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 7AB3FC4332F for ; Mon, 28 Nov 2022 17:49:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233828AbiK1Rtf (ORCPT ); Mon, 28 Nov 2022 12:49:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233868AbiK1Rr0 (ORCPT ); Mon, 28 Nov 2022 12:47:26 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BD8C427900; Mon, 28 Nov 2022 09:42:27 -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 4E790612C4; Mon, 28 Nov 2022 17:42:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BB8A0C433D6; Mon, 28 Nov 2022 17:42:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669657346; bh=kodpPhPiGEHVncs7lHlgeyBV0cizVTBtEmqJi9UoSh8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TNt4nvx2GI4uw/M7r4ahCIA/eEz8RmlBGLKPk24XJDs28rG4qrg3xVNPGbVCloI/3 3vM14af2VjIAVhgba1HZY9clnEiWELPQ57WeJsLBy8Lq0uvP8VBoUpN50tctENKm34 NdKWfO4ixSlLdBlmz5vHE0/Pj+Dd44lYlqkcCyHnPacQ66V1VPGp+pzkKcqM65p6Q6 8Sa23uYMkRWDf+vOy+nJO+Cv5C2YUX+rUTt59xuBSXioF3t6PdoGNOGwpkZ/d6iwV/ pYRm7R60n0yapPIgfREa/bd6mvL+SKEbdSzKs+ug+04/YL1DGT3WpnJUCQElFKb/ps VRFv/Z46/Jlwg== 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 5.4 12/16] ASoC: soc-pcm: Add NULL check in BE reparenting Date: Mon, 28 Nov 2022 12:41:55 -0500 Message-Id: <20221128174201.1442499-12-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221128174201.1442499-1-sashal@kernel.org> References: <20221128174201.1442499-1-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 1196167364d4..2f1ab70a68fc 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1201,6 +1201,8 @@ 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; for_each_dpcm_fe(be, stream, dpcm) { if (dpcm->fe == fe) -- 2.35.1