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| author | James Morris <jmorris@namei.org> | 2007-10-17 08:31:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 17:43:07 +0200 |
| commit | 20510f2f4e2dabb0ff6c13901807627ec9452f98 (patch) | |
| tree | d64b9eeb90d577f7f9688a215c4c6c3c2405188a /security/capability.c | |
| parent | Add section IDs to Documentation/DocBook/filesystems.tmpl (diff) | |
| download | linux-20510f2f4e2dabb0ff6c13901807627ec9452f98.tar.xz linux-20510f2f4e2dabb0ff6c13901807627ec9452f98.zip | |
security: Convert LSM into a static interface
Convert LSM into a static interface, as the ability to unload a security
module is not required by in-tree users and potentially complicates the
overall security architecture.
Needlessly exported LSM symbols have been unexported, to help reduce API
abuse.
Parameters for the capability and root_plug modules are now specified
at boot.
The SECURITY_FRAMEWORK_VERSION macro has also been removed.
In a nutshell, there is no safe way to unload an LSM. The modular interface
is thus unecessary and broken infrastructure. It is used only by out-of-tree
modules, which are often binary-only, illegal, abusive of the API and
dangerous, e.g. silently re-vectoring SELinux.
[akpm@linux-foundation.org: cleanups]
[akpm@linux-foundation.org: USB Kconfig fix]
[randy.dunlap@oracle.com: fix LSM kernel-doc]
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>
Acked-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/capability.c')
| -rw-r--r-- | security/capability.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/security/capability.c b/security/capability.c index 38296a005465..fda6a14cb24d 100644 --- a/security/capability.c +++ b/security/capability.c @@ -8,7 +8,6 @@ * */ -#include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/security.h> @@ -52,7 +51,6 @@ static int secondary; static int capability_disable; module_param_named(disable, capability_disable, int, 0); -MODULE_PARM_DESC(disable, "To disable capabilities module set disable = 1"); static int __init capability_init (void) { @@ -75,26 +73,4 @@ static int __init capability_init (void) return 0; } -static void __exit capability_exit (void) -{ - if (capability_disable) - return; - /* remove ourselves from the security framework */ - if (secondary) { - if (mod_unreg_security (KBUILD_MODNAME, &capability_ops)) - printk (KERN_INFO "Failure unregistering capabilities " - "with primary module.\n"); - return; - } - - if (unregister_security (&capability_ops)) { - printk (KERN_INFO - "Failure unregistering capabilities with the kernel\n"); - } -} - security_initcall (capability_init); -module_exit (capability_exit); - -MODULE_DESCRIPTION("Standard Linux Capabilities Security Module"); -MODULE_LICENSE("GPL"); |