trunk/ccs-patch/ccs-patch-2.4.34.txt

diff -ubBpEr linux-2.4.34/Documentation/Configure.help linux-2.4.34-ccs/Documentation/Configure.help
--- linux-2.4.34/Documentation/Configure.help   2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/Documentation/Configure.help       2007-03-08 16:32:35.000000000 +0900
@@ -29075,6 +29075,222 @@ CONFIG_SOUND_WM97XX
   
   If unsure, say N.
 
+CONFIG_SAKURA
+  Say Y here to support the Domain-Free Mandatory Access Control.
+
+  SAKURA stands for
+  "Security Advancement Know-how Upon Read-only Approach".
+  As the name shows, SAKURA was originally a methodology to make
+  root fs read-only to avoid tampering the system files.
+  But now, SAKURA is not only a methodology but also a kernel patch
+  that improves the system security with less effort.
+
+  SAKURA can restrict operations that affect systemwide.
+
+CONFIG_SAKURA_RESTRICT_MOUNT
+  This option allows you to restrict combinations of
+  (type, device, dir) that the system can mount.
+
+  For example, the WWW contents are stored at /var/www directory
+  in a HDD, if tmpfs is mounted on /var/www by an attacker,
+  the WWW contents will be hidden.
+  You can prevent the attacker from mounting tmpfs on /var/www
+  with this option.
+
+CONFIG_SAKURA_RESTRICT_CHROOT
+  This option allows you to restrict directories
+  that the system can chroot to.
+
+  If an attacker can chroot to arbitrary directories,
+  the attacker can create a directory tree with malicious programs
+  under a writable directory
+  and execute them after chroot to that directory.
+  You can prevent the attacker with this option.
+
+  This option becomes more powerful if either root fs is read-only
+  or mandatory file access controls are enforced.
+
+CONFIG_SAKURA_RESTRICT_UNMOUNT
+  This option allows you to reject unmount requests
+  for specific directories.
+
+  For example, many programs refer /proc,
+  so if /proc is unmounted by an attacker,
+  the system will go wrong.
+  You can prevent the attacker from unmounting
+  /proc with this option.
+
+CONFIG_SAKURA_DENY_CONCEAL_MOUNT
+  This option allows you to prevent mount requests
+  that conceals existing mounts.
+
+  For example, if tmpfs is mounted on /dev or /dev/shm
+  when /dev/shm is already mounted, the files in /dev/shm
+  will be hidden.
+  You can prevent such cases with this option.
+
+CONFIG_SAKURA_DENY_PIVOT_ROOT
+  This option allows you to disable pivot_root
+  after /sbin/init starts.
+
+  In most systems, pivot_root is not used
+  after /sbin/init starts.
+
+CONFIG_SAKURA_RESTRICT_AUTOBIND
+  This option allows you to prevent specific local ports
+  from being assigned by automatic port assignment function
+  (which is called by "bind() with port = 0" or
+  "connect() without bind()").
+
+  For example, some proxy server uses port 8080, so this port
+  should not be assigned by automatic port assignment function.
+
+  You can create a single local ports range
+  for automatic port assignment function
+  via /proc/sys/net/ipv4/ip_local_port_range .
+  This option allows you to divide the single range into multiple.
+
+CONFIG_TOMOYO
+  Say Y here to support the Domain-Based Mandatory Access Control.
+
+  TOMOYO stands for "Task Oriented Management Obviates Your Onus".
+  TOMOYO is intended to provide the Domain-Based MAC
+  utilizing task_struct.
+
+  The word "domain" in TOMOYO is a class that a process
+  (i.e. task_struct) belong to.
+  The domain of a process changes whenever the process
+  executes a program.
+  This allows you to classify at the finest level.
+  The access permission is granted to domains, not to processes.
+  Policy is defined as "Which domain can access to which resource.".
+  There is no concept of "user id" nor "role" like RBAC.
+
+  The biggest feature of TOMOYO is that TOMOYO has "accept mode".
+  The accept mode can automatically generate policy definition,
+  and dramatically reduces the policy definition labors.
+
+  TOMOYO is much simpler and easier than SELinux.
+
+  TOMOYO is applicable to figuring out the system's behavior, for
+  TOMOYO uses the canonicalized absolute pathnames and
+  TreeView style domain transitions.
+
+  You can make custom root fs with minimum files
+  to run minimum applications with TOMOYO.
+
+CONFIG_TOMOYO_MAX_ACCEPT_ENTRY
+  This is the default value for maximal ACL entries
+  that are automatically appended into policy at "accept mode".
+  Some programs access thousands of objects, so running
+  such programs in "accept mode" dulls the system response
+  and consumes much memory.
+  This is the safeguard for such programs.
+
+CONFIG_TOMOYO_MAC_FOR_FILE
+  Say Y here to support the MAC for file access.
+
+  This is the main feature of TOMOYO.
+  If you don't say Y to this option,
+  you can't improve the system security.
+
+CONFIG_TOMOYO_MAC_FOR_ARGV0
+  Say Y here to support the MAC for argv0.
+
+  The domain transition is done based on filename passed to do_execve(),
+  while the behavior is defined based on argv[0].
+  There is no problem if the filename is argv[0]-unaware application.
+  But if argv[0]-aware, passing malicious argv[0] may cause
+  unexpected behavior.
+  This option allows you to prevent unexpected argv[0].
+
+CONFIG_TOMOYO_MAC_FOR_NETWORK
+  Say Y here to support the MAC for network address and port usage.
+
+  This option allows you to restrict IP address and port numbers
+  that a domain can use.
+  For example, you can use this option to allow SSH server to
+  "bind to TCP port 22 on address 10.0.0.1"
+  "listen to TCP port 22 on address 10.0.0.1"
+  "accept from TCP port between 1024 and 65535 on address
+   between 10.0.0.3 and 10.0.0.254"
+  "communicate with UDP port 53 of address 10.0.0.2"
+  using the following policy.
+
+  allow_bind TCP 10.0.0.1 22
+  allow_listen TCP 10.0.0.1 22
+  allow_accept TCP 10.0.0.3-10.0.0.254 1024-65535
+  allow_connect UDP 10.0.0.2 53
+
+CONFIG_TOMOYO_MAC_FOR_SIGNAL
+  Say Y here to support the MAC for signal delivery.
+
+  This option allows you to restrict
+  the combination of (signal number, destination domain)
+  that a domain can deliver.
+
+  Without this option, any process that are running as root
+  can kill arbitrary processes.
+
+CONFIG_TOMOYO_MAC_FOR_CAPABILITY
+  Say Y here to support the MAC for capabilities.
+
+  The capabilities in TOMOYO are not the Linux (POSIX) capabilities.
+  The capabilities in TOMOYO are the boolean flags of system calls
+  that a domain can call.
+
+  You should say Y to this option, for the policy syntax can't
+  distinguish regular files, FIFOs, unix domain sockets,
+  symbolic links and device files.
+  This option allows you to restrict type of files
+  that a domain can create using mknod.
+
+CONFIG_TOMOYO_AUDIT
+  If you enable this option, you can read
+  access grant logs and access reject logs via
+  /proc/ccs/info/grant_log and /proc/ccs/info/reject_log .
+  If you don't need these logs you can disable this option.
+
+CONFIG_TOMOYO_MAX_GRANT_LOG
+  This is the default value for maximal entries for
+  access grant logs that the kernel can hold on memory.
+  You can read the log via /proc/ccs/info/grant_log.
+  If you don't need access grant logs,
+  you may set this value to 0.
+
+CONFIG_TOMOYO_MAX_REJECT_LOG
+  This is the default value for maximal entries for
+  access reject logs that the kernel can hold on memory.
+  You can read the log via /proc/ccs/info/reject_log.
+  If you don't need access reject logs,
+  you may set this value to 0.
+
+CONFIG_SYAORAN
+  Say Y or M here to support the Tamper-Proof Device Filesystem.
+
+  SYAORAN stands for
+  "Simple Yet All-important Object Realizing Abiding Nexus".
+  SYAORAN is a filesystem for /dev with Mandatory Access Control.
+
+  SAKURA can make root fs read-only, but the system can't work
+  if /dev is read-only. Therefore you need to mount a writable
+  filesystem (such as tmpfs) for /dev if root fs is read-only.
+
+  But the writable /dev means that files on /dev might be tampered.
+  For example, if /dev/null is deleted and re-created as a symbolic
+  link to /dev/hda by an attacker, the contents of the IDE HDD
+  will be destroyed at a blow.
+
+  Also, TOMOYO controls file access by pathnames,
+  not by security labels.
+  Therefore /dev/null, for example, might be tampered
+  if a process have write permission to /dev/null .
+
+  SYAORAN can ensure /dev/null is a character device file
+  with major=1 minor=3.
+
+  You can use SAKURA to make /dev not unmountable.
+
 #
 # A couple of things I keep forgetting:
 #   capitalize: AppleTalk, Ethernet, DOS, DMA, FAT, FTP, Internet,
diff -ubBpEr linux-2.4.34/Makefile linux-2.4.34-ccs/Makefile
--- linux-2.4.34/Makefile       2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/Makefile   2007-03-03 10:55:24.000000000 +0900
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 4
 SUBLEVEL = 34
-EXTRAVERSION =
+EXTRAVERSION = -ccs
 
