diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-29 18:15:28 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2017-04-12 22:02:39 +0200 |
| commit | dcb9cfaa5ea9aa0ec08aeb92582ccfe3e4c719a9 (patch) | |
| tree | df31b92dca47e28ce3c146d622b3c35049ab6fff /drivers/bluetooth | |
| parent | 95065a61e9bf25fb85295127fba893200c2bbbd8 (diff) | |
| download | linux-next-dcb9cfaa5ea9aa0ec08aeb92582ccfe3e4c719a9.tar.gz | |
Bluetooth: hci_intel: add missing tty-device sanity check
Make sure to check the tty-device pointer before looking up the sibling
platform device to avoid dereferencing a NULL-pointer when the tty is
one end of a Unix98 pty.
Fixes: 74cdad37cd24 ("Bluetooth: hci_intel: Add runtime PM support")
Fixes: 1ab1f239bf17 ("Bluetooth: hci_intel: Add support for platform driver")
Cc: stable <stable@vger.kernel.org> # 4.3
Cc: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_intel.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c index d915e7eee233..fa5099986f1b 100644 --- a/drivers/bluetooth/hci_intel.c +++ b/drivers/bluetooth/hci_intel.c @@ -307,6 +307,9 @@ static int intel_set_power(struct hci_uart *hu, bool powered) struct list_head *p; int err = -ENODEV; + if (!hu->tty->dev) + return err; + mutex_lock(&intel_device_list_lock); list_for_each(p, &intel_device_list) { @@ -379,6 +382,9 @@ static void intel_busy_work(struct work_struct *work) struct intel_data *intel = container_of(work, struct intel_data, busy_work); + if (!intel->hu->tty->dev) + return; + /* Link is busy, delay the suspend */ mutex_lock(&intel_device_list_lock); list_for_each(p, &intel_device_list) { @@ -899,6 +905,8 @@ done: list_for_each(p, &intel_device_list) { struct intel_device *dev = list_entry(p, struct intel_device, list); + if (!hu->tty->dev) + break; if (hu->tty->dev->parent == dev->pdev->dev.parent) { if (device_may_wakeup(&dev->pdev->dev)) { set_bit(STATE_LPM_ENABLED, &intel->flags); @@ -1066,6 +1074,9 @@ static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb) BT_DBG("hu %p skb %p", hu, skb); + if (!hu->tty->dev) + goto out_enqueue; + /* Be sure our controller is resumed and potential LPM transaction * completed before enqueuing any packet. */ @@ -1082,7 +1093,7 @@ static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb) } } mutex_unlock(&intel_device_list_lock); - +out_enqueue: skb_queue_tail(&intel->txq, skb); return 0; |