Author: ae
Date: Mon Mar 18 09:21:30 2019
New Revision: 345256
URL: https://svnweb.freebsd.org/changeset/base/345256
Log:
MFC r345003:
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
Sponsored by: Yandex LLC
Modified:
stable/12/sys/netpfil/ipfw/nat64/nat64_translate.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/netpfil/ipfw/nat64/nat64_translate.c
==============================================================================
--- stable/12/sys/netpfil/ipfw/nat64/nat64_translate.c Mon Mar 18 05:03:55
2019 (r345255)
+++ stable/12/sys/netpfil/ipfw/nat64/nat64_translate.c Mon Mar 18 09:21:30
2019 (r345256)
@@ -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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