From patchwork Wed Jun 14 10:58:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 9786111 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 968B0602C9 for ; Wed, 14 Jun 2017 10:59:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A7F062855C for ; Wed, 14 Jun 2017 10:59:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9B5C4285DD; Wed, 14 Jun 2017 10:59:15 +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 3F4462855C for ; Wed, 14 Jun 2017 10:59:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 329266E514; Wed, 14 Jun 2017 10:59:13 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from userp1040.oracle.com (userp1040.oracle.com [156.151.31.81]) by gabe.freedesktop.org (Postfix) with ESMTPS id B36E06E513; Wed, 14 Jun 2017 10:59:11 +0000 (UTC) Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v5EAx3jP028695 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 14 Jun 2017 10:59:04 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserv0021.oracle.com (8.13.8/8.14.4) with ESMTP id v5EAx3n7013696 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 14 Jun 2017 10:59:03 GMT Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id v5EAx0f9012969; Wed, 14 Jun 2017 10:59:00 GMT Received: from elgon.mountain (/129.205.6.86) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 14 Jun 2017 03:59:00 -0700 Date: Wed, 14 Jun 2017 13:58:53 +0300 From: Dan Carpenter To: Oded Gabbay , Alexey Skidanov Subject: [PATCH] drm/amdkfd: NULL dereference involving create_process() Message-ID: <20170614105853.GP29394@elgon.mountain> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Cc: kernel-janitors@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Alex Deucher , Christian =?iso-8859-1?Q?K=F6nig?= 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 We accidentally return ERR_PTR(0) which is NULL. The caller is not expecting that and it leads to an Oops. Fixes: dd59239a9862 ("amdkfd: init aperture once per process") Signed-off-by: Dan Carpenter diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 84d1ffd1eef9..1190d06884ed 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -318,7 +318,8 @@ static struct kfd_process *create_process(const struct task_struct *thread) /* init process apertures*/ process->is_32bit_user_mode = in_compat_syscall(); - if (kfd_init_apertures(process) != 0) + err = kfd_init_apertures(process); + if (err != 0) goto err_init_apretures; return process;