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Bluetooth: hci_ldisc: Add missing clear HCI_UART_PROTO_READY 

Ensure that HCI_UART_PROTO_READY is cleared before close(hu) is
called which closes the Data Link protocol layer.

Therefore, add the missing bit clear of HCI_UART_PROTO_READY to
hci_uart_init_work() so that the flag is cleared when
hci_register_dev fails.

Without the fix, the functions of the Data Link protocol layer could
potentially be accessed after that layer has been closed. This
could lead to a crash as memory would have been freed in that layer.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Dean Jenkins 2017-04-20 18:06:41 +01:00 committed by Marcel Holtmann
parent a225b8c70a
commit d160b74da8
1 changed files with 1 additions and 0 deletions
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drivers/bluetooth/hci_ldisc.c
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@ -188,6 +188,7 @@ static void hci_uart_init_work(struct work_struct *work)
hdev = hu->hdev; hdev = hu->hdev;
hu->hdev = NULL; hu->hdev = NULL;
hci_free_dev(hdev); hci_free_dev(hdev);
clear_bit(HCI_UART_PROTO_READY, &hu->flags);
hu->proto->close(hu); hu->proto->close(hu);
return; return;
} }