VFS panic - probably NTFS

I have a dual boot system, and from time to time I use mount_ntfs to read 
stuff from the windows partition. Doing that today I got the following 
with a system built on 23 December:

#0  doadump () at pcpu.h:195
195	pcpu.h: No such file or directory.
 	in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:195
#1  0xc056a0ae in boot (howto=260)
     at /usr/local/src/sys/kern/kern_shutdown.c:409
#2  0xc056a36b in panic (fmt=Variable "fmt" is not available.
) at /usr/local/src/sys/kern/kern_shutdown.c:563
#3  0xc05586a2 in _lockmgr (lkp=0xc90049e8, flags=8212, 
interlkp=0xc9004a18,
     td=0xc92d5220, file=0xc077c0ed "/usr/local/src/sys/kern/vfs_subr.c",
     line=2213) at /usr/local/src/sys/kern/kern_lock.c:319
#4  0xc05d9090 in vop_stdlock (ap=0xea0f6a34)
     at /usr/local/src/sys/kern/vfs_default.c:266
#5  0xc07395b5 in VOP_LOCK1_APV (vop=0xc07c4900, a=0xea0f6a34)
     at vnode_if.c:1618
#6  0xc05e78f3 in vput (vp=0xc9004990) at vnode_if.h:851
#7  0xc05dcc8c in lookup (ndp=0xea0f6ba8)
     at /usr/local/src/sys/kern/vfs_lookup.c:759
#8  0xc05dd1ab in namei (ndp=0xea0f6ba8)
     at /usr/local/src/sys/kern/vfs_lookup.c:219
#9  0xc05ea13d in kern_stat (td=0xc92d5220,
     path=0x28202400 <Address 0x28202400 out of bounds>, 
pathseg=UIO_USERSPACE,
     sbp=0xea0f6c18) at /usr/local/src/sys/kern/vfs_syscalls.c:2109
#10 0xc05ea2cf in stat (td=0xc92d5220, uap=0xea0f6cfc)
     at /usr/local/src/sys/kern/vfs_syscalls.c:2093
#11 0xc072acb3 in syscall (frame=0xea0f6d38)
     at /usr/local/src/sys/i386/i386/trap.c:1034
#12 0xc0712130 in Xint0x80_syscall ()
     at /usr/local/src/sys/i386/i386/exception.s:203
#13 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)


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