is the hand-coded assembly code CET enabled?

I.e. does it have shstk and ibt?

Ceph uses https://github.com/intel/isa-l/blob/master/crc/crc32_iscsi_00.asm.

Fedora (now, and RHEL and CentOS eventually) require that all build artifacts (e.g. executables and shared libs) be CET enabled.

It's trivial to add a .note.gnu.property NOTE section that advertises (or lies) that is is CET enabled. It wouldn't be a lie though if the code actually is shstk and ibt enabled.