RE: [PATCH] Crash in tun

	BTW, speaking of struct file treatment related to sockets -
there's this piece of code in iscsi:
        /*
         * The SCTP stack needs struct socket->file.
         */
        if ((np->np_network_transport == ISCSI_SCTP_TCP) ||
            (np->np_network_transport == ISCSI_SCTP_UDP)) {
                if (!new_sock->file) {
                        new_sock->file = kzalloc(
                                        sizeof(struct file),
GFP_KERNEL);

For one thing, as far as I can see it'not true - sctp does *not*
depend on socket->file being non-NULL; it does, in one place,
check socket->file->f_flags for O_NONBLOCK, but there it treats
NULL socket->file as "flag no set".

The SCTP code certainly has unconditionally looked at file->f_flags,
we had to allocate a 'struct file' for our in-kernel socket code.
We set sock->file = NULL before the sock_release() call so
hopefully don't suffer the 'side effects'.

	David