 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 
diff -ubBpEr linux-2.4.34/fs/Config.in linux-2.4.34-ccs/fs/Config.in
--- linux-2.4.34/fs/Config.in   2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/fs/Config.in       2007-03-03 10:55:24.000000000 +0900
@@ -176,4 +176,7 @@ comment 'Partition Types'
 source fs/partitions/Config.in
 endmenu
 source fs/nls/Config.in
+
+source fs/Config.ccs.in
+
 endmenu
diff -ubBpEr linux-2.4.34/fs/Makefile linux-2.4.34-ccs/fs/Makefile
--- linux-2.4.34/fs/Makefile    2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/fs/Makefile        2007-03-03 10:55:24.000000000 +0900
@@ -80,5 +80,5 @@ obj-$(CONFIG_BINFMT_ELF)      += binfmt_elf.o
 # persistent filesystems
 obj-y += $(join $(subdir-y),$(subdir-y:%=/%.o))
 
-
+include Makefile-2.4.ccs
 include $(TOPDIR)/Rules.make
diff -ubBpEr linux-2.4.34/fs/attr.c linux-2.4.34-ccs/fs/attr.c
--- linux-2.4.34/fs/attr.c      2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/attr.c  2007-03-03 11:38:51.000000000 +0900
@@ -12,6 +12,9 @@
 #include <linux/dnotify.h>
 #include <linux/fcntl.h>
 #include <linux/quotaops.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 /* Taken over from the old code... */
 
@@ -127,6 +130,10 @@ int notify_change(struct dentry * dentry
                attr->ia_atime = now;
        if (!(ia_valid & ATTR_MTIME_SET))
                attr->ia_mtime = now;
+       /***** TOMOYO Linux start. *****/
+       if ((ia_valid & ATTR_MODE) && CheckCapabilityACL(TOMOYO_SYS_CHMOD)) return -EPERM;
+       if ((ia_valid & (ATTR_UID | ATTR_GID)) && CheckCapabilityACL(TOMOYO_SYS_CHOWN)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        lock_kernel();
        if (inode->i_op && inode->i_op->setattr) 
diff -ubBpEr linux-2.4.34/fs/exec.c linux-2.4.34-ccs/fs/exec.c
--- linux-2.4.34/fs/exec.c      2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/exec.c  2007-03-06 10:05:18.000000000 +0900
@@ -48,6 +48,10 @@
 #include <linux/kmod.h>
 #endif
 
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
+
 int core_uses_pid;
 char core_pattern[65] = "core";
 int core_setuid_ok = 0;
@@ -125,6 +129,11 @@ asmlinkage long sys_uselib(const char * 
        if (error)
                goto exit;
 
+       /***** TOMOYO Linux start. *****/
+       error = CheckOpenPermission(nd.dentry, nd.mnt, 01); /* 01 means "read". */
+       if (error) goto exit;
+       /***** TOMOYO Linux end. *****/
+
        file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
        error = PTR_ERR(file);
        if (IS_ERR(file))
@@ -389,6 +398,9 @@ struct file *open_exec(const char *name)
                        int err = permission(inode, MAY_EXEC);
                        if (!err && !(inode->i_mode & 0111))
                                err = -EACCES;
+                       /***** TOMOYO Linux start. *****/
+                       if (!err && (current->tomoyo_flags & TOMOYO_CHECK_READ_FOR_OPEN_EXEC)) err = CheckOpenPermission(nd.dentry, nd.mnt, 01); /* 01 means "read". */
+                       /***** TOMOYO Linux end. *****/
                        file = ERR_PTR(err);
                        if (!err) {
                                file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
@@ -978,7 +990,8 @@ int do_execve(char * filename, char ** a
        if (retval < 0) 
                goto out; 
 
-       retval = search_binary_handler(&bprm,regs);
+       retval = search_binary_handler_with_transition(&bprm,regs);
+
        if (retval >= 0)
                /* execve success */
                return retval;
diff -ubBpEr linux-2.4.34/fs/fcntl.c linux-2.4.34-ccs/fs/fcntl.c
--- linux-2.4.34/fs/fcntl.c     2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/fcntl.c 2007-03-03 11:38:51.000000000 +0900
@@ -16,6 +16,9 @@
 #include <asm/poll.h>
 #include <asm/siginfo.h>
 #include <asm/uaccess.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 extern int sock_fcntl (struct file *, unsigned int cmd, unsigned long arg);
 extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
@@ -214,6 +217,10 @@ static int setfl(int fd, struct file * f
        if (!(arg & O_APPEND) && IS_APPEND(inode))
                return -EPERM;
 
