security/selinux/Kconfig

   1 config 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
  11 config 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
  25 config 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
  40 config 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
  55 config 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
  68 config 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
  77 config 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
  97 config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
  98         bool "NSA SELinux enable new secmark network controls by default"
  99         depends on SECURITY_SELINUX
 100         default n
 101         help
 102           This option determines whether the new secmark-based network
 103           controls will be enabled by default.  If not, the old internal
 104           per-packet controls will be enabled by default, preserving
 105           old behavior.
 106
 107           If you enable the new controls, you will need updated
 108           SELinux userspace libraries, tools and policy.  Typically,
 109           your distribution will provide these and enable the new controls
 110           in the kernel they also distribute.
 111
 112           Note that this option can be overridden at boot with the
 113           selinux_compat_net parameter, and after boot via
 114           /selinux/compat_net.  See Documentation/kernel-parameters.txt
 115           for details on this parameter.
 116
 117           If you enable the new network controls, you will likely
 118           also require the SECMARK and CONNSECMARK targets, as
 119           well as any conntrack helpers for protocols which you
 120           wish to control.
 121
 122           If you are unsure what to do here, select N.
 123
 124 config SECURITY_SELINUX_POLICYDB_VERSION_MAX
 125         bool "NSA SELinux maximum supported policy format version"
 126         depends on SECURITY_SELINUX
 127         default n
 128         help
 129           This option enables the maximum policy format version supported
 130           by SELinux to be set to a particular value.  This value is reported
 131           to userspace via /selinux/policyvers and used at policy load time.
 132           It can be adjusted downward to support legacy userland (init) that
 133           does not correctly handle kernels that support newer policy versions.
 134
 135           Examples:
 136           For the Fedora Core 3 or 4 Linux distributions, enable this option
 137           and set the value via the next option. For Fedora Core 5 and later,
 138           do not enable this option.
 139
 140           If you are unsure how to answer this question, answer N.
 141
 142 config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
 143         int "NSA SELinux maximum supported policy format version value"
 144         depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
 145         range 15 23
 146         default 19
 147         help
 148           This option sets the value for the maximum policy format version
 149           supported by SELinux.
 150
 151           Examples:
 152           For Fedora Core 3, use 18.
 153           For Fedora Core 4, use 19.
 154
 155           If you are unsure how to answer this question, look for the
 156           policy format version supported by your policy toolchain, by
 157           running 'checkpolicy -V'. Or look at what policy you have
 158           installed under /etc/selinux/$SELINUXTYPE/policy, where
 159           SELINUXTYPE is defined in your /etc/selinux/config.
 160