panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/main/kernel/sys/arch/amd64/amd64/intr.c", line 775 Starting stack trace... panic(ffffffff830b0041) at panic+0x1ba sys/kern/subr_prf.c:229 __assert(ffffffff8306a8c8,ffffffff83063dab,307,ffffffff8301ea5f) at __assert+0x29 splraise(dead4110) at splraise+0xad sys/arch/amd64/amd64/intr.c:775 mtx_enter(ffff8000012e2a08) at mtx_enter+0x9e sys/kern/kern_lock.c:308 klist_mutex_lock(ffff8000012e2a08) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000012e2aa8) at klist_invalidate+0xe6 klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000012e2aa8) at klist_invalidate+0xe6 sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012fbcc0) at bpfsdetach+0xff sys/net/bpf.c:1800 bpfdetach(ffff80000125e000) at bpfdetach+0x76 if_detach(ffff80000125e000) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff80000125e000) at tun_clone_destroy+0x2aa sys/net/if_tun.c:338 if_clone_destroy(ffff8000376ffc80) at if_clone_destroy+0x1d7 sys/net/if.c:1382 sys_ioctl(ffff8000341fa7c0,ffff8000376ffe60,ffff8000376ffdb0) at sys_ioctl+0x678 syscall(ffff8000376ffe60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcc297b2f420, count: 243 End of stack trace.