freebsd stable - Mar 2006 - Fatal trap 12: page fault while in kernel mode tc_windup()

After a cvsup to RELENG_6 today I got the following trap while 
encoding some videos with Avidemux.  I'm going to leave the machine 
at the ddb prompt since the following trace information doesn't seem 
very helpful.  

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xffffffbb80551f10
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xffffffff802371c4
stack pointer           = 0x10:0xffffffff9634bb90
frame pointer           = 0x10:0xffffffff9634bbf0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 19381 (avidemux2)
[thread pid 19381 tid 100115 ]
Stopped at      tc_windup+0x24: movl    0x50(%r13),%eax
db> 
db> bt
Tracing pid 19381 tid 100115 td 0xffffff001cb0b980
tc_windup() at tc_windup+0x24
hardclock() at hardclock+0x17
lapic_handle_timer() at lapic_handle_timer+0x11c
Xtimerint() at Xtimerint+0x76

-- 
Anish Mistry
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