linux-kernel - [PATCH linux-next] xfs: use strscpy() to instead of strncpy()

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Message-ID: <202301091940437129873@zte.com.cn>
Date:   Mon, 9 Jan 2023 19:40:43 +0800 (CST)
From:   <yang.yang29@....com.cn>
To:     <djwong@...nel.org>
Cc:     <linux-xfs@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <xu.panda@....com.cn>, <yang.yang29@....com.cn>
Subject: [PATCH linux-next] xfs: use strscpy() to instead of strncpy()

From: Xu Panda <xu.panda@....com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Xu Panda <xu.panda@....com.cn>
Signed-off-by: Yang Yang <yang.yang29@....com.cn>
---
 fs/xfs/xfs_xattr.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 10aa1fd39d2b..913c1794bc2f 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -212,9 +212,7 @@ __xfs_xattr_put_listent(
 	offset = context->buffer + context->count;
 	memcpy(offset, prefix, prefix_len);
 	offset += prefix_len;
-	strncpy(offset, (char *)name, namelen);			/* real name */
-	offset += namelen;
-	*offset = '\0';
+	strscpy(offset, (char *)name, namelen + 1);			/* real name */

 compute_size:
 	context->count += prefix_len + namelen + 1;
-- 
2.15.2