Root/security/selinux/Kconfig

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
134

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