+       /***** TOMOYO Linux start. *****/
+       if (!(arg & O_APPEND) && CheckReWritePermission(filp)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
+
        /* Did FASYNC state change? */
        if ((arg ^ filp->f_flags) & FASYNC) {
                if (filp->f_op && filp->f_op->fasync) {
diff -ubBpEr linux-2.4.34/fs/ioctl.c linux-2.4.34-ccs/fs/ioctl.c
--- linux-2.4.34/fs/ioctl.c     2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/ioctl.c 2007-03-03 11:38:51.000000000 +0900
@@ -10,6 +10,9 @@
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 static int file_ioctl(struct file *filp,unsigned int cmd,unsigned long arg)
 {
@@ -112,6 +115,9 @@ asmlinkage long sys_ioctl(unsigned int f
                                error = -ENOTTY;
                        break;
                default:
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = CheckCapabilityACL(TOMOYO_SYS_IOCTL)) < 0) break;
+                       /***** TOMOYO Linux end. *****/
                        error = -ENOTTY;
                        if (S_ISREG(filp->f_dentry->d_inode->i_mode))
                                error = file_ioctl(filp, cmd, arg);
diff -ubBpEr linux-2.4.34/fs/namei.c linux-2.4.34-ccs/fs/namei.c
--- linux-2.4.34/fs/namei.c     2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/namei.c 2007-03-03 11:42:15.000000000 +0900
@@ -28,6 +28,11 @@
 
 #define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
 
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+#include <linux/module.h>
+/***** TOMOYO Linux end. *****/
+
 /* [Feb-1997 T. Schoebel-Theuer]
  * Fundamental changes in the pathname lookup mechanisms (namei)
  * were necessary because of omirr.  The reason is that omirr needs
@@ -988,6 +993,9 @@ exit_lock:
        return error;
 }
 
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo_vfs.h>
+/***** TOMOYO Linux end. *****/
 /*
  *     open_namei()
  *
@@ -1053,6 +1061,9 @@ do_last:
 
        /* Negative dentry, just create the file */
        if (!dentry->d_inode) {
+               /***** TOMOYO Linux start. *****/
+               if ((error = pre_vfs_create(dir->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_CREATE_ACL, dentry, nd->mnt)) == 0)
+               /***** TOMOYO Linux end. *****/
                error = vfs_create(dir->d_inode, dentry,
                                   mode & ~current->fs->umask);
                up(&dir->d_inode->i_sem);
@@ -1139,6 +1150,11 @@ ok:
                        goto exit;
        }
 
+    /***** TOMOYO Linux start. *****/
+    error = CheckOpenPermission(dentry, nd->mnt, flag); /* includes O_APPEND and O_TRUNC checks */
+       if (error) goto exit;
+    /***** TOMOYO Linux end. *****/
+
        /*
         * Ensure there are no outstanding leases on the file.
         */
@@ -1277,6 +1293,13 @@ asmlinkage long sys_mknod(const char * f
 
        if (S_ISDIR(mode))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (S_ISCHR(mode) && CheckCapabilityACL(TOMOYO_CREATE_CHAR_DEV)) return -EPERM;
+       if (S_ISBLK(mode) && CheckCapabilityACL(TOMOYO_CREATE_BLOCK_DEV)) return -EPERM;
+       if (S_ISFIFO(mode) && CheckCapabilityACL(TOMOYO_CREATE_FIFO)) return -EPERM;
+       if (S_ISSOCK(mode) && CheckCapabilityACL(TOMOYO_CREATE_UNIX_SOCKET)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
+
        tmp = getname(filename);
        if (IS_ERR(tmp))
                return PTR_ERR(tmp);
@@ -1291,9 +1314,19 @@ asmlinkage long sys_mknod(const char * f
        if (!IS_ERR(dentry)) {
                switch (mode & S_IFMT) {
                case 0: case S_IFREG:
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = pre_vfs_create(nd.dentry->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_CREATE_ACL, dentry, nd.mnt)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        error = vfs_create(nd.dentry->d_inode,dentry,mode);
                        break;
                case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = pre_vfs_mknod(nd.dentry->d_inode, dentry)) == 0 &&
+                               (error = CheckSingleWritePermission(S_ISCHR(mode) ? TYPE_MKCHAR_ACL :
+                                                                                                       S_ISBLK(mode) ? TYPE_MKBLOCK_ACL :
+                                                                                                       S_ISFIFO(mode) ? TYPE_MKFIFO_ACL :
+                                                                                                       TYPE_MKSOCK_ACL, dentry, nd.mnt)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        error = vfs_mknod(nd.dentry->d_inode,dentry,mode,dev);
                        break;
                case S_IFDIR:
@@ -1355,6 +1388,9 @@ asmlinkage long sys_mkdir(const char * p
                dentry = lookup_create(&nd, 1);
                error = PTR_ERR(dentry);
                if (!IS_ERR(dentry)) {
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = pre_vfs_mkdir(nd.dentry->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_MKDIR_ACL, dentry, nd.mnt)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        error = vfs_mkdir(nd.dentry->d_inode, dentry,
                                          mode & ~current->fs->umask);
                        dput(dentry);
@@ -1464,6 +1500,9 @@ asmlinkage long sys_rmdir(const char * p
        dentry = lookup_hash(&nd.last, nd.dentry);
        error = PTR_ERR(dentry);
        if (!IS_ERR(dentry)) {
+               /***** TOMOYO Linux start. *****/
+               if ((error = pre_vfs_rmdir(nd.dentry->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_RMDIR_ACL, dentry, nd.mnt)) == 0)
+               /***** TOMOYO Linux end. *****/
                error = vfs_rmdir(nd.dentry->d_inode, dentry);
                dput(dentry);
        }
@@ -1515,6 +1554,9 @@ asmlinkage long sys_unlink(const char * 
        char * name;
        struct dentry *dentry;
        struct nameidata nd;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_UNLINK)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        name = getname(pathname);
        if(IS_ERR(name))
@@ -1533,6 +1575,9 @@ asmlinkage long sys_unlink(const char * 
                /* Why not before? Because we want correct error value */
                if (nd.last.name[nd.last.len])
                        goto slashes;
+               /***** TOMOYO Linux start. *****/
+               if ((error = pre_vfs_unlink(nd.dentry->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_UNLINK_ACL, dentry, nd.mnt)) == 0)
+               /***** TOMOYO Linux end. *****/
                error = vfs_unlink(nd.dentry->d_inode, dentry);
        exit2:
                dput(dentry);
@@ -1581,6 +1626,9 @@ asmlinkage long sys_symlink(const char *
        int error = 0;
        char * from;
        char * to;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_SYMLINK)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        from = getname(oldname);
        if(IS_ERR(from))
@@ -1597,6 +1645,9 @@ asmlinkage long sys_symlink(const char *
                dentry = lookup_create(&nd, 0);
                error = PTR_ERR(dentry);
                if (!IS_ERR(dentry)) {
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = pre_vfs_symlink(nd.dentry->d_inode, dentry)) == 0 && (error = CheckSingleWritePermission(TYPE_SYMLINK_ACL, dentry, nd.mnt)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        error = vfs_symlink(nd.dentry->d_inode, dentry, from);
                        dput(dentry);
                }
@@ -1664,6 +1715,9 @@ asmlinkage long sys_link(const char * ol
 {
        int error;
        char * to;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_LINK)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        to = getname(newname);
        error = PTR_ERR(to);
@@ -1683,6 +1737,9 @@ asmlinkage long sys_link(const char * ol
                new_dentry = lookup_create(&nd, 0);
                error = PTR_ERR(new_dentry);
                if (!IS_ERR(new_dentry)) {
+                       /***** TOMOYO Linux start. *****/
+                       if ((error = pre_vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry)) == 0 && (error = CheckDoubleWritePermission(TYPE_LINK_ACL, old_nd.dentry, old_nd.mnt, new_dentry, nd.mnt)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
                        dput(new_dentry);
                }
@@ -1913,6 +1970,12 @@ static inline int do_rename(const char *
        error = PTR_ERR(new_dentry);
        if (IS_ERR(new_dentry))
                goto exit4;
+       /***** TOMOYO Linux start. *****/
+       if ((error = pre_vfs_rename(old_dir->d_inode, old_dentry, new_dir->d_inode, new_dentry)) < 0 ||
+               (error = CheckDoubleWritePermission(TYPE_RENAME_ACL, old_dentry, oldnd.mnt, new_dentry, newnd.mnt)) < 0) {
+               dput(new_dentry); goto exit4;
+       }
+       /***** TOMOYO Linux end. *****/
 
