syzbot

panic: curcpu->ci_proc_pmap didn't point to previous pmap
Starting stack trace...
panic(ffffffff833621dd) at panic+0x1d0 sys/kern/subr_prf.c:229
switch_restored() at switch_restored+0x3f
preempt() at preempt+0x6a sys/kern/sched_bsd.c:338
ast(ffff800037286c10) at ast+0x165 mi_ast sys/sys/syscall_mi.h:261 [inline]
ast(ffff800037286c10) at ast+0x165 sys/arch/amd64/amd64/trap.c:541
intr_user_exit() at intr_user_exit+0x3c
end trace frame: 0x0, count: 252
End of stack trace.