panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/main/kernel/sys/arch/amd64/amd64/intr.c", line 803
Starting stack trace...
panic(ffffffff8337f6c6) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833b997c,ffffffff83320965,323,ffffffff8335bb4a) at __assert+0x29 sys/kern/subr_prf.c:-1
splraise(8347f680) at splraise+0xad
mtx_enter(ffff8000ffff4e90) at mtx_enter+0xc8 sys/kern/kern_lock.c:554
filt_procdetach(fffffd8065d54080) at filt_procdetach+0x4d sys/kern/kern_event.c:432
knote_remove(ffff80002a7bc7e8,fffffd806f5ac0b8,fffffd806f5ac130,6,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline]
knote_remove(ffff80002a7bc7e8,fffffd806f5ac0b8,fffffd806f5ac130,6,1) at knote_remove+0x22e sys/kern/kern_event.c:2154
kqueue_purge(ffff80002a7bc7e8,fffffd806f5ac0b8) at kqueue_purge+0x117 sys/kern/kern_event.c:1890
kqueue_close(fffffd80787c2628,ffff80002a7bc7e8) at kqueue_close+0x48 sys/kern/kern_event.c:1934
fdrop(fffffd80787c2628,ffff80002a7bc7e8) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd80787c2628,ffff80002a7bc7e8) at closef+0x190 sys/kern/kern_descrip.c:1264
fdfree(ffff80002a7bc7e8) at fdfree+0x115 sys/kern/kern_descrip.c:1195
exit1(ffff80002a7bc7e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80002a7bc7e8,ffff80003c96f670,ffff80003c96f5c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c96f670) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c96f670) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77dbe0cdf5c0, count: 242
End of stack trace.