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(ffffffff8279c1e8) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff8281ee27,ffffffff827ac25b,2bb,ffffffff827a3e4a) at __assert+0x29 sys/kern/subr_prf.c:157
splraise(dc2ab4ed) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699
mtx_enter_try(fffffd806f1d81b0) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291
mtx_enter(fffffd806f1d81b0) at mtx_enter+0x4f sys/kern/kern_lock.c:266
knote_remove(ffff800021238ff0,fffffd806f1d81b0,fffffd806f1d8238,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881
knote_fdclose(ffff800021238ff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934
fdfree(ffff800021238ff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196
exit1(ffff800021238ff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206
sys_exit(ffff800021238ff0,ffff80002e407970,ffff80002e4079c0) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002e407a40) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002e407a40) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7307f5b161b0, count: 245
End of stack trace.