panic: trap type 4, code=0, pc=ffffffff81b53152
Starting stack trace...
panic(ffffffff833136eb) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff800036d83190) at kerntrap+0x2eb sys/arch/amd64/amd64/trap.c:486
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_msgrcv(ffff8000399399c8,ffff800036d833c0,ffff800036d83310) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline]
sys_msgrcv(ffff8000399399c8,ffff800036d833c0,ffff800036d83310) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349
syscall(ffff800036d833c0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff800036d833c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc9a66ab470, count: 251
End of stack trace.