panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 699
Starting stack trace...
panic(ffffffff827a0ed8) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff8281e021,ffffffff827a6f33,2bb,ffffffff8279ec7d) at __assert+0x29 sys/kern/subr_prf.c:157
splraise(89762707) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699
mtx_enter_try(fffffd807301c000) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291
mtx_enter(fffffd807301c000) at mtx_enter+0x4f sys/kern/kern_lock.c:266
knote_remove(ffff800021239008,fffffd807301c000,fffffd807301c088,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881
knote_fdclose(ffff800021239008,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934
fdfree(ffff800021239008) at fdfree+0xdf sys/kern/kern_descrip.c:1196
exit1(ffff800021239008,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206
sys_exit(ffff800021239008,ffff800024764f10,ffff800024764f60) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff800024764fe0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff800024764fe0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x724f35cbf920, count: 245
End of stack trace.