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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 25000C43217 for ; Mon, 20 Sep 2021 18:44:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11B4161262 for ; Mon, 20 Sep 2021 18:44:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1383620AbhITSor (ORCPT ); Mon, 20 Sep 2021 14:44:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:56452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1382337AbhITSkT (ORCPT ); Mon, 20 Sep 2021 14:40:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D5C3E63333; Mon, 20 Sep 2021 17:31:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632159068; bh=/YhzPuWJIkCArIATZHznT6wa6phJu78QNPO4qrXyVw4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dw4qCLxMDoA5j1E/esqTUSbo0pyMfrjDDugHzhpAMOlbgzL5yyHOzQXb3HPQL0F/y pRdgLp+fJbNgfMGRVyIvqbyjgQormgc03Ao0LI0j2T1IP2HmoXrbmeEjoTmzsB9Xwf m0NgyLowMKpRoGZ76+GPkpHyX0bmMtELxKjW1R8Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Walle , Lucas Stach , Marek Vasut , Christian Gmeiner Subject: [PATCH 5.14 029/168] drm/etnaviv: fix MMU context leak on GPU reset Date: Mon, 20 Sep 2021 18:42:47 +0200 Message-Id: <20210920163922.605288738@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163921.633181900@linuxfoundation.org> References: <20210920163921.633181900@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lucas Stach commit f978a5302f5566480c58ffae64a16d34456801bd upstream. After a reset the GPU is no longer using the MMU context and may be restarted with a different context. While the mmu_state proeprly was cleared, the context wasn't unreferenced, leading to a memory leak. Cc: stable@vger.kernel.org # 5.4 Reported-by: Michael Walle Signed-off-by: Lucas Stach Tested-by: Michael Walle Tested-by: Marek Vasut Reviewed-by: Christian Gmeiner Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -571,6 +571,8 @@ static int etnaviv_hw_reset(struct etnav gpu->fe_running = false; gpu->exec_state = -1; + if (gpu->mmu_context) + etnaviv_iommu_context_put(gpu->mmu_context); gpu->mmu_context = NULL; return 0;