Bluetooth: mgmt: Don't allow to set invalid value to DeviceID source

Reply with MGMT_STATUS_INVALID_PARAMS when userspace is trying to set
source with out-of-scope value.

Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Acked-by: Gustavo Padovan <gustavo@padovan.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 402cb0026f5d..f590dfbe9e07 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2532,12 +2532,19 @@ static int set_device_id(struct sock *sk, struct hci_dev *hdev, void *data,
 {
         struct mgmt_cp_set_device_id *cp = data;
         int err;
+        __u16 source;
 
         BT_DBG("%s", hdev->name);
 
+        source = __le16_to_cpu(cp->source);
+
+        if (source > 0x0002)
+                return cmd_status(sk, hdev->id, MGMT_OP_SET_DEVICE_ID,
+                                  MGMT_STATUS_INVALID_PARAMS);
+
         hci_dev_lock(hdev);
 
-        hdev->devid_source = __le16_to_cpu(cp->source);
+        hdev->devid_source = source;
         hdev->devid_vendor = __le16_to_cpu(cp->vendor);
         hdev->devid_product = __le16_to_cpu(cp->product);
         hdev->devid_version = __le16_to_cpu(cp->version);