequoia.sous-sol.org>
Date:	Fri, 17 Jul 2009 18:28:19 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Sage Weil <sage@...dream.net>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/20] ceph: Ceph distributed file system client v0.10

* Sage Weil (sage@...dream.net) wrote:
> I don't always verify that things like element counts are "sane", though, 
> so there's currently the possibility of trying to allocate large chunks of 
> memory.

There's also the potential of allocating a small amount of memory w/ a
large element count if you overflow on multiply.  You should definitely
protect against this if you have such code in ceph client (kcalloc has
simple example defense).

thanks,
-chris
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