usb: iowarrior: replace kmalloc with kmalloc_array

A common flaw in the kernel is integer overflow during memory allocation
size calculations. In an effort to reduce the frequency of these bugs,
kmalloc_array was implemented, which allocates memory for an array,
while at the same time detects integer overflow.

This patch replaces cases of:

kmalloc(a * b, gfp)

with:
kmalloc_array(a, b, gfp)

Reviewed-by: Kees Cook <[e-mail]>
Signed-off-by: Gustavo A. R. Silva <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/misc/iowarrior.c

···
 			 dev->int_in_endpoint->bInterval);
 	/* create an internal buffer for interrupt data from the device */
 	dev->read_queue =
-	    kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER),
-		    GFP_KERNEL);
+	    kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER,
+			  GFP_KERNEL);
 	if (!dev->read_queue)
 		goto error;
 	/* Get the serial-number of the chip */