linux-kernel - Re: [PATCH RESEND] NUMA x86: add constraints check for nid parameters

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Message-Id: <20111201133451.5fc1ee7b.akpm@linux-foundation.org>
Date:	Thu, 1 Dec 2011 13:34:51 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Petr Holasek <pholasek@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	Anton Arapov <anton@...hat.com>
Subject: Re: [PATCH RESEND] NUMA x86: add constraints check for nid
 parameters

On Thu,  1 Dec 2011 12:45:07 +0100
Petr Holasek <pholasek@...hat.com> wrote:

> This patch adds constraints checks into __node_distance() and
> numa_set_distance() functions. If from or to parameters are
> lower than zero, it results into oops now.

Passing negative numbers into __node_distance() sounds like a bug in
the caller, and this patch will remove our means of detecting that bug.

Perhaps we need to be told more about this patch.  Is the bug
user-triggerable?  If so, how?  How was this fault triggered? 
Etcetera.

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