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-rw-r--r--net/bluetooth/hci_event.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 6ddc4a74a5e4..591e7477e925 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4557,6 +4557,16 @@ static void hci_user_confirm_request_evt(struct hci_dev *hdev,
goto confirm;
}
+ /* If there already exists link key in local host, leave the
+ * decision to user space since the remote device could be
+ * legitimate or malicious.
+ */
+ if (hci_find_link_key(hdev, &ev->bdaddr)) {
+ bt_dev_dbg(hdev, "Local host already has link key");
+ confirm_hint = 1;
+ goto confirm;
+ }
+
BT_DBG("Auto-accept of user confirmation with %ums delay",
hdev->auto_accept_delay);