        lock_kernel();
        error = vfs_rename(old_dir->d_inode, old_dentry,
@@ -1937,6 +2000,9 @@ asmlinkage long sys_rename(const char * 
        int error;
        char * from;
        char * to;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_RENAME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        from = getname(oldname);
        if(IS_ERR(from))
diff -ubBpEr linux-2.4.34/fs/namespace.c linux-2.4.34-ccs/fs/namespace.c
--- linux-2.4.34/fs/namespace.c 2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/namespace.c     2007-03-06 10:03:01.000000000 +0900
@@ -21,6 +21,13 @@
 #include <linux/seq_file.h>
 #include <linux/namespace.h>
 
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
+
 struct vfsmount *do_kern_mount(const char *type, int flags, char *name, void *data);
 int do_remount_sb(struct super_block *sb, int flags, void * data);
 void kill_super(struct super_block *sb);
@@ -290,6 +297,9 @@ static int do_umount(struct vfsmount *mn
 {
        struct super_block * sb = mnt->mnt_sb;
        int retval = 0;
+       /***** SAKURA Linux start. *****/
+       if (SAKURA_MayUmount(mnt) < 0) return -EPERM;
+       /***** SAKURA Linux end. *****/
 
        /*
         * If we may have to abort operations to get out of this
@@ -365,6 +375,9 @@ asmlinkage long sys_umount(char * name, 
 {
        struct nameidata nd;
        int retval;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_UMOUNT)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        retval = __user_walk(name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &nd);
        if (retval)
@@ -500,6 +513,10 @@ static int do_loopback(struct nameidata 
        down_write(&current->namespace->sem);
        err = -EINVAL;
        if (check_mnt(nd->mnt) && (!recurse || check_mnt(old_nd.mnt))) {
+               /***** SAKURA Linux start. *****/
+               err = -EPERM;
+               if (SAKURA_MayMount(nd) < 0) goto out;
+               /***** SAKURA Linux end. *****/
                err = -ENOMEM;
                if (recurse)
                        mnt = copy_tree(old_nd.mnt, old_nd.dentry);
@@ -516,7 +533,9 @@ static int do_loopback(struct nameidata 
                } else
                        mntput(mnt);
        }
-
+       /***** SAKURA Linux start. *****/
+ out:
+       /***** SAKURA Linux end. *****/
        up_write(&current->namespace->sem);
        path_release(&old_nd);
        return err;
@@ -570,6 +589,11 @@ static int do_move_mount(struct nameidat
        if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
                goto out;
 
+       /***** SAKURA Linux start. *****/
+       err = -EPERM;
+       if (SAKURA_MayUmount(old_nd.mnt) < 0 || SAKURA_MayMount(nd) < 0) goto out;
+       /***** SAKURA Linux end. *****/
+
        err = -ENOENT;
        down(&nd->dentry->d_inode->i_zombie);
        if (IS_DEADDIR(nd->dentry->d_inode))
@@ -641,6 +665,11 @@ static int do_add_mount(struct nameidata
        if (nd->mnt->mnt_sb == mnt->mnt_sb && nd->mnt->mnt_root == nd->dentry)
                goto unlock;
 
+       /***** SAKURA Linux start. *****/
+       err = -EPERM;
+       if (SAKURA_MayMount(nd) < 0) goto unlock;
+       /***** SAKURA Linux end. *****/
+       
        mnt->mnt_flags = mnt_flags;
        err = graft_tree(mnt, nd);
 unlock:
@@ -718,6 +747,13 @@ long do_mount(char * dev_name, char * di
        if (data_page)
                ((char *)data_page)[PAGE_SIZE - 1] = 0;
 
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_MOUNT)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
+       /***** SAKURA Linux start. *****/
+       if (CheckMountPermission(dev_name, dir_name, type_page, &flags)) return -EPERM;
+       /***** SAKURA Linux end. *****/
+
        /* Separate the per-mountpoint flags */
        if (flags & MS_NOSUID)
                mnt_flags |= MNT_NOSUID;
@@ -912,6 +948,10 @@ asmlinkage long sys_pivot_root(const cha
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
 
+       /***** SAKURA Linux start. *****/
+       if (CheckPivotRootPermission() < 0) return -EPERM;
+       /***** SAKURA Linux end. *****/
+
        lock_kernel();
 
        error = __user_walk(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
diff -ubBpEr linux-2.4.34/fs/open.c linux-2.4.34-ccs/fs/open.c
--- linux-2.4.34/fs/open.c      2007-03-03 11:38:51.000000000 +0900
+++ linux-2.4.34-ccs/fs/open.c  2007-03-05 13:51:39.000000000 +0900
@@ -20,6 +20,13 @@
 
 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
 
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
+
 int vfs_statfs(struct super_block *sb, struct statfs *buf)
 {
        int retval = -ENODEV;
@@ -162,6 +169,10 @@ static inline long do_sys_truncate(const
        if (error)
                goto dput_and_out;
 
+       /***** TOMOYO Linux start. *****/
+       if ((error = CheckSingleWritePermission(TYPE_TRUNCATE_ACL, nd.dentry, nd.mnt)) == 0)
+       /***** TOMOYO Linux end. *****/
+
        error = locks_verify_truncate(inode, NULL, length);
        if (!error) {
                DQUOT_INIT(inode);
@@ -215,6 +226,9 @@ static inline long do_sys_ftruncate(unsi
        if (IS_APPEND(inode))
                goto out_putf;
 
