From: Nathan Lynch <nathanl@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: ajd@linux.ibm.com, nayna@linux.ibm.com, jmorris@namei.org,
paul@paul-moore.com, gcwilson@linux.ibm.com, serge@hallyn.com
Subject: [PATCH v2 0/2] powerpc/pseries: restrict error injection and DT changes when locked down
Date: Mon, 26 Sep 2022 08:16:41 -0500 [thread overview]
Message-ID: <20220926131643.146502-1-nathanl@linux.ibm.com> (raw)
Add two new lockdown reasons for use in powerpc's pseries platform
code.
The pseries platform allows hardware-level error injection via certain
calls to the RTAS (Run Time Abstraction Services) firmware. ACPI-based
error injection is already restricted in lockdown; this facility
should be restricted for the same reasons.
pseries also allows nearly arbitrary device tree changes via
/proc/powerpc/ofdt. Just as overriding ACPI tables is not allowed
while locked down, so should this facility be restricted.
Changes since v1:
* Move LOCKDOWN_DEVICE_TREE next to LOCKDOWN_ACPI_TABLES.
Nathan Lynch (2):
powerpc/pseries: block untrusted device tree changes when locked down
powerpc/rtas: block error injection when locked down
arch/powerpc/kernel/rtas.c | 25 ++++++++++++++++++++++-
arch/powerpc/platforms/pseries/reconfig.c | 5 +++++
include/linux/security.h | 2 ++
security/security.c | 2 ++
4 files changed, 33 insertions(+), 1 deletion(-)
--
2.37.3
next reply other threads:[~2022-09-26 13:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 13:16 Nathan Lynch [this message]
2022-09-26 13:16 ` [PATCH v2 1/2] powerpc/pseries: block untrusted device tree changes when locked down Nathan Lynch
2022-09-26 22:39 ` Paul Moore
2022-09-28 9:51 ` Andrew Donnellan
2022-09-26 13:16 ` [PATCH v2 2/2] powerpc/rtas: block error injection " Nathan Lynch
2022-09-26 22:41 ` Paul Moore
2022-09-28 10:02 ` Andrew Donnellan
2022-09-28 16:23 ` Nathan Lynch
2022-10-04 13:25 ` [PATCH v2 0/2] powerpc/pseries: restrict error injection and DT changes " Michael Ellerman
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