Author: ae
Date: Mon Mar 11 10:33:32 2019
New Revision: 345003
URL: https://svnweb.freebsd.org/changeset/base/345003
Log:
Add NULL pointer check to nat64_output().
It is possible, that a processed packet was originated by local host,
in this case m->m_pkthdr.rcvif is NULL. Check and set it to V_loif to
avoid NULL pointer dereference in IP input code, since it is expected
that packet has valid receiving interface when netisr processes it.
Obtained from: Yandex LLC
MFC after: 1 week
Sponsored by: Yandex LLC
Modified:
head/sys/netpfil/ipfw/nat64/nat64_translate.c
Modified: head/sys/netpfil/ipfw/nat64/nat64_translate.c
==============================================================================
--- head/sys/netpfil/ipfw/nat64/nat64_translate.c Mon Mar 11 08:30:29
2019 (r345002)
+++ head/sys/netpfil/ipfw/nat64/nat64_translate.c Mon Mar 11 10:33:32
2019 (r345003)
@@ -219,6 +219,8 @@ nat64_output(struct ifnet *ifp, struct mbuf *m, struct
}
if (logdata != NULL)
nat64_log(logdata, m, af);
+ if (m->m_pkthdr.rcvif == NULL)
+ m->m_pkthdr.rcvif = V_loif;
ret = netisr_queue(ret, m);
if (ret != 0)
NAT64STAT_INC(stats, oerrors);
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