From patchwork Tue Jul 12 12:23:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?P=C3=A9ter_Ujfalusi?= X-Patchwork-Id: 590908 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 0F34CC43334 for ; Tue, 12 Jul 2022 12:24:44 +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 2F167168B; Tue, 12 Jul 2022 14:23:53 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2F167168B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1657628683; bh=3d4mAq7owzg6AlbTOhlLET60zO9JyD046eHzvhlalCs=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=e/i0zLkX6qr/zc2iasmz9NGzjln680GA05zcRXfUmdtdKTJSuJiiCv/Rw08ihEuBh bQhOafoIgpdb++yY3X0LdGPPoqKqZ/FlzVsVjNAiU7ULdD7PJc8yFKrlxmI90jQHug oTJWQiAQg9s7dzIGDib/rgMzlmYrahYAJc+8VT4Q= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 4E50AF8023B; Tue, 12 Jul 2022 14:23:25 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 34B6BF800BD; Tue, 12 Jul 2022 14:23:23 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 672C7F800BD for ; Tue, 12 Jul 2022 14:23:15 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 672C7F800BD Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Pm2v+wPl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657628597; x=1689164597; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3d4mAq7owzg6AlbTOhlLET60zO9JyD046eHzvhlalCs=; b=Pm2v+wPlWfZ8WAD604lVQYYggkXeQGnutT96bPl/QGB39IiIMSmST48k MANBux9fKAT7gUs12dXPvOBlDaLMuzvimPFa1bBHZgpx3eV5D0gpAOSvr S8iEUH8V6SqmH6Z3rW9yrQCOBqThWC2qQvrkIsWxYcgpNRZMmWFzTlDml B7zK7jLXHjHO8vD93GL82Ma6fA+kiU7Dev+sp0pJgkh8aeQ4CogYdpCKK SM58stwNJSWCfIBg4sweUhaYZWh1nUZcdurzemEZMnmWpRtXLcgxNKFrs i+7NLcV6MkBWsRBELLZtou7sUJ2FUsNi0aalFRT6jROxjDHc54+UswTU7 Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10405"; a="284945768" X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="284945768" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:13 -0700 X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="922178909" Received: from ahedstro-mobl.ger.corp.intel.com (HELO pujfalus-desk.ger.corp.intel.com) ([10.249.254.175]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:11 -0700 From: Peter Ujfalusi To: lgirdwood@gmail.com, broonie@kernel.org, pierre-louis.bossart@linux.intel.com Subject: [PATCH 1/3] ASoC: SOF: Intel: cnl: Do not process IPC reply before firmware boot Date: Tue, 12 Jul 2022 15:23:55 +0300 Message-Id: <20220712122357.31282-2-peter.ujfalusi@linux.intel.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> References: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> MIME-Version: 1.0 Cc: 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 not yet clear, but it is possible to create a firmware so broken that it will send a reply message before a FW_READY message (it is not yet clear if FW_READY will arrive later). Since the reply_data is allocated only after the FW_READY message, this will lead to a NULL pointer dereference if not filtered out. The issue was reported with IPC4 firmware but the same condition is present for IPC3. Reported-by: Kai Vehmanen Signed-off-by: Peter Ujfalusi Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart --- sound/soc/sof/intel/cnl.c | 37 ++++++++++++++++++++++++------------- 1 file changed, 24 insertions(+), 13 deletions(-) diff --git a/sound/soc/sof/intel/cnl.c b/sound/soc/sof/intel/cnl.c index ccf46fcd6c9a..a064453f0bc3 100644 --- a/sound/soc/sof/intel/cnl.c +++ b/sound/soc/sof/intel/cnl.c @@ -60,17 +60,23 @@ irqreturn_t cnl_ipc4_irq_thread(int irq, void *context) if (primary & SOF_IPC4_MSG_DIR_MASK) { /* Reply received */ - struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; + if (likely(sdev->fw_state == SOF_FW_BOOT_COMPLETE)) { + struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; - data->primary = primary; - data->extension = extension; + data->primary = primary; + data->extension = extension; - spin_lock_irq(&sdev->ipc_lock); + spin_lock_irq(&sdev->ipc_lock); - snd_sof_ipc_get_reply(sdev); - snd_sof_ipc_reply(sdev, data->primary); + snd_sof_ipc_get_reply(sdev); + snd_sof_ipc_reply(sdev, data->primary); - spin_unlock_irq(&sdev->ipc_lock); + spin_unlock_irq(&sdev->ipc_lock); + } else { + dev_dbg_ratelimited(sdev->dev, + "IPC reply before FW_READY: %#x|%#x\n", + primary, extension); + } } else { /* Notification received */ notification_data.primary = primary; @@ -124,15 +130,20 @@ irqreturn_t cnl_ipc_irq_thread(int irq, void *context) CNL_DSP_REG_HIPCCTL, CNL_DSP_REG_HIPCCTL_DONE, 0); - spin_lock_irq(&sdev->ipc_lock); + if (likely(sdev->fw_state == SOF_FW_BOOT_COMPLETE)) { + spin_lock_irq(&sdev->ipc_lock); - /* handle immediate reply from DSP core */ - hda_dsp_ipc_get_reply(sdev); - snd_sof_ipc_reply(sdev, msg); + /* handle immediate reply from DSP core */ + hda_dsp_ipc_get_reply(sdev); + snd_sof_ipc_reply(sdev, msg); - cnl_ipc_dsp_done(sdev); + cnl_ipc_dsp_done(sdev); - spin_unlock_irq(&sdev->ipc_lock); + spin_unlock_irq(&sdev->ipc_lock); + } else { + dev_dbg_ratelimited(sdev->dev, "IPC reply before FW_READY: %#x\n", + msg); + } ipc_irq = true; } From patchwork Tue Jul 12 12:23:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?P=C3=A9ter_Ujfalusi?= X-Patchwork-Id: 589826 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 6054AC433EF for ; Tue, 12 Jul 2022 12:25:04 +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 32F651683; Tue, 12 Jul 2022 14:24:12 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 32F651683 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1657628702; bh=3WhREe0ejtgl2ZdjfM+ZJiWyXQ4Xgunx1CZ9dpQfQfw=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=pNrNMjfEXaYWc11jmytRiOh4EFPS2N2PvqezQns2e0NeelGI09WurY+x6EOgkgD0j iDT/QyIr3gMjS2Ecvz6EvOdrf8eJXrZSNXhNpjOC9Y3YtsKT5Scosfp5fEUaKAAmGu a/nyeympjmOJJVcLAC624nbBt1LcQZiUpIQCGEqc= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 097E7F80542; Tue, 12 Jul 2022 14:23:27 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 454B7F8053D; Tue, 12 Jul 2022 14:23:25 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 505A0F8023B for ; Tue, 12 Jul 2022 14:23:17 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 505A0F8023B Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="mSpjIw35" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657628599; x=1689164599; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3WhREe0ejtgl2ZdjfM+ZJiWyXQ4Xgunx1CZ9dpQfQfw=; b=mSpjIw355z2G6+efomfQHnyQNgric3daMrgFUx78bgwgjL64jW23EFZh gI//Yj36I/QGEfLBU9JhDyNO/CDRQqUouFNYFkBIQbYu+OeIyJbhmWdKF 8gtTN8YxZ9cYrM7yFtfEh5OwLGM1Gsdyr6rfLWQIuoRSRq5V9GHmTk9Jp ukq4akbUQIXuXvW63lRX1J9uuBeFDtw+lDwvH6agLg2IHDM4BgSeuy2XB 5wu6SdK39vhW7S95E8sMhG+ra1XQnM/+uZXGTiDCP88YfTIeCo5j60oBH BDZbgZw7mDKfe4GMxMTzfq+YvfAXD7ThySAgZIVVIkDDeVnDlfgYUJXs+ g==; X-IronPort-AV: E=McAfee;i="6400,9594,10405"; a="284945774" X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="284945774" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:15 -0700 X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="922178911" Received: from ahedstro-mobl.ger.corp.intel.com (HELO pujfalus-desk.ger.corp.intel.com) ([10.249.254.175]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:14 -0700 From: Peter Ujfalusi To: lgirdwood@gmail.com, broonie@kernel.org, pierre-louis.bossart@linux.intel.com Subject: [PATCH 2/3] ASoC: SOF: Intel: hda-ipc: Do not process IPC reply before firmware boot Date: Tue, 12 Jul 2022 15:23:56 +0300 Message-Id: <20220712122357.31282-3-peter.ujfalusi@linux.intel.