+       /***** TOMOYO Linux start. *****/
+       if ((error = CheckSingleWritePermission(TYPE_TRUNCATE_ACL, dentry, file->f_vfsmnt)) == 0)
+       /***** TOMOYO Linux end. *****/
        error = locks_verify_truncate(inode, file, length);
        if (!error)
                error = do_truncate(dentry, length);
@@ -451,6 +465,9 @@ asmlinkage long sys_chroot(const char * 
 {
        int error;
        struct nameidata nd;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_CHROOT)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        error = __user_walk(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
                      LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
@@ -465,6 +482,19 @@ asmlinkage long sys_chroot(const char * 
        if (!capable(CAP_SYS_CHROOT))
                goto dput_and_out;
 
+       /***** SAKURA Linux start. *****/
+       {
+               char *name = getname(filename);
+               if (!IS_ERR(name)) {
+                       error = CheckChRootPermission(name);
+                       putname(name);
+               } else {
+                       error = PTR_ERR(name);
+               }
+               if (error < 0) goto dput_and_out;
+       }
+       /***** SAKURA Linux end. *****/
+
        set_fs_root(current->fs, nd.mnt, nd.dentry);
        set_fs_altroot();
        error = 0;
@@ -895,6 +925,9 @@ out_unlock:
  */
 asmlinkage long sys_vhangup(void)
 {
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_VHANGUP) == 0)
+       /***** TOMOYO Linux end. *****/
        if (capable(CAP_SYS_TTY_CONFIG)) {
                tty_vhangup(current->tty);
                return 0;
diff -ubBpEr linux-2.4.34/fs/proc/Makefile linux-2.4.34-ccs/fs/proc/Makefile
--- linux-2.4.34/fs/proc/Makefile       2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/fs/proc/Makefile   2007-03-03 10:55:24.000000000 +0900
@@ -18,4 +18,8 @@ ifeq ($(CONFIG_PROC_DEVICETREE),y)
 obj-y += proc_devtree.o
 endif
 
+export-objs += ccs_proc.o
+obj-$(CONFIG_SAKURA) += ccs_proc.o
+obj-$(CONFIG_TOMOYO) += ccs_proc.o
+
 include $(TOPDIR)/Rules.make
diff -ubBpEr linux-2.4.34/fs/proc/proc_misc.c linux-2.4.34-ccs/fs/proc/proc_misc.c
--- linux-2.4.34/fs/proc/proc_misc.c    2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/fs/proc/proc_misc.c        2007-03-06 10:07:35.000000000 +0900
@@ -670,4 +670,13 @@ void __init proc_misc_init(void)
                        entry->proc_fops = &ppc_htab_operations;
        }
 #endif
+       /***** CCS start. *****/
+#if defined(CONFIG_SAKURA) || defined(CONFIG_TOMOYO)
+       {
+               extern void __init CCSProc_Init(void);
+               CCSProc_Init();
+               printk("Hook version: 2.4.34 2007/03/06\n");
+       }
+#endif
+       /***** CCS end. *****/
 }
diff -ubBpEr linux-2.4.34/include/linux/sched.h linux-2.4.34-ccs/include/linux/sched.h
--- linux-2.4.34/include/linux/sched.h  2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/include/linux/sched.h      2007-03-07 14:05:08.000000000 +0900
@@ -29,6 +29,11 @@ extern unsigned long event;
 
 struct exec_domain;
 
+/***** TOMOYO Linux start. *****/
+struct domain_info;
+extern struct domain_info KERNEL_DOMAIN;
+/***** TOMOYO Linux end. *****/
+
 /*
  * cloning flags:
  */
@@ -415,6 +420,10 @@ struct task_struct {
 
 /* journalling filesystem info */
        void *journal_info;
+       /***** TOMOYO Linux start. *****/
+       struct domain_info *domain_info;
+       unsigned int tomoyo_flags;
+       /***** TOMOYO Linux end. *****/
 };
 
 /*
@@ -510,6 +519,10 @@ extern struct exec_domain  default_exec_d
     blocked:           {{0}},                                          \
     alloc_lock:                SPIN_LOCK_UNLOCKED,                             \
     journal_info:      NULL,                                           \
+    /***** TOMOYO Linux start. *****/ \
+    domain_info: &KERNEL_DOMAIN,      \
+    tomoyo_flags: 0                   \
+    /***** TOMOYO Linux end. *****/   \
 }
 
 
diff -ubBpEr linux-2.4.34/kernel/kmod.c linux-2.4.34-ccs/kernel/kmod.c
--- linux-2.4.34/kernel/kmod.c  2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/kmod.c      2007-03-03 11:17:10.000000000 +0900
@@ -134,6 +134,11 @@ int exec_usermodehelper(char *program_pa
        /* Allow execve args to be in kernel space. */
        set_fs(KERNEL_DS);
 
+       /***** TOMOYO Linux start. *****/
+       current->domain_info = &KERNEL_DOMAIN;
+       current->tomoyo_flags = 0;
+       /***** TOMOYO Linux start. *****/
+
        /* Go, go, go... */
        if (execve(program_path, argv, envp) < 0)
                return -errno;
diff -ubBpEr linux-2.4.34/kernel/module.c linux-2.4.34-ccs/kernel/module.c
--- linux-2.4.34/kernel/module.c        2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/module.c    2007-03-03 10:55:24.000000000 +0900
@@ -10,6 +10,9 @@
 #include <linux/slab.h>
 #include <linux/kmod.h>
 #include <linux/seq_file.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 /*
  * Originally by Anonymous (as far as I know...)
@@ -298,6 +301,9 @@ sys_create_module(const char *name_user,
 
        if (!capable(CAP_SYS_MODULE))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_USE_KERNEL_MODULE)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
        lock_kernel();
        if ((namelen = get_mod_name(name_user, &name)) < 0) {
                error = namelen;
@@ -353,6 +359,9 @@ sys_init_module(const char *name_user, s
 
        if (!capable(CAP_SYS_MODULE))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_USE_KERNEL_MODULE)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
        lock_kernel();
        if ((namelen = get_mod_name(name_user, &name)) < 0) {
                error = namelen;
@@ -614,6 +623,9 @@ sys_delete_module(const char *name_user)
 
        if (!capable(CAP_SYS_MODULE))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_USE_KERNEL_MODULE)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        lock_kernel();
        if (name_user) {
diff -ubBpEr linux-2.4.34/kernel/sched.c linux-2.4.34-ccs/kernel/sched.c
--- linux-2.4.34/kernel/sched.c 2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/sched.c     2007-03-03 10:55:24.000000000 +0900
@@ -32,6 +32,9 @@
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 extern void timer_bh(void);
 extern void tqueue_bh(void);
@@ -899,6 +902,9 @@ void set_cpus_allowed(struct task_struct
 asmlinkage long sys_nice(int increment)
 {
        long newprio;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_NICE)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        /*
         *      Setpriority might change our priority at the same moment.
diff -ubBpEr linux-2.4.34/kernel/signal.c linux-2.4.34-ccs/kernel/signal.c
--- linux-2.4.34/kernel/signal.c        2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/signal.c    2007-03-03 10:55:24.000000000 +0900
@@ -15,6 +15,9 @@
 #include <linux/sched.h>
 
