sparc64/118932: 7.0-BETA4/sparc-64 kernel panic in rip_output

>Number:         118932
>Category:       sparc64
>Synopsis:       7.0-BETA4/sparc-64 kernel panic in
rip_output
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-sparc64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 21 15:30:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     Alex Bakhtin
>Release:        7.0-BETA4
>Organization:
AMT Group
>Environment:
> uname -a
FreeBSD amtkit-ey.lab.amt.ru 7.0-BETA4 FreeBSD 7.0-BETA4 #0:
Fri Dec 21 11:40:30 UTC 2007     bakhtinamtkit-ey.lab.amt.ru:/mnt/data/obj/usr/src/sys/DEBUG 
sparc64
>

>Description:
Kernel panic 'memory address not aligned' if some pptp
traffic goes through mpd/netgraph interface.

Dec 21 15:11:37 amtkit-ey su: bakhtin to root on /dev/ttyp0
panic: trap: memory address not aligned
cpuid = 0
KDB: enter: panic
[thread pid 14 tid 100002 ]
Stopped at      kdb_enter+0x68: ta              %xcc, 1
db> bt
Tracing pid 14 tid 100002 td 0xfffff800010816c0
panic() at panic+0x204
trap() at trap+0x4cc
-- memory address not aligned sfar=0xfffff800012178de
sfsr=0x4002d %o7=0xc0391e3c --
rip_output() at rip_output+0x1a4
rip_send() at rip_send+0x4c
sosend_generic() at sosend_generic+0x5e4
sosend() at sosend+0x2c
ng_ksocket_rcvdata() at ng_ksocket_rcvdata+0xb8
ng_apply_item() at ng_apply_item+0x1b8
ngintr() at ngintr+0x190
swi_net() at swi_net+0x148
ithread_loop() at ithread_loop+0x1c4
fork_exit() at fork_exit+0x88
fork_trampoline() at fork_trampoline+0x8
db>

Have full core.

hw is SUN Netra T1.

>How-To-Repeat:
Install 7.0-BETA4 from src to clean disk (never tried to
reproduce this from binary-install, but I don't think that
something would change). Install mpd from ports, configure
it to use pptp interface with default route to it, connect
mpd to pptp server (i'm using 6.2STABLE i386 with mpd
also).

The same configuration worked on 6.2-STABLE on the same HW
without problems.

>Fix:
none

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