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doc: ReSTify LoadPin.txt

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Adjusts for ReST markup and moves under LSM admin guide.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Kees Cook 2017-05-13 04:51:48 -07:00 committed by Jonathan Corbet
parent 90bb766440
commit 30da4f77aa
3 changed files with 10 additions and 4 deletions
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12
Documentation/security/LoadPin.txt → Documentation/admin-guide/LSM/LoadPin.rst
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@ -1,3 +1,7 @@
=======
LoadPin
=======
LoadPin is a Linux Security Module that ensures all kernel-loaded files
(modules, firmware, etc) all originate from the same filesystem, with
the expectation that such a filesystem is backed by a read-only device
@ -5,13 +9,13 @@ such as dm-verity or CDROM. This allows systems that have a verified
and/or unchangeable filesystem to enforce module and firmware loading
restrictions without needing to sign the files individually.
The LSM is selectable at build-time with CONFIG_SECURITY_LOADPIN, and
The LSM is selectable at build-time with ``CONFIG_SECURITY_LOADPIN``, and
can be controlled at boot-time with the kernel command line option
"loadpin.enabled". By default, it is enabled, but can be disabled at
boot ("loadpin.enabled=0").
"``loadpin.enabled``". By default, it is enabled, but can be disabled at
boot ("``loadpin.enabled=0``").
LoadPin starts pinning when it sees the first file loaded. If the
block device backing the filesystem is not read-only, a sysctl is
created to toggle pinning: /proc/sys/kernel/loadpin/enabled. (Having
created to toggle pinning: ``/proc/sys/kernel/loadpin/enabled``. (Having
a mutable filesystem means pinning is mutable too, but having the
sysctl allows for easy testing on systems with a mutable filesystem.)

1
Documentation/admin-guide/LSM/index.rst
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@ -34,6 +34,7 @@ the one "major" module (e.g. SELinux) if there is one configured.
:maxdepth: 1
apparmor
LoadPin
SELinux
tomoyo
Yama

1
MAINTAINERS
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@ -11567,6 +11567,7 @@ M: Kees Cook <keescook@chromium.org>
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git lsm/loadpin
S: Supported
F: security/loadpin/
F: Documentation/admin-guide/LSM/LoadPin.rst
YAMA SECURITY MODULE
M: Kees Cook <keescook@chromium.org>