src/event/ngx_event_udp.c:233: error: Integer Overflow L2
  ([0, +oo] - 2):unsigned64 by call to `ngx_lookup_udp_connection`.

src/event/ngx_event_udp.c:117:13: Unknown value from: recvmsg
115. #endif
116. 
117.         n = recvmsg(lc->fd, &msg, 0);
                 ^
118. 
119.         if (n == -1) {

src/event/ngx_event_udp.c:161:9: Assignment
159. 
160.         local_sockaddr = ls->sockaddr;
161.         local_socklen = ls->socklen;
             ^
162. 
163. #if (NGX_HAVE_MSGHDR_MSG_CONTROL)

src/event/ngx_event_udp.c:233:13: Call
231. #endif
232. 
233.         c = ngx_lookup_udp_connection(ls, sockaddr, socklen, local_sockaddr,
                 ^
234.                                       local_socklen);
235. 

src/event/ngx_event_udp.c:567:1: Parameter `local_socklen`
  565. 
  566. 
  567. static ngx_connection_t *
       ^
  568. ngx_lookup_udp_connection(ngx_listening_t *ls, struct sockaddr *sockaddr,
  569.     socklen_t socklen, struct sockaddr *local_sockaddr, socklen_t local_socklen)

src/event/ngx_event_udp.c:627:18: Call
  625. 
  626.         if (rc == 0 && ls->wildcard) {
  627.             rc = ngx_cmp_sockaddr(local_sockaddr, local_socklen,
                        ^
  628.                                   c->local_sockaddr, c->local_socklen, 1);
  629.         }

src/core/ngx_inet.c:1362:1: <LHS trace>
1360. 
1361. 
1362. ngx_int_t
      ^
1363. ngx_cmp_sockaddr(struct sockaddr *sa1, socklen_t slen1,
1364.     struct sockaddr *sa2, socklen_t slen2, ngx_uint_t cmp_port)

src/core/ngx_inet.c:1362:1: Parameter `slen2`
    1360. 
    1361. 
    1362. ngx_int_t
          ^
    1363. ngx_cmp_sockaddr(struct sockaddr *sa1, socklen_t slen1,
    1364.     struct sockaddr *sa2, socklen_t slen2, ngx_uint_t cmp_port)

src/core/ngx_inet.c:1405:13: Binary operation: ([0, +oo] - 2):unsigned64 by call to `ngx_lookup_udp_connection` 
    1403. 
    1404.         if (slen1 < slen2) {
    1405.             len = slen1 - offsetof(struct sockaddr_un, sun_path);
                      ^
    1406. 
    1407.         } else {
