1# SPDX-License-Identifier: GPL-2.0-only
  2config SECURITY_SELINUX
  3	bool "NSA SELinux Support"
  4	depends on SECURITY_NETWORK && AUDIT && NET && INET
  5	select NETWORK_SECMARK
  6	default n
  7	help
  8	  This selects NSA Security-Enhanced Linux (SELinux).
  9	  You will also need a policy configuration and a labeled filesystem.
 10	  If you are unsure how to answer this question, answer N.
 11
 12config SECURITY_SELINUX_BOOTPARAM
 13	bool "NSA SELinux boot parameter"
 14	depends on SECURITY_SELINUX
 15	default n
 16	help
 17	  This option adds a kernel parameter 'selinux', which allows SELinux
 18	  to be disabled at boot.  If this option is selected, SELinux
 19	  functionality can be disabled with selinux=0 on the kernel
 20	  command line.  The purpose of this option is to allow a single
 21	  kernel image to be distributed with SELinux built in, but not
 22	  necessarily enabled.
 23
 24	  If you are unsure how to answer this question, answer N.
 25
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 26config SECURITY_SELINUX_DISABLE
 27	bool "NSA SELinux runtime disable"
 28	depends on SECURITY_SELINUX
 29	select SECURITY_WRITABLE_HOOKS
 30	default n
 31	help
 32	  This option enables writing to a selinuxfs node 'disable', which
 33	  allows SELinux to be disabled at runtime prior to the policy load.
 34	  SELinux will then remain disabled until the next boot.
 35	  This option is similar to the selinux=0 boot parameter, but is to
 36	  support runtime disabling of SELinux, e.g. from /sbin/init, for
 37	  portability across platforms where boot parameters are difficult
 38	  to employ.
 39
 40	  NOTE: selecting this option will disable the '__ro_after_init'
 41	  kernel hardening feature for security hooks.   Please consider
 42	  using the selinux=0 boot parameter instead of enabling this
 43	  option.
 44
 45	  WARNING: this option is deprecated and will be removed in a future
 46	  kernel release.
 47
 48	  If you are unsure how to answer this question, answer N.
 49
 50config SECURITY_SELINUX_DEVELOP
 51	bool "NSA SELinux Development Support"
 52	depends on SECURITY_SELINUX
 53	default y
 54	help
 55	  This enables the development support option of NSA SELinux,
 56	  which is useful for experimenting with SELinux and developing
 57	  policies.  If unsure, say Y.  With this option enabled, the
 58	  kernel will start in permissive mode (log everything, deny nothing)
 59	  unless you specify enforcing=1 on the kernel command line.  You
 60	  can interactively toggle the kernel between enforcing mode and
 61	  permissive mode (if permitted by the policy) via
 62	  /sys/fs/selinux/enforce.
 63
 64config SECURITY_SELINUX_AVC_STATS
 65	bool "NSA SELinux AVC Statistics"
 66	depends on SECURITY_SELINUX
 67	default y
 68	help
 69	  This option collects access vector cache statistics to
 70	  /sys/fs/selinux/avc/cache_stats, which may be monitored via
 71	  tools such as avcstat.
 72
 73config SECURITY_SELINUX_CHECKREQPROT_VALUE
 74	int "NSA SELinux checkreqprot default value"
 75	depends on SECURITY_SELINUX
 76	range 0 1
 77	default 0
 78	help
 79	  This option sets the default value for the 'checkreqprot' flag
 80	  that determines whether SELinux checks the protection requested
 81	  by the application or the protection that will be applied by the
 82	  kernel (including any implied execute for read-implies-exec) for
 83	  mmap and mprotect calls.  If this option is set to 0 (zero),
 84	  SELinux will default to checking the protection that will be applied
 85	  by the kernel.  If this option is set to 1 (one), SELinux will
 86	  default to checking the protection requested by the application.
 87	  The checkreqprot flag may be changed from the default via the
 88	  'checkreqprot=' boot parameter.  It may also be changed at runtime
 89	  via /sys/fs/selinux/checkreqprot if authorized by policy.
 90
 91	  WARNING: this option is deprecated and will be removed in a future
 92	  kernel release.
 93
 94	  If you are unsure how to answer this question, answer 0.
 95
 96config SECURITY_SELINUX_SIDTAB_HASH_BITS
 97	int "NSA SELinux sidtab hashtable size"
 98	depends on SECURITY_SELINUX
 99	range 8 13
100	default 9
101	help
102	  This option sets the number of buckets used in the sidtab hashtable
103	  to 2^SECURITY_SELINUX_SIDTAB_HASH_BITS buckets. The number of hash
104	  collisions may be viewed at /sys/fs/selinux/ss/sidtab_hash_stats. If
105	  chain lengths are high (e.g. > 20) then selecting a higher value here
106	  will ensure that lookups times are short and stable.
 
 
 
 
 
107
108config SECURITY_SELINUX_SID2STR_CACHE_SIZE
109	int "NSA SELinux SID to context string translation cache size"
110	depends on SECURITY_SELINUX
111	default 256
112	help
113	  This option defines the size of the internal SID -> context string
114	  cache, which improves the performance of context to string
115	  conversion.  Setting this option to 0 disables the cache completely.
 
 
 
 
 
 
 
 
 
 
 
 
116
117	  If unsure, keep the default value.

 
  1config SECURITY_SELINUX
  2	bool "NSA SELinux Support"
  3	depends on SECURITY_NETWORK && AUDIT && NET && INET
  4	select NETWORK_SECMARK
  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.
  9	  If you are unsure how to answer this question, answer N.
 10
 11config 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
 25config 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
 40config 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
 55config 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
 68config 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
 77config SECURITY_SELINUX_CHECKREQPROT_VALUE
 78	int "NSA SELinux checkreqprot default value"
 79	depends on SECURITY_SELINUX
 80	range 0 1
 81	default 1
 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
 95	  If you are unsure how to answer this question, answer 1.
 
 96
 97config 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
110	  and set the value via the next option. For Fedora Core 5 and later,
111	  do not enable this option.
112
113	  If you are unsure how to answer this question, answer N.
114
115config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
116	int "NSA SELinux maximum supported policy format version value"
117	depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
118	range 15 23
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