diff options
| author | Alan Cox <alan@linux.intel.com> | 2010-10-22 14:11:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-22 10:47:30 -0800 |
| commit | 3502405eb88b9086acd4fe1dc5113122a19a2bb8 (patch) | |
| tree | 350d0b3fa78e73508b2ad05ff678c793d282bd06 | |
| parent | ebf7608d15a8029ede4b186ba5ec891d0ecfd716 (diff) | |
bluetooth: Fix missing NULL check
commit c19483cc5e56ac5e22dd19cf25ba210ab1537773 upstream.
Fortunately this is only exploitable on very unusual hardware.
[Reported a while ago but nothing happened so just fixing it]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 4895f0e05322..e3d4eda93ed9 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -258,9 +258,16 @@ 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; |