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=-9.8 required=3.0 tests=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 85A3CC3A5A3 for ; Tue, 27 Aug 2019 08:12:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 593602173E for ; Tue, 27 Aug 2019 08:12:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566893527; bh=OkhriDzPXJ2ft+U5w8rso8ZEaQTThAc6E1KDJGi771c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DKLkgCHBYzRRhRmDPuP+q9D6k9FX/YSy0d0p1/NRj4RlvFYqhBbwqKCRddj6mywyu YgP3+0iN8i1ZMjnzFaOnMXBPXWDJ3nFB2jefzmufnH2g+3nr8PMmB37b7/mzM6zjlK V+uK1gTmtEhesfPGeCabEcWlcbNoMK/ADvs0nk7Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731300AbfH0H7v (ORCPT ); Tue, 27 Aug 2019 03:59:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:53624 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731291AbfH0H7r (ORCPT ); Tue, 27 Aug 2019 03:59:47 -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 B81D52186A; Tue, 27 Aug 2019 07:59:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566892786; bh=OkhriDzPXJ2ft+U5w8rso8ZEaQTThAc6E1KDJGi771c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vo7aFEJ3Q75DhwL6EiDb1kyPX5Ubny+pHuRyinfZm6gu15jTc7+nP1uIu7RZNkT00 pkqovgymDE6fFaO0xssvlYzLk+ZOCuzGdjpKd3B5Ufaw9WH5THUN6R9qHFelCQdcj7 NzvEfblyMCJHrzgxzcxb2SmStKyklFIbfWJ532Zc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wen Yang , Kuninori Morimoto , Mark Brown , Sasha Levin Subject: [PATCH 5.2 004/162] ASoC: audio-graph-card: fix use-after-free in graph_dai_link_of_dpcm() Date: Tue, 27 Aug 2019 09:48:52 +0200 Message-Id: <20190827072738.306153730@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190827072738.093683223@linuxfoundation.org> References: <20190827072738.093683223@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 [ Upstream commit aa2e362cb6b3f5ca88093ada01e1a0ace8a517b2 ] After calling of_node_put() on the ports, port, and node variables, they are still being used, which may result in use-after-free. Fix this issue by calling of_node_put() after the last usage. Fixes: dd98fbc558a0 ("ASoC: audio-graph-card: cleanup DAI link loop method - step1") Link: https://lore.kernel.org/r/1562743509-30496-4-git-send-email-wen.yang99@zte.com.cn Signed-off-by: Wen Yang Acked-by: Kuninori Morimoto Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/generic/audio-graph-card.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c index 70ed28d97d497..d5188a179378f 100644 --- a/sound/soc/generic/audio-graph-card.c +++ b/sound/soc/generic/audio-graph-card.c @@ -222,10 +222,6 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, dev_dbg(dev, "link_of DPCM (%pOF)\n", ep); - of_node_put(ports); - of_node_put(port); - of_node_put(node); - if (li->cpu) { int is_single_links = 0; @@ -243,17 +239,17 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links); if (ret) - return ret; + goto out_put_node; ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai); if (ret < 0) - return ret; + goto out_put_node; ret = asoc_simple_set_dailink_name(dev, dai_link, "fe.%s", dai_link->cpu_dai_name); if (ret < 0) - return ret; + goto out_put_node; /* card->num_links includes Codec */ asoc_simple_canonicalize_cpu(dai_link, is_single_links); @@ -277,17 +273,17 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, ret = asoc_simple_parse_codec(ep, dai_link); if (ret < 0) - return ret; + goto out_put_node; ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai); if (ret < 0) - return ret; + goto out_put_node; ret = asoc_simple_set_dailink_name(dev, dai_link, "be.%s", codecs->dai_name); if (ret < 0) - return ret; + goto out_put_node; /* check "prefix" from top node */ snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node, @@ -307,19 +303,23 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, ret = asoc_simple_parse_tdm(ep, dai); if (ret) - return ret; + goto out_put_node; ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep, NULL, &dai_link->dai_fmt); if (ret < 0) - return ret; + goto out_put_node; dai_link->dpcm_playback = 1; dai_link->dpcm_capture = 1; dai_link->ops = &graph_ops; dai_link->init = asoc_simple_dai_init; - return 0; +out_put_node: + of_node_put(ports); + of_node_put(port); + of_node_put(node); + return ret; } static int graph_dai_link_of(struct asoc_simple_priv *priv, -- 2.20.1