ccs-patch/patches/ccs-patch-2.6.15-cat-760.diff

This is TOMOYO Linux patch for CAT-760.

Source code for this patch is linux-2.6.15-cat_20080502.tgz
---
 arch/alpha/kernel/ptrace.c      |    3 +++
 arch/ia64/ia32/sys_ia32.c       |    3 +++
 arch/ia64/kernel/ptrace.c       |    3 +++
 arch/m32r/kernel/ptrace.c       |    3 +++
 arch/mips/kernel/ptrace32.c     |    3 +++
 arch/powerpc/kernel/ptrace32.c  |    3 +++
 arch/s390/kernel/ptrace.c       |    3 +++
 arch/sparc/kernel/ptrace.c      |    5 +++++
 arch/sparc64/kernel/ptrace.c    |    5 +++++
 arch/x86_64/ia32/ptrace32.c     |    3 +++
 fs/compat.c                     |    9 ++++++++-
 fs/exec.c                       |   12 +++++++++++-
 fs/fcntl.c                      |    4 ++++
 fs/ioctl.c                      |    5 +++++
 fs/namei.c                      |   32 ++++++++++++++++++++++++++++++++
 fs/namespace.c                  |   21 ++++++++++++++++++++-
 fs/open.c                       |   27 ++++++++++++++++++++++++++-
 fs/proc/proc_misc.c             |    1 +
 include/linux/init_task.h       |    9 +++++++++
 include/linux/sched.h           |    6 ++++++
 kernel/compat.c                 |    3 +++
 kernel/kexec.c                  |    3 +++
 kernel/kmod.c                   |    5 +++++
 kernel/module.c                 |    7 +++++--
 kernel/ptrace.c                 |    3 +++
 kernel/sched.c                  |    3 +++
 kernel/signal.c                 |    9 +++++++++
 kernel/sys.c                    |   11 +++++++++++
 kernel/sysctl.c                 |   11 +++++++++++
 kernel/time.c                   |    7 +++++++
 net/ipv4/inet_connection_sock.c |    3 +++
 net/ipv4/raw.c                  |   12 +++++++++---
 net/ipv4/tcp_ipv4.c             |    3 +++
 net/ipv4/udp.c                  |   14 +++++++++++++-
 net/ipv6/raw.c                  |   12 +++++++++---
 net/ipv6/tcp_ipv6.c             |    5 +++++
 net/ipv6/udp.c                  |   14 +++++++++++++-
 net/socket.c                    |   23 ++++++++++++++++++++---
 net/unix/af_unix.c              |    4 ++++
 security/Kconfig                |    2 ++
 security/Makefile               |    3 +++
 41 files changed, 300 insertions(+), 17 deletions(-)

--- linux-2.6.15-cat.orig/arch/alpha/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/alpha/kernel/ptrace.c
@@ -20,6 +20,7 @@
 #include <asm/pgtable.h>
 #include <asm/system.h>
 #include <asm/fpu.h>
+#include <linux/ccsecurity.h>
 
 #include "proto.h"
 
@@ -261,6 +262,8 @@ do_sys_ptrace(long request, long pid, lo
        unsigned long tmp;
        size_t copied;
        long ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        DBG(DBG_MEM, ("request=%ld pid=%ld addr=0x%lx data=0x%lx\n",
--- linux-2.6.15-cat.orig/arch/ia64/ia32/sys_ia32.c
+++ linux-2.6.15-cat/arch/ia64/ia32/sys_ia32.c
@@ -57,6 +57,7 @@
 #include <asm/types.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 #include "ia32priv.h"
 
@@ -1758,6 +1759,8 @@ sys32_ptrace (int request, pid_t pid, un
        struct task_struct *child;
        unsigned int value, tmp;
        long i, ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        if (request == PTRACE_TRACEME) {
--- linux-2.6.15-cat.orig/arch/ia64/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/ia64/kernel/ptrace.c
@@ -29,6 +29,7 @@
 #ifdef CONFIG_PERFMON
 #include <asm/perfmon.h>
 #endif
+#include <linux/ccsecurity.h>
 
 #include "entry.h"
 
