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[media] usbtv: correctly handling failed allocation

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Since kzalloc can be failed,
if not properly handled, NULL dereference could be happened.

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>
This commit is contained in:
Insu Yun 2015-12-29 19:48:29 -02:00 committed by Mauro Carvalho Chehab
parent f8433226d1
commit e22a3b34a1
1 changed files with 4 additions and 0 deletions
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4
drivers/media/usb/usbtv/usbtv-video.c
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@ -393,6 +393,10 @@ static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
ip->transfer_flags = URB_ISO_ASAP;
ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS,
GFP_KERNEL);
if (!ip->transfer_buffer) {
usb_free_urb(ip);
return NULL;
}
ip->complete = usbtv_iso_cb;
ip->number_of_packets = USBTV_ISOC_PACKETS;
ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;