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From:   Yang Yingliang <yangyingliang@huawei.com>
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Subject: [PATCH 02/11] kset: add null pointer check in kset_put()
Date:   Fri, 21 Oct 2022 10:20:53 +0800
Message-ID: <20221021022102.2231464-3-yangyingliang@huawei.com>
In-Reply-To: <20221021022102.2231464-1-yangyingliang@huawei.com>
References: <20221021022102.2231464-1-yangyingliang@huawei.com>
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Precedence: bulk

kset_put() can be called from drivers, add null pointer
check to make it more robust.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 include/linux/kobject.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 57fb972fea05..e81de8ba41a2 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -195,7 +195,8 @@ static inline struct kset *kset_get(struct kset *k)
 
 static inline void kset_put(struct kset *k)
 {
-	kobject_put(&k->kobj);
+	if (k)
+		kobject_put(&k->kobj);
 }
 
 static inline const struct kobj_type *get_ktype(struct kobject *kobj)
-- 
2.25.1