CLSA-2023-1690395161 Fix of 12 CVEs

Bionic update: upstream stable patchset 2021-11-12 LP: 1950816 // CVE- url: https://ubuntu.com/security/CVE-2021-20321 - ovl: fix missing negative dentry check in ovlrename CVE-url: https://ubuntu.com/security/CVE-2021-20321 - ovl: cleanup unused var in rename2 Jammy update: v5.15.93 upstream...