From: Christoph Lameter <[email protected]>
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 <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/base/node.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.16.1.orig/drivers/base/node.c
+++ linux-2.6.16.1/drivers/base/node.c
@@ -106,7 +106,7 @@ static ssize_t node_read_numastat(struct
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;
--
-
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