Author: glebius
Date: Fri May 10 21:51:17 2019
New Revision: 347466
URL: https://svnweb.freebsd.org/changeset/base/347466
Log:
Fix regression from r347375: do not panic when sending an IP multicast
packet from an interface that doesn't have IPv4 address.
Reported by: Michael Butler <imb protected-networks.net>
Modified:
head/sys/netinet/ip_output.c
Modified: head/sys/netinet/ip_output.c
==============================================================================
--- head/sys/netinet/ip_output.c Fri May 10 20:15:40 2019
(r347465)
+++ head/sys/netinet/ip_output.c Fri May 10 21:51:17 2019
(r347466)
@@ -361,7 +361,11 @@ again:
mtu = ifp->if_mtu;
IFP_TO_IA(ifp, ia, &in_ifa_tracker);
isbroadcast = 0; /* fool gcc */
- src = IA_SIN(ia)->sin_addr;
+ /* Interface may have no addresses. */
+ if (ia != NULL)
+ src = IA_SIN(ia)->sin_addr;
+ else
+ src.s_addr = INADDR_ANY;
} else if (ro != NULL) {
if (ro->ro_rt == NULL) {
/*
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