From patchwork Tue Sep 1 15:08:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 264733 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=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 AC309C433E6 for ; Tue, 1 Sep 2020 15:38:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D680205F4 for ; Tue, 1 Sep 2020 15:38:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974699; bh=uQrE+MlhzItmOhpMJ6I/GttJEkgsDMhrOz1QABjShHw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iBEPC6h7RjYaf3oLcrUhaottK35SyqaqrMZRkgLDuKDNhu40cPImAEyzypVB205MZ vwmt2W2IqFTdVLwTnNR35TSFh8gWSsgWDpKxoyONdA/3JdXSjR6CU6OSxginqhO2/H q/6wahiJIzrZCwH0E8bEc4solyOhxb1XdRP7fN0c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731237AbgIAPiS (ORCPT ); Tue, 1 Sep 2020 11:38:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:46998 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731393AbgIAPiL (ORCPT ); Tue, 1 Sep 2020 11:38:11 -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 D67C620866; Tue, 1 Sep 2020 15:38:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974691; bh=uQrE+MlhzItmOhpMJ6I/GttJEkgsDMhrOz1QABjShHw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gWYZnH2sAA+fDR3JKPqylqm/fKnvCkHHW43rLtcxf3DMjnOwmLi/XzUFvjHnScj0M cqKeE8PpDntDy8ZBdaOHzZTUlEtkOvg4Wg2pkqJr1x52e+dWarKD6o+/mA0rUTRMeT EddOrhT68h/iISgwrHOwtZ34wIoqcaaiVRQCGfRw= 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 5.8 050/255] drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open Date: Tue, 1 Sep 2020 17:08:26 +0200 Message-Id: <20200901151003.130233222@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 d5c23d1c20d88..44e515bbbb444 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -189,8 +189,10 @@ 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; }