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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 563D8C476E5 for ; Thu, 12 Jul 2018 17:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3CF220852 for ; Thu, 12 Jul 2018 17:03:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F3CF220852 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732392AbeGLRN1 (ORCPT ); Thu, 12 Jul 2018 13:13:27 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:34826 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726912AbeGLRN0 (ORCPT ); Thu, 12 Jul 2018 13:13:26 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A06B34074452; Thu, 12 Jul 2018 17:03:02 +0000 (UTC) Received: from whitewolf.lyude.net.com (ovpn-120-214.rdu2.redhat.com [10.10.120.214]) by smtp.corp.redhat.com (Postfix) with ESMTP id 42E3510FFE4D; Thu, 12 Jul 2018 17:03:02 +0000 (UTC) From: Lyude Paul To: nouveau@lists.freedesktop.org Cc: Karol Herbst , Ben Skeggs , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] drm/nouveau: Fix runtime PM leak in drm_open() Date: Thu, 12 Jul 2018 13:02:52 -0400 Message-Id: <20180712170256.13018-2-lyude@redhat.com> In-Reply-To: <20180712170256.13018-1-lyude@redhat.com> References: <20180712170256.13018-1-lyude@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Thu, 12 Jul 2018 17:03:02 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Thu, 12 Jul 2018 17:03:02 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'lyude@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Noticed this as I was skimming through, if we fail to allocate memory for cli we'll end up returning without dropping the runtime PM ref we got. Additionally, we'll even return the wrong return code! (ret most likely will == 0 here, we want -ENOMEM). Signed-off-by: Lyude Paul Reviewed-by: Lukas Wunner --- drivers/gpu/drm/nouveau/nouveau_drm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 0452b18d36b9..0f668e275ee1 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -919,8 +919,10 @@ nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv) get_task_comm(tmpname, current); snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid)); - if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL))) - return ret; + if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL))) { + ret = -ENOMEM; + goto done; + } ret = nouveau_cli_init(drm, name, cli); if (ret) -- 2.17.1