mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-26 05:34:13 +08:00
20510f2f4e
Convert LSM into a static interface, as the ability to unload a security module is not required by in-tree users and potentially complicates the overall security architecture. Needlessly exported LSM symbols have been unexported, to help reduce API abuse. Parameters for the capability and root_plug modules are now specified at boot. The SECURITY_FRAMEWORK_VERSION macro has also been removed. In a nutshell, there is no safe way to unload an LSM. The modular interface is thus unecessary and broken infrastructure. It is used only by out-of-tree modules, which are often binary-only, illegal, abusive of the API and dangerous, e.g. silently re-vectoring SELinux. [akpm@linux-foundation.org: cleanups] [akpm@linux-foundation.org: USB Kconfig fix] [randy.dunlap@oracle.com: fix LSM kernel-doc] Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Chris Wright <chrisw@sous-sol.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Acked-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
100 lines
3.2 KiB
Plaintext
100 lines
3.2 KiB
Plaintext
#
|
|
# Security configuration
|
|
#
|
|
|
|
menu "Security options"
|
|
|
|
config KEYS
|
|
bool "Enable access key retention support"
|
|
help
|
|
This option provides support for retaining authentication tokens and
|
|
access keys in the kernel.
|
|
|
|
It also includes provision of methods by which such keys might be
|
|
associated with a process so that network filesystems, encryption
|
|
support and the like can find them.
|
|
|
|
Furthermore, a special type of key is available that acts as keyring:
|
|
a searchable sequence of keys. Each process is equipped with access
|
|
to five standard keyrings: UID-specific, GID-specific, session,
|
|
process and thread.
|
|
|
|
If you are unsure as to whether this is required, answer N.
|
|
|
|
config KEYS_DEBUG_PROC_KEYS
|
|
bool "Enable the /proc/keys file by which keys may be viewed"
|
|
depends on KEYS
|
|
help
|
|
This option turns on support for the /proc/keys file - through which
|
|
can be listed all the keys on the system that are viewable by the
|
|
reading process.
|
|
|
|
The only keys included in the list are those that grant View
|
|
permission to the reading process whether or not it possesses them.
|
|
Note that LSM security checks are still performed, and may further
|
|
filter out keys that the current process is not authorised to view.
|
|
|
|
Only key attributes are listed here; key payloads are not included in
|
|
the resulting table.
|
|
|
|
If you are unsure as to whether this is required, answer N.
|
|
|
|
config SECURITY
|
|
bool "Enable different security models"
|
|
depends on SYSFS
|
|
help
|
|
This allows you to choose different security modules to be
|
|
configured into your kernel.
|
|
|
|
If this option is not selected, the default Linux security
|
|
model will be used.
|
|
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
config SECURITY_NETWORK
|
|
bool "Socket and Networking Security Hooks"
|
|
depends on SECURITY
|
|
help
|
|
This enables the socket and networking security hooks.
|
|
If enabled, a security module can use these hooks to
|
|
implement socket and networking access controls.
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
config SECURITY_NETWORK_XFRM
|
|
bool "XFRM (IPSec) Networking Security Hooks"
|
|
depends on XFRM && SECURITY_NETWORK
|
|
help
|
|
This enables the XFRM (IPSec) networking security hooks.
|
|
If enabled, a security module can use these hooks to
|
|
implement per-packet access controls based on labels
|
|
derived from IPSec policy. Non-IPSec communications are
|
|
designated as unlabelled, and only sockets authorized
|
|
to communicate unlabelled data can send without using
|
|
IPSec.
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
config SECURITY_CAPABILITIES
|
|
bool "Default Linux Capabilities"
|
|
depends on SECURITY
|
|
help
|
|
This enables the "default" Linux capabilities functionality.
|
|
If you are unsure how to answer this question, answer Y.
|
|
|
|
config SECURITY_ROOTPLUG
|
|
bool "Root Plug Support"
|
|
depends on USB=y && SECURITY
|
|
help
|
|
This is a sample LSM module that should only be used as such.
|
|
It prevents any programs running with egid == 0 if a specific
|
|
USB device is not present in the system.
|
|
|
|
See <http://www.linuxjournal.com/article.php?sid=6279> for
|
|
more information about this module.
|
|
|
|
If you are unsure how to answer this question, answer N.
|
|
|
|
source security/selinux/Kconfig
|
|
|
|
endmenu
|
|
|