panic: trap type 4, code=0, pc=ffffffff818443f2
Starting stack trace...
panic(ffffffff833a2066) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a407b50) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff800039c1ca88,ffff80002a407dd0,ffff80002a407d20) at sys_semop+0x352 sys/kern/sysv_sem.c:622
syscall(ffff80002a407dd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a407dd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb7b8a2fab90, count: 251
End of stack trace.