linux-kernel - [PATCH -next v2] net: hns3: replace snprintf with scnprintf in hns3_dbg_cmd

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Date:   Mon, 20 Jan 2020 20:49:43 +0800
From:   Chen Zhou <chenzhou10@...wei.com>
To:     <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>,
        <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chenzhou10@...wei.com>
Subject: [PATCH -next v2] net: hns3: replace snprintf with scnprintf in hns3_dbg_cmd_read

The return value of snprintf may be greater than the size of
HNS3_DBG_READ_LEN, use scnprintf instead in hns3_dbg_cmd_read.

Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
---

changes in v2:
- fix checkpatch style problem.

---
 drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
index 6b328a2..92ee1f5 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -297,8 +297,8 @@ static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,
 	if (!buf)
 		return -ENOMEM;
 
-	len = snprintf(buf, HNS3_DBG_READ_LEN, "%s\n",
-		       "Please echo help to cmd to get help information");
+	len = scnprintf(buf, HNS3_DBG_READ_LEN, "%s\n",
+			"Please echo help to cmd to get help information");
 	uncopy_bytes = copy_to_user(buffer, buf, len);
 
 	kfree(buf);
-- 
2.7.4