From patchwork Tue Sep 1 15:09:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 264418 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 1A3AFC433E2 for ; Tue, 1 Sep 2020 17:25:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0670208CA for ; Tue, 1 Sep 2020 17:25:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598981126; bh=mR6oGR+NyHCaBD7rYApwSslo3Nk/GcTOScozNAXPbPE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=p60Z7/cWxdpW9mXOCDccUm39kccnvKVx4WHMpQwMKLHgRuUjatBH0OcOLI/IVeWAx zM9xTbPvfyzSQXMc+p2Pm3ltrOZiYvPanTJtXCBMjMlBKpU1DzuwWREC7vhhz/NtP/ WSog+3gCaaysL4yyFYFUXe7Wagl2KgpP4HcGIYYc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728583AbgIARX4 (ORCPT ); Tue, 1 Sep 2020 13:23:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:54050 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727058AbgIAPL6 (ORCPT ); Tue, 1 Sep 2020 11:11:58 -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 5B2B12078B; Tue, 1 Sep 2020 15:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973117; bh=mR6oGR+NyHCaBD7rYApwSslo3Nk/GcTOScozNAXPbPE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YF1+/XKVysIXcGYHbn0FPyKKVI7cZQIKH4kPIVituN/cebfdEUQh4uLNnnhSU7so3 kmIxVDD8a+l775QVJFbE+xEExuznwuQwrHSY1Ee4CD+4gjjEIyVs0b70y+WddsgWQH sNMO3WYnJ7ns+ZUFP9ysNino+vWAeyLHCbHHugD4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Navid Emamdoost , Alex Deucher , Sasha Levin Subject: [PATCH 4.4 14/62] drm/amd/display: fix ref count leak in amdgpu_drm_ioctl Date: Tue, 1 Sep 2020 17:09:57 +0200 Message-Id: <20200901150921.414625994@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150920.697676718@linuxfoundation.org> References: <20200901150920.697676718@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: Navid Emamdoost [ Upstream commit 5509ac65f2fe5aa3c0003237ec629ca55024307c ] in amdgpu_drm_ioctl the call to pm_runtime_get_sync increments the counter even in case of failure, leading to incorrect ref count. In case of failure, decrement the ref count before returning. Signed-off-by: Navid Emamdoost Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 8d6668cedf6db..eb3c54e1f1ca8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -443,11 +443,12 @@ long amdgpu_drm_ioctl(struct file *filp, dev = file_priv->minor->dev; ret = pm_runtime_get_sync(dev->dev); if (ret < 0) - return ret; + goto out; ret = drm_ioctl(filp, cmd, arg); pm_runtime_mark_last_busy(dev->dev); +out: pm_runtime_put_autosuspend(dev->dev); return ret; }