x86/numa: Add constraints check for nid parameters

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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>

...

This commit is contained in:

Petr Holasek 2011-12-08 13:16:41 +01:00 • committed by Ingo Molnar

parent 54c29c635a

commit 54eed6cb16

1 changed files with 6 additions and 4 deletions

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arch/x86/mm/numa.c

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