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> References: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> MIME-Version: 1.0 Cc: 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 not yet clear, but it is possible to create a firmware so broken that it will send a reply message before a FW_READY message (it is not yet clear if FW_READY will arrive later). Since the reply_data is allocated only after the FW_READY message, this will lead to a NULL pointer dereference if not filtered out. The issue was reported with IPC4 firmware but the same condition is present for IPC3. Reported-by: Kai Vehmanen Signed-off-by: Peter Ujfalusi Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart --- sound/soc/sof/intel/hda-ipc.c | 39 ++++++++++++++++++++++------------- 1 file changed, 25 insertions(+), 14 deletions(-) diff --git a/sound/soc/sof/intel/hda-ipc.c b/sound/soc/sof/intel/hda-ipc.c index f08011249955..65e688f749ea 100644 --- a/sound/soc/sof/intel/hda-ipc.c +++ b/sound/soc/sof/intel/hda-ipc.c @@ -148,17 +148,23 @@ irqreturn_t hda_dsp_ipc4_irq_thread(int irq, void *context) if (primary & SOF_IPC4_MSG_DIR_MASK) { /* Reply received */ - struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; + if (likely(sdev->fw_state == SOF_FW_BOOT_COMPLETE)) { + struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; - data->primary = primary; - data->extension = extension; + data->primary = primary; + data->extension = extension; - spin_lock_irq(&sdev->ipc_lock); + spin_lock_irq(&sdev->ipc_lock); - snd_sof_ipc_get_reply(sdev); - snd_sof_ipc_reply(sdev, data->primary); + snd_sof_ipc_get_reply(sdev); + snd_sof_ipc_reply(sdev, data->primary); - spin_unlock_irq(&sdev->ipc_lock); + spin_unlock_irq(&sdev->ipc_lock); + } else { + dev_dbg_ratelimited(sdev->dev, + "IPC reply before FW_READY: %#x|%#x\n", + primary, extension); + } } else { /* Notification received */ @@ -225,16 +231,21 @@ irqreturn_t hda_dsp_ipc_irq_thread(int irq, void *context) * place, the message might not yet be marked as expecting a * reply. */ - spin_lock_irq(&sdev->ipc_lock); + if (likely(sdev->fw_state == SOF_FW_BOOT_COMPLETE)) { + spin_lock_irq(&sdev->ipc_lock); - /* handle immediate reply from DSP core */ - hda_dsp_ipc_get_reply(sdev); - snd_sof_ipc_reply(sdev, msg); + /* handle immediate reply from DSP core */ + hda_dsp_ipc_get_reply(sdev); + snd_sof_ipc_reply(sdev, msg); - /* set the done bit */ - hda_dsp_ipc_dsp_done(sdev); + /* set the done bit */ + hda_dsp_ipc_dsp_done(sdev); - spin_unlock_irq(&sdev->ipc_lock); + spin_unlock_irq(&sdev->ipc_lock); + } else { + dev_dbg_ratelimited(sdev->dev, "IPC reply before FW_READY: %#x\n", + msg); + } ipc_irq = true; } From patchwork Tue Jul 12 12:23:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?P=C3=A9ter_Ujfalusi?