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uio: fix memory leak 

we have to call kobject_put() to clean up the kobject after function
kobject_init(), kobject_add(), or kobject_uevent() is called.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Cong Ding 2013-10-25 00:25:53 -07:00 committed by Greg Kroah-Hartman
parent 7c65e29250
commit 75f0aef622
1 changed files with 10 additions and 6 deletions
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16
drivers/uio/uio.c
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@ -288,13 +288,13 @@ static int uio_dev_add_attributes(struct uio_device *idev)
}
map = kzalloc(sizeof(*map), GFP_KERNEL);
if (!map)
goto err_map;
goto err_map_kobj;
kobject_init(&map->kobj, &map_attr_type);
map->mem = mem;
mem->map = map;
ret = kobject_add(&map->kobj, idev->map_dir, "map%d", mi);
if (ret)
goto err_map;
goto err_map_kobj;
ret = kobject_uevent(&map->kobj, KOBJ_ADD);
if (ret)
goto err_map;
@ -313,14 +313,14 @@ static int uio_dev_add_attributes(struct uio_device *idev)
}
portio = kzalloc(sizeof(*portio), GFP_KERNEL);
if (!portio)
goto err_portio;
goto err_portio_kobj;
kobject_init(&portio->kobj, &portio_attr_type);
portio->port = port;
port->portio = portio;
ret = kobject_add(&portio->kobj, idev->portio_dir,
"port%d", pi);
if (ret)
goto err_portio;
goto err_portio_kobj;
ret = kobject_uevent(&portio->kobj, KOBJ_ADD);
if (ret)
goto err_portio;
@ -329,14 +329,18 @@ static int uio_dev_add_attributes(struct uio_device *idev)
return 0;
err_portio:
for (pi--; pi >= 0; pi--) {
pi--;
err_portio_kobj:
for (; pi >= 0; pi--) {
port = &idev->info->port[pi];
portio = port->portio;
kobject_put(&portio->kobj);
}
kobject_put(idev->portio_dir);
err_map:
for (mi--; mi>=0; mi--) {
mi--;
err_map_kobj:
for (; mi >= 0; mi--) {
mem = &idev->info->mem[mi];
map = mem->map;
kobject_put(&map->kobj);