Thread (109 messages) 109 messages, 20 authors, 2018-11-21

[GIT PULL] Kernel lockdown for secure boot

From: luto@kernel.org (Andy Lutomirski)
Date: 2018-04-04 00:18:34
Also in: linux-api, linux-efi, linux-man, lkml

On Tue, Apr 3, 2018 at 5:16 PM, Matthew Garrett [off-list ref] wrote:
On Tue, Apr 3, 2018 at 5:15 PM Linus Torvalds
[off-list ref]
wrote:
quoted
On Tue, Apr 3, 2018 at 5:10 PM, Matthew Garrett [off-list ref] wrote:
quoted
quoted
Exactly like EVERY OTHER KERNEL CONFIG OPTION.
So your argument is that we should make the user experience worse?
Without
quoted
quoted
some sort of verified boot mechanism, lockdown is just security theater.
There's no good reason to enable it unless you have some mechanism for
verifying that you booted something you trust.
quoted
Wow. Way to snip the rest of the email where I told you what the
solution was. Let me repeat it here, since you so conveniently missed
it and deleted it:
I ignored it because it's not a viable option. Part of the patchset
disables various kernel command line options. If there's a kernel command
line option that disables the patchset then it's pointless.
if your secure boot-enabled bootloader can't prevent a bad guy from
using malicious kernel command line parameters, then fix it.
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