1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 config SECURITY_SELINUX 2 config SECURITY_SELINUX
3 bool "SELinux Support" !! 3 bool "NSA SELinux Support"
4 depends on SECURITY_NETWORK && AUDIT & 4 depends on SECURITY_NETWORK && AUDIT && NET && INET
5 select NETWORK_SECMARK 5 select NETWORK_SECMARK
6 default n 6 default n
7 help 7 help
8 This selects Security-Enhanced Linux !! 8 This selects NSA Security-Enhanced Linux (SELinux).
9 You will also need a policy configur 9 You will also need a policy configuration and a labeled filesystem.
10 If you are unsure how to answer this 10 If you are unsure how to answer this question, answer N.
11 11
12 config SECURITY_SELINUX_BOOTPARAM 12 config SECURITY_SELINUX_BOOTPARAM
13 bool "SELinux boot parameter" !! 13 bool "NSA SELinux boot parameter"
14 depends on SECURITY_SELINUX 14 depends on SECURITY_SELINUX
15 default n 15 default n
16 help 16 help
17 This option adds a kernel parameter 17 This option adds a kernel parameter 'selinux', which allows SELinux
18 to be disabled at boot. If this opt 18 to be disabled at boot. If this option is selected, SELinux
19 functionality can be disabled with s 19 functionality can be disabled with selinux=0 on the kernel
20 command line. The purpose of this o 20 command line. The purpose of this option is to allow a single
21 kernel image to be distributed with 21 kernel image to be distributed with SELinux built in, but not
22 necessarily enabled. 22 necessarily enabled.
23 23
24 If you are unsure how to answer this 24 If you are unsure how to answer this question, answer N.
25 25
>> 26 config 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
26 config SECURITY_SELINUX_DEVELOP 50 config SECURITY_SELINUX_DEVELOP
27 bool "SELinux Development Support" !! 51 bool "NSA SELinux Development Support"
28 depends on SECURITY_SELINUX 52 depends on SECURITY_SELINUX
29 default y 53 default y
30 help 54 help
31 This enables the development support !! 55 This enables the development support option of NSA SELinux,
32 which is useful for experimenting wi 56 which is useful for experimenting with SELinux and developing
33 policies. If unsure, say Y. With t 57 policies. If unsure, say Y. With this option enabled, the
34 kernel will start in permissive mode 58 kernel will start in permissive mode (log everything, deny nothing)
35 unless you specify enforcing=1 on th 59 unless you specify enforcing=1 on the kernel command line. You
36 can interactively toggle the kernel 60 can interactively toggle the kernel between enforcing mode and
37 permissive mode (if permitted by the 61 permissive mode (if permitted by the policy) via
38 /sys/fs/selinux/enforce. 62 /sys/fs/selinux/enforce.
39 63
40 config SECURITY_SELINUX_AVC_STATS 64 config SECURITY_SELINUX_AVC_STATS
41 bool "SELinux AVC Statistics" !! 65 bool "NSA SELinux AVC Statistics"
42 depends on SECURITY_SELINUX 66 depends on SECURITY_SELINUX
43 default y 67 default y
44 help 68 help
45 This option collects access vector c 69 This option collects access vector cache statistics to
46 /sys/fs/selinux/avc/cache_stats, whi 70 /sys/fs/selinux/avc/cache_stats, which may be monitored via
47 tools such as avcstat. 71 tools such as avcstat.
48 72
>> 73 config 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 If you are unsure how to answer this question, answer 0.
>> 92
49 config SECURITY_SELINUX_SIDTAB_HASH_BITS 93 config SECURITY_SELINUX_SIDTAB_HASH_BITS
50 int "SELinux sidtab hashtable size" !! 94 int "NSA SELinux sidtab hashtable size"
51 depends on SECURITY_SELINUX 95 depends on SECURITY_SELINUX
52 range 8 13 96 range 8 13
53 default 9 97 default 9
54 help 98 help
55 This option sets the number of bucke 99 This option sets the number of buckets used in the sidtab hashtable
56 to 2^SECURITY_SELINUX_SIDTAB_HASH_BI 100 to 2^SECURITY_SELINUX_SIDTAB_HASH_BITS buckets. The number of hash
57 collisions may be viewed at /sys/fs/ 101 collisions may be viewed at /sys/fs/selinux/ss/sidtab_hash_stats. If
58 chain lengths are high (e.g. > 20) t 102 chain lengths are high (e.g. > 20) then selecting a higher value here
59 will ensure that lookups times are s 103 will ensure that lookups times are short and stable.
60 104
61 config SECURITY_SELINUX_SID2STR_CACHE_SIZE 105 config SECURITY_SELINUX_SID2STR_CACHE_SIZE
62 int "SELinux SID to context string tra !! 106 int "NSA SELinux SID to context string translation cache size"
63 depends on SECURITY_SELINUX 107 depends on SECURITY_SELINUX
64 default 256 108 default 256
65 help 109 help
66 This option defines the size of the 110 This option defines the size of the internal SID -> context string
67 cache, which improves the performanc 111 cache, which improves the performance of context to string
68 conversion. Setting this option to 112 conversion. Setting this option to 0 disables the cache completely.
69 113
70 If unsure, keep the default value. 114 If unsure, keep the default value.
71 <<
72 config 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 <<
78 developers, unless you know what thi <<
79 should leave this disabled. <<
80 <<
81 To fine control the messages to be p <<
82 CONFIG_DYNAMIC_DEBUG and see <<
83 Documentation/admin-guide/dynamic-de <<
84 information. <<
85 <<
86 Example usage: <<
87 <<
88 echo -n 'file "security/selinu <<
89 /proc/dynamic_debug/co <<
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