linux-kernel - Re: [PATCH v4 2/2] bsearch: prevent overflow when computing middle comparison element

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Message-Id: <200911141012.19050.rusty@rustcorp.com.au>
Date:	Sat, 14 Nov 2009 10:12:18 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Thiago Farina <tfransosi@...il.com>
Cc:	André Goddard Rosa <andre.goddard@...il.com>,
	tabbott@...lice.com, alan-jenkins@...fmail.co.uk,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] bsearch: prevent overflow when computing middle comparison element

On Sat, 14 Nov 2009 01:33:04 am Thiago Farina wrote:
> Hi Rusty,
> 
> On Thu, Nov 12, 2009 at 11:06 AM, Rusty Russell <rusty@...tcorp.com.au> wrote:
> > On Wed, 11 Nov 2009 01:30:25 am André Goddard Rosa wrote:
> >> It's really difficult to occur in practice because the sum of the lower
> >> and higher limits must overflow an int variable, but it can occur when
> >> working with large arrays. We'd better safe than sorry by avoiding this
> >> overflow situation when computing the middle element for comparison.
> >
> > I applied all these, after testing.  In future would have been nice for you
> > to have posted a test patch so I didn't have make my own...
> 
> Where did you apply this patch?

To my kernel series, which means it is now in linux-next.

Hope that helps,
Rusty.
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