From mboxrd@z Thu Jan 1 00:00:00 1970 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 016FBC38A2B for ; Tue, 10 May 2022 13:24:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243005AbiEJN16 (ORCPT ); Tue, 10 May 2022 09:27:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242809AbiEJNVD (ORCPT ); Tue, 10 May 2022 09:21:03 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F2D22BAE6D; Tue, 10 May 2022 06:13:52 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C5254B81CE7; Tue, 10 May 2022 13:13:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24AAAC385A6; Tue, 10 May 2022 13:13:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652188429; bh=MKudbu7vHv3XJ8MbvM3xZDs4i7yKHou2tCtg+kv73Gc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WLxXs2SbKJHRWhr3pgJmM7Ji48XnkAQdPXe17c45sg7gPTx3jNWhvPIZG+nkUoIht nwnlEyAC/t2HVPGdSWSrSbFNCQPugbo71XeUhLQARL92wvJOO6qhY2jmGrpOidhnL+ iSHLdkD68a7rv7Z+Tkx/1vkqHpl6S6oJXEp4lzrc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yang Yingliang , Samuel Holland , Jernej Skrabec , Sasha Levin Subject: [PATCH 4.9 31/66] clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource() Date: Tue, 10 May 2022 15:07:21 +0200 Message-Id: <20220510130730.679342061@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220510130729.762341544@linuxfoundation.org> References: <20220510130729.762341544@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yang Yingliang [ Upstream commit f58ca215cda1975f77b2b762903684a3c101bec9 ] 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/resets") Signed-off-by: Yang Yingliang Reviewed-by: Samuel Holland Signed-off-by: Jernej Skrabec Link: https://lore.kernel.org/r/20220421134308.2885094-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin --- 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-sun9i-mmc.c index f69f9e8c6f38..7e9d1624032f 100644 --- a/drivers/clk/sunxi/clk-sun9i-mmc.c +++ b/drivers/clk/sunxi/clk-sun9i-mmc.c @@ -117,6 +117,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev) spin_lock_init(&data->lock); r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) + return -EINVAL; /* one clock/reset pair per word */ count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH); data->membase = devm_ioremap_resource(&pdev->dev, r); -- 2.35.1