From: Petr Holasek <pholasek@redhat.com>
Date: Thu, 8 Dec 2011 12:16:41 +0000 (+0100)
Subject: x86/numa: Add constraints check for nid parameters
X-Git-Tag: v3.3-rc1~96^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54eed6cb16ec315565aaaf8e34252ca253a68b7b;p=pandora-kernel.git

x86/numa: Add constraints check for nid parameters

This patch adds constraint checks to the numa_set_distance()
function.

When the check triggers (this should not happen normally) it
emits a warning and avoids a store to a negative index in
numa_distance[] array - i.e. avoids memory corruption.

Negative ids can be passed when the pxm-to-nids mapping is not
properly filled while parsing the SRAT.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Anton Arapov <anton@redhat.com>
Link: http://lkml.kernel.org/r/20111208121640.GA2229@dhcp-27-244.brq.redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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