Nordic BLE:

Cancel pairing if the device fail to allocate the resources necessary for the pairing operation.

Author: pan-

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF51/source/nRF5xPalSecurityManager.cpp

@@ -300,6 +300,9 @@ ble_error_t nRF5xSecurityManager::send_pairing_response(
 ) {
     pairing_control_block_t* pairing_cb = allocate_pairing_cb(connection);
     if (!pairing_cb) {
+        // not enough memory; try to reject the pairing request instead of
+        // waiting for timeout.
+        cancel_pairing(connection, pairing_failure_t::UNSPECIFIED_REASON);
         return BLE_ERROR_NO_MEM;
     }
     pairing_cb->role = PAIRING_RESPONDER;

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF52/source/nRF5xPalSecurityManager.cpp

@@ -277,6 +277,9 @@ ble_error_t nRF5xSecurityManager::send_pairing_response(
 ) {
     pairing_control_block_t* pairing_cb = allocate_pairing_cb(connection);
     if (!pairing_cb) {
+        // not enough memory; try to reject the pairing request instead of
+        // waiting for timeout.
+        cancel_pairing(connection, pairing_failure_t::UNSPECIFIED_REASON);
         return BLE_ERROR_NO_MEM;
     }
     pairing_cb->role = PAIRING_RESPONDER;