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 69A67C6FD1F for ; Wed, 22 Mar 2023 20:28:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231417AbjCVU2f (ORCPT ); Wed, 22 Mar 2023 16:28:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230179AbjCVU2O (ORCPT ); Wed, 22 Mar 2023 16:28:14 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46B83570A7; Wed, 22 Mar 2023 13:18:45 -0700 (PDT) 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 886D9622B9; Wed, 22 Mar 2023 20:02:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0CA87C433D2; Wed, 22 Mar 2023 20:02:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679515369; bh=I86NJCPu1+KiO59bQFYOpha356Tl4KQfy3wuYdiGe9c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D6z/CFHz3MANQf2wKE+BfFvJKrJ86DEoeyTzMRgwp7iE4ld8gR786QCi0h9EGRIUJ PGBpDWpBTWCCig5ZiB+RreUpFIIjqwCZwcG1J0+UzJWNWXCIuNMjLD8IegbwcH6WgV 8+KhkDGUWvKqQSAmCxw7QMQigWRQ+g78q73AyLHDQWFu0MIUkxCmdpv/8fTQPicB5j cTmbNPOtkwNkMcVZDmckdSdLI2OgpJqlUX95JfvDylSOyQKz3nFOoVWwBxrAvjon91 FdzS9xkLQVboVBVSdw3DLvhsCUEDgRSisLfVtc3IT5+5O4cY2QHS/uWAd871N1m9KI Wg7f2xDGBBnSQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kuninori Morimoto , Takashi Iwai , Sasha Levin , perex@perex.cz, tiwai@suse.com, dengshaomin@cdjrlc.com, alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 5.4 2/9] ALSA: asihpi: check pao in control_message() Date: Wed, 22 Mar 2023 16:02:34 -0400 Message-Id: <20230322200242.1997527-2-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230322200242.1997527-1-sashal@kernel.org> References: <20230322200242.1997527-1-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: Kuninori Morimoto [ Upstream commit 9026c0bf233db53b86f74f4c620715e94eb32a09 ] control_message() might be called with pao = NULL. Here indicates control_message() as sample. (B) static void control_message(struct hpi_adapter_obj *pao, ...) { ^^^ struct hpi_hw_obj *phw = pao->priv; ... ^^^ } (A) void _HPI_6205(struct hpi_adapter_obj *pao, ...) { ^^^ ... case HPI_OBJ_CONTROL: (B) control_message(pao, phm, phr); break; ^^^ ... } void HPI_6205(...) { ... (A) _HPI_6205(NULL, phm, phr); ... ^^^^ } Therefore, We will get too many warning via cppcheck, like below sound/pci/asihpi/hpi6205.c:238:27: warning: Possible null pointer dereference: pao [nullPointer] struct hpi_hw_obj *phw = pao->priv; ^ sound/pci/asihpi/hpi6205.c:433:13: note: Calling function '_HPI_6205', 1st argument 'NULL' value is 0 _HPI_6205(NULL, phm, phr); ^ sound/pci/asihpi/hpi6205.c:401:20: note: Calling function 'control_message', 1st argument 'pao' value is 0 control_message(pao, phm, phr); ^ Set phr->error like many functions doing, and don't call _HPI_6205() with NULL. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87ttypeaqz.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/pci/asihpi/hpi6205.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/pci/asihpi/hpi6205.c b/sound/pci/asihpi/hpi6205.c index 3d6914c64c4a8..4cdaeefeb6885 100644 --- a/sound/pci/asihpi/hpi6205.c +++ b/sound/pci/asihpi/hpi6205.c @@ -430,7 +430,7 @@ void HPI_6205(struct hpi_message *phm, struct hpi_response *phr) pao = hpi_find_adapter(phm->adapter_index); } else { /* subsys messages don't address an adapter */ - _HPI_6205(NULL, phm, phr); + phr->error = HPI_ERROR_INVALID_OBJ_INDEX; return; } -- 2.39.2