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           You can obtain the policy compiler (checkpolicy), the utility for
  10           labeling filesystems (setfiles), and an example policy configuration
  11           from <http://www.nsa.gov/selinux/>.
  12           If you are unsure how to answer this question, answer N.
  13
  14 config SECURITY_SELINUX_BOOTPARAM
  15         bool "NSA SELinux boot parameter"
  16         depends on SECURITY_SELINUX
  17         default n
  18         help
  19           This option adds a kernel parameter 'selinux', which allows SELinux
  20           to be disabled at boot.  If this option is selected, SELinux
  21           functionality can be disabled with selinux=0 on the kernel
  22           command line.  The purpose of this option is to allow a single
  23           kernel image to be distributed with SELinux built in, but not
  24           necessarily enabled.
  25
  26           If you are unsure how to answer this question, answer N.
  27
  28 config SECURITY_SELINUX_BOOTPARAM_VALUE
  29         int "NSA SELinux boot parameter default value"
  30         depends on SECURITY_SELINUX_BOOTPARAM
  31         range 0 1
  32         default 1
  33         help
  34           This option sets the default value for the kernel parameter
  35           'selinux', which allows SELinux to be disabled at boot.  If this
  36           option is set to 0 (zero), the SELinux kernel parameter will
  37           default to 0, disabling SELinux at bootup.  If this option is
  38           set to 1 (one), the SELinux kernel parameter will default to 1,
  39           enabling SELinux at bootup.
  40
  41           If you are unsure how to answer this question, answer 1.
  42
  43 config SECURITY_SELINUX_DISABLE
  44         bool "NSA SELinux runtime disable"
  45         depends on SECURITY_SELINUX
  46         default n
  47         help
  48           This option enables writing to a selinuxfs node 'disable', which
  49           allows SELinux to be disabled at runtime prior to the policy load.
  50           SELinux will then remain disabled until the next boot.
  51           This option is similar to the selinux=0 boot parameter, but is to
  52           support runtime disabling of SELinux, e.g. from /sbin/init, for
  53           portability across platforms where boot parameters are difficult
  54           to employ.
  55
  56           If you are unsure how to answer this question, answer N.
  57
  58 config SECURITY_SELINUX_DEVELOP
  59         bool "NSA SELinux Development Support"
  60         depends on SECURITY_SELINUX
  61         default y
  62         help
  63           This enables the development support option of NSA SELinux,
  64           which is useful for experimenting with SELinux and developing
  65           policies.  If unsure, say Y.  With this option enabled, the
  66           kernel will start in permissive mode (log everything, deny nothing)
  67           unless you specify enforcing=1 on the kernel command line.  You
  68           can interactively toggle the kernel between enforcing mode and
  69           permissive mode (if permitted by the policy) via /selinux/enforce.
  70
  71 config SECURITY_SELINUX_AVC_STATS
  72         bool "NSA SELinux AVC Statistics"
  73         depends on SECURITY_SELINUX
  74         default y
  75         help
  76           This option collects access vector cache statistics to
  77           /selinux/avc/cache_stats, which may be monitored via
  78           tools such as avcstat.
  79
  80 config SECURITY_SELINUX_CHECKREQPROT_VALUE
  81         int "NSA SELinux checkreqprot default value"
  82         depends on SECURITY_SELINUX
  83         range 0 1
  84         default 1
  85         help
  86           This option sets the default value for the 'checkreqprot' flag
  87           that determines whether SELinux checks the protection requested
  88           by the application or the protection that will be applied by the
  89           kernel (including any implied execute for read-implies-exec) for
  90           mmap and mprotect calls.  If this option is set to 0 (zero),
  91           SELinux will default to checking the protection that will be applied
  92           by the kernel.  If this option is set to 1 (one), SELinux will
  93           default to checking the protection requested by the application.
  94           The checkreqprot flag may be changed from the default via the
  95           'checkreqprot=' boot parameter.  It may also be changed at runtime
  96           via /selinux/checkreqprot if authorized by policy.
  97
  98           If you are unsure how to answer this question, answer 1.
  99
 100 config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
 101         bool "NSA SELinux enable new secmark network controls by default"
 102         depends on SECURITY_SELINUX
 103         default n
 104         help
 105           This option determines whether the new secmark-based network
 106           controls will be enabled by default.  If not, the old internal
 107           per-packet controls will be enabled by default, preserving
 108           old behavior.
 109
 110           If you enable the new controls, you will need updated
 111           SELinux userspace libraries, tools and policy.  Typically,
 112           your distribution will provide these and enable the new controls
 113           in the kernel they also distribute.
 114
 115           Note that this option can be overridden at boot with the
 116           selinux_compat_net parameter, and after boot via
 117           /selinux/compat_net.  See Documentation/kernel-parameters.txt
 118           for details on this parameter.
 119
 120           If you enable the new network controls, you will likely
 121           also require the SECMARK and CONNSECMARK targets, as
 122           well as any conntrack helpers for protocols which you
 123           wish to control.
 124
 125           If you are unsure what to do here, select N.
 126
 127 config SECURITY_SELINUX_POLICYDB_VERSION_MAX
 128         bool "NSA SELinux maximum supported policy format version"
 129         depends on SECURITY_SELINUX
 130         default n
 131         help
 132           This option enables the maximum policy format version supported
 133           by SELinux to be set to a particular value.  This value is reported
 134           to userspace via /selinux/policyvers and used at policy load time.
 135           It can be adjusted downward to support legacy userland (init) that
 136           does not correctly handle kernels that support newer policy versions.
 137
 138           Examples:
 139           For the Fedora Core 3 or 4 Linux distributions, enable this option
 140           and set the value via the next option. For Fedora Core 5 and later,
 141           do not enable this option.
 142
 143           If you are unsure how to answer this question, answer N.
 144
 145 config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
 146         int "NSA SELinux maximum supported policy format version value"
 147         depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
 148         range 15 22
 149         default 19
 150         help
 151           This option sets the value for the maximum policy format version
 152           supported by SELinux.
 153
 154           Examples:
 155           For Fedora Core 3, use 18.
 156           For Fedora Core 4, use 19.
 157
 158           If you are unsure how to answer this question, look for the
 159           policy format version supported by your policy toolchain, by
 160           running 'checkpolicy -V'. Or look at what policy you have
 161           installed under /etc/selinux/$SELINUXTYPE/policy, where
 162           SELINUXTYPE is defined in your /etc/selinux/config.
 163