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=-12.8 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,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 C174CC433E1 for ; Mon, 17 Aug 2020 17:48:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 95C7B207FB for ; Mon, 17 Aug 2020 17:48:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597686533; bh=G2XizUJHfMayOcIy1/wif6i1wmQgrdBDThFngyfozWQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cdEGQ76CYNXi73ozUG7UG5n+6Kc0T8NUWLnbaHky3SrJIPnlfG2EZH6BNd0wwjhIj Pv0AfmfzqcqEQR2Fx+km9z8ddSOB+jMblM9HogO4fFISp/n62hgMwgG60Yg7yeJ5VY SFeHkxFdrLEt5muCUe2yfRSCmyn2P42THZEVT1cU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390111AbgHQRsw (ORCPT ); Mon, 17 Aug 2020 13:48:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:46226 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388741AbgHQQNE (ORCPT ); Mon, 17 Aug 2020 12:13:04 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 982B0207FB; Mon, 17 Aug 2020 16:13:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597680784; bh=G2XizUJHfMayOcIy1/wif6i1wmQgrdBDThFngyfozWQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K0cuWiDim71stRrjmp5sWJaxND87Jg7rxBh4Gf4bEUn8F5gacDbOg+7LcCTIfBxwY Ws1ZOE8w93rhqQItfcqcalAfvTLSBQWRGFWaDUvDMOEAWLv2v+XDkgwuyGnLzFsQYA 6sDF3XxMXEA/w5uqU2YIkee9WXV4qVA5Bgbtxyzo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qiushi Wu , Chris Wilson , Sasha Levin Subject: [PATCH 4.19 055/168] agp/intel: Fix a memory leak on module initialisation failure Date: Mon, 17 Aug 2020 17:16:26 +0200 Message-Id: <20200817143736.500580132@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143733.692105228@linuxfoundation.org> References: <20200817143733.692105228@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Qiushi Wu [ Upstream commit b975abbd382fe442713a4c233549abb90e57c22b ] In intel_gtt_setup_scratch_page(), pointer "page" is not released if pci_dma_mapping_error() return an error, leading to a memory leak on module initialisation failure. Simply fix this issue by freeing "page" before return. Fixes: 0e87d2b06cb46 ("intel-gtt: initialize our own scratch page") Signed-off-by: Qiushi Wu Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: https://patchwork.freedesktop.org/patch/msgid/20200522083451.7448-1-chris@chris-wilson.co.uk Signed-off-by: Sasha Levin --- drivers/char/agp/intel-gtt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index b161bdf600004..0941d38b2d32f 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -304,8 +304,10 @@ static int intel_gtt_setup_scratch_page(void) if (intel_private.needs_dmar) { dma_addr = pci_map_page(intel_private.pcidev, page, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); - if (pci_dma_mapping_error(intel_private.pcidev, dma_addr)) + if (pci_dma_mapping_error(intel_private.pcidev, dma_addr)) { + __free_page(page); return -EINVAL; + } intel_private.scratch_page_dma = dma_addr; } else -- 2.25.1