can: raw: raw_bind(): bail out if can_family is not AF_CAN

Until now CAN raw's bind() doesn't check if the can_familiy in the
struct sockaddr_can is set to AF_CAN. This patch adds the missing check.
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

net/can/raw.c

@@ -401,6 +401,8 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 
 	if (len < sizeof(*addr))
 		return -EINVAL;
+	if (addr->can_family != AF_CAN)
+		return -EINVAL;
 
 	lock_sock(sk);