From nobody Tue Jun 16 01:37:39 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B98ECC433F5 for ; Thu, 21 Apr 2022 13:31:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385647AbiDUNdz (ORCPT ); Thu, 21 Apr 2022 09:33:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232058AbiDUNdu (ORCPT ); Thu, 21 Apr 2022 09:33:50 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F8691BE94; Thu, 21 Apr 2022 06:30:59 -0700 (PDT) Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Kkdh25HYzzdZLW; Thu, 21 Apr 2022 21:30:10 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm500024.china.huawei.com (7.185.36.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 21 Apr 2022 21:30:57 +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 15.1.2375.24; Thu, 21 Apr 2022 21:30:56 +0800 From: Yang Yingliang To: , , , CC: , Subject: [PATCH] clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() Date: Thu, 21 Apr 2022 21:43:08 +0800 Message-ID: <20220421134308.2885094-1-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.103.91] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm500007.china.huawei.com (7.185.36.183) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Fixes: 7a6fca879f59 ("clk: sunxi: Add driver for A80 MMC config clocks/rese= ts") Signed-off-by: Yang Yingliang Reviewed-by: Samuel Holland --- drivers/clk/sunxi/clk-sun9i-mmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/sunxi/clk-sun9i-mmc.c b/drivers/clk/sunxi/clk-sun9= i-mmc.c index 542b31d6e96d..636bcf2439ef 100644 --- a/drivers/clk/sunxi/clk-sun9i-mmc.c +++ b/drivers/clk/sunxi/clk-sun9i-mmc.c @@ -109,6 +109,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platfo= rm_device *pdev) spin_lock_init(&data->lock); =20 r =3D platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) + return -EINVAL; /* one clock/reset pair per word */ count =3D DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH); data->membase =3D devm_ioremap_resource(&pdev->dev, r); --=20 2.25.1