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[2620:137:e000::1:20]) by mx.google.com with ESMTP id dm4-20020a170907948400b007894b9de062si5118999ejc.631.2022.10.20.19.23.28; Thu, 20 Oct 2022 19:23:54 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229739AbiJUCWo (ORCPT + 99 others); Thu, 20 Oct 2022 22:22:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229746AbiJUCWl (ORCPT ); Thu, 20 Oct 2022 22:22:41 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86D5B1F810F for ; Thu, 20 Oct 2022 19:22:40 -0700 (PDT) Received: from dggpemm500021.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Mtp7V36sMzpVfQ; Fri, 21 Oct 2022 10:19:18 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm500021.china.huawei.com (7.185.36.109) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Fri, 21 Oct 2022 10:22:38 +0800 Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Fri, 21 Oct 2022 10:22:37 +0800 From: Yang Yingliang To: , , , , , , CC: , , , , , , , , , , , , , , , 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> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221021022102.2231464-1-yangyingliang@huawei.com> References: <20221021022102.2231464-1-yangyingliang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747262147686581724?= X-GMAIL-MSGID: =?utf-8?q?1747262147686581724?= kset_put() can be called from drivers, add null pointer check to make it more robust. Signed-off-by: Yang Yingliang --- 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)