Bluetooth: host: Terminate the pairing procedure when disconnected

Terminate the pairing procedure when disconnected while this was in
progress. This notifies the application that security has failed and
removes the key entry.

Signed-off-by: Joakim Andersson <[email protected]>

Author: joerchan

subsys/bluetooth/host/smp.c

@@ -4506,6 +4506,13 @@ static void bt_smp_disconnected(struct bt_l2cap_chan *chan)
 
 	k_delayed_work_cancel(&smp->work);
 
+	if (atomic_test_bit(smp->flags, SMP_FLAG_PAIRING) ||
+	    atomic_test_bit(smp->flags, SMP_FLAG_ENC_PENDING) ||
+	    atomic_test_bit(smp->flags, SMP_FLAG_SEC_REQ)) {
+		/* reset context and report */
+		smp_pairing_complete(smp, BT_SMP_ERR_UNSPECIFIED);
+	}
+
 	if (keys) {
 		/*
 		 * If debug keys were used for pairing remove them.