ip6_output(): if mtu is not yet computed for ipsec hook, use ifp mtu

Sponsored by: NVidia networking
freebsd · Dec 16, 2024 · f870740 · f870740
1 parent 94e94d2
commit f870740
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c
@@ -798,7 +798,8 @@ ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
 			error = ENOBUFS;
 			goto bad;
 		}
-		if ((error = IPSEC_OUTPUT(ipv6, ifp, m, inp, mtu)) != 0) {
+		if ((error = IPSEC_OUTPUT(ipv6, ifp, m, inp, mtu == 0 ?
+		    ifp->if_mtu : mtu)) != 0) {
 			if (error == EINPROGRESS)
 				error = 0;
 			goto done;