diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c
--- a/sys/netinet/in_pcb.c
+++ b/sys/netinet/in_pcb.c
@@ -435,7 +435,7 @@
 		    inp->inp_lport, &inp->inp_inc.inc_ie.ie_dependladdr,
 		    INPCBLBGROUP_SIZMIN, numa_domain, fib);
 		if (grp == NULL)
-			return (ENOBUFS);
+			return (ENOMEM);
 		in_pcblbgroup_insert(grp, inp);
 		CK_LIST_INSERT_HEAD(hdr, grp, il_list);
 	} else if (grp->il_inpcnt + grp->il_pendcnt == grp->il_inpsiz) {
@@ -449,7 +449,7 @@
 		/* Expand this local group. */
 		grp = in_pcblbgroup_resize(hdr, grp, grp->il_inpsiz * 2);
 		if (grp == NULL)
-			return (ENOBUFS);
+			return (ENOMEM);
 		in_pcblbgroup_insert(grp, inp);
 	} else {
 		in_pcblbgroup_insert(grp, inp);
@@ -732,11 +732,12 @@
 	    &inp->inp_lport, flags, cred);
 	if (error)
 		return (error);
-	if (in_pcbinshash(inp) != 0) {
+	if (__predict_false((error = in_pcbinshash(inp)) != 0)) {
+		MPASS(inp->inp_socket->so_options & SO_REUSEPORT_LB);
 		inp->inp_laddr.s_addr = INADDR_ANY;
 		inp->inp_lport = 0;
 		inp->inp_flags &= ~INP_BOUNDFIB;
-		return (EAGAIN);
+		return (error);
 	}
 	if (anonport)
 		inp->inp_flags |= INP_ANONPORT;