Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 05
fault virtual address   = 0x0
fault code              = supervisor read instruction, page not present
instruction pointer     = 0x20:0x0
stack pointer           = 0x28:0xfffffe022fef47c0
frame pointer           = 0x28:0xfffffe0009aabfe8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 3
current process         = 944 (Xorg)
trap number             = 12
panic: page fault
cpuid = 3
KDB: stack backtrace:
#0 0xffffffff80966020 at kdb_backtrace+0x60
#1 0xffffffff8092a785 at panic+0x155
#2 0xffffffff80d299af at trap_fatal+0x38f
#3 0xffffffff80d29cc8 at trap_pfault+0x308
#4 0xffffffff80d2932a at trap+0x47a
#5 0xffffffff80d0f042 at calltrap+0x8
Uptime: 14m39s
Dumping 509 out of 8010 MB:..4%..13%..22%..32%..41%..51%..63%..73%..82%..92%

Reading symbols from /boot/kernel/zfs.ko.symbols...done.
Loaded symbols for /boot/kernel/zfs.ko.symbols
Reading symbols from /boot/kernel/opensolaris.ko.symbols...done.
Loaded symbols for /boot/kernel/opensolaris.ko.symbols
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/linux.ko.symbols...done.
Loaded symbols for /boot/kernel/linux.ko.symbols
Reading symbols from /boot/modules/vboxdrv.ko...done.
Loaded symbols for /boot/modules/vboxdrv.ko
Reading symbols from /boot/modules/cuse4bsd.ko...done.
Loaded symbols for /boot/modules/cuse4bsd.ko
Reading symbols from /boot/kernel/fdescfs.ko.symbols...done.
Loaded symbols for /boot/kernel/fdescfs.ko.symbols
Reading symbols from /boot/kernel/pflog.ko.symbols...done.
Loaded symbols for /boot/kernel/pflog.ko.symbols
Reading symbols from /boot/kernel/pf.ko.symbols...done.
Loaded symbols for /boot/kernel/pf.ko.symbols
Reading symbols from /boot/modules/vboxnetflt.ko...done.
Loaded symbols for /boot/modules/vboxnetflt.ko
Reading symbols from /boot/kernel/netgraph.ko.symbols...done.
Loaded symbols for /boot/kernel/netgraph.ko.symbols
Reading symbols from /boot/kernel/ng_ether.ko.symbols...done.
Loaded symbols for /boot/kernel/ng_ether.ko.symbols
Reading symbols from /boot/modules/vboxnetadp.ko...done.
Loaded symbols for /boot/modules/vboxnetadp.ko
#0  doadump (textdump=<value optimized out>) at pcpu.h:219
219             __asm("movq %%gs:%1,%0" : "=r" (td)
(kgdb) where
#0  doadump (textdump=<value optimized out>) at pcpu.h:219
#1  0xffffffff8092a402 in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:452
#2  0xffffffff8092a7c4 in panic (fmt=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:759
#3  0xffffffff80d299af in trap_fatal (frame=<value optimized out>, eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:865
#4  0xffffffff80d29cc8 in trap_pfault (frame=0xfffffe022fef4710, usermode=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:676
#5  0xffffffff80d2932a in trap (frame=0xfffffe022fef4710) at /usr/src/sys/amd64/amd64/trap.c:440
#6  0xffffffff80d0f042 in calltrap () at /usr/src/sys/amd64/amd64/exception.S:232
#7  0x0000000000000000 in ?? ()
Current language:  auto; currently minimal
(kgdb)