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>

1 files changed, 0 insertions, 90 deletions

diff --git a/security/root_plug.c b/security/root_plug.c
deleted file mode 100644
index 2f7ffa67c4d2..000000000000
--- 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);