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 45443C433FE for ; Mon, 28 Nov 2022 17:53:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233691AbiK1Rxr (ORCPT ); Mon, 28 Nov 2022 12:53:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233995AbiK1RvZ (ORCPT ); Mon, 28 Nov 2022 12:51:25 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B5582EF11; Mon, 28 Nov 2022 09:43:36 -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 ams.source.kernel.org (Postfix) with ESMTPS id AEC6EB80E9C; Mon, 28 Nov 2022 17:43:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7C5B6C43141; Mon, 28 Nov 2022 17:43:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669657414; bh=mYDS8NhRtn6iHirANvokxO19PldCMN2N89AlLM3kj5s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C/2HPI6udJk+NmsRVsQLYP6owdJQ9/ItPQy6+KzwrtgtSdHqcngBzr0zkSTmgUmk5 DBikLAcJq3kWNn2jerVywa+vBkwqPGiUxtUTnBoA5iNklnrd0veEa36q2wSwP+cDst mKFXhWySDeU9ekx27CgKZvrrJEtgkEhwOMl62JjrFHFz3HwpVvaA8YGB/lk2rCd0nX g2gV9KDrk2Z8z3aZS260aoDpLUsLn8EXWq2lsJ2glDNTVIc0peSzilkOsCzIACBKb3 2KgTNGvF25ZU4lR6cDz2UwlbjK9zzIRUZIFFnTQdOSDhWyeKifnHRYuNeHDl3jjE+Z subU+myQCxb/w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Srinivasa Rao Mandadapu , Mark Brown , Sasha Levin , lgirdwood@gmail.com, perex@perex.cz, tiwai@suse.com, alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 4.9 5/5] ASoC: soc-pcm: Add NULL check in BE reparenting Date: Mon, 28 Nov 2022 12:43:23 -0500 Message-Id: <20221128174324.1443132-5-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221128174324.1443132-1-sashal@kernel.org> References: <20221128174324.1443132-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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