From patchwork Mon Oct 10 12:07:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cezary Rojewski X-Patchwork-Id: 13002523 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 08062C433FE for ; Mon, 10 Oct 2022 11:53:10 +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 2B9D028DD; Mon, 10 Oct 2022 13:52:18 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2B9D028DD DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1665402788; bh=WITP0r5AgZxlVo1fQXrFXmw6o2iVJQ0gaMwaR+xtqFY=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=LA3Li4HJX7YcnNjJwXy9nSYkOm0fXqn7x69nWts78SNPAszLrVSNS/bAQaw/Llt2m dtmhan/9030xA15AJsxySQWXYfz6asoYfnaWCGk9gYtobZYNpwkqIF8bEQ+8hKvrU4 DhCUHNxvfqojIPJQHw/B2ql34qmRrhLlkD2CzPKM= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id E7C79F80548; Mon, 10 Oct 2022 13:51:49 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 69A7DF80543; Mon, 10 Oct 2022 13:51:47 +0200 (CEST) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) (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 98628F800B8 for ; Mon, 10 Oct 2022 13:51:40 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 98628F800B8 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="KHR8eOTj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1665402701; x=1696938701; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WITP0r5AgZxlVo1fQXrFXmw6o2iVJQ0gaMwaR+xtqFY=; b=KHR8eOTjDeHsE4p/ZCdLj3fpxwhELcfOZy9WZoHgOmEA7NsykXrlXr4P PK7azGaq66ol6Ao64Aw0Li/LHP4wdqhw+M/EWau5Iq9jw2GD+iW89sLcE i5w456vaCyecwYcpNutFNWs0eHCdgihoztD8i2aUolDEBm3Zl0KWp2aFQ lUIXDYZl/kgZ8kjBfWya7jwWBldem6CVztFF/J/CDWa6/Rjn+Y3q3cAeR teYxUF+5K6eX6aWS3H1oyoPdK80ggvkLvtwFukql6tn0VPBkuT/mBtPag AKepem49wNfulVyEKqtVSOe1E3Ue9KSQTNxbX9G/CgfyyGhDgIOJuDB3J A==; X-IronPort-AV: E=McAfee;i="6500,9779,10495"; a="390513215" X-IronPort-AV: E=Sophos;i="5.95,173,1661842800"; d="scan'208";a="390513215" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2022 04:51:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10495"; a="954889042" X-IronPort-AV: E=Sophos;i="5.95,173,1661842800"; d="scan'208";a="954889042" Received: from crojewsk-ctrl.igk.intel.com ([10.102.9.28]) by fmsmga005.fm.intel.com with ESMTP; 10 Oct 2022 04:51:38 -0700 From: Cezary Rojewski To: alsa-devel@alsa-project.org, broonie@kernel.org Subject: [PATCH 02/15] ASoC: Intel: avs: Fix potential RX buffer overflow Date: Mon, 10 Oct 2022 14:07:36 +0200 Message-Id: <20221010120749.716499-3-cezary.rojewski@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221010120749.716499-1-cezary.rojewski@intel.com> References: <20221010120749.716499-1-cezary.rojewski@intel.com> MIME-Version: 1.0 Cc: Cezary Rojewski , CoolStar , pierre-louis.bossart@linux.intel.com, tiwai@suse.com, hdegoede@redhat.com, amadeuszx.slawinski@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" If an event caused firmware to return invalid RX size for LARGE_CONFIG_GET, memcpy_fromio() could end up copying too many bytes. Fix by utilizing min_t(). Reported-by: CoolStar Fixes: f14a1c5a9f83 ("ASoC: Intel: avs: Add module management requests") Signed-off-by: Cezary Rojewski --- sound/soc/intel/avs/ipc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/intel/avs/ipc.c b/sound/soc/intel/avs/ipc.c index 020d85c7520d..77da206f7dbb 100644 --- a/sound/soc/intel/avs/ipc.c +++ b/sound/soc/intel/avs/ipc.c @@ -192,7 +192,8 @@ static void avs_dsp_receive_rx(struct avs_dev *adev, u64 header) /* update size in case of LARGE_CONFIG_GET */ if (msg.msg_target == AVS_MOD_MSG && msg.global_msg_type == AVS_MOD_LARGE_CONFIG_GET) - ipc->rx.size = msg.ext.large_config.data_off_size; + ipc->rx.size = min_t(u32, AVS_MAILBOX_SIZE, + msg.ext.large_config.data_off_size); memcpy_fromio(ipc->rx.data, avs_uplink_addr(adev), ipc->rx.size); trace_avs_msg_payload(ipc->rx.data, ipc->rx.size);