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[PATCH] 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: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter 2006-04-10 22:52:47 -07:00 committed by Linus Torvalds
parent 29ff2db551
commit 54404e72cd
1 changed files with 1 additions and 1 deletions
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2
drivers/base/node.c
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@ -106,7 +106,7 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
other_node = 0; other_node = 0;
for (i = 0; i < MAX_NR_ZONES; i++) { for (i = 0; i < MAX_NR_ZONES; i++) {
struct zone *z = &pg->node_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); struct per_cpu_pageset *ps = zone_pcp(z,cpu);
numa_hit += ps->numa_hit; numa_hit += ps->numa_hit;
numa_miss += ps->numa_miss; numa_miss += ps->numa_miss;