From patchwork Wed Apr 27 18:52:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 567503 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 68A50C433F5 for ; Wed, 27 Apr 2022 18:53:05 +0000 (UTC) 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 2CED8829; Wed, 27 Apr 2022 20:52:13 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2CED8829 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1651085583; bh=NHQYI3Vhw9MnDdWzlP/cexGyEJdg43ldqI7MQDdp9Ac=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=VzsGD3nmCCXYE2L7L91XL+0GpmwyERpZP4qL9g8A74wP5zjJYu+NaFrkmCmjA06WQ Pq3KuArNMb9OgncXieZam1lOtgv2LCFvyGbpwuQfOx1/u0SiMtsObtrBslD23jb9NB W1q3KKIrl2XW/P2xyDPLzYBSsmw6LHFFJUFYzQTs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 7E4AFF80100; Wed, 27 Apr 2022 20:52:12 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 00553F8016E; Wed, 27 Apr 2022 20:52:09 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (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 D622CF80152 for ; Wed, 27 Apr 2022 20:52:01 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz D622CF80152 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="W5eTMbGK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1651085524; x=1682621524; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=NHQYI3Vhw9MnDdWzlP/cexGyEJdg43ldqI7MQDdp9Ac=; b=W5eTMbGKLywLiakuiVmveRwzHSl3NgBcFwhjDJkKWvPZ3fC/HrqA+4rW lYaz1clazk5OH3tkNG/PB0eKyG4KEpe1Uy1cBaB8X+gdynGDvSLSTzChe AvlHKCeDz+qzXKz2vPpaLOkw/e0y5zXT5n2H9hzh79I2UkDh7Ctrh9L2q pWuAjCoZb9l7WJBN/FVkn7xKsEXZ8Wr7EHFXIsUw0hDqwmJ0m5N2Bpn8h NBf14wEMYP4+1nLVUDFA/gc2mhDm8QEfzmbmAx1AB9Dvc0i/L7kgdV1qG 01VWwGCpTCr9NYn1MeovMoB3GGdfXYYtH77mZyA1PPWclD1cjxvp+sNvu w==; X-IronPort-AV: E=McAfee;i="6400,9594,10330"; a="263623528" X-IronPort-AV: E=Sophos;i="5.90,293,1643702400"; d="scan'208";a="263623528" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Apr 2022 11:51:58 -0700 X-IronPort-AV: E=Sophos;i="5.90,293,1643702400"; d="scan'208";a="580762651" Received: from rajamsri-mobl2.gar.corp.intel.com (HELO pujfalus-desk.ger.corp.intel.com) ([10.252.58.132]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Apr 2022 11:51:56 -0700 From: Peter Ujfalusi To: lgirdwood@gmail.com, broonie@kernel.org, pierre-louis.bossart@linux.intel.com, senozhatsky@chromium.org Subject: [PATCH v4] ASoC: SOF: ipc3-topology: Correct get_control_data for non bytes payload Date: Wed, 27 Apr 2022 21:52:21 +0300 Message-Id: <20220427185221.28928-1-peter.ujfalusi@linux.intel.com> X-Mailer: git-send-email 2.36.0 MIME-Version: 1.0 Cc: cujomalainey@google.com, alsa-devel@alsa-project.org, ranjani.sridharan@linux.intel.com, kai.vehmanen@linux.intel.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" It is possible to craft a topology where sof_get_control_data() would do out of bounds access because it expects that it is only called when the payload is bytes type. Confusingly it also handles other types of controls, but the payload parsing implementation is only valid for bytes. Fix the code to count the non bytes controls and instead of storing a pointer to sof_abi_hdr in sof_widget_data (which is only valid for bytes), store the pointer to the data itself and add a new member to save the size of the data. In case of non bytes controls we store the pointer to the chanv itself, which is just an array of values at the end. In case of bytes control, drop the wrong cdata->data (wdata[i].pdata) check against NULL since it is incorrect and invalid in this context. The data is pointing to the end of cdata struct, so it should never be null. Reported-by: Sergey Senozhatsky Signed-off-by: Peter Ujfalusi --- Hi, Changes since v3: - Move the comment about validating data along with the code which validates the data (checks the SOF_ABI_MAGIC) Changes since v2: - Drop the cdata->data check against NULL as it is not a valid test and since we are in sof_get_control_data() the memory has been already allocated changes since v1: - adjust the payload size for non bytes controls by subtracting the size of the sof_ipc_ctrl_data struct, plus add comment to note this Regards, Peter sound/soc/sof/ipc3-topology.c | 39 +++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 13 deletions(-) diff --git a/sound/soc/sof/ipc3-topology.c b/sound/soc/sof/ipc3-topology.c index 572bcbfdb356..bc848f556b88 100644 --- a/sound/soc/sof/ipc3-topology.c +++ b/sound/soc/sof/ipc3-topology.c @@ -20,7 +20,8 @@ struct sof_widget_data { int ctrl_type; int ipc_cmd; - struct sof_abi_hdr *pdata; + void *pdata; + size_t pdata_size; struct snd_sof_control *control; }; @@ -784,16 +785,26 @@ static int sof_get_control_data(struct snd_soc_component *scomp, } cdata = wdata[i].control->ipc_control_data; - wdata[i].pdata = cdata->data; - if (!wdata[i].pdata) - return -EINVAL; - /* make sure data is valid - data can be updated at runtime */ - if (widget->dobj.widget.kcontrol_type[i] == SND_SOC_TPLG_TYPE_BYTES && - wdata[i].pdata->magic != SOF_ABI_MAGIC) - return -EINVAL; + if (widget->dobj.widget.kcontrol_type[i] == SND_SOC_TPLG_TYPE_BYTES) { + /* make sure data is valid - data can be updated at runtime */ + if (cdata->data->magic != SOF_ABI_MAGIC) + return -EINVAL; + + wdata[i].pdata = cdata->data->data; + wdata[i].pdata_size = cdata->data->size; + } else { + /* points to the control data union */ + wdata[i].pdata = cdata->chanv; + /* + * wdata[i].control->size is calculated with struct_size + * and includes the size of struct sof_ipc_ctrl_data + */ + wdata[i].pdata_size = wdata[i].control->size - + sizeof(struct sof_ipc_ctrl_data); + } - *size += wdata[i].pdata->size; + *size += wdata[i].pdata_size; /* get data type */ switch (cdata->cmd) { @@ -876,10 +887,12 @@ static int sof_process_load(struct snd_soc_component *scomp, */ if (ipc_data_size) { for (i = 0; i < widget->num_kcontrols; i++) { - memcpy(&process->data[offset], - wdata[i].pdata->data, - wdata[i].pdata->size); - offset += wdata[i].pdata->size; + if (!wdata[i].pdata_size) + continue; + + memcpy(&process->data[offset], wdata[i].pdata, + wdata[i].pdata_size); + offset += wdata[i].pdata_size; } }