Comment # 1 on bug 1194482 from Hans Petter Jansson

I think that message is a red herring. It's just an unfortunately worded debug
message regarding pledge(). From clientloop.c:

    > } else if (options.update_hostkeys) {
        > debug("pledge: filesystem full");
        > if (pledge("stdio rpath wpath cpath unix inet dns proc tty",
        >     NULL) == -1)
            > fatal_f("pledge(): %s", strerror(errno));

The problem is likely something else, might be something outside openssh too.