Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 06
fault virtual address	= 0x10
fault code		= supervisor write, page not present
instruction pointer	= 0x20:0xc070471a
stack pointer	        = 0x28:0xe9b4071c
frame pointer	        = 0x28:0xe9b40740
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 3340 (sh)
[ thread pid 3340 tid 100142 ]
Stopped at      insmntque1+0x1a:        lock cmpxchgl   %edx,0x10(%ebx)
db> [-- erwin@localhost attached -- Thu Dec 16 00:27:41 2010]
bt
Tracing pid 3340 tid 100142 td 0xc5c8e5a0
insmntque1(c7f35220,0,c05f95d0,c5228440,1e,...) at insmntque1+0x1a
null_nodeget(0,c658aaa0,e9b407a4,8000,c7228aa0,...) at null_nodeget+0x1de
null_lookup(e9b4081c,e9b407cc,80000,e9b40ac8,e9b4083c,...) at null_lookup+0xfb
VOP_LOOKUP_APV(c0a1c780,e9b4081c,c09d90ce,1f5,c065f843,...) at VOP_LOOKUP_APV+0x46
lookup(e9b40a9c,c50e1400,400,e9b40abc,e9b408ec,...) at lookup+0x65e
namei(e9b40a9c,e9b40af0,200100,0,1,...) at namei+0x64b
vn_open_cred(e9b40a9c,e9b40b28,0,1,c5cfe680,...) at vn_open_cred+0x33b
vop_stdvptocnp(e9b40bb8,e9b40b70,0,200400,e9b40bd0,...) at vop_stdvptocnp+0x15d
null_vptocnp(e9b40bb8,e9b40be0,c06f3084,c0a1c780,e9b40bb8,...) at null_vptocnp+0x2e
VOP_VPTOCNP_APV(c0a1c780,e9b40bb8,c09d8851,45c,1b,...) at VOP_VPTOCNP_APV+0x47
vn_vptocnp_locked(e9b40c14,0,0,c7228aa0,c5d10bb0,...) at vn_vptocnp_locked+0x194
vn_fullpath1(c5091000,e9b40c28,3ff,2,0,...) at vn_fullpath1+0x148
kern___getcwd(c5c8e5a0,bfbfe338,0,400,e9b40c7c,...) at kern___getcwd+0x102
__getcwd(c5c8e5a0,e9b40cec,e9b40d28,e9b40d80,48162b80,...) at __getcwd+0x29
syscallenter(c5c8e5a0,e9b40ce4,e9b40ce4,0,c5c8e5a0,...) at syscallenter+0x358
syscall(e9b40d28) at syscall+0x34
Xint0x80_syscall() at Xint0x80_syscall+0x21
--- syscall (326, FreeBSD ELF32, __getcwd), eip = 0x4814f4eb, esp = 0xbfbfe18c, ebp = 0xbfbfe248 ---