linux-kernel - [PATCH] ASoC: SOF: Fix incorrect use of sizeof in sof_ipc3_do_rx

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Date:   Mon, 7 Aug 2023 15:51:18 +0800
From:   Xia Fukun <xiafukun@...wei.com>
To:     <peter.ujfalusi@...ux.intel.com>, <broonie@...nel.org>,
        <pierre-louis.bossart@...ux.intel.com>,
        <ranjani.sridharan@...ux.intel.com>,
        <yung-chuan.liao@...ux.intel.com>, <cujomalainey@...omium.org>,
        <noah.klayman@...el.com>, <daniel.baluta@....com>,
        <rander.wang@...el.com>
CC:     <linux-kernel@...r.kernel.org>, <xiafukun@...wei.com>
Subject: [PATCH] ASoC: SOF: Fix incorrect use of sizeof in sof_ipc3_do_rx_work()

Here hdr is a pointer, and we should measure the size of
struct sof_ipc_cmd_hdr.

Fixes: 12c41c779fad ("ASoC: SOF: Refactor rx function for fuzzing")
Signed-off-by: Xia Fukun <xiafukun@...wei.com>
---
 sound/soc/sof/ipc3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sof/ipc3.c b/sound/soc/sof/ipc3.c
index 2c5aac31e8b0..580960ff273d 100644
--- a/sound/soc/sof/ipc3.c
+++ b/sound/soc/sof/ipc3.c
@@ -1001,7 +1001,7 @@ void sof_ipc3_do_rx_work(struct snd_sof_dev *sdev, struct sof_ipc_cmd_hdr *hdr,
 
 	ipc3_log_header(sdev->dev, "ipc rx", hdr->cmd);
 
-	if (hdr->size < sizeof(hdr) || hdr->size > SOF_IPC_MSG_MAX_SIZE) {
+	if (hdr->size < sizeof(*hdr) || hdr->size > SOF_IPC_MSG_MAX_SIZE) {
 		dev_err(sdev->dev, "The received message size is invalid: %u\n",
 			hdr->size);
 		return;
-- 
2.17.1