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slub: fix possible NULL pointer dereference

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This patch fix possible NULL pointer dereference if kzalloc
failed. To be able to return proper error code the function
return type is changed to ssize_t (according to callees and
sysfs definitions).

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
This commit is contained in:
Cyrill Gorcunov 2008-03-02 23:28:24 +03:00 committed by Christoph Lameter
parent f619cfe1bd
commit 62e5c4b4d6
1 changed files with 4 additions and 2 deletions
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6
mm/slub.c
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@ -3564,8 +3564,8 @@ enum slab_stat_type {
#define SO_CPU (1 << SL_CPU)
#define SO_OBJECTS (1 << SL_OBJECTS)
static unsigned long show_slab_objects(struct kmem_cache *s,
char *buf, unsigned long flags)
static ssize_t show_slab_objects(struct kmem_cache *s,
char *buf, unsigned long flags)
{
unsigned long total = 0;
int cpu;
@ -3575,6 +3575,8 @@ static unsigned long show_slab_objects(struct kmem_cache *s,
unsigned long *per_cpu;
nodes = kzalloc(2 * sizeof(unsigned long) * nr_node_ids, GFP_KERNEL);
if (!nodes)
return -ENOMEM;
per_cpu = nodes + nr_node_ids;
for_each_possible_cpu(cpu) {