From patchwork Mon Feb 18 10:15:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 10817673 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6100D1399 for ; Mon, 18 Feb 2019 10:17:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4F8692A378 for ; Mon, 18 Feb 2019 10:17:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 437242A386; Mon, 18 Feb 2019 10:17:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 015B62A3E4 for ; Mon, 18 Feb 2019 10:17:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729907AbfBRKQy (ORCPT ); Mon, 18 Feb 2019 05:16:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:60770 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727004AbfBRKQx (ORCPT ); Mon, 18 Feb 2019 05:16:53 -0500 Received: from PC-kkoz.proceq.com (unknown [213.160.61.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7B42A217D7; Mon, 18 Feb 2019 10:16:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550485012; bh=kS/J/urVPv8KaqJyXGSwGWNgmhUo4x7oiE8lPhxGrNU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=d4p1zVd2V8lWfqGbIHW9eNKd52fEGSLClTla5v/iFj5yUyn0NPXi33mYCKM+bpGBF jXcl4kGQrgEWx9RO8JGV9PMjQiy33ElDHanqPtEa8d4KmARuIfwC3lZuzaZUjDRCmy QJPSG1rnwFyBoh4+jzemRNioaJOBn8JPHTXsFWjk= From: Krzysztof Kozlowski To: Russell King , Mark Brown , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Greg Kroah-Hartman , "Rafael J. Wysocki" , Sylwester Nawrocki , Tomasz Figa , Chanwoo Choi , Michael Turquette , Stephen Boyd , Kukjin Kim , Krzysztof Kozlowski , Andy Gross , David Brown , Srinivas Kandagatla , linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org Subject: [RFC 1/4] clk: samsung: exynos5: Fix possible NULL pointer exception on platform_device_alloc() failure Date: Mon, 18 Feb 2019 11:15:57 +0100 Message-Id: <1550484960-2392-2-git-send-email-krzk@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1550484960-2392-1-git-send-email-krzk@kernel.org> References: <1550484960-2392-1-git-send-email-krzk@kernel.org> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP During initialization of subdevices if platform_device_alloc() failed, returned NULL pointer will be later dereferenced. Add proper error paths to exynos5_clk_register_subcmu(). The return value of this function is still ignored because at this stage of init there is nothing we can do. Signed-off-by: Krzysztof Kozlowski --- drivers/clk/samsung/clk-exynos5-subcmu.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/clk/samsung/clk-exynos5-subcmu.c b/drivers/clk/samsung/clk-exynos5-subcmu.c index 93306283d764..d07ef26bd052 100644 --- a/drivers/clk/samsung/clk-exynos5-subcmu.c +++ b/drivers/clk/samsung/clk-exynos5-subcmu.c @@ -136,15 +136,21 @@ static int __init exynos5_clk_register_subcmu(struct device *parent, { struct of_phandle_args genpdspec = { .np = pd_node }; struct platform_device *pdev; + int ret; pdev = platform_device_alloc(info->pd_name, -1); + if (!pdev) + return -ENOMEM; + pdev->dev.parent = parent; pdev->driver_override = "exynos5-subcmu"; platform_set_drvdata(pdev, (void *)info); of_genpd_add_device(&genpdspec, &pdev->dev); - platform_device_add(pdev); + ret = platform_device_add(pdev); + if (ret) + platform_device_put(pdev); - return 0; + return ret; } static int __init exynos5_clk_probe(struct platform_device *pdev)