linux-kernel - [PATCH] staging: fieldbus: convert snprintf to scnprintf

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Date:   Wed, 2 Nov 2022 23:55:52 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     outreachy@...ts.linux.dev, Sven Van Asbroeck <TheSven73@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: fieldbus: convert snprintf to scnprintf

It is recommended to use scnprintf instead of snprintf to accurately
return the size of the encoded data. Following article [1] has details
on the reason for this kernel level migration. This issue was identified
using coccicheck.

[1] https://lwn.net/Articles/69419/

Signed-off-by: Deepak R Varma <drv@...lo.com>
---
 drivers/staging/fieldbus/dev_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/fieldbus/dev_core.c b/drivers/staging/fieldbus/dev_core.c
index 5aab734606ea..d51f2b02d5e6 100644
--- a/drivers/staging/fieldbus/dev_core.c
+++ b/drivers/staging/fieldbus/dev_core.c
@@ -70,7 +70,7 @@ static ssize_t card_name_show(struct device *dev, struct device_attribute *attr,
 	 * card_name was provided by child driver, could potentially be long.
 	 * protect against buffer overrun.
 	 */
-	return snprintf(buf, PAGE_SIZE, "%s\n", fb->card_name);
+	return scnprintf(buf, PAGE_SIZE, "%s\n", fb->card_name);
 }
 static DEVICE_ATTR_RO(card_name);

--
2.34.1