From 1919b42ca4ad75a2397081164661af3ce5a7b8f4 Mon Sep 17 00:00:00 2001 From: Jaska Uimonen Date: Fri, 28 Feb 2020 17:18:48 -0600 Subject: [PATCH] ASoC: SOF: ipc: check ipc return value before data copy In tx_wait_done the ipc payload is copied before the DSP transaction error code is checked. This might lead to corrupted data in kernel side even though the error would be handled later. It is also pointless to copy the data in case of error. So change the order of error check and copy. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Jaska Uimonen Link: https://lore.kernel.org/r/20200228231850.9226-3-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/ipc.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index 22d296f95761..cc5762706c9c 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -214,15 +214,17 @@ static int tx_wait_done(struct snd_sof_ipc *ipc, struct snd_sof_ipc_msg *msg, snd_sof_handle_fw_exception(ipc->sdev); ret = -ETIMEDOUT; } else { - /* copy the data returned from DSP */ ret = msg->reply_error; - if (msg->reply_size) - memcpy(reply_data, msg->reply_data, msg->reply_size); - if (ret < 0) + if (ret < 0) { dev_err(sdev->dev, "error: ipc error for 0x%x size %zu\n", hdr->cmd, msg->reply_size); - else + } else { ipc_log_header(sdev->dev, "ipc tx succeeded", hdr->cmd); + if (msg->reply_size) + /* copy the data returned from DSP */ + memcpy(reply_data, msg->reply_data, + msg->reply_size); + } } return ret; -- 2.30.2