From patchwork Tue Sep 1 15:09:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 264504 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 D9DF8C433E7 for ; Tue, 1 Sep 2020 16:57:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A73EE20767 for ; Tue, 1 Sep 2020 16:57:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598979479; bh=CdsX10OOX4aiQ4PMa0R+6rZknsSIDJsbXagb4me3NZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KwU/S/XxNjY5BQIFSxJBCYRK8OnqPu4XxYZs+CHQV/UODYL6wdy9ZpTYV6tprgbFY MJ1XJ+J1pO3+cpOn37S6y93r077Wk+B+WX23DJcybD6fKuWk5beiRR+vdL+Db8nbMs iAbOrn2j8HHpaQrC2SXbVXTfc1fGm2sQ9ZMBVGos= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730693AbgIAQ55 (ORCPT ); Tue, 1 Sep 2020 12:57:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:44798 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729378AbgIAPWp (ORCPT ); Tue, 1 Sep 2020 11:22:45 -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 A8171206FA; Tue, 1 Sep 2020 15:22:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973765; bh=CdsX10OOX4aiQ4PMa0R+6rZknsSIDJsbXagb4me3NZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KysTG/2L+HE8fMe3QaPVx3StYy9vLSawos81erT6wfbWycMZU4r8G2Yw4Tz/wcqTh rAdZIW7uT73Ijbfd0xEkkWWipjH0Q1iGJnuYI6gq68SOOMt67zsZrioFRujXWJqxcA MoejoklV/ZKjLYZFjzcH5c+2DIBvhFQf0m1DrFYo= 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 4.19 038/125] drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open Date: Tue, 1 Sep 2020 17:09:53 +0200 Message-Id: <20200901150936.430244325@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150934.576210879@linuxfoundation.org> References: <20200901150934.576210879@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 406cb99af7f21..d4fe52ec4c966 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; }