lib : kobject: fix refcount imblance on kobject_rename

the kobj refcount increased by kobject_get should be released before
error return, otherwise lead to a memory leak.

Signed-off-by: Lin Yi <teroincn@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/kobject.c b/lib/kobject.c
index f2ccdbac8ed9..83198cb37d8d 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -498,8 +498,10 @@ int kobject_rename(struct kobject *kobj, const char *new_name)
         kobj = kobject_get(kobj);
         if (!kobj)
                 return -EINVAL;
-        if (!kobj->parent)
+        if (!kobj->parent) {
+                kobject_put(kobj);
                 return -EINVAL;
+        }
 
         devpath = kobject_get_path(kobj, GFP_KERNEL);
         if (!devpath) {