linux-kernel - [PATCH 1/2] [media] pvrusb2-io: Use kmalloc_array() in pvr2_stream_buffer

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Date:   Thu, 22 Dec 2016 20:58:51 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Mike Isely <isely@...ox.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/2] [media] pvrusb2-io: Use kmalloc_array() in
 pvr2_stream_buffer_count()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 22 Dec 2016 19:26:52 +0100

A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/usb/pvrusb2/pvrusb2-io.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-io.c b/drivers/media/usb/pvrusb2/pvrusb2-io.c
index e3103ecd4828..a01510bfc84f 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-io.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-io.c
@@ -312,7 +312,8 @@ static int pvr2_stream_buffer_count(struct pvr2_stream *sp,unsigned int cnt)
 	if (cnt > sp->buffer_total_count) {
 		if (scnt > sp->buffer_slot_count) {
 			struct pvr2_buffer **nb;
-			nb = kmalloc(scnt * sizeof(*nb),GFP_KERNEL);
+
+			nb = kmalloc_array(scnt, sizeof(*nb), GFP_KERNEL);
 			if (!nb) return -ENOMEM;
 			if (sp->buffer_slot_count) {
 				memcpy(nb,sp->buffers,
-- 
2.11.0