>Number:         14580
>Category:       kern
>Synopsis:       panic in i386 netbsd-1-5, pmap_unwire: invalid (unmapped) va
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Nov 13 16:25:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Jesse Off
>Release:        NetBSD 1.5.3
>Organization:
	NewMonics, Inc.
>Environment:
System: NetBSD vast 1.5.3_ALPHA NetBSD 1.5.3_ALPHA (VAST) #0: Wed Oct 31 11:13:10 MST 2001 joff@vast:/u/src/sys/arch/i386/compile/VAST i386


>Description:
while do a /sbin/restore of /usr, I got this panic when the restore was restoring files in /usr/lib.
The backtrace (transcribed by hand), looks somewhat like this:
panic()
pmap_unwire()
uvm_fault_unwire_locked()
uvm_unmap_remove()
uvm_unmap()
uvm_deallocate()
exit1()
sigexit()
postsig(b)
trap()
--- trap number 6 ----

The panic happened in the ntpd process. (the restore was in preempt())
>How-To-Repeat:
	You could try to do an overwriting restore of /usr from a backup with ntpd running.
>Fix:
	Unknown
>Release-Note:
>Audit-Trail:
>Unformatted: