[PATCH -next v2] speakup: i18n: Switch to kmemdup_nul() in spk_msg_set()

[Yang Yingliang]

Use kmemdup_nul() helper instead of open-coding to
simplify the code in spk_msg_set().

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
V2:
   change the tile and commit log.
---
 drivers/accessibility/speakup/i18n.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/accessibility/speakup/i18n.c b/drivers/accessibility/speakup/i18n.c
index ee240d36f947..46bd50f3c3a4 100644
--- a/drivers/accessibility/speakup/i18n.c
+++ b/drivers/accessibility/speakup/i18n.c
@@ -548,12 +548,10 @@ ssize_t spk_msg_set(enum msg_index_t index, char *text, size_t length)
 	if ((index < MSG_FIRST_INDEX) || (index >= MSG_LAST_INDEX))
 		return -EINVAL;
 
-	newstr = kmalloc(length + 1, GFP_KERNEL);
+	newstr = kmemdup_nul(text, length, GFP_KERNEL);
 	if (!newstr)
 		return -ENOMEM;
 
-	memcpy(newstr, text, length);
-	newstr[length] = '\0';
 	if (index >= MSG_FORMATTED_START &&
 	    index <= MSG_FORMATTED_END &&
 	    !fmt_validate(speakup_default_msgs[index], newstr)) {
-- 
2.25.1