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 "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 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 "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_DEVELOP 26 config SECURITY_SELINUX_DEVELOP
27 bool "SELinux Development Support" 27 bool "SELinux Development Support"
28 depends on SECURITY_SELINUX 28 depends on SECURITY_SELINUX
29 default y 29 default y
30 help 30 help
31 This enables the development support 31 This enables the development support option of SELinux,
32 which is useful for experimenting wi 32 which is useful for experimenting with SELinux and developing
33 policies. If unsure, say Y. With t 33 policies. If unsure, say Y. With this option enabled, the
34 kernel will start in permissive mode 34 kernel will start in permissive mode (log everything, deny nothing)
35 unless you specify enforcing=1 on th 35 unless you specify enforcing=1 on the kernel command line. You
36 can interactively toggle the kernel 36 can interactively toggle the kernel between enforcing mode and
37 permissive mode (if permitted by the 37 permissive mode (if permitted by the policy) via
38 /sys/fs/selinux/enforce. 38 /sys/fs/selinux/enforce.
39 39
40 config SECURITY_SELINUX_AVC_STATS 40 config SECURITY_SELINUX_AVC_STATS
41 bool "SELinux AVC Statistics" 41 bool "SELinux AVC Statistics"
42 depends on SECURITY_SELINUX 42 depends on SECURITY_SELINUX
43 default y 43 default y
44 help 44 help
45 This option collects access vector c 45 This option collects access vector cache statistics to
46 /sys/fs/selinux/avc/cache_stats, whi 46 /sys/fs/selinux/avc/cache_stats, which may be monitored via
47 tools such as avcstat. 47 tools such as avcstat.
48 48
49 config SECURITY_SELINUX_SIDTAB_HASH_BITS 49 config SECURITY_SELINUX_SIDTAB_HASH_BITS
50 int "SELinux sidtab hashtable size" 50 int "SELinux sidtab hashtable size"
51 depends on SECURITY_SELINUX 51 depends on SECURITY_SELINUX
52 range 8 13 52 range 8 13
53 default 9 53 default 9
54 help 54 help
55 This option sets the number of bucke 55 This option sets the number of buckets used in the sidtab hashtable
56 to 2^SECURITY_SELINUX_SIDTAB_HASH_BI 56 to 2^SECURITY_SELINUX_SIDTAB_HASH_BITS buckets. The number of hash
57 collisions may be viewed at /sys/fs/ 57 collisions may be viewed at /sys/fs/selinux/ss/sidtab_hash_stats. If
58 chain lengths are high (e.g. > 20) t 58 chain lengths are high (e.g. > 20) then selecting a higher value here
59 will ensure that lookups times are s 59 will ensure that lookups times are short and stable.
60 60
61 config SECURITY_SELINUX_SID2STR_CACHE_SIZE 61 config SECURITY_SELINUX_SID2STR_CACHE_SIZE
62 int "SELinux SID to context string tra 62 int "SELinux SID to context string translation cache size"
63 depends on SECURITY_SELINUX 63 depends on SECURITY_SELINUX
64 default 256 64 default 256
65 help 65 help
66 This option defines the size of the 66 This option defines the size of the internal SID -> context string
67 cache, which improves the performanc 67 cache, which improves the performance of context to string
68 conversion. Setting this option to 68 conversion. Setting this option to 0 disables the cache completely.
69 69
70 If unsure, keep the default value. 70 If unsure, keep the default value.
71 71
72 config SECURITY_SELINUX_DEBUG 72 config SECURITY_SELINUX_DEBUG
73 bool "SELinux kernel debugging support 73 bool "SELinux kernel debugging support"
74 depends on SECURITY_SELINUX 74 depends on SECURITY_SELINUX
75 default n 75 default n
76 help 76 help
77 This enables debugging code designed 77 This enables debugging code designed to help SELinux kernel
78 developers, unless you know what thi 78 developers, unless you know what this does in the kernel code you
79 should leave this disabled. 79 should leave this disabled.
80 80
81 To fine control the messages to be p 81 To fine control the messages to be printed enable
82 CONFIG_DYNAMIC_DEBUG and see 82 CONFIG_DYNAMIC_DEBUG and see
83 Documentation/admin-guide/dynamic-de 83 Documentation/admin-guide/dynamic-debug-howto.rst for additional
84 information. 84 information.
85 85
86 Example usage: 86 Example usage:
87 87
88 echo -n 'file "security/selinu 88 echo -n 'file "security/selinux/*" +p' > \
89 /proc/dynamic_debug/co 89 /proc/dynamic_debug/control
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