kern/182750: FreeBSD 9.2: panic: page fault

[David Naylor]

>Number:         182750
>Category:       kern
>Synopsis:       FreeBSD 9.2: panic: page fault
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 06 16:10:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     David Naylor
>Release:        FreeBSD 9.2 #0 (from source)
>Organization:
FreeBSD
>Environment:
FreeBSD ultra.dg 9.2-RELEASE FreeBSD 9.2-RELEASE #0 r+05c3e78: Mon Sep 30 19:30:57 SAST 2013
     root at dragon.dg:/tmp/home/freebsd/9.2/src/sys/MODULAR  amd64
>Description:
Sometimes the kernel panics when a new program is launched.  This is more frequent when using a graphical environment although does occur on occasion when using just a console.  

This panic started somewhere between FreeBSD 9.1 and 9.2 (while tracking stable/9).  Occurring at least at revision 24c4fd7 and d42e7f7 (using the git revision number from github.com/freebsd.  

I have 9 core dumps from this crash, six from the earlier revision (24c4fd7), one from the other revision (d42e7f7) and two from the current revision (05c3e78).  See http://people.freebsd.org/~dbn/crash/core.txt.7 for the latest crash log (additional logs available upon request).  
>How-To-Repeat:
Sporadic with no set procedure to trigger except using FreeBSD (triggers on program launch).  
>Fix:


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