bridge: Add missing ntohs()s for MLDv2 report parsing

The nsrcs number is 2 Byte wide, therefore we need to call ntohs()
before using it.
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_multicast.c

@@ -1020,11 +1020,12 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
 
 		if (!pskb_may_pull(skb,
 				   len + sizeof(*grec) +
-				   sizeof(struct in6_addr) * (*nsrcs)))
+				   sizeof(struct in6_addr) * ntohs(*nsrcs)))
 			return -EINVAL;
 
 		grec = (struct mld2_grec *)(skb->data + len);
-		len += sizeof(*grec) + sizeof(struct in6_addr) * (*nsrcs);
+		len += sizeof(*grec) +
+		       sizeof(struct in6_addr) * ntohs(*nsrcs);
 
 		/* We treat these as MLDv1 reports for now. */
 		switch (grec->grec_type) {