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authorJames Morris <jmorris@namei.org>2009-10-20 13:48:33 +0900
committerJames Morris <jmorris@namei.org>2009-10-20 14:26:16 +0900
commit3e1c2515acf70448cad1ae3ab835ca80be043d33 (patch)
tree46034a30e83ba406479d9753acdbb0fd76180b2b /security
parentb7f3008ad1d795935551e4dd810b0255a7bfa3c9 (diff)
downloadvexpress-lsk-3e1c2515acf70448cad1ae3ab835ca80be043d33.tar.gz
security: remove root_plug
Remove the root_plug example LSM code. It's unmaintained and increasingly broken in various ways. Made at the 2009 Kernel Summit in Tokyo! Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/Kconfig13
-rw-r--r--security/Makefile1
-rw-r--r--security/commoncap.c2
-rw-r--r--security/root_plug.c90
4 files changed, 1 insertions, 105 deletions
diff --git a/security/Kconfig b/security/Kconfig
index fb363cd81cf..aeea8c2bb59 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -100,19 +100,6 @@ config SECURITY_FILE_CAPABILITIES
If in doubt, answer N.
-config SECURITY_ROOTPLUG
- bool "Root Plug Support"
- depends on USB=y && SECURITY
- help
- This is a sample LSM module that should only be used as such.
- It prevents any programs running with egid == 0 if a specific
- USB device is not present in the system.
-
- See <http://www.linuxjournal.com/article.php?sid=6279> for
- more information about this module.
-
- If you are unsure how to answer this question, answer N.
-
config INTEL_TXT
bool "Enable Intel(R) Trusted Execution Technology (Intel(R) TXT)"
depends on HAVE_INTEL_TXT
diff --git a/security/Makefile b/security/Makefile
index 95ecc06392d..bb44e350c61 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_SECURITY_SELINUX) += selinux/built-in.o
obj-$(CONFIG_SECURITY_SMACK) += smack/built-in.o
obj-$(CONFIG_AUDIT) += lsm_audit.o
obj-$(CONFIG_SECURITY_TOMOYO) += tomoyo/built-in.o
-obj-$(CONFIG_SECURITY_ROOTPLUG) += root_plug.o
obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
# Object integrity file lists
diff --git a/security/commoncap.c b/security/commoncap.c
index fe30751a6cd..45b87af4ae5 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -1,4 +1,4 @@
-/* Common capabilities, needed by capability.o and root_plug.o
+/* Common capabilities, needed by capability.o.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
diff --git a/security/root_plug.c b/security/root_plug.c
deleted file mode 100644
index 2f7ffa67c4d..00000000000
--- a/security/root_plug.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Root Plug sample LSM module
- *
- * Originally written for a Linux Journal.
- *
- * Copyright (C) 2002 Greg Kroah-Hartman <greg@kroah.com>
- *
- * Prevents any programs running with egid == 0 if a specific USB device
- * is not present in the system. Yes, it can be gotten around, but is a
- * nice starting point for people to play with, and learn the LSM
- * interface.
- *
- * If you want to turn this into something with a semblance of security,
- * you need to hook the task_* functions also.
- *
- * See http://www.linuxjournal.com/article.php?sid=6279 for more information
- * about this code.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/security.h>
-#include <linux/usb.h>
-#include <linux/moduleparam.h>
-
-/* default is a generic type of usb to serial converter */
-static int vendor_id = 0x0557;
-static int product_id = 0x2008;
-
-module_param(vendor_id, uint, 0400);
-module_param(product_id, uint, 0400);
-
-/* should we print out debug messages */
-static int debug = 0;
-
-module_param(debug, bool, 0600);
-
-#define MY_NAME "root_plug"
-
-#define root_dbg(fmt, arg...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG "%s: %s: " fmt , \
- MY_NAME , __func__ , \
- ## arg); \
- } while (0)
-
-static int rootplug_bprm_check_security (struct linux_binprm *bprm)
-{
- struct usb_device *dev;
-
- root_dbg("file %s, e_uid = %d, e_gid = %d\n",
- bprm->filename, bprm->cred->euid, bprm->cred->egid);
-
- if (bprm->cred->egid == 0) {
- dev = usb_find_device(vendor_id, product_id);
- if (!dev) {
- root_dbg("e_gid = 0, and device not found, "
- "task not allowed to run...\n");
- return -EPERM;
- }
- usb_put_dev(dev);
- }
-
- return 0;
-}
-
-static struct security_operations rootplug_security_ops = {
- .bprm_check_security = rootplug_bprm_check_security,
-};
-
-static int __init rootplug_init (void)
-{
- /* register ourselves with the security framework */
- if (register_security (&rootplug_security_ops)) {
- printk (KERN_INFO
- "Failure registering Root Plug module with the kernel\n");
- return -EINVAL;
- }
- printk (KERN_INFO "Root Plug module initialized, "
- "vendor_id = %4.4x, product id = %4.4x\n", vendor_id, product_id);
- return 0;
-}
-
-security_initcall (rootplug_init);