1 files changed, 7 insertions, 1 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index c3b0a08f5ab4..128e65ac60ae 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3961,7 +3961,13 @@ static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 
         hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
 
-        if (ltk->type & HCI_SMP_STK) {
+        /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
+         * temporary key used to encrypt a connection following
+         * pairing. It is used during the Encrypted Session Setup to
+         * distribute the keys. Later, security can be re-established
+         * using a distributed LTK.
+         */
+        if (ltk->type == HCI_SMP_STK_SLAVE) {
                 list_del(&ltk->list);
                 kfree(ltk);
         }