From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 52D93C433E3 for ; Fri, 21 Aug 2020 17:10:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24BDF20748 for ; Fri, 21 Aug 2020 17:10:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598029833; bh=QVygOxjF5CurxzjPkJ/kTBJPINoegtQdrxSKD/OSCcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=e+qIqcGqR4HkC7VrSBrbkSBDuKtKfjcquEt5AVl5ULaBJOJDGJObbX84AjJomAxPG XTrP+R821JQ6VLg1IlT42WYk4y6C1Rxucw2HkGzZol1cBF3oJxjBgit0KCU9Hyp7oQ A0xfhcvtOeo4a0pFPkjF+KbdqBrhBnzdeKFh4E/E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728955AbgHURKc (ORCPT ); Fri, 21 Aug 2020 13:10:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:49910 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728182AbgHUQRh (ORCPT ); Fri, 21 Aug 2020 12:17:37 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 759CC22CB1; Fri, 21 Aug 2020 16:17:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598026648; bh=QVygOxjF5CurxzjPkJ/kTBJPINoegtQdrxSKD/OSCcw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=om9i0C8LcM22d11scms8vmTsg5udEpmsjcqw5H6h9LYF0glXtRd8CNo/BIrcGqEay 5RvOwyFZENXs7qllKm8hpyRL7Oi/xZAjuMt3KEzErLG4K21pZV1UFwtNvAarOQdlp4 zYVMb0AoiFYGrZYzY2OsQf8IUzJkbEfNKdKu6SFs= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Navid Emamdoost , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 19/48] drm/amd/display: fix ref count leak in amdgpu_drm_ioctl Date: Fri, 21 Aug 2020 12:16:35 -0400 Message-Id: <20200821161704.348164-19-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200821161704.348164-1-sashal@kernel.org> References: <20200821161704.348164-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 05d114a72ca1e..fa2c0f29ad4de 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1286,11 +1286,12 @@ 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; } -- 2.25.1