 #include <asm/uaccess.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 /*
  * SLAB caches for signal bits.
@@ -1014,6 +1017,10 @@ asmlinkage long
 sys_kill(int pid, int sig)
 {
        struct siginfo info;
+       /***** TOMOYO Linux start. *****/
+       if (sig && CheckCapabilityACL(TOMOYO_SYS_KILL) < 0) return -EPERM;
+       if (sig && CheckSignalACL(sig, pid) < 0) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        info.si_signo = sig;
        info.si_errno = 0;
@@ -1038,6 +1045,10 @@ sys_tkill(int pid, int sig)
        if (pid <= 0)
            return -EINVAL;
 
+       /***** TOMOYO Linux start. *****/
+       if (sig && CheckCapabilityACL(TOMOYO_SYS_KILL) < 0) return -EPERM;
+       if (sig && CheckSignalACL(sig, pid) < 0) return -EPERM;
+       /***** TOMOYO Linux end. *****/
        info.si_signo = sig;
        info.si_errno = 0;
        info.si_code = SI_TKILL;
diff -ubBpEr linux-2.4.34/kernel/sys.c linux-2.4.34-ccs/kernel/sys.c
--- linux-2.4.34/kernel/sys.c   2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/sys.c       2007-03-03 10:55:24.000000000 +0900
@@ -17,6 +17,9 @@
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 #ifndef SET_UNALIGN_CTL
 # define SET_UNALIGN_CTL(a,b)  (-EINVAL)
@@ -220,6 +223,9 @@ asmlinkage long sys_setpriority(int whic
 
        if (which > 2 || which < 0)
                return -EINVAL;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_NICE)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        /* normalize: avoid signed division (rounding problems) */
        error = -ESRCH;
@@ -299,6 +305,9 @@ asmlinkage long sys_reboot(int magic1, i
            (magic2 != LINUX_REBOOT_MAGIC2 && magic2 != LINUX_REBOOT_MAGIC2A &&
                        magic2 != LINUX_REBOOT_MAGIC2B))
                return -EINVAL;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_REBOOT)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        lock_kernel();
        switch (cmd) {
@@ -1042,6 +1051,9 @@ asmlinkage long sys_sethostname(char *na
                return -EPERM;
        if (len < 0 || len > __NEW_UTS_LEN)
                return -EINVAL;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_SETHOSTNAME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
        down_write(&uts_sem);
        errno = -EFAULT;
        if (!copy_from_user(tmp, name, len)) {
@@ -1083,6 +1095,9 @@ asmlinkage long sys_setdomainname(char *
                return -EPERM;
        if (len < 0 || len > __NEW_UTS_LEN)
                return -EINVAL;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_SETHOSTNAME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
 
        down_write(&uts_sem);
        errno = -EFAULT;
diff -ubBpEr linux-2.4.34/kernel/sysctl.c linux-2.4.34-ccs/kernel/sysctl.c
--- linux-2.4.34/kernel/sysctl.c        2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/sysctl.c    2007-03-03 10:55:24.000000000 +0900
@@ -33,6 +33,9 @@
 #include <linux/swap.h>
 
 #include <asm/uaccess.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 #ifdef CONFIG_ROOT_NFS
 #include <linux/nfs_fs.h>
@@ -409,6 +412,87 @@ void __init sysctl_init(void)
 #endif
 }
 
+/***** TOMOYO Linux start. *****/
+static int try_parse_table(int __user *name, int nlen, void __user *oldval, void __user *newval, ctl_table *table)
+{
+       int n;
+       int error = -ENOMEM;
+       int op = 0;
+       char *buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
+       if (oldval) op |= 004;
+       if (newval) op |= 002;
+       if (!op) { /* Neither read nor write */
+               error = 0;
+               goto out;
+       }
+       if (!buffer) goto out;
+       memset(buffer, 0, PAGE_SIZE);
+       snprintf(buffer, PAGE_SIZE - 1, "/proc/sys");
+ repeat:
+       if (!nlen) {
+               error = -ENOTDIR;
+               goto out;
+       }
+       if (get_user(n, name)) {
+               error = -EFAULT;
+               goto out;
+       }
+       for ( ; table->ctl_name; table++) {
+               if (n == table->ctl_name || table->ctl_name == CTL_ANY) {
+                       int pos = strlen(buffer);
+                       const char *cp = table->procname;
+                       error = -ENOMEM;
+                       if (cp) {
+                               if (pos + 1 >= PAGE_SIZE - 1) goto out;
+                               buffer[pos++] = '/';
+                               while (*cp) {
+                                       const unsigned char c = * (const unsigned char *) cp;
+                                       if (c == '\\') {
+                                               if (pos + 2 >= PAGE_SIZE - 1) goto out;
+                                               buffer[pos++] = '\\';
+                                               buffer[pos++] = '\\';
+                                       } else if (c > ' ' && c < 127) {
+                                               if (pos + 1 >= PAGE_SIZE - 1) goto out;
+                                               buffer[pos++] = c;
+                                       } else {
+                                               if (pos + 4 >= PAGE_SIZE - 1) goto out;
+                                               buffer[pos++] = '\\';
+                                               buffer[pos++] = (c >> 6) + '0';
+                                               buffer[pos++] = ((c >> 3) & 7) + '0';
+                                               buffer[pos++] = (c & 7) + '0';
+                                       }
+                                       cp++;
+                               }
+                       } else {
+                               /* Assume nobody assigns "=\$=" for procname. */
+                               snprintf(buffer + pos, PAGE_SIZE - pos - 1, "/=%d=", table->ctl_name);
+                               if (memchr(buffer, '\0', PAGE_SIZE - 2) == NULL) goto out;
+                       }
+                       if (table->child) {
+                               if (table->strategy) {
+                                       /* printk("sysctl='%s'\n", buffer); */
+                                       if (CheckFilePerm(buffer, op, "sysctl")) {
+                                               error = -EPERM;
+                                               goto out;
+                                       }
+                               }
+                               name++;
+                               nlen--;
+                               table = table->child;
+                               goto repeat;
+                       }
+                       /* printk("sysctl='%s'\n", buffer); */
+                       error = CheckFilePerm(buffer, op, "sysctl");
+                       goto out;
+               }
+       }
+       error = -ENOTDIR;
+ out:
+       kfree(buffer);
+       return error;
+}
+/***** TOMOYO Linux end. *****/
+
 int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
               void *newval, size_t newlen)
 {
@@ -437,6 +521,9 @@ int do_sysctl(int *name, int nlen, void 
 
                spin_unlock(&sysctl_lock);
 
