static void __exit megasas_exit(void)
{
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_dbg_lvl);
	driver_remove_file(&megasas_pci_driver.driver,
			&driver_attr_support_poll_for_event);
	driver_remove_file(&megasas_pci_driver.driver,
			&driver_attr_support_device_change);
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_release_date);
	driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
	driver_remove_file(&megasas_pci_driver.driver,
			   &driver_attr_support_nvme_encapsulation);

	pci_unregister_driver(&megasas_pci_driver);
	unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
}

The product dereferences a pointer that it expects to be valid but is NULL.