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kern/48853: panic on amd64/current

>Number:         48853
>Category:       kern
>Synopsis:       panic on amd64/current
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 30 15:10:00 +0000 2014
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.43
The NetBSD Foundation, Inc.
System: NetBSD 6.99.43 NetBSD 6.99.43 (NIGHT-OWL) #256: 
Mon May 26 09:45:23 CEST 2014
Architecture: x86_64
Machine: amd64
My machine paniced. I have netbsd.gdb and a crash dump.

(gdb) p panicstr
$1 = 0xffffffff80de6c80 <scratchstr.10918> "trap"
(gdb) bt
#0  0xffffffff804ad075 in cpu_reboot (howto=howto@entry=260, 
    bootstr=bootstr@entry=0x0) at ../../../../arch/amd64/amd64/machdep.c:671
#1  0xffffffff80688e34 in vpanic (fmt=fmt@entry=0xffffffff80ab81dd "trap", 
    ap=ap@entry=0xfffffe80bf73ed10) at ../../../../kern/subr_prf.c:284
#2  0xffffffff80688eef in panic (fmt=fmt@entry=0xffffffff80ab81dd "trap")
    at ../../../../kern/subr_prf.c:200
#3  0xffffffff806d0acf in trap (frame=0xfffffe80bf73ee30)
    at ../../../../arch/amd64/amd64/trap.c:298
#4  0xffffffff80100fde in alltraps ()
#5  0xffffffff8047aca9 in rnd_process_events ()
    at ../../../../kern/kern_rndq.c:858
#6  0xffffffff8048376b in softint_execute (l=<optimized out>, s=5, 
    si=0xffff800045d63178) at ../../../../kern/kern_softint.c:589
#7  softint_dispatch (pinned=<optimized out>, s=5)
    at ../../../../kern/kern_softint.c:871
#8  0xffffffff8011412f in Xsoftintr ()

... and then gdb dumps core in get_frame_id().

No idea, machine was mostly idle and I was typing in an editor on a different
machine via ssh.


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