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authorCyrill Gorcunov <gorcunov@gmail.com>2008-03-02 15:28:24 -0500
committerChristoph Lameter <clameter@sgi.com>2008-03-03 15:22:32 -0500
commit62e5c4b4d6351707346695fd9e151b6cda85cbe1 (patch)
tree66a8e4a842d4bcd2f87e28bb2faac19e75e355b3 /mm/slub.c
parentf619cfe1bda809a97c407f4c723eb3235ecd64e5 (diff)
slub: fix possible NULL pointer dereference
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>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c
index ecacacdce9d7..0863fd38a5ce 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3564,8 +3564,8 @@ enum slab_stat_type {
3564#define SO_CPU (1 << SL_CPU) 3564#define SO_CPU (1 << SL_CPU)
3565#define SO_OBJECTS (1 << SL_OBJECTS) 3565#define SO_OBJECTS (1 << SL_OBJECTS)
3566 3566
3567static unsigned long show_slab_objects(struct kmem_cache *s, 3567static ssize_t show_slab_objects(struct kmem_cache *s,
3568 char *buf, unsigned long flags) 3568 char *buf, unsigned long flags)
3569{ 3569{
3570 unsigned long total = 0; 3570 unsigned long total = 0;
3571 int cpu; 3571 int cpu;
@@ -3575,6 +3575,8 @@ static unsigned long show_slab_objects(struct kmem_cache *s,
3575 unsigned long *per_cpu; 3575 unsigned long *per_cpu;
3576 3576
3577 nodes = kzalloc(2 * sizeof(unsigned long) * nr_node_ids, GFP_KERNEL); 3577 nodes = kzalloc(2 * sizeof(unsigned long) * nr_node_ids, GFP_KERNEL);
3578 if (!nodes)
3579 return -ENOMEM;
3578 per_cpu = nodes + nr_node_ids; 3580 per_cpu = nodes + nr_node_ids;
3579 3581
3580 for_each_possible_cpu(cpu) { 3582 for_each_possible_cpu(cpu) {