linux-kernel - [PATCH 1/3] [media] au0828-video: Use kcalloc() in au0828_init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <68ad1aaa-c029-04b9-805a-e859f6c2d2d5@users.sourceforge.net>
Date:   Mon, 24 Oct 2016 22:59:24 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org, Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rafael Lourenço de Lima Chehab 
        <chehabrafael@...il.com>, Shuah Khan <shuah@...nel.org>,
        Wolfram Sang <wsa-dev@...g-engineering.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/3] [media] au0828-video: Use kcalloc() in au0828_init_isoc()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 24 Oct 2016 22:08:47 +0200

* Multiplications for the size determination of memory allocations
  indicated that array data structures should be processed.
  Thus use the corresponding function "kcalloc".

  This issue was detected by using the Coccinelle software.

* Replace the specification of data types by pointer dereferences
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/usb/au0828/au0828-video.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
index 85dd9a8..85b13c1 100644
--- a/drivers/media/usb/au0828/au0828-video.c
+++ b/drivers/media/usb/au0828/au0828-video.c
@@ -221,15 +221,18 @@ static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
 
 	dev->isoc_ctl.isoc_copy = isoc_copy;
 	dev->isoc_ctl.num_bufs = num_bufs;
-
-	dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs,  GFP_KERNEL);
+	dev->isoc_ctl.urb = kcalloc(num_bufs,
+				    sizeof(*dev->isoc_ctl.urb),
+				    GFP_KERNEL);
 	if (!dev->isoc_ctl.urb) {
 		au0828_isocdbg("cannot alloc memory for usb buffers\n");
 		return -ENOMEM;
 	}
 
-	dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
-					      GFP_KERNEL);
+	dev->isoc_ctl.transfer_buffer = kcalloc(num_bufs,
+						sizeof(*dev->isoc_ctl
+						       .transfer_buffer),
+						GFP_KERNEL);
 	if (!dev->isoc_ctl.transfer_buffer) {
 		au0828_isocdbg("cannot allocate memory for usb transfer\n");
 		kfree(dev->isoc_ctl.urb);
-- 
2.10.1