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(ffffffff827a3044) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff8281f9a9,ffffffff827ac472,2bb,ffffffff827a3e5f) at __assert+0x29 sys/kern/subr_prf.c:157
splraise(8e55cc23) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699
mtx_enter_try(fffffd807e948d80) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291
mtx_enter(fffffd807e948d80) at mtx_enter+0x4f sys/kern/kern_lock.c:266
knote_remove(ffff80002124ad50,fffffd807e948d80,fffffd807e948e08,6,0) at knote_remove+0x20d sys/kern/kern_event.c:1881
knote_fdclose(ffff80002124ad50,6) at knote_fdclose+0xae sys/kern/kern_event.c:1934
fdfree(ffff80002124ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196
exit1(ffff80002124ad50,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206
sys_exit(ffff80002124ad50,ffff80002127b290,ffff80002127b2e0) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff80002127b360) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff80002127b360) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6fdbf4de4920, count: 245
End of stack trace.