From patchwork Fri Nov 25 02:12:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: shangxiaojing X-Patchwork-Id: 628979 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 6294AC43217 for ; Fri, 25 Nov 2022 02:14:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229518AbiKYCOO (ORCPT ); Thu, 24 Nov 2022 21:14:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229471AbiKYCON (ORCPT ); Thu, 24 Nov 2022 21:14:13 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13BCC23E84 for ; Thu, 24 Nov 2022 18:14:11 -0800 (PST) Received: from kwepemi500016.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4NJJLm2GMyzmW8p; Fri, 25 Nov 2022 10:13:36 +0800 (CST) Received: from huawei.com (10.175.100.227) by kwepemi500016.china.huawei.com (7.221.188.220) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Fri, 25 Nov 2022 10:14:09 +0800 From: Shang XiaoJing To: , , , , CC: Subject: [PATCH] phy: usb: sunplus: Fix potential null-ptr-deref in sp_usb_phy_probe() Date: Fri, 25 Nov 2022 10:12:22 +0800 Message-ID: <20221125021222.25687-1-shangxiaojing@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.175.100.227] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemi500016.china.huawei.com (7.221.188.220) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org sp_usb_phy_probe() will call platform_get_resource_byname() that may fail and return NULL. devm_ioremap() will use usbphy->moon4_res_mem->start as input, which may causes null-ptr-deref. Check the ret value of platform_get_resource_byname() to avoid the null-ptr-deref. Fixes: 99d9ccd97385 ("phy: usb: Add USB2.0 phy driver for Sunplus SP7021") Signed-off-by: Shang XiaoJing --- drivers/phy/sunplus/phy-sunplus-usb2.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/phy/sunplus/phy-sunplus-usb2.c b/drivers/phy/sunplus/phy-sunplus-usb2.c index b932087c55b2..6816b7d2318d 100644 --- a/drivers/phy/sunplus/phy-sunplus-usb2.c +++ b/drivers/phy/sunplus/phy-sunplus-usb2.c @@ -254,6 +254,9 @@ static int sp_usb_phy_probe(struct platform_device *pdev) return PTR_ERR(usbphy->phy_regs); usbphy->moon4_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "moon4"); + if (!usbphy->moon4_res_mem) + return -EINVAL; + usbphy->moon4_regs = devm_ioremap(&pdev->dev, usbphy->moon4_res_mem->start, resource_size(usbphy->moon4_res_mem)); if (IS_ERR(usbphy->moon4_regs))