From patchwork Tue Sep 1 15:08:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 264627 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 26814C433E6 for ; Tue, 1 Sep 2020 16:11:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E29CB204EC for ; Tue, 1 Sep 2020 16:11:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976664; bh=OdkqtBV3OgW7BJbj4JUVEARVm6DHMpSCUn3XLTLT04g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DmAHne9ktglLmaRtdLXJYEatPrDfzWKGCjO1A5fHvs+7BUySfq0u7NB4MQGECTUbO DEogeWFfELN7AH53jachrkqt5QXO0r5GLGbNsN7l2yLUbBqO+h7pfb3TR+vKZJvVWO 8zmQmhlLoDBlT7w00J5NFaQnKPhXoSR8MvOIDteI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731391AbgIAQKv (ORCPT ); Tue, 1 Sep 2020 12:10:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:46778 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731224AbgIAPiG (ORCPT ); Tue, 1 Sep 2020 11:38:06 -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 6764D205F4; Tue, 1 Sep 2020 15:38:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974686; bh=OdkqtBV3OgW7BJbj4JUVEARVm6DHMpSCUn3XLTLT04g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=juCEPI9UfOqKXg+M4CRKPP0LX6fQSfSekN7lLIygJz215qKeA5WInkm31N8hmvuVn NWglPylpDZJKytk6IjDReqqIKX6V2HrCeWPfAJTa0lcZnF80zHjZfh4nd7A1ox6VXC JINM+W3/dHda4M4+UnPnWvwf/H9+flzSjquCh0A4= 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 5.8 025/255] drm/amdgpu: fix ref count leak in amdgpu_driver_open_kms Date: Tue, 1 Sep 2020 17:08:01 +0200 Message-Id: <20200901151001.977920685@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: Navid Emamdoost [ Upstream commit 9ba8923cbbe11564dd1bf9f3602add9a9cfbb5c6 ] in amdgpu_driver_open_kms 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_kms.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index 21292098bc023..0c49ab17be303 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -992,7 +992,7 @@ int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv) r = pm_runtime_get_sync(dev->dev); if (r < 0) - return r; + goto pm_put; fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL); if (unlikely(!fpriv)) { @@ -1043,6 +1043,7 @@ error_pasid: out_suspend: pm_runtime_mark_last_busy(dev->dev); +pm_put: pm_runtime_put_autosuspend(dev->dev); return r;