linux-kernel - [PATCH 02/11] kset: add null pointer check in kset

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Message-ID: <20221021022102.2231464-3-yangyingliang@huawei.com>
Date:   Fri, 21 Oct 2022 10:20:53 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <qemu-devel@...gnu.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-erofs@...ts.ozlabs.org>, <ocfs2-devel@....oracle.com>,
        <linux-mtd@...ts.infradead.org>, <amd-gfx@...ts.freedesktop.org>
CC:     <gregkh@...uxfoundation.org>, <rafael@...nel.org>, <somlo@....edu>,
        <mst@...hat.com>, <jaegeuk@...nel.org>, <chao@...nel.org>,
        <hsiangkao@...ux.alibaba.com>, <huangjianan@...o.com>,
        <mark@...heh.com>, <jlbec@...lplan.org>,
        <joseph.qi@...ux.alibaba.com>, <akpm@...ux-foundation.org>,
        <alexander.deucher@....com>, <luben.tuikov@....com>,
        <richard@....at>, <liushixin2@...wei.com>
Subject: [PATCH 02/11] kset: add null pointer check in kset_put()

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

Signed-off-by: Yang Yingliang <yangyingliang@...wei.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