= X-Patchwork-Id: 590907 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 C226EC43334 for ; Tue, 12 Jul 2022 12:25:06 +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 0D65F1696; Tue, 12 Jul 2022 14:24:15 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 0D65F1696 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1657628705; bh=yftBh4Zn0heBid2RbwTCb4swAoo2TXf5ztlFFKI6uSo=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=FBzl1Y5tXwfo1yzqi+P4TWs1Y87+d4EVosjrxhwnMlARbTEgVsJGjeXLx9pyPeqeI 8F087pfYMxZnGOpUXugYP8NewhXVvCF5XfgXNrgoHXnnJirHfrbytZPIE/TgePOqZe xZSzHl7P2ChkYBzU+O78600VNE3M0lwqDnxhdmYs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 8C693F80549; Tue, 12 Jul 2022 14:23:27 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 9C488F80543; Tue, 12 Jul 2022 14:23:25 +0200 (CEST) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 6E955F80246 for ; Tue, 12 Jul 2022 14:23:18 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 6E955F80246 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="RaaFwgMC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657628599; x=1689164599; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yftBh4Zn0heBid2RbwTCb4swAoo2TXf5ztlFFKI6uSo=; b=RaaFwgMCXCaMPZbO8p0iwEps9gjWRqOrK61ntynwa3JDZgJym7lH27Ue vAZ8wj+Y2Qpqc8S4ku62C1BIpL0SlJykHPcmOQY/HFiWSUdyLPjjifUX5 ZauDjKxRMan2C1fAyrHzGDtiwb1GOWACwTqB8K+VDYgaqEZYwR8xkN3YN ROKSj9JWh1kwROlkETqmFfWwSH7/IfyneOD7Sm7VZcrd54JRcEH/fxjxI m7iozvDg24GFI+jVHJ3+YeG2iKWWOtgVxUFcntP5T8XL/u6O2kSC6j6wR Fp7QhIbnaE3w0T6DMm9wwKIXZAq/cVeaoihBQYFEHLnXMZXXXhSQd/7/m w==; X-IronPort-AV: E=McAfee;i="6400,9594,10405"; a="284945779" X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="284945779" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:18 -0700 X-IronPort-AV: E=Sophos;i="5.92,265,1650956400"; d="scan'208";a="922178917" Received: from ahedstro-mobl.ger.corp.intel.com (HELO pujfalus-desk.ger.corp.intel.com) ([10.249.254.175]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2022 05:23:16 -0700 From: Peter Ujfalusi To: lgirdwood@gmail.com, broonie@kernel.org, pierre-louis.bossart@linux.intel.com Subject: [PATCH 3/3] ASoC: SOF: Intel: mtl: Do not process IPC reply before firmware boot Date: Tue, 12 Jul 2022 15:23:57 +0300 Message-Id: <20220712122357.31282-4-peter.ujfalusi@linux.intel.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> References: <20220712122357.31282-1-peter.ujfalusi@linux.intel.com> MIME-Version: 1.0 Cc: 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 not yet clear, but it is possible to create a firmware so broken that it will send a reply message before a FW_READY message (it is not yet clear if FW_READY will arrive later). Since the reply_data is allocated only after the FW_READY message, this will lead to a NULL pointer dereference if not filtered out. Reported-by: Kai Vehmanen Signed-off-by: Peter Ujfalusi Reviewed-by: Ranjani Sridharan Reviewed-by: Pierre-Louis Bossart --- sound/soc/sof/intel/mtl.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/sound/soc/sof/intel/mtl.c b/sound/soc/sof/intel/mtl.c index 3a043589c12b..a5e244ea0688 100644 --- a/sound/soc/sof/intel/mtl.c +++ b/sound/soc/sof/intel/mtl.c @@ -512,17 +512,23 @@ static irqreturn_t mtl_ipc_irq_thread(int irq, void *context) */ if (primary & SOF_IPC4_MSG_DIR_MASK) { /* Reply received */ - struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; + if (likely(sdev->fw_state == SOF_FW_BOOT_COMPLETE)) { + struct sof_ipc4_msg *data = sdev->ipc->msg.reply_data; - data->primary = primary; - data->extension = extension; + data->primary = primary; + data->extension = extension; - spin_lock_irq(&sdev->ipc_lock); + spin_lock_irq(&sdev->ipc_lock); - snd_sof_ipc_get_reply(sdev); - snd_sof_ipc_reply(sdev, data->primary); + snd_sof_ipc_get_reply(sdev); + snd_sof_ipc_reply(sdev, data->primary); - spin_unlock_irq(&sdev->ipc_lock); + spin_unlock_irq(&sdev->ipc_lock); + } else { + dev_dbg_ratelimited(sdev->dev, + "IPC reply before FW_READY: %#x|%#x\n", + primary, extension); + } } else { /* Notification received */ notification_data.primary = primary;