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=-10.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 F0C0CC433F5 for ; Thu, 23 Sep 2021 12:58:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BED4460F43 for ; Thu, 23 Sep 2021 12:58:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241162AbhIWNAM (ORCPT ); Thu, 23 Sep 2021 09:00:12 -0400 Received: from mga05.intel.com ([192.55.52.43]:17297 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241098AbhIWNAL (ORCPT ); Thu, 23 Sep 2021 09:00:11 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10115"; a="309392101" X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="309392101" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 05:58:39 -0700 X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="558348226" Received: from upatel2-mobl.amr.corp.intel.com (HELO [10.251.134.231]) ([10.251.134.231]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 05:58:39 -0700 Subject: Re: [PATCH v2 10/12] ASoC: SOF: Intel: hda: make sure DAI widget is set up before IPC To: =?UTF-8?Q?P=c3=a9ter_Ujfalusi?= , Daniel Baluta , broonie@kernel.org Cc: alsa-devel@alsa-project.org, kai.vehmanen@linux.intel.com, lgirdwood@gmail.com, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, Guennadi Liakhovetski , daniel.baluta@nxp.com References: <20210917143659.401102-1-daniel.baluta@oss.nxp.com> <20210917143659.401102-11-daniel.baluta@oss.nxp.com> <203bf6cd-6407-f01d-52c3-e399d06cb3f6@linux.intel.com> From: Pierre-Louis Bossart Message-ID: Date: Thu, 23 Sep 2021 07:58:36 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <203bf6cd-6407-f01d-52c3-e399d06cb3f6@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> +static struct sof_ipc_dai_config *hda_dai_update_config(struct snd_soc_dapm_widget *w, >> + int channel) >> { >> + struct snd_sof_widget *swidget = w->dobj.private; >> struct sof_ipc_dai_config *config; >> struct snd_sof_dai *sof_dai; >> - struct sof_ipc_reply reply; >> - int ret = 0; >> >> - list_for_each_entry(sof_dai, &hda_stream->sdev->dai_list, list) { >> - if (!sof_dai->cpu_dai_name) >> - continue; >> + if (!swidget) { >> + dev_err(swidget->scomp->dev, "error: No private data for widget %s\n", w->name); > > NULL pointer dereference, just return NULL without the print. The caller > is printing anyways. yes good catch, we need a v3 with the fixes suggested by Peter in https://github.com/thesofproject/linux/pull/3171/ applied. 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=-10.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 384AAC433EF for ; Thu, 23 Sep 2021 12:59:47 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0BAD2610C8 for ; Thu, 23 Sep 2021 12:59:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0BAD2610C8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id C6417822; Thu, 23 Sep 2021 14:58:53 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C6417822 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1632401983; bh=kNss1sGn/Cg4j27KfyPFj48927IjxE3yUIdZFP/iATY=; h=Subject:To:References:From:Date:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=hidSFTfyIiWI77E4Ac0AsIJVcuRkZSn1YeaBhq5mtVT2JCDzUpVLn5D+TEqqCD+LJ VRYNugXQcgHi0XrNi+PXX40vPuEsLdMykbe2Ke1HNHa/x5HGUPt8rbW5XYL9MhrCX2 OGM05DBjpn3Gup/CyyTTWbv1nVfXqRCUJWdn8FME= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 46828F8025F; Thu, 23 Sep 2021 14:58:53 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id F024CF80268; Thu, 23 Sep 2021 14:58:51 +0200 (CEST) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 6F339F8013F for ; Thu, 23 Sep 2021 14:58:42 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 6F339F8013F X-IronPort-AV: E=McAfee;i="6200,9189,10115"; a="284845395" X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="284845395" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 05:58:40 -0700 X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="558348226" Received: from upatel2-mobl.amr.corp.intel.com (HELO [10.251.134.231]) ([10.251.134.231]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 05:58:39 -0700 Subject: Re: [PATCH v2 10/12] ASoC: SOF: Intel: hda: make sure DAI widget is set up before IPC To: =?UTF-8?Q?P=c3=a9ter_Ujfalusi?= , Daniel Baluta , broonie@kernel.org References: <20210917143659.401102-1-daniel.baluta@oss.nxp.com> <20210917143659.401102-11-daniel.baluta@oss.nxp.com> <203bf6cd-6407-f01d-52c3-e399d06cb3f6@linux.intel.com> From: Pierre-Louis Bossart Message-ID: Date: Thu, 23 Sep 2021 07:58:36 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <203bf6cd-6407-f01d-52c3-e399d06cb3f6@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Cc: Guennadi Liakhovetski , alsa-devel@alsa-project.org, kai.vehmanen@linux.intel.com, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, lgirdwood@gmail.com, daniel.baluta@nxp.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" >> +static struct sof_ipc_dai_config *hda_dai_update_config(struct snd_soc_dapm_widget *w, >> + int channel) >> { >> + struct snd_sof_widget *swidget = w->dobj.private; >> struct sof_ipc_dai_config *config; >> struct snd_sof_dai *sof_dai; >> - struct sof_ipc_reply reply; >> - int ret = 0; >> >> - list_for_each_entry(sof_dai, &hda_stream->sdev->dai_list, list) { >> - if (!sof_dai->cpu_dai_name) >> - continue; >> + if (!swidget) { >> + dev_err(swidget->scomp->dev, "error: No private data for widget %s\n", w->name); > > NULL pointer dereference, just return NULL without the print. The caller > is printing anyways. yes good catch, we need a v3 with the fixes suggested by Peter in https://github.com/thesofproject/linux/pull/3171/ applied.