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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC7FFC4167B for ; Mon, 12 Dec 2022 13:55:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233266AbiLLNz0 (ORCPT ); Mon, 12 Dec 2022 08:55:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233175AbiLLNzF (ORCPT ); Mon, 12 Dec 2022 08:55:05 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E87A055BE for ; Mon, 12 Dec 2022 05:54:56 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8015261074 for ; Mon, 12 Dec 2022 13:54:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87454C433EF; Mon, 12 Dec 2022 13:54:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670853295; bh=mYDS8NhRtn6iHirANvokxO19PldCMN2N89AlLM3kj5s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gwuaTj6qv5yTBN+wO35Ae29G/qJUF5zSrLHRLR94VziC+iQBl/53MsibaSq2pl+bf H2v0+eOaWzE4WEJykdtE5HFChgJjNbd+BYeJse45CtwJfMcn2A4yfop9uSKDJNNvwY oiYRKf4geyXXYmgTktX0WPIhfAkETf1T8KXJNF9E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Srinivasa Rao Mandadapu , Mark Brown , Sasha Levin Subject: [PATCH 4.9 05/31] ASoC: soc-pcm: Add NULL check in BE reparenting Date: Mon, 12 Dec 2022 14:19:23 +0100 Message-Id: <20221212130910.228103113@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130909.943483205@linuxfoundation.org> References: <20221212130909.943483205@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Srinivasa Rao Mandadapu [ Upstream commit db8f91d424fe0ea6db337aca8bc05908bbce1498 ] Add NULL check in dpcm_be_reparent API, to handle kernel NULL pointer dereference error. The issue occurred in fuzzing test. Signed-off-by: Srinivasa Rao Mandadapu Link: https://lore.kernel.org/r/1669098673-29703-1-git-send-email-quic_srivasam@quicinc.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/soc-pcm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 6c31a909845c..f6cebe2b3cbb 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1182,6 +1182,8 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, return; be_substream = snd_soc_dpcm_get_substream(be, stream); + if (!be_substream) + return; list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { if (dpcm->fe == fe) -- 2.35.1