Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x18 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff81298297 stack pointer = 0x0:0xfffffe0016b2e8c0 frame pointer = 0x0:0xfffffe0016b2e900 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 (softirq_0) trap number = 12 panic: page fault cpuid = 0 time = 95 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016b2e520 vpanic() at vpanic+0x1e0/frame 0xfffffe0016b2e580 panic() at panic+0x43/frame 0xfffffe0016b2e5e0 trap_fatal() at trap_fatal+0x4de/frame 0xfffffe0016b2e660 trap_pfault() at trap_pfault+0x9f/frame 0xfffffe0016b2e6d0 trap() at trap+0x44d/frame 0xfffffe0016b2e7f0 calltrap() at calltrap+0x8/frame 0xfffffe0016b2e7f0 --- trap 0xc, rip = 0xffffffff81298297, rsp = 0xfffffe0016b2e8c0, rbp = 0xfffffe0016b2e900 --- inp_freemoptions() at inp_freemoptions+0x177/frame 0xfffffe0016b2e900 in_pcbfree_deferred() at in_pcbfree_deferred+0x2a9/frame 0xfffffe0016b2e960 epoch_call_task() at epoch_call_task+0x262/frame 0xfffffe0016b2e9c0 gtaskqueue_run_locked() at gtaskqueue_run_locked+0x13e/frame 0xfffffe0016b2ea20 gtaskqueue_thread_loop() at gtaskqueue_thread_loop+0xdd/frame 0xfffffe0016b2ea60 fork_exit() at fork_exit+0xb0/frame 0xfffffe0016b2eab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016b2eab0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 0 tid 100015 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why