+               /***** TOMOYO Linux start. *****/
+               if ((error = try_parse_table(name, nlen, oldval, newval, head->ctl_table)) == 0)
+               /***** TOMOYO Linux end. *****/
                error = parse_table(name, nlen, oldval, oldlenp, 
                                        newval, newlen, head->ctl_table,
                                        &context);
@@ -506,6 +593,12 @@ repeat:
                                if (ctl_perm(table, 001))
                                        return -EPERM;
                                if (table->strategy) {
+                                       /***** TOMOYO Linux start. *****/
+                                       int op = 0;
+                                       if (oldval) op |= 004;
+                                       if (newval) op |= 002;
+                                       if (ctl_perm(table, op)) return -EPERM;
+                                       /***** TOMOYO Linux end. *****/
                                        error = table->strategy(
                                                table, name, nlen,
                                                oldval, oldlenp,
@@ -1454,7 +1547,7 @@ int sysctl_string(ctl_table *table, int 
                        len--;
                ((char *) table->data)[len] = 0;
        }
-       return 0;
+       return 1;
 }
 
 /*
diff -ubBpEr linux-2.4.34/kernel/time.c linux-2.4.34-ccs/kernel/time.c
--- linux-2.4.34/kernel/time.c  2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/kernel/time.c      2007-03-03 10:55:24.000000000 +0900
@@ -29,6 +29,9 @@
 #include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 /* 
  * The timezone where the local system is located.  Used as a default by some
@@ -77,6 +80,9 @@ asmlinkage long sys_stime(int * tptr)
 
        if (!capable(CAP_SYS_TIME))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_SETTIME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
        if (get_user(value, tptr))
                return -EFAULT;
        write_lock_irq(&xtime_lock);
@@ -151,6 +157,9 @@ int do_sys_settimeofday(struct timeval *
 
        if (!capable(CAP_SYS_TIME))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (CheckCapabilityACL(TOMOYO_SYS_SETTIME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
                
        if (tz) {
                /* SMP safe, global irq locking makes it work. */
@@ -217,6 +226,9 @@ int do_adjtimex(struct timex *txc)
        /* In order to modify anything, you gotta be super-user! */
        if (txc->modes && !capable(CAP_SYS_TIME))
                return -EPERM;
+       /***** TOMOYO Linux start. *****/
+       if (txc->modes && CheckCapabilityACL(TOMOYO_SYS_SETTIME)) return -EPERM;
+       /***** TOMOYO Linux end. *****/
                
        /* Now we validate the data before disabling interrupts */
 
diff -ubBpEr linux-2.4.34/net/ipv4/tcp_ipv4.c linux-2.4.34-ccs/net/ipv4/tcp_ipv4.c
--- linux-2.4.34/net/ipv4/tcp_ipv4.c    2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/net/ipv4/tcp_ipv4.c        2007-03-03 10:55:24.000000000 +0900
@@ -67,6 +67,9 @@
 #include <linux/inet.h>
 #include <linux/stddef.h>
 #include <linux/ipsec.h>
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
 
 extern int sysctl_ip_dynaddr;
 extern int sysctl_ip_default_ttl;
@@ -228,6 +231,9 @@ static int tcp_v4_get_port(struct sock *
                                rover = low;
                        head = &tcp_bhash[tcp_bhashfn(rover)];
                        spin_lock(&head->lock);
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(rover) < 0) goto next;
+                       /***** SAKURA Linux end. *****/
                        for (tb = head->chain; tb; tb = tb->next)
                                if (tb->port == rover)
                                        goto next;
@@ -688,6 +694,9 @@ static int tcp_v4_hash_connect(struct so
                                rover = low;
                        head = &tcp_bhash[tcp_bhashfn(rover)];
                        spin_lock(&head->lock);         
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(rover) < 0) goto next_port;
+                       /***** SAKURA Linux end. *****/
 
                        /* Does not bother with rcv_saddr checks,
                         * because the established check is already
diff -ubBpEr linux-2.4.34/net/ipv4/udp.c linux-2.4.34-ccs/net/ipv4/udp.c
--- linux-2.4.34/net/ipv4/udp.c 2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/net/ipv4/udp.c     2007-03-03 10:55:24.000000000 +0900
@@ -97,6 +97,9 @@
 #include <net/route.h>
 #include <net/inet_common.h>
 #include <net/checksum.h>
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
 
 /*
  *     Snmp MIB for the UDP layer
@@ -124,6 +127,9 @@ static int udp_v4_get_port(struct sock *
                for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
                        struct sock *sk;
                        int size;
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(result) < 0) continue;
+                       /***** SAKURA Linux end. *****/
 
                        sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
                        if (!sk) {
@@ -148,6 +154,9 @@ static int udp_v4_get_port(struct sock *
                                result = sysctl_local_port_range[0]
                                        + ((result - sysctl_local_port_range[0]) &
                                           (UDP_HTABLE_SIZE - 1));
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(result) < 0) continue;
+                       /***** SAKURA Linux end. *****/
                        if (!udp_lport_inuse(result))
                                break;
                }
diff -ubBpEr linux-2.4.34/net/ipv6/tcp_ipv6.c linux-2.4.34-ccs/net/ipv6/tcp_ipv6.c
--- linux-2.4.34/net/ipv6/tcp_ipv6.c    2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/net/ipv6/tcp_ipv6.c        2007-03-03 10:55:24.000000000 +0900
@@ -52,6 +52,9 @@
 #include <net/inet_ecn.h>
 
 #include <asm/uaccess.h>
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
 
 static void    tcp_v6_send_reset(struct sk_buff *skb);
 static void    tcp_v6_or_send_ack(struct sk_buff *skb, struct open_request *req);
@@ -110,6 +113,9 @@ static int tcp_v6_get_port(struct sock *
                                rover = low;
                        head = &tcp_bhash[tcp_bhashfn(rover)];
                        spin_lock(&head->lock);
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(rover) < 0) goto next;
+                       /***** SAKURA Linux end. *****/
                        for (tb = head->chain; tb; tb = tb->next)
                                if (tb->port == rover)
                                        goto next;
diff -ubBpEr linux-2.4.34/net/ipv6/udp.c linux-2.4.34-ccs/net/ipv6/udp.c
--- linux-2.4.34/net/ipv6/udp.c 2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/net/ipv6/udp.c     2007-03-03 10:55:24.000000000 +0900
@@ -50,6 +50,9 @@
 #include <net/inet_common.h>
 
 #include <net/checksum.h>
+/***** SAKURA Linux start. *****/
+#include <linux/sakura.h>
+/***** SAKURA Linux end. *****/
 
 struct udp_mib udp_stats_in6[NR_CPUS*2];
 
