diff options
| author | Michael Knudsen <m.knudsen@samsung.com> | 2014-02-18 09:48:08 +0100 |
|---|---|---|
| committer | Johan Hedberg <johan.hedberg@intel.com> | 2014-03-04 11:03:14 +0200 |
| commit | c327cddd184059d018b12d7ef818ba0961200079 (patch) | |
| tree | 61434dce7c8a233fbdf0f2c6103c27321202cb1f | |
| parent | 81ad6fd9698f659dbabdc6cd3e1667a98eb2be3b (diff) | |
Bluetooth: Stop BCSP/H5 timer before cleaning up
When stopping BCSP/H5, stop the retransmission timer before proceeding
to clean up packet queues. The previous code had a race condition where
the timer could trigger after the packet lists and protocol structure
had been removed which led to dereferencing NULL or use-after-free bugs.
Signed-off-by: Michael Knudsen <m.knudsen@samsung.com>
Reported-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
| -rw-r--r-- | drivers/bluetooth/hci_bcsp.c | 4 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_h5.c | 4 |
2 files changed, 5 insertions, 3 deletions
diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c index 0bc87f7abd95..eee2fb23b3bf 100644 --- a/drivers/bluetooth/hci_bcsp.c +++ b/drivers/bluetooth/hci_bcsp.c @@ -715,6 +715,9 @@ static int bcsp_open(struct hci_uart *hu) static int bcsp_close(struct hci_uart *hu) { struct bcsp_struct *bcsp = hu->priv; + + del_timer_sync(&bcsp->tbcsp); + hu->priv = NULL; BT_DBG("hu %p", hu); @@ -722,7 +725,6 @@ static int bcsp_close(struct hci_uart *hu) skb_queue_purge(&bcsp->unack); skb_queue_purge(&bcsp->rel); skb_queue_purge(&bcsp->unrel); - del_timer(&bcsp->tbcsp); kfree(bcsp); return 0; diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c index f6f497450560..afd759eaa704 100644 --- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -206,12 +206,12 @@ static int h5_close(struct hci_uart *hu) { struct h5 *h5 = hu->priv; + del_timer_sync(&h5->timer); + skb_queue_purge(&h5->unack); skb_queue_purge(&h5->rel); skb_queue_purge(&h5->unrel); - del_timer(&h5->timer); - kfree(h5); return 0; |