linux-kernel - [PATCH 0/3] kexec: limit kexec

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Message-Id: <1523572911-16363-1-git-send-email-zohar@linux.vnet.ibm.com>
Date:   Thu, 12 Apr 2018 18:41:48 -0400
From:   Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Matthew Garrett <mjg59@...gle.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Eric Biederman <ebiederm@...ssion.com>,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] kexec: limit kexec_load syscall

In environments that require the kexec kernel image to be signed, prevent
using the kexec_load syscall.  In order for LSMs and IMA to differentiate
between kexec_load and kexec_file_load syscalls, this patch set adds a
call to security_kernel_read_file() in kexec_load_check().

Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>

Mimi Zohar (3):
  ima: based on the "secure_boot" policy limit syscalls
  kexec: call LSM hook for kexec_load syscall
  ima: based on policy require signed kexec kernel images

 kernel/kexec.c                      | 11 +++++++++++
 security/integrity/ima/ima.h        |  1 +
 security/integrity/ima/ima_main.c   |  9 +++++++++
 security/integrity/ima/ima_policy.c | 27 ++++++++++++++++++++-------
 4 files changed, 41 insertions(+), 7 deletions(-)

-- 
2.7.5