[Coverity CID :198866]Null pointer dereferences in /subsys/net/lib/dns/llmnr_responder.c

[aasthagr]

Static code scan issues seen in File: /subsys/net/lib/dns/llmnr_responder.c
Category: Null pointer dereferences
Function: create_ipv6_dst_addr
Component: Networking
CID: 198866
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[aasthagr]

*** CID 198866:  Null pointer dereferences  (NULL_RETURNS)
/subsys/net/lib/dns/llmnr_responder.c: 73 in create_ipv6_dst_addr()
67     {
68     	struct net_udp_hdr *udp_hdr, hdr;
69     
70     	udp_hdr = net_udp_get_hdr(pkt, &hdr);
71     
72     	addr->sin6_family = AF_INET6;
>>>     CID 198866:  Null pointer dereferences  (NULL_RETURNS)
>>>     Dereferencing a null pointer "udp_hdr".
73     	addr->sin6_port = udp_hdr->src_port;
74     
75     	net_ipaddr_copy(&addr->sin6_addr, &NET_IPV6_HDR(pkt)->src);
76     }
77     #endif
78