From patchwork Fri Feb 23 12:51:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrice Gasnier X-Patchwork-Id: 10237569 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 17C8F602DC for ; Fri, 23 Feb 2018 12:52:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 090A529579 for ; Fri, 23 Feb 2018 12:52:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F1D652957B; Fri, 23 Feb 2018 12:52:19 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham 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 3F36B29579 for ; Fri, 23 Feb 2018 12:52:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751626AbeBWMwS (ORCPT ); Fri, 23 Feb 2018 07:52:18 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:53978 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751586AbeBWMwQ (ORCPT ); Fri, 23 Feb 2018 07:52:16 -0500 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w1NCnG2V015307; Fri, 23 Feb 2018 13:51:23 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2g9bpka35t-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 23 Feb 2018 13:51:23 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id A052038; Fri, 23 Feb 2018 12:51:22 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag5node3.st.com [10.75.127.15]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 89C534DB7; Fri, 23 Feb 2018 12:51:22 +0000 (GMT) Received: from localhost (10.75.127.46) by SFHDAG5NODE3.st.com (10.75.127.15) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 23 Feb 2018 13:51:22 +0100 From: Fabrice Gasnier To: CC: , , , , , , , , , , Subject: [PATCH 6/7] iio: adc: stm32-dfsdm: add check on max filter id Date: Fri, 23 Feb 2018 13:51:00 +0100 Message-ID: <1519390261-25453-7-git-send-email-fabrice.gasnier@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1519390261-25453-1-git-send-email-fabrice.gasnier@st.com> References: <1519390261-25453-1-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG1NODE3.st.com (10.75.127.3) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-02-23_04:, , signatures=0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP reg property should be checked against number of available filters. BTW, dfsdm->num_fls wasn't used. But it can be used for this purpose. This prevents using data out of allocated dfsdm->fl_list array. Signed-off-by: Fabrice Gasnier --- drivers/iio/adc/stm32-dfsdm-adc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 57bcb45..1b78bec 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -1111,8 +1111,8 @@ static int stm32_dfsdm_adc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, adc); ret = of_property_read_u32(dev->of_node, "reg", &adc->fl_id); - if (ret != 0) { - dev_err(dev, "Missing reg property\n"); + if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) { + dev_err(dev, "Missing or bad reg property\n"); return -EINVAL; }