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Bluetooth: Check for valid HCI UART driver flags 

Providing unknown or invalid flags to the HCI UART driver should
result in an error. So check which flags are valid and otherwise
return an error.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2014-07-11 07:12:57 +02:00 committed by Johan Hedberg
parent 068d69e5bb
commit bb72bd68fd
1 changed files with 18 additions and 1 deletions
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19
drivers/bluetooth/hci_ldisc.c
View File

@ -477,6 +477,21 @@ static int hci_uart_set_proto(struct hci_uart *hu, int id)
return 0;
}
static int hci_uart_set_flags(struct hci_uart *hu, unsigned long flags)
{
unsigned long valid_flags = BIT(HCI_UART_RAW_DEVICE) |
BIT(HCI_UART_RESET_ON_INIT) |
BIT(HCI_UART_CREATE_AMP) |
BIT(HCI_UART_INIT_PENDING);
if ((flags & ~valid_flags))
return -EINVAL;
hu->hdev_flags = flags;
return 0;
}
/* hci_uart_tty_ioctl()
*
* Process IOCTL system call for the tty device.
@ -527,7 +542,9 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
case HCIUARTSETFLAGS:
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
return -EBUSY;
hu->hdev_flags = arg;
err = hci_uart_set_flags(hu, arg);
if (err)
return err;
break;
case HCIUARTGETFLAGS: