[linux.git] / security / selinux / Kconfig

config SECURITY_SELINUX
	bool "NSA SELinux Support"
	depends on SECURITY_NETWORK && AUDIT && NET && INET
	select NETWORK_SECMARK
	default n
	help
	  This selects NSA Security-Enhanced Linux (SELinux).
	  You will also need a policy configuration and a labeled filesystem.
	  If you are unsure how to answer this question, answer N.

config SECURITY_SELINUX_BOOTPARAM
	bool "NSA SELinux boot parameter"
	depends on SECURITY_SELINUX
	default n
	help
	  This option adds a kernel parameter 'selinux', which allows SELinux
	  to be disabled at boot.  If this option is selected, SELinux
	  functionality can be disabled with selinux=0 on the kernel
	  command line.  The purpose of this option is to allow a single
	  kernel image to be distributed with SELinux built in, but not
	  necessarily enabled.

	  If you are unsure how to answer this question, answer N.

config SECURITY_SELINUX_BOOTPARAM_VALUE
	int "NSA SELinux boot parameter default value"
	depends on SECURITY_SELINUX_BOOTPARAM
	range 0 1
	default 1
	help
	  This option sets the default value for the kernel parameter
	  'selinux', which allows SELinux to be disabled at boot.  If this
	  option is set to 0 (zero), the SELinux kernel parameter will
	  default to 0, disabling SELinux at bootup.  If this option is
	  set to 1 (one), the SELinux kernel parameter will default to 1,
	  enabling SELinux at bootup.

	  If you are unsure how to answer this question, answer 1.

config SECURITY_SELINUX_DISABLE
	bool "NSA SELinux runtime disable"
	depends on SECURITY_SELINUX
	default n
	help
	  This option enables writing to a selinuxfs node 'disable', which
	  allows SELinux to be disabled at runtime prior to the policy load.
	  SELinux will then remain disabled until the next boot.
	  This option is similar to the selinux=0 boot parameter, but is to
	  support runtime disabling of SELinux, e.g. from /sbin/init, for
	  portability across platforms where boot parameters are difficult
	  to employ.

	  If you are unsure how to answer this question, answer N.

config SECURITY_SELINUX_DEVELOP
	bool "NSA SELinux Development Support"
	depends on SECURITY_SELINUX
	default y
	help
	  This enables the development support option of NSA SELinux,
	  which is useful for experimenting with SELinux and developing
	  policies.  If unsure, say Y.  With this option enabled, the
	  kernel will start in permissive mode (log everything, deny nothing)
	  unless you specify enforcing=1 on the kernel command line.  You
	  can interactively toggle the kernel between enforcing mode and
	  permissive mode (if permitted by the policy) via /selinux/enforce.

config SECURITY_SELINUX_AVC_STATS
	bool "NSA SELinux AVC Statistics"
	depends on SECURITY_SELINUX
	default y
	help
	  This option collects access vector cache statistics to
	  /selinux/avc/cache_stats, which may be monitored via
	  tools such as avcstat.

config SECURITY_SELINUX_CHECKREQPROT_VALUE
	int "NSA SELinux checkreqprot default value"
	depends on SECURITY_SELINUX
	range 0 1
	default 0
	help
	  This option sets the default value for the 'checkreqprot' flag
	  that determines whether SELinux checks the protection requested
	  by the application or the protection that will be applied by the
	  kernel (including any implied execute for read-implies-exec) for
	  mmap and mprotect calls.  If this option is set to 0 (zero),
	  SELinux will default to checking the protection that will be applied
	  by the kernel.  If this option is set to 1 (one), SELinux will
	  default to checking the protection requested by the application.
	  The checkreqprot flag may be changed from the default via the
	  'checkreqprot=' boot parameter.  It may also be changed at runtime
	  via /selinux/checkreqprot if authorized by policy.

	  If you are unsure how to answer this question, answer 0.

config SECURITY_SELINUX_POLICYDB_VERSION_MAX
	bool "NSA SELinux maximum supported policy format version"
	depends on SECURITY_SELINUX
	default n
	help
	  This option enables the maximum policy format version supported
	  by SELinux to be set to a particular value.  This value is reported
	  to userspace via /selinux/policyvers and used at policy load time.
	  It can be adjusted downward to support legacy userland (init) that
	  does not correctly handle kernels that support newer policy versions.

	  Examples:
	  For the Fedora Core 3 or 4 Linux distributions, enable this option
	  and set the value via the next option. For Fedora Core 5 and later,
	  do not enable this option.

	  If you are unsure how to answer this question, answer N.

config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
	int "NSA SELinux maximum supported policy format version value"
	depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
	range 15 23
	default 19
	help
	  This option sets the value for the maximum policy format version
	  supported by SELinux.

	  Examples:
	  For Fedora Core 3, use 18.
	  For Fedora Core 4, use 19.

