linux-kernel - [PATCH 0/6] firmware: kernel signature verification

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Date:   Tue,  1 May 2018 09:48:17 -0400
From:   Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:     linux-integrity@...r.kernel.org
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Peter Jones <pjones@...hat.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
        "Luis R . Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH 0/6] firmware: kernel signature verification 

Allow LSMs and IMA to differentiate between different methods of
firmware loading (eg. direct loading, sysfs fallback) and to
differentiate/coordinate between signature verification methods (eg.
regdb, IMA-appraisal).

In addition, the last two patches address the pre-allocated buffer.  The
first of these patches doesn't differentiate between reading the
firmware first into kernel memory and verifying the kernel signature,
versus reading the firmware directly into a pre-allocated buffer.

The last patch, which is posted as an RFC, questions whether the device
can access the pre-allocated buffer before the kernel signature has been
verified.

Mimi Zohar (6):
  firmware: permit LSMs and IMA to fail firmware sysfs fallback loading
  ima: prevent sysfs fallback firmware loading
  firmware: differentiate between signed regulatory.db and other
    firmware
  ima: coordinate with signed regulatory.db
  ima: verify kernel firmware signatures when using a preallocated
    buffer
  ima: prevent loading firmware into a pre-allocated buffer

 drivers/base/firmware_loader/fallback.c |  7 +++++++
 drivers/base/firmware_loader/main.c     |  5 +++++
 include/linux/fs.h                      |  2 ++
 security/integrity/ima/ima_main.c       | 29 +++++++++++++++++++++++++++--
 4 files changed, 41 insertions(+), 2 deletions(-)

-- 
2.7.5