Author: ae
Date: Wed Apr 1 02:13:01 2020
New Revision: 359498
URL: https://svnweb.freebsd.org/changeset/base/359498
Log:
Ignore ND6 neighbor advertisement received for static link-layer entries.
Previously such NA could override manually created LLE.
Reported by: Martin Beran <martin at mber cz>
Reviewed by: melifaro
MFC after: 10 days
Modified:
head/sys/netinet6/nd6_nbr.c
Modified: head/sys/netinet6/nd6_nbr.c
==============================================================================
--- head/sys/netinet6/nd6_nbr.c Tue Mar 31 22:41:57 2020 (r359497)
+++ head/sys/netinet6/nd6_nbr.c Wed Apr 1 02:13:01 2020 (r359498)
@@ -754,6 +754,12 @@ nd6_na_input(struct mbuf *m, int off, int icmp6len)
goto freeit;
}
+ /*
+ * Do not try to override static entry.
+ */
+ if (ln->la_flags & LLE_STATIC)
+ goto freeit;
+
if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
/*
* If the link-layer has address, and no lladdr option came,
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