@@ -70,6 +73,9 @@ static int udp_v6_get_port(struct sock *
                for (i = 0; i < UDP_HTABLE_SIZE; i++, result++) {
                        struct sock *sk;
                        int size;
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(result) < 0) continue;
+                       /***** SAKURA Linux end. *****/
 
                        sk = udp_hash[result & (UDP_HTABLE_SIZE - 1)];
                        if (!sk) {
@@ -94,6 +100,9 @@ static int udp_v6_get_port(struct sock *
                                result = sysctl_local_port_range[0]
                                        + ((result - sysctl_local_port_range[0]) &
                                           (UDP_HTABLE_SIZE - 1));
+                       /***** SAKURA Linux start. *****/
+                       if (SAKURA_MayAutobind(result) < 0) continue;
+                       /***** SAKURA Linux end. *****/
                        if (!udp_lport_inuse(result))
                                break;
                }
diff -ubBpEr linux-2.4.34/net/socket.c linux-2.4.34-ccs/net/socket.c
--- linux-2.4.34/net/socket.c   2007-03-03 10:49:54.000000000 +0900
+++ linux-2.4.34-ccs/net/socket.c       2007-03-03 10:55:24.000000000 +0900
@@ -84,6 +84,10 @@
 #include <net/sock.h>
 #include <net/scm.h>
 #include <linux/netfilter.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+#include <linux/tomoyo_socket.h>
+/***** TOMOYO Linux end. *****/
 
 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
 static ssize_t sock_read(struct file *file, char *buf,
@@ -501,7 +505,9 @@ int sock_sendmsg(struct socket *sock, st
 {
        int err;
        struct scm_cookie scm;
-
+       /***** TOMOYO Linux start. *****/
+       if ((err = CheckSocketSendMsgPermission(sock, (struct sockaddr *) msg->msg_name, msg->msg_namelen)) == 0)
+       /***** TOMOYO Linux start. *****/
        err = scm_send(sock, msg, &scm);
        if (err >= 0) {
                err = sock->ops->sendmsg(sock, msg, size, &scm);
@@ -519,6 +525,11 @@ int sock_recvmsg(struct socket *sock, st
        size = sock->ops->recvmsg(sock, msg, size, flags, &scm);
        if (size >= 0)
                scm_recv(sock, msg, &scm, flags);
+       /***** TOMOYO Linux start. *****/
+       if (size >= 0 && CheckSocketRecvMsgPermission(sock, (struct sockaddr *) msg->msg_name, msg->msg_namelen)) {
+               size = -EAGAIN; /* Hope less harmful than -EPERM. */
+       }
+       /***** TOMOYO Linux end. *****/
 
        return size;
 }
@@ -847,7 +858,9 @@ int sock_create(int family, int type, in
                }
                family = PF_PACKET;
        }
-               
+       /***** TOMOYO Linux start. *****/
+       if ((i = CheckSocketCreatePermission(family, type, protocol)) < 0) return i;
+       /***** TOMOYO Linux end. *****/
 #if defined(CONFIG_KMOD) && defined(CONFIG_NET)
        /* Attempt to load a protocol module if the find failed. 
         * 
@@ -1003,6 +1016,9 @@ asmlinkage long sys_bind(int fd, struct 
        if((sock = sockfd_lookup(fd,&err))!=NULL)
        {
                if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0)
+                       /***** TOMOYO Linux start. *****/
+                       if ((err = CheckSocketBindPermission(sock, (struct sockaddr *) address, addrlen)) == 0)
+                       /***** TOMOYO Linux end. *****/
                        err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
                sockfd_put(sock);
        }                       
@@ -1026,6 +1042,9 @@ asmlinkage long sys_listen(int fd, int b
        if ((sock = sockfd_lookup(fd, &err)) != NULL) {
                if ((unsigned) backlog > sysctl_somaxconn)
                        backlog = sysctl_somaxconn;
+               /***** TOMOYO Linux start. *****/
+               if ((err = CheckSocketListenPermission(sock)) == 0) 
+               /***** TOMOYO Linux end. *****/
                err=sock->ops->listen(sock, backlog);
                sockfd_put(sock);
        }
@@ -1066,6 +1085,12 @@ asmlinkage long sys_accept(int fd, struc
        if (err < 0)
                goto out_release;
 
+       /***** TOMOYO Linux start. *****/
+       if (CheckSocketAcceptPermission(newsock, (struct sockaddr *) address)) {
+               err = -ECONNABORTED; /* Hope less harmful than -EPERM. */
+               goto out_release;
+       }
+       /***** TOMOYO Linux end. *****/
        if (upeer_sockaddr) {
                if(newsock->ops->getname(newsock, (struct sockaddr *)address, &len, 2)<0) {
                        err = -ECONNABORTED;
@@ -1116,6 +1141,9 @@ asmlinkage long sys_connect(int fd, stru
        err = move_addr_to_kernel(uservaddr, addrlen, address);
        if (err < 0)
                goto out_put;
+       /***** TOMOYO Linux start. *****/
+       if ((err = CheckSocketConnectPermission(sock, (struct sockaddr *) address, addrlen)) == 0) 
+       /***** TOMOYO Linux end. *****/
        err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
                                 sock->file->f_flags);
 out_put:
diff -ubBpEr linux-2.4.34/net/unix/af_unix.c linux-2.4.34-ccs/net/unix/af_unix.c
--- linux-2.4.34/net/unix/af_unix.c     2007-03-03 11:38:54.000000000 +0900
+++ linux-2.4.34-ccs/net/unix/af_unix.c 2007-03-05 13:22:32.000000000 +0900
@@ -111,6 +111,9 @@
 #include <linux/rtnetlink.h>
 
 #include <asm/checksum.h>
+/***** TOMOYO Linux start. *****/
+#include <linux/tomoyo.h>
+/***** TOMOYO Linux end. *****/
 
 int sysctl_unix_max_dgram_qlen = 10;
 
@@ -645,6 +648,10 @@ static int unix_bind(struct socket *sock
                err = unix_autobind(sock);
                goto out;
        }
+       /***** TOMOYO Linux start. *****/
+       err = -EPERM;
+       if (sunaddr->sun_path[0] && CheckCapabilityACL(TOMOYO_CREATE_UNIX_SOCKET)) goto out;
+       /***** TOMOYO Linux end. *****/
 
        err = unix_mkname(sunaddr, addr_len, &hash);
        if (err < 0)
@@ -709,6 +716,9 @@ static int unix_bind(struct socket *sock
                 * All right, let's create it.
                 */
                mode = S_IFSOCK | (sock->inode->i_mode & ~current->fs->umask);
+               /***** TOMOYO Linux start. *****/
+               if ((err = pre_vfs_mknod(nd.dentry->d_inode, dentry)) == 0 && (err = CheckSingleWritePermission(TYPE_MKSOCK_ACL, dentry, nd.mnt)) == 0)
+               /***** TOMOYO Linux end. *****/
                err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0);
                if (err)
                        goto out_mknod_dput;