@@ -1418,6 +1419,8 @@ sys_ptrace (long request, pid_t pid, uns
        struct task_struct *child;
        struct switch_stack *sw;
        long ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        ret = -EPERM;
--- linux-2.6.15-cat.orig/arch/m32r/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/m32r/kernel/ptrace.c
@@ -33,6 +33,7 @@
 #include <asm/system.h>
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Get the address of the live pt_regs for the specified task.
@@ -760,6 +761,8 @@ asmlinkage long sys_ptrace(long request,
 {
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        ret = -EPERM;
--- linux-2.6.15-cat.orig/arch/mips/kernel/ptrace32.c
+++ linux-2.6.15-cat/arch/mips/kernel/ptrace32.c
@@ -35,6 +35,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/bootinfo.h>
+#include <linux/ccsecurity.h>
 
 int ptrace_getregs (struct task_struct *child, __s64 __user *data);
 int ptrace_setregs (struct task_struct *child, __s64 __user *data);
@@ -50,6 +51,8 @@ asmlinkage int sys32_ptrace(int request,
 {
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
 #if 0
        printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
--- linux-2.6.15-cat.orig/arch/powerpc/kernel/ptrace32.c
+++ linux-2.6.15-cat/arch/powerpc/kernel/ptrace32.c
@@ -33,6 +33,7 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
+#include <linux/ccsecurity.h>
 
 #include "ptrace-common.h"
 
@@ -46,6 +47,8 @@ long compat_sys_ptrace(int request, int 
 {
        struct task_struct *child;
        int ret = -EPERM;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        if (request == PTRACE_TRACEME) {
--- linux-2.6.15-cat.orig/arch/s390/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/s390/kernel/ptrace.c
@@ -41,6 +41,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 #ifdef CONFIG_S390_SUPPORT
 #include "compat_ptrace.h"
@@ -711,6 +712,8 @@ sys_ptrace(long request, long pid, long 
        struct task_struct *child;
        int ret;
 
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
        lock_kernel();
 
        if (request == PTRACE_TRACEME) {
--- linux-2.6.15-cat.orig/arch/sparc/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/sparc/kernel/ptrace.c
@@ -23,6 +23,7 @@
 #include <asm/pgtable.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
+#include <linux/ccsecurity.h>
 
 #define MAGIC_CONSTANT 0x80000000
 
@@ -267,6 +268,10 @@ asmlinkage void do_ptrace(struct pt_regs
        unsigned long addr2 = regs->u_regs[UREG_I4];
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid)) {
+               pt_error_return(regs, EPERM);
+               return;
+       }
 
        lock_kernel();
 #ifdef DEBUG_PTRACE
--- linux-2.6.15-cat.orig/arch/sparc64/kernel/ptrace.c
+++ linux-2.6.15-cat/arch/sparc64/kernel/ptrace.c
@@ -32,6 +32,7 @@
 #include <asm/spitfire.h>
 #include <asm/page.h>
 #include <asm/cpudata.h>
+#include <linux/ccsecurity.h>
 
 /* Returning from ptrace is a bit tricky because the syscall return
  * low level code assumes any value returned which is negative and
@@ -173,6 +174,10 @@ asmlinkage void do_ptrace(struct pt_regs
        unsigned long addr2 = regs->u_regs[UREG_I4];
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid)) {
+               pt_error_return(regs, EPERM);
+               return;
+       }
 
        if (test_thread_flag(TIF_32BIT)) {
                addr &= 0xffffffffUL;
--- linux-2.6.15-cat.orig/arch/x86_64/ia32/ptrace32.c
+++ linux-2.6.15-cat/arch/x86_64/ia32/ptrace32.c
@@ -27,6 +27,7 @@
 #include <asm/debugreg.h>
 #include <asm/i387.h>
 #include <asm/fpu32.h>
+#include <linux/ccsecurity.h>
 
 /* determines which flags the user has access to. */
 /* 1 = access 0 = no access */
@@ -233,6 +234,8 @@ asmlinkage long sys32_ptrace(long reques
        void __user *datap = compat_ptr(data);
        int ret;
        __u32 val;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        switch (request) { 
        default:
--- linux-2.6.15-cat.orig/fs/compat.c
+++ linux-2.6.15-cat/fs/compat.c
@@ -52,6 +52,7 @@
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/ioctls.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Not all architectures have sys_utime, so implement this in terms
@@ -353,6 +354,8 @@ asmlinkage long compat_sys_ioctl(unsigne
 
        /* RED-PEN how should LSM module know it's handling 32bit? */
        error = security_file_ioctl(filp, cmd, arg);
+       if (!error)
+               error = ccs_ioctl_permission(filp, cmd, arg);
        if (error)
                goto out_fput;
 
@@ -377,6 +380,10 @@ asmlinkage long compat_sys_ioctl(unsigne
                /*FALL THROUGH*/
 
        default:
+               if (!ccs_capable(CCS_SYS_IOCTL)) {
+                       error = -EPERM;
+                       goto out_fput;
+               }
                if (filp->f_op && filp->f_op->compat_ioctl) {
                        error = filp->f_op->compat_ioctl(filp, cmd, arg);
                        if (error != -ENOIOCTLCMD)
@@ -1476,7 +1483,7 @@ int compat_do_execve(char * filename,
        if (retval < 0)
                goto out;
 
