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| author | James Morris <jmorris@namei.org> | 2007-10-16 23:31:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:43:07 -0700 |
| commit | 20510f2f4e2dabb0ff6c13901807627ec9452f98 (patch) | |
| tree | d64b9eeb90d577f7f9688a215c4c6c3c2405188a /security/root_plug.c | |
| parent | 5c3b447457789374cdb7b03afe2540d48c649a36 (diff) | |
| download | linux-20510f2f4e2dabb0ff6c13901807627ec9452f98.tar.gz linux-20510f2f4e2dabb0ff6c13901807627ec9452f98.tar.bz2 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/root_plug.c')
| -rw-r--r-- | security/root_plug.c | 31 |
1 files changed, 1 insertions, 30 deletions
diff --git a/security/root_plug.c b/security/root_plug.c index 38dd4f3e641f..870f13095bb6 100644 --- a/security/root_plug.c +++ b/security/root_plug.c @@ -22,11 +22,11 @@ * License. */ -#include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/security.h> #include <linux/usb.h> +#include <linux/moduleparam.h> /* flag to keep track of how we were registered */ static int secondary; @@ -36,22 +36,14 @@ static int vendor_id = 0x0557; static int product_id = 0x2008; module_param(vendor_id, uint, 0400); -MODULE_PARM_DESC(vendor_id, "USB Vendor ID of device to look for"); - module_param(product_id, uint, 0400); -MODULE_PARM_DESC(product_id, "USB Product ID of device to look for"); /* should we print out debug messages */ static int debug = 0; module_param(debug, bool, 0600); -MODULE_PARM_DESC(debug, "Debug enabled or not"); -#if defined(CONFIG_SECURITY_ROOTPLUG_MODULE) -#define MY_NAME THIS_MODULE->name -#else #define MY_NAME "root_plug" -#endif #define root_dbg(fmt, arg...) \ do { \ @@ -117,25 +109,4 @@ static int __init rootplug_init (void) return 0; } -static void __exit rootplug_exit (void) -{ - /* remove ourselves from the security framework */ - if (secondary) { - if (mod_unreg_security (MY_NAME, &rootplug_security_ops)) - printk (KERN_INFO "Failure unregistering Root Plug " - " module with primary module.\n"); - } else { - if (unregister_security (&rootplug_security_ops)) { - printk (KERN_INFO "Failure unregistering Root Plug " - "module with the kernel\n"); - } - } - printk (KERN_INFO "Root Plug module removed\n"); -} - security_initcall (rootplug_init); -module_exit (rootplug_exit); - -MODULE_DESCRIPTION("Root Plug sample LSM module, written for Linux Journal article"); -MODULE_LICENSE("GPL"); - |