Re: [GIT PULL] Kernel lockdown for secure boot

From: David Howells
Date: Wed Apr 04 2018 - 09:33:48 EST

Theodore Y. Ts'o <tytso@xxxxxxx> wrote:

> Whoa. Why doesn't lockdown prevent kexec? Put another away, why
> isn't this a problem for people who are fearful that Linux could be
> used as part of a Windows boot virus in a Secure UEFI context?

Lockdown mode restricts kexec to booting an authorised image (where the
authorisation may be by signature or by IMA).