Hi Coiby,
On Mon, 2022-11-21 at 15:29 +0800, Coiby Xu wrote:
> A kernel builder may not enable KEXEC_SIG and some architectures like
> ppc64 simply don't have KEXEC_SIG. In these cases, unless both
> IMA_ARCH_POLICY and secure boot also enabled, lockdown doesn't prevent
> unsigned kernel image from being kexec'ed via the kexec_file_load
> syscall whereas it could prevent one via the kexec_load syscall. Mandate
> signature verification for those cases.
>
> Fixes: 155bdd30af17 ("kexec_file: Restrict at runtime if the kernel is locked
> down")
> Cc: Matthew Garrett <[email protected]>
> Cc: Jiri Bohac <[email protected]>
> Cc: David Howells <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> Signed-off-by: Coiby Xu <[email protected]>
Other than correcting the function name to mandate_signature_verificati
on(),
Reviewed-by: Mimi Zohar <[email protected]>
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