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Bluetooth: Check for valid HCI UART driver flags

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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
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@ -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: