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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
1# SPDX-License-Identifier: GPL-2.0-only
2config SECURITY_SELINUX
3 bool "SELinux Support"
4 depends on SECURITY_NETWORK && AUDIT && NET && INET
5 select NETWORK_SECMARK
6 default n
7 help
8 This selects 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 "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_DEVELOP
27 bool "SELinux Development Support"
28 depends on SECURITY_SELINUX
29 default y
30 help
31 This enables the development support option of SELinux,
32 which is useful for experimenting with SELinux and developing
33 policies. If unsure, say Y. With this option enabled, the
34 kernel will start in permissive mode (log everything, deny nothing)
35 unless you specify enforcing=1 on the kernel command line. You
36 can interactively toggle the kernel between enforcing mode and
37 permissive mode (if permitted by the policy) via
38 /sys/fs/selinux/enforce.
39
40config SECURITY_SELINUX_AVC_STATS
41 bool "SELinux AVC Statistics"
42 depends on SECURITY_SELINUX
43 default y
44 help
45 This option collects access vector cache statistics to
46 /sys/fs/selinux/avc/cache_stats, which may be monitored via
47 tools such as avcstat.
48
49config SECURITY_SELINUX_SIDTAB_HASH_BITS
50 int "SELinux sidtab hashtable size"
51 depends on SECURITY_SELINUX
52 range 8 13
53 default 9
54 help
55 This option sets the number of buckets used in the sidtab hashtable
56 to 2^SECURITY_SELINUX_SIDTAB_HASH_BITS buckets. The number of hash
57 collisions may be viewed at /sys/fs/selinux/ss/sidtab_hash_stats. If
58 chain lengths are high (e.g. > 20) then selecting a higher value here
59 will ensure that lookups times are short and stable.
60
61config SECURITY_SELINUX_SID2STR_CACHE_SIZE
62 int "SELinux SID to context string translation cache size"
63 depends on SECURITY_SELINUX
64 default 256
65 help
66 This option defines the size of the internal SID -> context string
67 cache, which improves the performance of context to string
68 conversion. Setting this option to 0 disables the cache completely.
69
70 If unsure, keep the default value.
71
72config SECURITY_SELINUX_DEBUG
73 bool "SELinux kernel debugging support"
74 depends on SECURITY_SELINUX
75 default n
76 help
77 This enables debugging code designed to help SELinux kernel
78 developers, unless you know what this does in the kernel code you
79 should leave this disabled.
80
81 To fine control the messages to be printed enable
82 CONFIG_DYNAMIC_DEBUG and see
83 Documentation/admin-guide/dynamic-debug-howto.rst for additional
84 information.
85
86 Example usage:
87
88 echo -n 'file "security/selinux/*" +p' > \
89 /proc/dynamic_debug/control