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Tue, 3 Apr 2018 20:19:46 -0400 X-Google-Smtp-Source: AIpwx49R7F1mrTXdDxuUXFG12LVBMaxhlJJ7Klh58eeg4cSjOXibW2QwquwEQ1zbR6Xq2Ws99URiyPC2HzBAtahhTyQ= MIME-Version: 1.0 References: <4136.1522452584@warthog.procyon.org.uk> <186aeb7e-1225-4bb8-3ff5-863a1cde86de@kernel.org> <30459.1522739219@warthog.procyon.org.uk> <9758.1522775763@warthog.procyon.org.uk> <13189.1522784944@warthog.procyon.org.uk> <9349.1522794769@warthog.procyon.org.uk> In-Reply-To: From: Matthew Garrett Date: Wed, 04 Apr 2018 00:19:35 +0000 Message-ID: Subject: Re: [GIT PULL] Kernel lockdown for secure boot To: luto@kernel.org Cc: Linus Torvalds , David Howells , Ard Biesheuvel , jmorris@namei.org, Alan Cox , Greg Kroah-Hartman , Linux Kernel Mailing List , jforbes@redhat.com, linux-man@vger.kernel.org, jlee@suse.com, LSM List , linux-api@vger.kernel.org, Kees Cook , linux-efi Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-security-module@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Tue, Apr 3, 2018 at 5:18 PM Andy Lutomirski wrote: > if your secure boot-enabled bootloader can't prevent a bad guy from > using malicious kernel command line parameters, then fix it. How is a bootloader supposed to know what the set of malicious kernel command line parameters is?