blockable sleep lock (sleep mutex) netgraph nodelist mutex panic

[Ruslan Ermilov]

5.2-CURRENT.  Connecting a Netgraph node to itself results in the
following panic on the node shutdown:

: blockable sleep lock (sleep mutex) netgraph nodelist mutex @ /usr/src/sys/netgraph/ng_base.c:952

To reproduce, just type: ``ngctl connect . . foo bar''.  This will
panic instantly.


Cheers,
-- 
Ruslan Ermilov
FreeBSD committer
ru at FreeBSD.org
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