media: usb: use kmalloc_array() to replace kmalloc()

Use kmalloc_array() to replace kmalloc() with multiplication.
kmalloc_array() has multiply overflow check, which will be safer.

Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

diff --git a/drivers/media/usb/dvb-usb/cxusb-analog.c b/drivers/media/usb/dvb-usb/cxusb-analog.c
index 8253046cd6e60195264387000789d4739fdffe51..3bbee1fcbc8dc3d7ef7b408333d4af1f16bb1d6d 100644 (file)
--- a/drivers/media/usb/dvb-usb/cxusb-analog.c
+++ b/drivers/media/usb/dvb-usb/cxusb-analog.c
@@ -817,8 +817,8 @@ static int cxusb_medion_v_start_streaming(struct vb2_queue *q,
                 * doing a large continuous allocation when (if)
                 * s-g isochronous USB transfers are supported
                 */
-               streambuf = kmalloc(npackets * CXUSB_VIDEO_PKT_SIZE,
-                                   GFP_KERNEL);
+               streambuf = kmalloc_array(npackets, CXUSB_VIDEO_PKT_SIZE,
+                                         GFP_KERNEL);
                if (!streambuf) {
                        if (i < 2) {
                                ret = -ENOMEM;