linux-kernel - [PATCH 01/13] DRBD-receiver: Use kmalloc_array() in receive

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Message-ID: <52dd5e61-96c1-e309-7a43-20768b05dd24@users.sourceforge.net>
Date:   Sat, 10 Sep 2016 22:22:07 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     drbd-dev@...ts.linbit.com,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        Philipp Reisner <philipp.reisner@...bit.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 01/13] DRBD-receiver: Use kmalloc_array() in receive_uuids()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 10 Sep 2016 19:22:57 +0200

* 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.

* Replace the specification of a data type by a pointer dereference
  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/block/drbd/drbd_receiver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 942384f..3be9fbf 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -4186,7 +4186,7 @@ static int receive_uuids(struct drbd_connection *connection, struct packet_info
 		return config_unknown_volume(connection, pi);
 	device = peer_device->device;
 
-	p_uuid = kmalloc(sizeof(u64)*UI_EXTENDED_SIZE, GFP_NOIO);
+	p_uuid = kmalloc_array(UI_EXTENDED_SIZE, sizeof(*p_uuid), GFP_NOIO);
 	if (!p_uuid) {
 		drbd_err(device, "kmalloc of p_uuid failed\n");
 		return false;
-- 
2.10.0