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This patch is the first step towards removing the old "compat_net" code from the kernel. Secmark, the "compat_net" replacement was first introduced in 2.6.18 (September 2006) and the major Linux distributions with SELinux support have transitioned to Secmark so it is time to start deprecating the "compat_net" mechanism. Testing a patched version of 2.6.28-rc6 with the initial release of Fedora Core 5 did not show any problems when running in enforcing mode. This patch adds an entry to the feature-removal-schedule.txt file and removes the SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT configuration option, forcing Secmark on by default although it can still be disabled at runtime. The patch also makes the Secmark permission checks "dynamic" in the sense that they are only executed when Secmark is configured; this should help prevent problems with older distributions that have not yet migrated to Secmark. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org>
134 lines
5.1 KiB
Plaintext
134 lines
5.1 KiB
Plaintext
config SECURITY_SELINUX
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bool "NSA SELinux Support"
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depends on SECURITY_NETWORK && AUDIT && NET && INET
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select NETWORK_SECMARK
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default n
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help
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This selects NSA Security-Enhanced Linux (SELinux).
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You will also need a policy configuration and a labeled filesystem.
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If you are unsure how to answer this question, answer N.
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config SECURITY_SELINUX_BOOTPARAM
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bool "NSA SELinux boot parameter"
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depends on SECURITY_SELINUX
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default n
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help
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This option adds a kernel parameter 'selinux', which allows SELinux
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to be disabled at boot. If this option is selected, SELinux
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functionality can be disabled with selinux=0 on the kernel
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command line. The purpose of this option is to allow a single
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kernel image to be distributed with SELinux built in, but not
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necessarily enabled.
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If you are unsure how to answer this question, answer N.
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config SECURITY_SELINUX_BOOTPARAM_VALUE
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int "NSA SELinux boot parameter default value"
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depends on SECURITY_SELINUX_BOOTPARAM
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range 0 1
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default 1
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help
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This option sets the default value for the kernel parameter
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'selinux', which allows SELinux to be disabled at boot. If this
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option is set to 0 (zero), the SELinux kernel parameter will
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default to 0, disabling SELinux at bootup. If this option is
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set to 1 (one), the SELinux kernel parameter will default to 1,
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enabling SELinux at bootup.
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If you are unsure how to answer this question, answer 1.
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config SECURITY_SELINUX_DISABLE
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bool "NSA SELinux runtime disable"
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depends on SECURITY_SELINUX
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default n
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help
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This option enables writing to a selinuxfs node 'disable', which
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allows SELinux to be disabled at runtime prior to the policy load.
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SELinux will then remain disabled until the next boot.
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This option is similar to the selinux=0 boot parameter, but is to
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support runtime disabling of SELinux, e.g. from /sbin/init, for
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portability across platforms where boot parameters are difficult
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to employ.
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If you are unsure how to answer this question, answer N.
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config SECURITY_SELINUX_DEVELOP
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bool "NSA SELinux Development Support"
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depends on SECURITY_SELINUX
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default y
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help
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This enables the development support option of NSA SELinux,
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which is useful for experimenting with SELinux and developing
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policies. If unsure, say Y. With this option enabled, the
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kernel will start in permissive mode (log everything, deny nothing)
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unless you specify enforcing=1 on the kernel command line. You
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can interactively toggle the kernel between enforcing mode and
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permissive mode (if permitted by the policy) via /selinux/enforce.
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config SECURITY_SELINUX_AVC_STATS
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bool "NSA SELinux AVC Statistics"
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depends on SECURITY_SELINUX
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default y
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help
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This option collects access vector cache statistics to
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/selinux/avc/cache_stats, which may be monitored via
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tools such as avcstat.
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config SECURITY_SELINUX_CHECKREQPROT_VALUE
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int "NSA SELinux checkreqprot default value"
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depends on SECURITY_SELINUX
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range 0 1
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default 1
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help
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This option sets the default value for the 'checkreqprot' flag
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that determines whether SELinux checks the protection requested
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by the application or the protection that will be applied by the
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kernel (including any implied execute for read-implies-exec) for
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mmap and mprotect calls. If this option is set to 0 (zero),
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SELinux will default to checking the protection that will be applied
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by the kernel. If this option is set to 1 (one), SELinux will
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default to checking the protection requested by the application.
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The checkreqprot flag may be changed from the default via the
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'checkreqprot=' boot parameter. It may also be changed at runtime
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via /selinux/checkreqprot if authorized by policy.
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If you are unsure how to answer this question, answer 1.
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config SECURITY_SELINUX_POLICYDB_VERSION_MAX
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bool "NSA SELinux maximum supported policy format version"
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depends on SECURITY_SELINUX
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default n
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help
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This option enables the maximum policy format version supported
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by SELinux to be set to a particular value. This value is reported
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to userspace via /selinux/policyvers and used at policy load time.
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It can be adjusted downward to support legacy userland (init) that
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does not correctly handle kernels that support newer policy versions.
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Examples:
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For the Fedora Core 3 or 4 Linux distributions, enable this option
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and set the value via the next option. For Fedora Core 5 and later,
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do not enable this option.
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If you are unsure how to answer this question, answer N.
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config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
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int "NSA SELinux maximum supported policy format version value"
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depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
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range 15 23
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default 19
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help
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This option sets the value for the maximum policy format version
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supported by SELinux.
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Examples:
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For Fedora Core 3, use 18.
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For Fedora Core 4, use 19.
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If you are unsure how to answer this question, look for the
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policy format version supported by your policy toolchain, by
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running 'checkpolicy -V'. Or look at what policy you have
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installed under /etc/selinux/$SELINUXTYPE/policy, where
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SELINUXTYPE is defined in your /etc/selinux/config.
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