--- zzzz-none-000/linux-4.19.183/net/ipv4/route.c	2021-03-24 10:07:39.000000000 +0000
+++ bcm63-7530ax-756/linux-4.19.183/net/ipv4/route.c	2023-06-28 08:54:21.000000000 +0000
@@ -1661,7 +1661,14 @@
 		return -EINVAL;
 
 	if (ipv4_is_zeronet(saddr)) {
+#if defined(CONFIG_BCM_KF_MISC_BACKPORTS)
+		/* Backporting latest kernel fix(1d2f4ebbbeb1ec055dcd3cf3dba833cfd0a84f3a)
+			to allow IGMP packets with zero source IP */		
+		if (!ipv4_is_local_multicast(daddr) &&
+			ip_hdr(skb)->protocol != IPPROTO_IGMP)
+#else
 		if (!ipv4_is_local_multicast(daddr))
+#endif
 			return -EINVAL;
 	} else {
 		err = fib_validate_source(skb, saddr, 0, tos, 0, dev,