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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
#
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# Security configuration
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#
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menu "Security options"
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config KEYS
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bool "Enable access key retention support"
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help
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This option provides support for retaining authentication tokens and
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access keys in the kernel.
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It also includes provision of methods by which such keys might be
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associated with a process so that network filesystems, encryption
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support and the like can find them.
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Furthermore, a special type of key is available that acts as keyring:
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a searchable sequence of keys. Each process is equipped with access
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to five standard keyrings: UID-specific, GID-specific, session,
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process and thread.
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If you are unsure as to whether this is required, answer N.
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config KEYS_DEBUG_PROC_KEYS
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bool "Enable the /proc/keys file by which keys may be viewed"
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depends on KEYS
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help
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This option turns on support for the /proc/keys file - through which
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can be listed all the keys on the system that are viewable by the
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reading process.
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The only keys included in the list are those that grant View
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permission to the reading process whether or not it possesses them.
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Note that LSM security checks are still performed, and may further
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filter out keys that the current process is not authorised to view.
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Only key attributes are listed here; key payloads are not included in
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the resulting table.
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If you are unsure as to whether this is required, answer N.
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config SECURITY
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bool "Enable different security models"
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depends on SYSFS
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help
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This allows you to choose different security modules to be
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configured into your kernel.
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If this option is not selected, the default Linux security
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model will be used.
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If you are unsure how to answer this question, answer N.
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config SECURITY_NETWORK
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bool "Socket and Networking Security Hooks"
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depends on SECURITY
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help
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This enables the socket and networking security hooks.
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If enabled, a security module can use these hooks to
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implement socket and networking access controls.
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If you are unsure how to answer this question, answer N.
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config SECURITY_NETWORK_XFRM
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bool "XFRM (IPSec) Networking Security Hooks"
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depends on XFRM && SECURITY_NETWORK
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help
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This enables the XFRM (IPSec) networking security hooks.
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If enabled, a security module can use these hooks to
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implement per-packet access controls based on labels
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derived from IPSec policy. Non-IPSec communications are
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designated as unlabelled, and only sockets authorized
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to communicate unlabelled data can send without using
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IPSec.
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If you are unsure how to answer this question, answer N.
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config SECURITY_CAPABILITIES
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bool "Default Linux Capabilities"
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depends on SECURITY
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help
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This enables the "default" Linux capabilities functionality.
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If you are unsure how to answer this question, answer Y.
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config SECURITY_ROOTPLUG
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bool "Root Plug Support"
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depends on USB=y && SECURITY
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help
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This is a sample LSM module that should only be used as such.
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It prevents any programs running with egid == 0 if a specific
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USB device is not present in the system.
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See <http://www.linuxjournal.com/article.php?sid=6279> for
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more information about this module.
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If you are unsure how to answer this question, answer N.
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source security/selinux/Kconfig
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endmenu
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