CVE-2022-49899 fscrypt: stop using keyrings subsystem for fscrypt_master_key

In the Linux kernel, the following vulnerability has been resolved: fscrypt: stop using keyrings subsystem for fscryptmasterkey The approach of fs/crypto/ internally managing the fscryptmasterkey structs as the payloads of "struct key" objects contained in a "struct key" keyring has outlived its...