From f8433226d1b3eb035693724dca786c4445221368 Mon Sep 17 00:00:00 2001
From: Insu Yun <wuninsu@gmail.com>
Date: Tue, 29 Dec 2015 16:53:35 -0200
Subject: [PATCH] [media] cx231xx: correctly handling failed allocation

Since kmalloc can be failed in memory pressure,
if not properly handled, NULL dereference can be happend

Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---
 drivers/media/usb/cx231xx/cx231xx-417.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/usb/cx231xx/cx231xx-417.c b/drivers/media/usb/cx231xx/cx231xx-417.c
index 48643b94e694..c9320d6c6131 100644
--- a/drivers/media/usb/cx231xx/cx231xx-417.c
+++ b/drivers/media/usb/cx231xx/cx231xx-417.c
@@ -1382,6 +1382,8 @@ static int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb)
 	buffer_size = urb->actual_length;
 
 	buffer = kmalloc(buffer_size, GFP_ATOMIC);
+	if (!buffer)
+		return -ENOMEM;
 
 	memcpy(buffer, dma_q->ps_head, 3);
 	memcpy(buffer+3, p_buffer, buffer_size-3);