thermal: core: fix some possible name leaks in error paths

In some error paths before device_register(), the names allocated
by dev_set_name() are not freed. Move dev_set_name() front to
device_register(), so the name can be freed while calling
put_device().

Fixes: 1dd7128b839f ("thermal/core: Fix null pointer dereference in thermal_release()")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index cc7dbcb..f17ab23 100644 (file)
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -894,10 +894,6 @@ __thermal_cooling_device_register(struct device_node *np,
        cdev->id = ret;
        id = ret;
 
-       ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
-       if (ret)
-               goto out_ida_remove;
-
        cdev->type = kstrdup(type ? type : "", GFP_KERNEL);
        if (!cdev->type) {
                ret = -ENOMEM;
@@ -917,6 +913,11 @@ __thermal_cooling_device_register(struct device_node *np,
                goto out_kfree_type;
 
        thermal_cooling_device_setup_sysfs(cdev);
+       ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
+       if (ret) {
+               thermal_cooling_device_destroy_sysfs(cdev);
+               goto out_kfree_type;
+       }
        ret = device_register(&cdev->device);
        if (ret)
                goto out_kfree_type;
@@ -1250,10 +1251,6 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
        tz->id = id;
        strscpy(tz->type, type, sizeof(tz->type));
 
-       result = dev_set_name(&tz->device, "thermal_zone%d", tz->id);
-       if (result)
-               goto remove_id;
-
        if (!ops->critical)
                ops->critical = thermal_zone_device_critical;
 
@@ -1276,6 +1273,11 @@ thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *t
        /* A new thermal zone needs to be updated anyway. */
        atomic_set(&tz->need_update, 1);
 
+       result = dev_set_name(&tz->device, "thermal_zone%d", tz->id);
+       if (result) {
+               thermal_zone_destroy_device_groups(tz);
+               goto remove_id;
+       }
        result = device_register(&tz->device);
        if (result)
                goto release_device;