Fix an OOB bug in btm_ble_process_periodic_adv_sync_lost_evt

Bug: 255305114
Test: manual
Tag: #security
Ignore-AOSP-First: security
Change-Id: I7b7f071017a6c04f6bee901f7151e4f5df0a0c64

system/stack/btm/ble_scanner_hci_interface.cc

@@ -418,6 +418,11 @@ void btm_ble_process_periodic_adv_sync_lost_evt(uint8_t data_len,
                                                 uint8_t* data) {
   uint16_t sync_handle;
 
+  if (data_len < 2) {
+    LOG(ERROR) << "Bogus event packet, too short";
+    return;
+  }
+
   STREAM_TO_UINT16(sync_handle, data);
 
   if (BleScannerHciInterface::Get()) {