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IB/cma: allocating too much memory in make_cma_ports() 

The issue here is that there is a cut and paste bug.  When we allocate
cma_dev_group->default_ports_group we use "sizeof(*cma_dev_group->ports)"
instead of "sizeof(*cma_dev_group->default_ports_group)".

We're bumping up against the 80 character limit so I introduced a new
local pointer "ports_group" to get around that.

Fixes: 045959db65 ('IB/cma: Add configfs for rdma_cm')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Dan Carpenter 2016-01-12 12:29:21 +03:00 committed by Doug Ledford
parent bc1251e6d9
commit a7d0e959fa
1 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/infiniband/core/cma_configfs.c
View File

@ -158,6 +158,7 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
unsigned int i;
unsigned int ports_num;
struct cma_dev_port_group *ports;
struct config_group **ports_group;
int err;
ibdev = cma_get_ib_dev(cma_dev);
@ -168,12 +169,9 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
ports_num = ibdev->phys_port_cnt;
ports = kcalloc(ports_num, sizeof(*cma_dev_group->ports),
GFP_KERNEL);
ports_group = kcalloc(ports_num + 1, sizeof(*ports_group), GFP_KERNEL);
cma_dev_group->default_ports_group = kcalloc(ports_num + 1,
sizeof(*cma_dev_group->ports),
GFP_KERNEL);
if (!ports || !cma_dev_group->default_ports_group) {
if (!ports || !ports_group) {
err = -ENOMEM;
goto free;
}
@ -187,15 +185,16 @@ static int make_cma_ports(struct cma_dev_group *cma_dev_group,
config_group_init_type_name(&ports[i].group,
port_str,
&cma_port_group_type);
cma_dev_group->default_ports_group[i] = &ports[i].group;
ports_group[i] = &ports[i].group;
}
cma_dev_group->default_ports_group[i] = NULL;
ports_group[i] = NULL;
cma_dev_group->default_ports_group = ports_group;
cma_dev_group->ports = ports;
return 0;
free:
kfree(ports);
kfree(cma_dev_group->default_ports_group);
kfree(ports_group);
cma_dev_group->ports = NULL;
cma_dev_group->default_ports_group = NULL;
return err;