panic: invalid dst page 0xfffff8007f0aef98
cpuid = 0
time = 1552956175
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00212db750
vpanic() at vpanic+0x1e0/frame 0xfffffe00212db7b0
panic() at panic+0x43/frame 0xfffffe00212db810
vm_fault_copy_entry() at vm_fault_copy_entry+0x808/frame 0xfffffe00212db8d0
vm_map_protect() at vm_map_protect+0x5f9/frame 0xfffffe00212db940
sys_mprotect() at sys_mprotect+0xcc/frame 0xfffffe00212db980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe00212dbab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00212dbab0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdffdcf38, rbp = 0x3 ---
KDB: enter: panic
[ thread pid 1665 tid 100552 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why