From patchwork Tue Sep 1 15:08:30 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: 310302 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 2039DC2D0A5 for ; Tue, 1 Sep 2020 16:37:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC8452087D for ; Tue, 1 Sep 2020 16:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598978273; bh=/CZDFpBvnoCX2yOgUnu0Ob00wmasP8DFeZVNTyYNKBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EXnxeKVKj6Bffeir+pS86Y4mwoLiRohBUCEIt0biTLMqnhaWGtOgGYMdU3aMrmq+A v4CNFRjpZLCL2+7h6v590cRX+/aexI7u3qK2hYPAxgfRpZK+1nYoImHpc45A3sOlID NLcmmBN9lndb2ohjNoUVSu8TeiW2nXubNCyE+K+4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730499AbgIAP3D (ORCPT ); Tue, 1 Sep 2020 11:29:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:58052 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730494AbgIAP3C (ORCPT ); Tue, 1 Sep 2020 11:29:02 -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 5FD4F20684; Tue, 1 Sep 2020 15:29:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974141; bh=/CZDFpBvnoCX2yOgUnu0Ob00wmasP8DFeZVNTyYNKBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EfmLOLO0xNLZVxKaExxNr+b+zdvYq8owm8Tzf2dU8ChV2usNZXtQ4i40HE+u5wm3a 8texMZHQ1FCDiictBMHC58zgAUrjGD+Aw0fRA+qn/iRGL1Rgoj6sTlrCmM9INv6jXU NCcVRc4kmR5Uwl4xMTyFA9v05sk4uEWSMuNJMD2E= 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 5.4 030/214] drm/amdgpu: fix ref count leak in amdgpu_driver_open_kms Date: Tue, 1 Sep 2020 17:08:30 +0200 Message-Id: <20200901150954.406486096@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150952.963606936@linuxfoundation.org> References: <20200901150952.963606936@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 2a7da26008a27..fcc5905a7535d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -976,7 +976,7 @@ 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)) { @@ -1027,6 +1027,7 @@ error_pasid: out_suspend: pm_runtime_mark_last_busy(dev->dev); +pm_put: pm_runtime_put_autosuspend(dev->dev); return r;