LXR linux/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        select SECURITY_WRITABLE_HOOKS
  44        default n
  45        help
  46          This option enables writing to a selinuxfs node 'disable', which
  47          allows SELinux to be disabled at runtime prior to the policy load.
  48          SELinux will then remain disabled until the next boot.
  49          This option is similar to the selinux=0 boot parameter, but is to
  50          support runtime disabling of SELinux, e.g. from /sbin/init, for
  51          portability across platforms where boot parameters are difficult
  52          to employ.
  53
  54          NOTE: selecting this option will disable the '__ro_after_init'
  55          kernel hardening feature for security hooks.   Please consider
  56          using the selinux=0 boot parameter instead of enabling this
  57          option.
  58
  59          If you are unsure how to answer this question, answer N.
  60
  61config SECURITY_SELINUX_DEVELOP
  62        bool "NSA SELinux Development Support"
  63        depends on SECURITY_SELINUX
  64        default y
  65        help
  66          This enables the development support option of NSA SELinux,
  67          which is useful for experimenting with SELinux and developing
  68          policies.  If unsure, say Y.  With this option enabled, the
  69          kernel will start in permissive mode (log everything, deny nothing)
  70          unless you specify enforcing=1 on the kernel command line.  You
  71          can interactively toggle the kernel between enforcing mode and
  72          permissive mode (if permitted by the policy) via /selinux/enforce.
  73
  74config SECURITY_SELINUX_AVC_STATS
  75        bool "NSA SELinux AVC Statistics"
  76        depends on SECURITY_SELINUX
  77        default y
  78        help
  79          This option collects access vector cache statistics to
  80          /selinux/avc/cache_stats, which may be monitored via
  81          tools such as avcstat.
  82
  83config SECURITY_SELINUX_CHECKREQPROT_VALUE
  84        int "NSA SELinux checkreqprot default value"
  85        depends on SECURITY_SELINUX
  86        range 0 1
  87        default 0
  88        help
  89          This option sets the default value for the 'checkreqprot' flag
  90          that determines whether SELinux checks the protection requested
  91          by the application or the protection that will be applied by the
  92          kernel (including any implied execute for read-implies-exec) for
  93          mmap and mprotect calls.  If this option is set to 0 (zero),
  94          SELinux will default to checking the protection that will be applied
  95          by the kernel.  If this option is set to 1 (one), SELinux will
  96          default to checking the protection requested by the application.
  97          The checkreqprot flag may be changed from the default via the
  98          'checkreqprot=' boot parameter.  It may also be changed at runtime
  99          via /selinux/checkreqprot if authorized by policy.
 100
 101          If you are unsure how to answer this question, answer 0.
 102