[GPU] fix memory conflict for multi iteration in loop.

src/plugins/intel_gpu/src/graph/loop.cpp

@@ -1009,6 +1009,12 @@ void loop_inst::set_memory_in_body_network(cldnn::network::ptr body_network,
                         "impl_params layout size(", impl_layout.to_short_string(),
                         ") should not exceed memory size(", updated_mem->get_layout().to_short_string(), ")");
         // Set need_to_check_memory_to_set to false to set output memory even if the input node has static shape,
+        if (impl_layout.bytes_count() < updated_mem->get_layout().bytes_count()) {
+            auto& inst_engine = body_network->get_engine();
+            auto new_mem = inst_engine.allocate_memory(updated_mem->get_layout(), updated_mem->get_allocation_type(), true);
+            new_mem->copy_from(body_network->get_stream(), *updated_mem);
+            updated_mem = new_mem;
+        }
         body_network->set_input_data(inst->id(), updated_mem, false);
         // Update impl_params.output_layouts[0] to updated_mem's layout
         inst->update_shape();