panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/main/kernel/sys/arch/amd64/amd64/intr.c", line 775 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 75310 81764 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b4502) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83068ba9,ffffffff83060413,307,ffffffff8301b203) at __assert+0x29 splraise(deafbead) at splraise+0xad sys/arch/amd64/amd64/intr.c:775 mtx_enter(ffff800001305008) at mtx_enter+0x9e sys/kern/kern_lock.c:308 klist_mutex_lock(ffff800001305008) at klist_mutex_lock+0x32 sys/kern/kern_event.c:2352 klist_invalidate(ffff8000013050a8) at klist_invalidate+0xe6 klist_lock sys/kern/kern_event.c:2317 [inline] klist_invalidate(ffff8000013050a8) at klist_invalidate+0xe6 sys/kern/kern_event.c:2283 bpfsdetach(ffff800001279780) at bpfsdetach+0xff sys/net/bpf.c:1800 bpfdetach(ffff800001268800) at bpfdetach+0x76 if_detach(ffff800001268800) at if_detach+0x14f sys/net/if.c:1193 tun_clone_destroy(ffff800001268800) at tun_clone_destroy+0x2aa sys/net/if_tun.c:338 if_clone_destroy(ffff800037637420) at if_clone_destroy+0x1d7 sys/net/if.c:1382 sys_ioctl(ffff800037630f58,ffff800037637600,ffff800037637550) at sys_ioctl+0x678 syscall(ffff800037637600) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037637680, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.