panic: Incrementing non-positive ref count DIAGNOSIS: retrieving stacks: connecting to control server at PID 6452: connection refused Error collecting stacks: failed to run ["/syzkaller/managers/kvm-direct-overlay-host-race/current/image" "-root" "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=ptrace" "-file-access=exclusive" "-overlay" "-network=host" "debug" "-stacks" "ci-gvisor-kvm-direct-overlay-host-race-0"]: exit status 128 retrieving stacks: connecting to control server at PID 6452: connection refused