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    SubjectRe: [PATCH v7 02/39] prctl: arch-agnostic prctl for shadow stack
    Date
    On Wed, 2023-11-22 at 09:42 +0000, Mark Brown wrote:
    > These features are expected to be inherited by new threads and
    > cleared
    > on exec(), unknown features should be rejected for enable but
    > accepted
    > for locking (in order to allow for future proofing).

    The reason why I stuck with arch_prctl when this came up is that CRIU
    (and probably other ptracers) needs a way to unlock via ptrace. ptrace
    arch_prctl() can do this. Did you have a plan for unlocking via ptrace?
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