D20338.diff
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	Index: sys/netinet/udp_usrreq.c
	===================================================================
	--- sys/netinet/udp_usrreq.c
	+++ sys/netinet/udp_usrreq.c
	@@ -1156,9 +1156,15 @@

	src.sin_family = 0;
	sin = (struct sockaddr_in *)addr;
	+retry:
	if (sin == NULL \|\|
	(inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0)) {
	INP_WLOCK(inp);
	+ if (sin != NULL && (inp->inp_laddr.s_addr != INADDR_ANY \|\|
	+ inp->inp_lport != 0)) {
	+ INP_WUNLOCK(inp);
	+ goto retry;
	+ }
	unlock_inp = UH_WLOCKED;
	} else {
	INP_RLOCK(inp);