CVE-2023-52449 mtd: Fix gluebi NULL pointer dereference caused by ftl notifier

In the Linux kernel, the following vulnerability has been resolved: mtd: Fix gluebi NULL pointer dereference caused by ftl notifier If both ftl.ko and gluebi.ko are loaded, the notifier of ftl triggers NULL pointer dereference when trying to access ‘gluebi-desc’ in gluebiread. ubigluebiinit...