Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x10 fault code = supervisor read data , page not present instruction pointer = 0x20:0xffffffff813e0139 stack pointer = 0x28:0xfffffe0016ad4710 frame pointer = 0x28:0xfffffe0016ad4770 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 = 12 (swi1: netisr 0) trap number = 12 panic: page fault cpuid = 1 time = 4 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0016ad4370 vpanic() at vpanic+0x1e0/frame 0xfffffe0016ad43d0 panic() at panic+0x43/frame 0xfffffe0016ad4430 trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe0016ad44b0 trap_pfault() at trap_pfault+0x9f/frame 0xfffffe0016ad4520 trap() at trap+0x44d/frame 0xfffffe0016ad4640 calltrap() at calltrap+0x8/frame 0xfffffe0016ad4640 --- trap 0xc, rip = 0xffffffff813e0139, rsp = 0xfffffe0016ad4710, rbp = 0xfffffe0016ad4770 --- in6_cksum_partial() at in6_cksum_partial+0x179/frame 0xfffffe0016ad4770 rip6_input() at rip6_input+0x5ff/frame 0xfffffe0016ad4850 ip6_input() at ip6_input+0x1a9b/frame 0xfffffe0016ad4970 swi_net() at swi_net+0x23b/frame 0xfffffe0016ad49f0 ithread_loop() at ithread_loop+0x2f2/frame 0xfffffe0016ad4a60 fork_exit() at fork_exit+0xb0/frame 0xfffffe0016ad4ab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0016ad4ab0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 12 tid 100017 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why