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    SubjectRe: [PATCH 07/27] kexec_file: Disable at runtime if securelevel has been set
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    [Cc'ing Matthew Garrett]

    On Thu, 2017-10-26 at 16:02 +0100, David Howells wrote:
    > joeyli <jlee@suse.com> wrote:
    >
    > > + if (!IS_ENABLED(CONFIG_KEXEC_VERIFY_SIG) &&
    > > + !is_ima_appraise_enabled() &&
    > > + kernel_is_locked_down("kexec of unsigned images"))
    >
    > This doesn't seem right. It seems that you can then kexec unsigned images
    > into a locked-down kernel if IMA appraise is enabled.

    Huh?!  With the "secure_boot" policy enabled on the boot command line,
    IMA-appraisal would verify the kexec kernel image, firmware, kernel
    modules, and custom IMA policy signatures.  With the "ima: require
    secure_boot rules in lockdown mode" patch, the "lockdown" mode would
    enable IMA-appraisal's secure_boot policy, without requiring the boot
    command line option.  It would also add the secure_boot rules to the
    custom policy, so that if the builtin policy is replaced with a custom
    policy, the "secure_boot" policy would still be enforced.

    Other patches in this patch series need to be updated as well to check
    if IMA-appraisal is enabled.

    Mimi

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