diff options
| author | Alan Cox <alan@linux.intel.com> | 2010-10-22 14:11:26 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-22 08:33:18 -0700 |
| commit | c19483cc5e56ac5e22dd19cf25ba210ab1537773 (patch) | |
| tree | 8255f43e5ba324f3718c375fce42047d677ae6ff | |
| parent | d4429f608abde89e8bc1e24b43cd503feb95c496 (diff) | |
bluetooth: Fix missing NULL check
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>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -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; |