From patchwork Wed Oct 12 06:17:30 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 9372123 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 47CB4607FD for ; Wed, 12 Oct 2016 06:17:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B08B29302 for ; Wed, 12 Oct 2016 06:17:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1DD3129B5F; Wed, 12 Oct 2016 06:17:56 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id AAE1229302 for ; Wed, 12 Oct 2016 06:17:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 74D436E7BF; Wed, 12 Oct 2016 06:17:53 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from aserp1040.oracle.com (aserp1040.oracle.com [141.146.126.69]) by gabe.freedesktop.org (Postfix) with ESMTPS id 567F46E7BF for ; Wed, 12 Oct 2016 06:17:52 +0000 (UTC) Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u9C6HkPI004797 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 12 Oct 2016 06:17:47 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u9C6HkAR016447 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 12 Oct 2016 06:17:46 GMT Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by userv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u9C6HgZO010778; Wed, 12 Oct 2016 06:17:44 GMT Received: from mwanda (/154.122.16.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 11 Oct 2016 23:17:41 -0700 Date: Wed, 12 Oct 2016 09:17:30 +0300 From: Dan Carpenter To: Alex Deucher , Tom St Denis Subject: [patch] drm/amdgpu: potential NULL dereference in debugfs code Message-ID: <20161012061730.GP12841@mwanda> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.6.0 (2016-04-01) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Cc: Jammy Zhou , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Junwei Zhang , Christian =?iso-8859-1?Q?K=F6nig?= , Monk Liu X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP debugfs_create_file() returns NULL on error, it only returns error pointers if debugfs isn't enabled in the config and we checked for that earlier so it can't happen. Fixes: 4f4824b55650 ('drm/amd/amdgpu: Convert ring debugfs entries to binary') Signed-off-by: Dan Carpenter Reviewed-by: Christian König . diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 85aeb0a..8d16eaf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -371,8 +371,8 @@ static int amdgpu_debugfs_ring_init(struct amdgpu_device *adev, ent = debugfs_create_file(name, S_IFREG | S_IRUGO, root, ring, &amdgpu_debugfs_ring_fops); - if (IS_ERR(ent)) - return PTR_ERR(ent); + if (!ent) + return -ENOMEM; i_size_write(ent->d_inode, ring->ring_size + 12); ring->ent = ent;