Commit 54404e72 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
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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: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 29ff2db5

drivers/base/node.c

+1 −1
Original line number Diff line number Diff line
@@ -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;