Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address	= 0x30030000
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff81bcbabd
stack pointer	        = 0x28:0xffffffff84d22ba0
frame pointer	        = 0x28:0xffffffff84d22cc0
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		= 0 (swapper)
rdi:         30030000 rsi:                0 rdx:                0
rcx: fffffe00033eee30  r8: fffff78000000000  r9:      20000000000
rax: fffffe00033eee30 rbx: ffffffff83dc7bf8 rbp: ffffffff84d22cc0
r10:                0 r11:         fe7ef5e7 r12: fffffe005791ac00
r13:          3ffffff r14:         10030000 r15: 1ffffffff09a457c
trap number		= 12
panic: page fault
cpuid = 1
time = 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xffffffff84d22390
kdb_backtrace() at kdb_backtrace+0xd1/frame 0xffffffff84d224f0
vpanic() at vpanic+0x254/frame 0xffffffff84d225d0
panic() at panic+0xb5/frame 0xffffffff84d22690
trap_fatal() at trap_fatal+0x7ed/frame 0xffffffff84d227b0
trap_pfault() at trap_pfault+0x182/frame 0xffffffff84d228f0
trap() at trap+0x5e1/frame 0xffffffff84d22ad0
calltrap() at calltrap+0x8/frame 0xffffffff84d22ad0
--- trap 0xc, rip = 0xffffffff81bcbabd, rsp = 0xffffffff84d22ba0, rbp = 0xffffffff84d22cc0 ---
nl_send_group() at nl_send_group+0x19d/frame 0xffffffff84d22cc0
nlmsg_write_group_mbuf() at nlmsg_write_group_mbuf+0xbb/frame 0xffffffff84d22d00
nlmsg_flush() at nlmsg_flush+0xba/frame 0xffffffff84d22d50
genl_register_family() at genl_register_family+0x5d0/frame 0xffffffff84d22e90
genl_load() at genl_load+0x89/frame 0xffffffff84d22eb0
mi_startup() at mi_startup+0x4c6/frame 0xffffffff84d22ff0
btext() at btext+0x3d
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x258104a(%rip)
db>