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 X-Spam-Level: X-Spam-Status: No, score=-8.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1C7BC3A5A1 for ; Wed, 21 Aug 2019 07:07:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B77BA22CF7 for ; Wed, 21 Aug 2019 07:07:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="C3xv6rQI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728190AbfHUHHS (ORCPT ); Wed, 21 Aug 2019 03:07:18 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:35042 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727206AbfHUHHS (ORCPT ); Wed, 21 Aug 2019 03:07:18 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7L74Ful078588; Wed, 21 Aug 2019 07:07:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type : in-reply-to; s=corp-2019-08-05; bh=cE9s0Cp1ViW4krpgGQjjfgAOVUXuBLNUghjKIjDQfmY=; b=C3xv6rQIuzVnjMkkBCEdmoeUR3Yl2ix2bcPFGozJURC5uoX8SeduUvSr8UQQgaHuzbEK NjXZ4G8mu9m/BQr0E6l4j27bPK0Yse1fc6qs0qV0C1UffivLx5T+a2yMSROj2caDa6oA KhmYTfVGldZPq8Jgulk+CPx/2b6CL2AZ9TuHOWVFlfoJ9FFXF3FKJRsO/bwi5nteCxJM frW4eQP3bmg+Uhn5/ik5fOO9h6ZuuGtbC+mYmtcELedYK7wzlnv67DXxD92eidxLZ8gM Q0L8zN77Sa1cxCbeSG+ttu+5k//M3ezUH3cnZBjn9Bc5FIX0RVaZ75oE5ej2D6n2GISE mQ== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by aserp2120.oracle.com with ESMTP id 2ue9hpka6r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Aug 2019 07:07:11 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7L74EkP174834; Wed, 21 Aug 2019 07:07:11 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3030.oracle.com with ESMTP id 2ug1ga8jgu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Aug 2019 07:07:11 +0000 Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x7L77AjQ023628; Wed, 21 Aug 2019 07:07:10 GMT Received: from mwanda (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 21 Aug 2019 00:07:09 -0700 Date: Wed, 21 Aug 2019 10:07:02 +0300 From: Dan Carpenter To: Derek Kiernan , Dragan Cvetic Cc: Arnd Bergmann , Greg Kroah-Hartman , Michal Simek , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH 2/4] misc: xilinx_sdfec: Return -EFAULT if copy_from_user() fails Message-ID: <20190821070702.GB26957@mwanda> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190821070606.GA26957@mwanda> X-Mailer: git-send-email haha only kidding User-Agent: Mutt/1.10.1 (2018-07-13) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9355 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908210076 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9355 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908210076 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The copy_from_user() funciton returns the number of bytes remaining to be copied but we want to return -EFAULT to the user. Fixes: 20ec628e8007 ("misc: xilinx_sdfec: Add ability to configure LDPC") Signed-off-by: Dan Carpenter --- drivers/misc/xilinx_sdfec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c index dc1b8b412712..813b82c59360 100644 --- a/drivers/misc/xilinx_sdfec.c +++ b/drivers/misc/xilinx_sdfec.c @@ -651,9 +651,10 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg) if (!ldpc) return -ENOMEM; - ret = copy_from_user(ldpc, arg, sizeof(*ldpc)); - if (ret) + if (copy_from_user(ldpc, arg, sizeof(*ldpc))) { + ret = -EFAULT; goto err_out; + } if (xsdfec->config.code == XSDFEC_TURBO_CODE) { ret = -EIO; -- 2.20.1