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[PATCH] Fix NULL pointer dereference in node_read_numastat()

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Fix NULL pointer dereference in node_read_numastat()

zone_pcp() only returns valid values if the processor is online.

Change node_read_numastat() to only scan online processors.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Christoph Lameter
2006-04-03 20:11:57 +10:00
committed by Greg Kroah-Hartman
parent 9f45b01aa6
commit 781fe700a8
1 changed files with 1 additions and 1 deletions
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drivers/base/node.c
+1 -1
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@@ -106,7 +106,7 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
other_node = 0;
for (i = 0; i < MAX_NR_ZONES; i++) {
struct zone *z = &pg->node_zones[i];
for (cpu = 0; cpu < NR_CPUS; cpu++) {
for_each_online_cpu(cpu) {
struct per_cpu_pageset *ps = zone_pcp(z,cpu);
numa_hit += ps->numa_hit;
numa_miss += ps->numa_miss;