Author: ae
Date: Sat Apr 11 09:35:48 2020
New Revision: 359802
URL: https://svnweb.freebsd.org/changeset/base/359802
Log:
MFC r359498:
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>
Modified:
stable/12/sys/netinet6/nd6_nbr.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/netinet6/nd6_nbr.c
==============================================================================
--- stable/12/sys/netinet6/nd6_nbr.c Sat Apr 11 08:16:35 2020
(r359801)
+++ stable/12/sys/netinet6/nd6_nbr.c Sat Apr 11 09:35:48 2020
(r359802)
@@ -753,6 +753,12 @@ 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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