	  If you are unsure how to answer this question, look for the
	  policy format version supported by your policy toolchain, by
	  running 'checkpolicy -V'. Or look at what policy you have
	  installed under /etc/selinux/$SELINUXTYPE/policy, where
	  SELINUXTYPE is defined in your /etc/selinux/config.
Commit	Line	Data
1da177e4 LT	1	config SECURITY_SELINUX
1da177e4 LT	2	bool "NSA SELinux Support"
99f6d61b	3	depends on SECURITY_NETWORK && AUDIT && NET && INET
4e5ab4cb	4	select NETWORK_SECMARK
1da177e4 LT	5	default n
	6	help
	7	This selects NSA Security-Enhanced Linux (SELinux).
	8	You will also need a policy configuration and a labeled filesystem.
1da177e4 LT	9	If you are unsure how to answer this question, answer N.
	10
	11	config SECURITY_SELINUX_BOOTPARAM
	12	bool "NSA SELinux boot parameter"
	13	depends on SECURITY_SELINUX
	14	default n
	15	help
	16	This option adds a kernel parameter 'selinux', which allows SELinux
	17	to be disabled at boot. If this option is selected, SELinux
	18	functionality can be disabled with selinux=0 on the kernel
	19	command line. The purpose of this option is to allow a single
	20	kernel image to be distributed with SELinux built in, but not
	21	necessarily enabled.
	22
	23	If you are unsure how to answer this question, answer N.
	24
	25	config SECURITY_SELINUX_BOOTPARAM_VALUE
	26	int "NSA SELinux boot parameter default value"
	27	depends on SECURITY_SELINUX_BOOTPARAM
	28	range 0 1
	29	default 1
	30	help
	31	This option sets the default value for the kernel parameter
	32	'selinux', which allows SELinux to be disabled at boot. If this
	33	option is set to 0 (zero), the SELinux kernel parameter will
	34	default to 0, disabling SELinux at bootup. If this option is
	35	set to 1 (one), the SELinux kernel parameter will default to 1,
	36	enabling SELinux at bootup.
	37
	38	If you are unsure how to answer this question, answer 1.
	39
	40	config SECURITY_SELINUX_DISABLE
	41	bool "NSA SELinux runtime disable"
	42	depends on SECURITY_SELINUX
	43	default n
	44	help
	45	This option enables writing to a selinuxfs node 'disable', which
	46	allows SELinux to be disabled at runtime prior to the policy load.
	47	SELinux will then remain disabled until the next boot.
	48	This option is similar to the selinux=0 boot parameter, but is to
	49	support runtime disabling of SELinux, e.g. from /sbin/init, for
	50	portability across platforms where boot parameters are difficult
	51	to employ.
	52
	53	If you are unsure how to answer this question, answer N.
	54
	55	config SECURITY_SELINUX_DEVELOP
	56	bool "NSA SELinux Development Support"
	57	depends on SECURITY_SELINUX
	58	default y
	59	help
	60	This enables the development support option of NSA SELinux,
	61	which is useful for experimenting with SELinux and developing
	62	policies. If unsure, say Y. With this option enabled, the
	63	kernel will start in permissive mode (log everything, deny nothing)
	64	unless you specify enforcing=1 on the kernel command line. You
	65	can interactively toggle the kernel between enforcing mode and
	66	permissive mode (if permitted by the policy) via /selinux/enforce.
	67
	68	config SECURITY_SELINUX_AVC_STATS
	69	bool "NSA SELinux AVC Statistics"
	70	depends on SECURITY_SELINUX
	71	default y
	72	help
73	This option collects access vector cache statistics to
74	/selinux/avc/cache_stats, which may be monitored via
75	tools such as avcstat.
76
77	config SECURITY_SELINUX_CHECKREQPROT_VALUE
78	int "NSA SELinux checkreqprot default value"
79	depends on SECURITY_SELINUX
80	range 0 1
2a35d196	81	default 0
1da177e4 LT	82	help
	83	This option sets the default value for the 'checkreqprot' flag
	84	that determines whether SELinux checks the protection requested
	85	by the application or the protection that will be applied by the
	86	kernel (including any implied execute for read-implies-exec) for
	87	mmap and mprotect calls. If this option is set to 0 (zero),
	88	SELinux will default to checking the protection that will be applied
	89	by the kernel. If this option is set to 1 (one), SELinux will
	90	default to checking the protection requested by the application.
	91	The checkreqprot flag may be changed from the default via the
	92	'checkreqprot=' boot parameter. It may also be changed at runtime
	93	via /selinux/checkreqprot if authorized by policy.
	94
2a35d196	95	If you are unsure how to answer this question, answer 0.
4e5ab4cb	96
016b9bdb SS	97	config SECURITY_SELINUX_POLICYDB_VERSION_MAX
	98	bool "NSA SELinux maximum supported policy format version"
	99	depends on SECURITY_SELINUX
	100	default n
	101	help
	102	This option enables the maximum policy format version supported
	103	by SELinux to be set to a particular value. This value is reported
	104	to userspace via /selinux/policyvers and used at policy load time.
	105	It can be adjusted downward to support legacy userland (init) that
	106	does not correctly handle kernels that support newer policy versions.
	107
	108	Examples:
	109	For the Fedora Core 3 or 4 Linux distributions, enable this option
3dde6ad8	110	and set the value via the next option. For Fedora Core 5 and later,
016b9bdb SS	111	do not enable this option.
	112
	113	If you are unsure how to answer this question, answer N.
	114
	115	config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
	116	int "NSA SELinux maximum supported policy format version value"
	117	depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
64dbf074	118	range 15 23
016b9bdb SS	119	default 19
	120	help
	121	This option sets the value for the maximum policy format version
	122	supported by SELinux.
	123
	124	Examples:
	125	For Fedora Core 3, use 18.
	126	For Fedora Core 4, use 19.
	127
	128	If you are unsure how to answer this question, look for the
	129	policy format version supported by your policy toolchain, by
	130	running 'checkpolicy -V'. Or look at what policy you have
	131	installed under /etc/selinux/$SELINUXTYPE/policy, where
	132	SELINUXTYPE is defined in your /etc/selinux/config.
	133