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authorStephen Smalley <sds@tycho.nsa.gov>2006-09-25 23:31:58 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 08:48:52 -0700
commit016b9bdb81d9c9c7800e4e224ade38d8b37669d3 (patch)
tree47335b123973d918a9686cd2647e5e314ed2c1dd /security/selinux
parent9a2f44f01a67a6ecca71515af999895b45a2aeb0 (diff)
[PATCH] selinux: enable configuration of max policy version
Enable configuration of SELinux maximum supported policy version to support legacy userland (init) that does not gracefully handle kernels that support newer policy versions two or more beyond the installed policy, as in FC3 and FC4. [bunk@stusta.de: improve Kconfig help text] Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: James Morris <jmorris@namei.org> Acked-by: Eric Paris <eparis@redhat.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/Kconfig37
-rw-r--r--security/selinux/include/security.h6
2 files changed, 42 insertions, 1 deletions
diff --git a/security/selinux/Kconfig b/security/selinux/Kconfig
index 814ddc42f1f4..5c64c746b062 100644
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
@@ -124,3 +124,40 @@ config SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT
If you are unsure what do do here, select N.
+config SECURITY_SELINUX_POLICYDB_VERSION_MAX
+ bool "NSA SELinux maximum supported policy format version"
+ depends on SECURITY_SELINUX
+ default n
+ help
+ This option enables the maximum policy format version supported
+ by SELinux to be set to a particular value. This value is reported
+ to userspace via /selinux/policyvers and used at policy load time.
+ It can be adjusted downward to support legacy userland (init) that
+ does not correctly handle kernels that support newer policy versions.
+
+ Examples:
+ For the Fedora Core 3 or 4 Linux distributions, enable this option
+ and set the value via the next option. For Fedore Core 5 and later,
+ do not enable this option.
+
+ If you are unsure how to answer this question, answer N.
+
+config SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
+ int "NSA SELinux maximum supported policy format version value"
+ depends on SECURITY_SELINUX_POLICYDB_VERSION_MAX
+ range 15 20
+ default 19
+ help
+ This option sets the value for the maximum policy format version
+ supported by SELinux.
+
+ Examples:
+ For Fedora Core 3, use 18.
+ For Fedora Core 4, use 19.
+
+ If you are unsure how to answer this question, look for the
+ policy format version supported by your policy toolchain, by
+ running 'checkpolicy -V'. Or look at what policy you have
+ installed under /etc/selinux/$SELINUXTYPE/policy, where
+ SELINUXTYPE is defined in your /etc/selinux/config.
+
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 911954a692fa..aa21ca1721af 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -27,7 +27,11 @@
/* Range of policy versions we understand*/
#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
-#define POLICYDB_VERSION_MAX POLICYDB_VERSION_AVTAB
+#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
+#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
+#else
+#define POLICYDB_VERSION_MAX POLICYDB_VERSION_AVTAB
+#endif
extern int selinux_enabled;
extern int selinux_mls_enabled;

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