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CVS commit: src/sys/netinet6

Module Name:    src
Committed By:   roy
Date:           Wed Apr 22 19:32:11 UTC 2020

Modified Files:
        src/sys/netinet6: nd6_nbr.c

Log Message:
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 -r1.177 -r1.178 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.

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