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Ts'o" , Matthew Garrett , Linus Torvalds , Ard Biesheuvel , Alan Cox , Linux Kernel Mailing List , Justin Forbes , linux-man , joeyli , LSM List , Linux API , Kees Cook , linux-efi Subject: Re: An actual suggestion (Re: [GIT PULL] Kernel lockdown for secure boot) In-Reply-To: <1119.1522858644@warthog.procyon.org.uk> Message-ID: References: <1119.1522858644@warthog.procyon.org.uk> User-Agent: Alpine 2.21 (LRH 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, 4 Apr 2018, David Howells wrote: > > 6. There's a way to *decrease* the lockdown level below the configured > > value. (This ability itself may be gated by a config option.) > > Choices include a UEFI protected variable, > > By turning secure boot off, maybe? It's surely reasonable to allow an already secure-booted system to be debugged without needing to be rebooted. - James -- James Morris