xref: /openbmc/linux/security/selinux/Kconfig (revision f3539c12)
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 0
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 0.
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
134