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(ffffffff830b2053) at panic+0x1ba sys/kern/subr_prf.c:229 __assert(ffffffff83069149,ffffffff830611eb,307,ffffffff8301c3bd) at __assert+0x29 splraise(dead4110) at splraise+0xad sys/arch/amd64/amd64/intr.c:775 mtx_enter(ffff8000012da208) at mtx_enter+0x9e sys/kern/kern_lock.c:308 klist_mutex_lock(ffff8000012da208) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000012da2a8) at klist_invalidate+0xe6 klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000012da2a8) at klist_invalidate+0xe6 sys/kern/kern_event.c:2283 bpfsdetach(ffff8000012a5c80) at bpfsdetach+0xff sys/net/bpf.c:1800 bpfdetach(ffff800001297800) at bpfdetach+0x76 if_detach(ffff800001297800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff800001297800) at tun_clone_destroy+0x2aa sys/net/if_tun.c:338 if_clone_destroy(ffff8000376594f0) at if_clone_destroy+0x1d7 sys/net/if.c:1382 sys_ioctl(ffff80002a4e3bf8,ffff8000376596d0,ffff800037659620) at sys_ioctl+0x678 syscall(ffff8000376596d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0ceab1e330, count: 243 End of stack trace.