static int reds_agent_state_restore(SpiceMigrateDataMain *mig_data)
{
    VDIPortState *agent_state = &reds->agent_state;
    uint32_t chunk_header_remaining;

    agent_state->vdi_chunk_header = mig_data->agent2client.chunk_header;
    spice_assert(mig_data->agent2client.chunk_header_size <= sizeof(VDIChunkHeader));
    chunk_header_remaining = sizeof(VDIChunkHeader) - mig_data->agent2client.chunk_header_size;
    if (chunk_header_remaining) {
        agent_state->read_state = VDI_PORT_READ_STATE_READ_HEADER;
        agent_state->receive_pos = (uint8_t *)&agent_state->vdi_chunk_header +
            mig_data->agent2client.chunk_header_size;
        agent_state->receive_len = chunk_header_remaining;
    } else {
        agent_state->message_receive_len = agent_state->vdi_chunk_header.size;
    }

    if (!mig_data->agent2client.msg_header_done) {
        uint8_t *partial_msg_header;

        if (!chunk_header_remaining) {
            uint32_t cur_buf_size;

            agent_state->read_state = VDI_PORT_READ_STATE_READ_DATA;
            agent_state->current_read_buf = vdi_port_read_buf_get();
            spice_assert(agent_state->current_read_buf);
            partial_msg_header = (uint8_t *)mig_data + mig_data->agent2client.msg_header_ptr -
                sizeof(SpiceMiniDataHeader);
            memcpy(agent_state->current_read_buf->data,
                   partial_msg_header,
                   mig_data->agent2client.msg_header_partial_len);
            agent_state->receive_pos = agent_state->current_read_buf->data +
                                      mig_data->agent2client.msg_header_partial_len;
            cur_buf_size = sizeof(agent_state->current_read_buf->data) -
                           mig_data->agent2client.msg_header_partial_len;
            agent_state->receive_len = MIN(agent_state->message_receive_len, cur_buf_size);
            agent_state->current_read_buf->len = agent_state->receive_len +
                                                 mig_data->agent2client.msg_header_partial_len;
            agent_state->message_receive_len -= agent_state->receive_len;
        } else {
            spice_assert(mig_data->agent2client.msg_header_partial_len == 0);
        }
    } else {
            agent_state->read_state = VDI_PORT_READ_STATE_GET_BUFF;
            agent_state->current_read_buf = NULL;
            agent_state->receive_pos = NULL;
            agent_state->read_filter.msg_data_to_read = mig_data->agent2client.msg_remaining;
            agent_state->read_filter.result = mig_data->agent2client.msg_filter_result;
    }

    agent_state->read_filter.discard_all = FALSE;
    agent_state->write_filter.discard_all = !mig_data->client_agent_started;
    agent_state->client_agent_started = mig_data->client_agent_started;

    agent_state->write_filter.msg_data_to_read = mig_data->client2agent.msg_remaining;
    agent_state->write_filter.result = mig_data->client2agent.msg_filter_result;

    spice_debug("to agent filter: discard all %d, wait_msg %u, msg_filter_result %d",
                agent_state->write_filter.discard_all,
                agent_state->write_filter.msg_data_to_read,
                 agent_state->write_filter.result);
    spice_debug("from agent filter: discard all %d, wait_msg %u, msg_filter_result %d",
                agent_state->read_filter.discard_all,
                agent_state->read_filter.msg_data_to_read,
                 agent_state->read_filter.result);
    return spice_char_device_state_restore(agent_state->base, &mig_data->agent_base);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.