panic: trap type 4, code=0, pc=ffffffff813824ab
Starting stack trace...
panic(ffffffff82fdb31d) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000372bf360) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff8000372a2f70,ffff8000372bf610,ffff8000372bf560) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff8000372bf610) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000372bf610) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9b51672bb10, count: 251
End of stack trace.