Bluetooth: Fix validating IO capability values in mgmt commands
The valid range of IO capabilities for the Set IO Capability and Pair
Device mgmt commands is 0-4 (4 being the KeyboarDisplay capability for
SMP). We should return an invalid parameters error if user space gives
us a value outside of this range.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 99eb845..5bf032d 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2766,6 +2766,10 @@
BT_DBG("");
+ if (cp->io_capability > SMP_IO_KEYBOARD_DISPLAY)
+ return cmd_complete(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY,
+ MGMT_STATUS_INVALID_PARAMS, NULL, 0);
+
hci_dev_lock(hdev);
hdev->io_capability = cp->io_capability;
@@ -2878,6 +2882,11 @@
MGMT_STATUS_INVALID_PARAMS,
&rp, sizeof(rp));
+ if (cp->io_cap > SMP_IO_KEYBOARD_DISPLAY)
+ return cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
+ MGMT_STATUS_INVALID_PARAMS,
+ &rp, sizeof(rp));
+
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {