tree 281cc87a1fd838255b02e39887e49596d8a1fa58
parent 54c29c635ae91f5d75ced7bffeaa77ba37ca02bb
author Petr Holasek <pholasek@redhat.com> 1323346601 +0100
committer Ingo Molnar <mingo@elte.hu> 1323414214 +0100

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>