Description: efivarfs: force RO when remounting if SetVariable is not supported
References:
Notes:
 carnil> Commit fixes f88814cc2578 ("efi/efivars: Expose RT service
 carnil> availability via efivars abstraction") in 5.8-rc7 (and 5.7.11)
Bugs:
upstream: released (6.8-rc1) [0e8d2444168dd519fea501599d150e62718ed2fe]
6.7-upstream-stable: released (6.7.2) [d4a714873db0866cc471521114eeac4a5072d548]
6.6-upstream-stable: released (6.6.14) [0049fe7e4a85849bdd778cdb72e51a791ff3d737]
6.1-upstream-stable: released (6.1.75) [d4a9aa7db574a0da64307729cc031fb68597aa8b]
5.10-upstream-stable: released (5.10.209) [94c742324ed7e42c5bd6a9ed22e4ec6d764db4d8]
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.6.15-1)
6.1-bookworm-security: released (6.1.76-1)
5.10-bullseye-security: released (5.10.209-1)
4.19-buster-security: N/A "Vulnerable code not present"