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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 4C379C433E6 for ; Tue, 1 Sep 2020 15:21:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D7F12078B for ; Tue, 1 Sep 2020 15:21:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973669; bh=lCoJotzf1Gl92+R5EX6TjqbudBJhFFcPs0ZmkIymhXo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JfP/infAtJ4jXhhcnOkBoomo5ddIsxGxHr3pWK0hLhNRtCXPYYaFd27lRmf2ah9iy 3OTpsAAy3ff2LPX58C9g2YWr271tHyaAC9JwiIHvrjIjpSkZimVm302QbowrGEt9B8 0RosIJHyytzmTal+Ma6S8C740YXbIiGuei+cdP84= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729663AbgIAPVH (ORCPT ); Tue, 1 Sep 2020 11:21:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:37494 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729516AbgIAPSx (ORCPT ); Tue, 1 Sep 2020 11:18:53 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C6D57206FA; Tue, 1 Sep 2020 15:18:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973532; bh=lCoJotzf1Gl92+R5EX6TjqbudBJhFFcPs0ZmkIymhXo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FwkvQqCyOn+tz/0qDS66xqdUlCTF8qTkzDGzPdqFzkrV+RZ8plIdiq3kBH4X0c1Xf uSx9GT6pAHKivUz9JbOskJFSs5u7aaSRXPZdLlZKL9CczXisO2+qceiztvT7OXCrD/ MHi8gELpOHFy5U7jKLwtFSo1H0mB2oBqqXbHfBEs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Aditya Pakki , Ben Skeggs , Sasha Levin Subject: [PATCH 4.14 29/91] drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open Date: Tue, 1 Sep 2020 17:10:03 +0200 Message-Id: <20200901150929.605842245@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150928.096174795@linuxfoundation.org> References: <20200901150928.096174795@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Aditya Pakki [ Upstream commit bfad51c7633325b5d4b32444efe04329d53297b2 ] nouveau_fbcon_open() calls calls pm_runtime_get_sync() that increments the reference count. In case of failure, decrement the ref count before returning the error. Signed-off-by: Aditya Pakki Signed-off-by: Ben Skeggs Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nouveau_fbcon.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 9ffb09679cc4a..cae1beabcd05d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -184,8 +184,10 @@ nouveau_fbcon_open(struct fb_info *info, int user) struct nouveau_fbdev *fbcon = info->par; struct nouveau_drm *drm = nouveau_drm(fbcon->helper.dev); int ret = pm_runtime_get_sync(drm->dev->dev); - if (ret < 0 && ret != -EACCES) + if (ret < 0 && ret != -EACCES) { + pm_runtime_put(drm->dev->dev); return ret; + } return 0; } -- 2.25.1