CVS commit: [netbsd-9] src/sys/netinet6

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Thu Apr 23 13:31:43 UTC 2020

Modified Files:
        src/sys/netinet6 [netbsd-9]: nd6_nbr.c

Log Message:
Pull up following revision(s) (requested by roy in ticket #845):

        sys/netinet6/nd6_nbr.c: revision 1.178

inet6: nd6_na_input() now considers ln_state <= ND6_LLINFO_INCOMPLETE

Otherwise if ln_state != ND6_LLINFO_INCOMPLETE and the is no lladdr
and this message was solicited then ln_state is set to ND6_LLINFO_REACHABLE
which could then cause a panic in nd6_resolve().

If ln_state > ND6_LLINFO_INCOMPLETE then it's assumed we have a lladdr.
Potentially this could have been triggered by the introduction of
ND6_LLINFO_PURGE in nd6.c r1.143 but also by the re-introduction of
ND6_LLINFO_INCOMPLETE in nd6.c r1.263.

Depending on the timing, it's technically possible to receive such
a message after the llentry is created with ND6_LLINFO_NOSTATE.


To generate a diff of this commit:
cvs rdiff -u -r1.166.2.4 -r1.166.2.5 src/sys/netinet6/nd6_nbr.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.