Fatal trap 9: general protection fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff81158619 stack pointer = 0x28:0xfffffe001a1010e0 frame pointer = 0x28:0xfffffe001a1010f0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 1 (kernel) trap number = 9 panic: general protection fault cpuid = 0 time = 1 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001a100d80 vpanic() at vpanic+0x1ce/frame 0xfffffe001a100df0 panic() at panic+0x43/frame 0xfffffe001a100e50 trap_fatal() at trap_fatal+0x4cc/frame 0xfffffe001a100ed0 trap() at trap+0xe4/frame 0xfffffe001a101010 calltrap() at calltrap+0x8/frame 0xfffffe001a101010 --- trap 0x9, rip = 0xffffffff81158619, rsp = 0xfffffe001a1010e0, rbp = 0xfffffe001a1010f0 --- biotrack_buf() at biotrack_buf+0x19/frame 0xfffffe001a1010f0 g_io_deliver() at g_io_deliver+0x39/frame 0xfffffe001a101150 g_io_request() at g_io_request+0x57a/frame 0xfffffe001a1011a0 g_part_start() at g_part_start+0x223/frame 0xfffffe001a101240 g_io_request() at g_io_request+0x57a/frame 0xfffffe001a101290 g_io_request() at g_io_request+0x57a/frame 0xfffffe001a1012e0 g_io_getattr() at g_io_getattr+0x83/frame 0xfffffe001a101320 ffs_mount() at ffs_mount+0x2412/frame 0xfffffe001a1014e0 vfs_domount() at vfs_domount+0xc26/frame 0xfffffe001a101720 vfs_donmount() at vfs_donmount+0xc87/frame 0xfffffe001a1017d0 kernel_mount() at kernel_mount+0x92/frame 0xfffffe001a101830 parse_mount() at parse_mount+0x8ee/frame 0xfffffe001a101990 vfs_mountroot() at vfs_mountroot+0x5f4/frame 0xfffffe001a101b00 start_init() at start_init+0x2c/frame 0xfffffe001a101ba0 fork_exit() at fork_exit+0xac/frame 0xfffffe001a101bf0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe001a101bf0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 1 tid 100002 ] Stopped at kdb_enter+0x67: movq $0,0x14663e6(%rip) db>