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 8B559CE79CE for ; Wed, 20 Sep 2023 11:57:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235045AbjITL51 (ORCPT ); Wed, 20 Sep 2023 07:57:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234884AbjITL5V (ORCPT ); Wed, 20 Sep 2023 07:57:21 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1FA412F for ; Wed, 20 Sep 2023 04:57:05 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66DA2C433CC; Wed, 20 Sep 2023 11:57:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695211025; bh=tc35an1yL6bdqHVeKrwODlFTyysbOo07uho2dXSYu0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V5040v+h11bmrTfUh0WXzy6MkeWFC9XAetNLe9MU2eYGXG4utFKYqu4Pbx9AvrQGb /GhMClqRT1OIBbB6i3jIPdAfdsDKhveIq3dBYB9lw6LW85v1wgB+Dgd0ikPmTr+Bmu GIFnfwyD2cq/UioWTG+jsKP7kxyUthlR79nNWroc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pierre-Louis Bossart , Rander Wang , Daniel Baluta , Yaochun Hung , Mark Brown , Sasha Levin Subject: [PATCH 6.1 047/139] ASoC: SOF: topology: simplify code to prevent static analysis warnings Date: Wed, 20 Sep 2023 13:29:41 +0200 Message-ID: <20230920112837.387018223@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112835.549467415@linuxfoundation.org> References: <20230920112835.549467415@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore 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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pierre-Louis Bossart [ Upstream commit 55cb3dc271d81f1982c949a2ac483a6daf613b92 ] make KCFLAGS='-fanalyzer' sound/soc/sof/intel/ reports a possible NULL pointer dereference. sound/soc/sof/topology.c:1136:21: error: dereference of NULL ‘w’ [CWE-476] [-Werror=analyzer-null-dereference] 1136 | strcmp(w->sname, rtd->dai_link->stream_name)) The code is rather confusing and can be simplified to make static analysis happy. No functionality change. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Reviewed-by: Daniel Baluta Reviewed-by: Yaochun Hung Link: https://lore.kernel.org/r/20230731213748.440285-4-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sof/topology.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index 872e44408298f..e7305ce57ea1f 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -1086,16 +1086,17 @@ static void sof_disconnect_dai_widget(struct snd_soc_component *scomp, { struct snd_soc_card *card = scomp->card; struct snd_soc_pcm_runtime *rtd; + const char *sname = w->sname; struct snd_soc_dai *cpu_dai; int i; - if (!w->sname) + if (!sname) return; list_for_each_entry(rtd, &card->rtd_list, list) { /* does stream match DAI link ? */ if (!rtd->dai_link->stream_name || - strcmp(w->sname, rtd->dai_link->stream_name)) + strcmp(sname, rtd->dai_link->stream_name)) continue; switch (w->id) { -- 2.40.1