error message and system rebooted automatically

[Imran Imtiaz]

I got the following error and  my computer rebooted automatically what can be the problem for this? below is what log show

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x50074
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc05fe788
stack pointer           = 0x10:0xe71f48d8
frame pointer           = 0x10:0xe71f4998
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         = 40994 (sshd)
trap number             = 12
panic: page fault
Uptime: 5d16h47m17s
Cannot dump. No dump device defined.
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...

regards,
Imran Imtiaz