[PATCH V2 1/1] mm/slub: release kobject if kobject_init_and_add failed in sysfs_slab_add

[Xin Hao <xhao@linux.alibaba.com>]

In kobject_init_and_add() function, the refcount is setted by calling
kobject_init() function, regardless of whether the return value is zero
or not, therefore, we must call kobject_del(&s->kobj) to prevent memory
of s->kobj is leaked.

Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
---
 mm/slub.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index b1281b8654bd..940a3f52e07c 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5981,19 +5981,18 @@ static int sysfs_slab_add(struct kmem_cache *s)
 
 	err = sysfs_create_group(&s->kobj, &slab_attr_group);
 	if (err)
-		goto out_del_kobj;
+		goto out;
 
 	if (!unmergeable) {
 		/* Setup first alias */
 		sysfs_slab_alias(s, s->name);
 	}
+	return err;
 out:
 	if (!unmergeable)
 		kfree(name);
+	kobject_put(&s->kobj);
 	return err;
-out_del_kobj:
-	kobject_del(&s->kobj);
-	goto out;
 }
 
 void sysfs_slab_unlink(struct kmem_cache *s)
-- 
2.31.0