diff options
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 998833d93c1..17361bad46d 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -256,9 +256,16 @@ static int hci_uart_tty_open(struct tty_struct *tty) BT_DBG("tty %p", tty); + /* FIXME: This btw is bogus, nothing requires the old ldisc to clear + the pointer */ if (hu) return -EEXIST; + /* Error if the tty has no write op instead of leaving an exploitable + hole */ + if (tty->ops->write == NULL) + return -EOPNOTSUPP; + if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) { BT_ERR("Can't allocate control structure"); return -ENFILE; |