From: Matt Fleming <matt@codeblueprint.co.uk>
To: David Howells <dhowells@redhat.com>
Cc: Peter Jones <pjones@redhat.com>,
mjg59@srcf.ucam.org, ard.biesheuvel@linaro.org,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
"H. Peter Anvin" <hpa@zytor.com>, Michael Chang <mchang@suse.com>
Subject: Re: What should the default lockdown mode be if the bootloader sentinel triggers sanitization?
Date: Mon, 30 Jan 2017 13:50:02 +0000 [thread overview]
Message-ID: <20170130135002.GL31613@codeblueprint.co.uk> (raw)
In-Reply-To: <25118.1485778229@warthog.procyon.org.uk>
On Mon, 30 Jan, at 12:10:29PM, David Howells wrote:
>
> Matt argues, however, that boot_params->secure_boot should be propagated from
> the bootloader and if the bootloader wants to set it, then we should skip the
> check in efi_main() and go with the bootloader's opinion. This is something
> we probably want to do with kexec() so that the lockdown state is propagated
> there.
Actually what I was arguing for was that if the boot loader wants to
set it and bypass the EFI boot stub, e.g. by going via the legacy
64-bit entry point, startup_64, then we should allow that as well as
setting the flag in the EFI boot stub.
next prev parent reply other threads:[~2017-01-30 13:57 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-08 12:30 [PATCH 0/8] efi: Pass secure boot mode to kernel [ver #6] David Howells
2016-12-08 12:30 ` [PATCH 1/8] efi: use typed function pointers for runtime services table " David Howells
2016-12-08 12:30 ` [PATCH 2/8] x86/efi: Allow invocation of arbitrary runtime services " David Howells
2016-12-08 12:30 ` [PATCH 3/8] arm/efi: " David Howells
2016-12-08 12:30 ` [PATCH 4/8] efi: Add SHIM and image security database GUID definitions " David Howells
2016-12-08 12:30 ` [PATCH 5/8] efi: Get the secure boot status " David Howells
2017-01-11 14:33 ` Matt Fleming
2017-01-11 15:27 ` David Howells
2017-01-16 14:49 ` Matt Fleming
2017-01-16 15:39 ` David Howells
2017-01-23 10:52 ` David Howells
2017-01-23 21:26 ` Matt Fleming
2017-01-23 22:11 ` David Howells
2017-01-27 14:01 ` Matt Fleming
2017-01-31 14:02 ` David Howells
2017-01-30 12:10 ` What should the default lockdown mode be if the bootloader sentinel triggers sanitization? David Howells
2017-01-30 13:50 ` Matt Fleming [this message]
2017-01-30 14:01 ` David Howells
2017-01-31 11:57 ` Matt Fleming
2016-12-08 12:30 ` [PATCH 6/8] efi: Disable secure boot if shim is in insecure mode [ver #6] David Howells
2016-12-08 12:31 ` [PATCH 7/8] efi: Handle secure boot from UEFI-2.6 " David Howells
2016-12-08 12:31 ` [PATCH 8/8] efi: Add EFI_SECURE_BOOT bit " David Howells
2017-01-11 14:51 ` Matt Fleming
2017-01-11 15:29 ` David Howells
2017-01-16 13:40 ` Matt Fleming
2017-01-16 15:40 ` David Howells
2017-01-11 15:01 ` [PATCH 0/8] efi: Pass secure boot mode to kernel " Matt Fleming
2017-01-11 15:05 ` Ard Biesheuvel
2017-01-24 17:15 ` Ard Biesheuvel
2017-01-27 18:03 ` Ard Biesheuvel
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