kern/154676: HEAD, 8.1-RELEASE panic after some play with netgraph

[Sergey V. Dyatko]

>Number:         154676
>Category:       kern
>Synopsis:       HEAD, 8.1-RELEASE panic after some play with netgraph
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Feb 11 09:20:07 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Sergey V. Dyatko
>Release:        8.1-RELEASE-p2, HEAD i386 r217701
>Organization:
>Environment:
FreeBSD laptop.minsk.domain 9.0-CURRENT FreeBSD 9.0-CURRENT #20 r217701M: Fri Jan 21 23:49:33 EET 2011     root at laptop.minsk.domain:/usr/obj/usr/src/sys/b450  i386

>Description:
http://tiger.ipfw.ru/tmp/core.txt
>How-To-Repeat:
host# sockstat -l4 -p 25
USER     COMMAND    PID   FD PROTO  LOCAL ADDRESS         FOREIGN ADDRESS      
root     sendmail   1171  3  tcp4   127.0.0.1:25          *:*

host# ngctl

mkpeer ksocket myhook2 inet/stream/tcp
msg .:myhook2 connect inet/127.0.0.1:25

result from FreeBSD 7.0-RELEASE-p5 amd64: http://paste.org.ru/?imirnx
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: