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loader/xnu: Don't allow loading extension and packages when locked down

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The shim_lock verifier validates the XNU kernels but no its extensions
and packages. Prevent these to be loaded when the GRUB is locked down.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Javier Martinez Canillas 2021-02-24 14:44:38 +01:00 committed by Daniel Kiper
parent 5082708389
commit 9c5565135f
1 changed files with 17 additions and 14 deletions
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31
grub-core/loader/xnu.c
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@ -1485,20 +1485,23 @@ GRUB_MOD_INIT(xnu)
N_("Load XNU image."));
cmd_kernel64 = grub_register_command ("xnu_kernel64", grub_cmd_xnu_kernel64,
0, N_("Load 64-bit XNU image."));
cmd_mkext = grub_register_command ("xnu_mkext", grub_cmd_xnu_mkext, 0,
N_("Load XNU extension package."));
cmd_kext = grub_register_command ("xnu_kext", grub_cmd_xnu_kext, 0,
N_("Load XNU extension."));
cmd_kextdir = grub_register_command ("xnu_kextdir", grub_cmd_xnu_kextdir,
/* TRANSLATORS: OSBundleRequired is a
variable name in xnu extensions
manifests. It behaves mostly like
GNU/Linux runlevels.
*/
N_("DIRECTORY [OSBundleRequired]"),
/* TRANSLATORS: There are many extensions
in extension directory. */
N_("Load XNU extension directory."));
cmd_mkext = grub_register_command_lockdown ("xnu_mkext", grub_cmd_xnu_mkext, 0,
N_("Load XNU extension package."));
cmd_kext = grub_register_command_lockdown ("xnu_kext", grub_cmd_xnu_kext, 0,
N_("Load XNU extension."));
cmd_kextdir = grub_register_command_lockdown ("xnu_kextdir", grub_cmd_xnu_kextdir,
/*
* TRANSLATORS: OSBundleRequired is
* a variable name in xnu extensions
* manifests. It behaves mostly like
* GNU/Linux runlevels.
*/
N_("DIRECTORY [OSBundleRequired]"),
/*
* TRANSLATORS: There are many extensions
* in extension directory.
*/
N_("Load XNU extension directory."));
cmd_ramdisk = grub_register_command ("xnu_ramdisk", grub_cmd_xnu_ramdisk, 0,
/* TRANSLATORS: ramdisk here isn't identifier. It can be translated. */
N_("Load XNU ramdisk. "