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 If you are unsure how to answer this question, answer N.
>> 46
26 config SECURITY_SELINUX_DEVELOP 47 config SECURITY_SELINUX_DEVELOP
27 bool "SELinux Development Support" !! 48 bool "NSA SELinux Development Support"
28 depends on SECURITY_SELINUX 49 depends on SECURITY_SELINUX
29 default y 50 default y
30 help 51 help
31 This enables the development support !! 52 This enables the development support option of NSA SELinux,
32 which is useful for experimenting wi 53 which is useful for experimenting with SELinux and developing
33 policies. If unsure, say Y. With t 54 policies. If unsure, say Y. With this option enabled, the
34 kernel will start in permissive mode 55 kernel will start in permissive mode (log everything, deny nothing)
35 unless you specify enforcing=1 on th 56 unless you specify enforcing=1 on the kernel command line. You
36 can interactively toggle the kernel 57 can interactively toggle the kernel between enforcing mode and
37 permissive mode (if permitted by the !! 58 permissive mode (if permitted by the policy) via /selinux/enforce.
38 /sys/fs/selinux/enforce. <<
39 59
40 config SECURITY_SELINUX_AVC_STATS 60 config SECURITY_SELINUX_AVC_STATS
41 bool "SELinux AVC Statistics" !! 61 bool "NSA SELinux AVC Statistics"
42 depends on SECURITY_SELINUX 62 depends on SECURITY_SELINUX
43 default y 63 default y
44 help 64 help
45 This option collects access vector c 65 This option collects access vector cache statistics to
46 /sys/fs/selinux/avc/cache_stats, whi !! 66 /selinux/avc/cache_stats, which may be monitored via
47 tools such as avcstat. 67 tools such as avcstat.
48 68
49 config SECURITY_SELINUX_SIDTAB_HASH_BITS !! 69 config SECURITY_SELINUX_CHECKREQPROT_VALUE
50 int "SELinux sidtab hashtable size" !! 70 int "NSA SELinux checkreqprot default value"
51 depends on SECURITY_SELINUX 71 depends on SECURITY_SELINUX
52 range 8 13 !! 72 range 0 1
53 default 9 !! 73 default 0
54 help 74 help
55 This option sets the number of bucke !! 75 This option sets the default value for the 'checkreqprot' flag
56 to 2^SECURITY_SELINUX_SIDTAB_HASH_BI !! 76 that determines whether SELinux checks the protection requested
57 collisions may be viewed at /sys/fs/ !! 77 by the application or the protection that will be applied by the
58 chain lengths are high (e.g. > 20) t !! 78 kernel (including any implied execute for read-implies-exec) for
59 will ensure that lookups times are s !! 79 mmap and mprotect calls. If this option is set to 0 (zero),
60 !! 80 SELinux will default to checking the protection that will be applied
61 config SECURITY_SELINUX_SID2STR_CACHE_SIZE !! 81 by the kernel. If this option is set to 1 (one), SELinux will
62 int "SELinux SID to context string tra !! 82 default to checking the protection requested by the application.
63 depends on SECURITY_SELINUX !! 83 The checkreqprot flag may be changed from the default via the
64 default 256 !! 84 'checkreqprot=' boot parameter. It may also be changed at runtime
65 help !! 85 via /selinux/checkreqprot if authorized by policy.
66 This option defines the size of the <<
67 cache, which improves the performanc <<
68 conversion. Setting this option to <<
69 <<
70 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 86
88 echo -n 'file "security/selinu !! 87 If you are unsure how to answer this question, answer 0.
89 /proc/dynamic_debug/co <<
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