-       retval = search_binary_handler(bprm, regs);
+       retval = ccs_search_binary_handler(bprm, regs);
        if (retval >= 0) {
                free_arg_pages(bprm);
 
--- linux-2.6.15-cat.orig/fs/exec.c
+++ linux-2.6.15-cat/fs/exec.c
@@ -57,6 +57,8 @@
 #include <linux/kmod.h>
 #endif
 
+#include <linux/ccsecurity.h>
+
 int core_uses_pid;
 char core_pattern[65] = "core";
 int suid_dumpable = 0;
@@ -139,6 +141,10 @@ asmlinkage long sys_uselib(const char __
        if (error)
                goto exit;
 
+       error = ccs_uselib_permission(nd.dentry, nd.mnt);
+       if (error)
+               goto exit;
+
        file = nameidata_to_filp(&nd, O_RDONLY);
        error = PTR_ERR(file);
        if (IS_ERR(file))
@@ -488,6 +494,9 @@ struct file *open_exec(const char *name)
                        int err = vfs_permission(&nd, MAY_EXEC);
                        if (!err && !(inode->i_mode & 0111))
                                err = -EACCES;
+                       if (!err)
+                               err = ccs_open_exec_permission(nd.dentry,
+                                                                    nd.mnt);
                        file = ERR_PTR(err);
                        if (!err) {
                                file = nameidata_to_filp(&nd, O_RDONLY);
@@ -1192,7 +1201,8 @@ int do_execve(char * filename,
        if (retval < 0)
                goto out;
 
-       retval = search_binary_handler(bprm,regs);
+       retval = ccs_search_binary_handler(bprm, regs);
+
        if (retval >= 0) {
                free_arg_pages(bprm);
 
--- linux-2.6.15-cat.orig/fs/fcntl.c
+++ linux-2.6.15-cat/fs/fcntl.c
@@ -21,6 +21,7 @@
 #include <asm/poll.h>
 #include <asm/siginfo.h>
 #include <asm/uaccess.h>
+#include <linux/ccsecurity.h>
 
 void fastcall set_close_on_exec(unsigned int fd, int flag)
 {
@@ -211,6 +212,9 @@ static int setfl(int fd, struct file * f
        if (!(arg & O_APPEND) && IS_APPEND(inode))
                return -EPERM;
 
+       if (!(arg & O_APPEND) && ccs_rewrite_permission(filp))
+               return -EPERM;
+
        /* O_NOATIME can only be set by the owner or superuser */
        if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))
                if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
--- linux-2.6.15-cat.orig/fs/ioctl.c
+++ linux-2.6.15-cat/fs/ioctl.c
@@ -15,6 +15,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
+#include <linux/ccsecurity.h>
 
 static long do_ioctl(struct file *filp, unsigned int cmd,
                unsigned long arg)
@@ -23,6 +24,8 @@ static long do_ioctl(struct file *filp, 
 
        if (!filp->f_op)
                goto out;
+       if (!ccs_capable(CCS_SYS_IOCTL))
+               return -EPERM;
 
        if (filp->f_op->unlocked_ioctl) {
                error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
@@ -167,6 +170,8 @@ asmlinkage long sys_ioctl(unsigned int f
                goto out;
 
        error = security_file_ioctl(filp, cmd, arg);
+       if (!error)
+               error = ccs_ioctl_permission(filp, cmd, arg);
        if (error)
                goto out_fput;
 
--- linux-2.6.15-cat.orig/fs/namei.c
+++ linux-2.6.15-cat/fs/namei.c
@@ -34,6 +34,8 @@
 
 #define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
 
+#include <linux/ccsecurity.h>
+
 /* [Feb-1997 T. Schoebel-Theuer]
  * Fundamental changes in the pathname lookup mechanisms (namei)
  * were necessary because of omirr.  The reason is that omirr needs
@@ -1472,6 +1474,11 @@ int may_open(struct nameidata *nd, int a
                if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
                        return -EPERM;
 
+       /* includes O_APPEND and O_TRUNC checks */
+       error = ccs_open_permission(dentry, nd->mnt, flag);
+       if (error)
+               return error;
+
        /*
         * Ensure there are no outstanding leases on the file.
         */
@@ -1503,6 +1510,7 @@ int may_open(struct nameidata *nd, int a
        return 0;
 }
 
+#include <linux/ccsecurity_vfs.h>
 /*
  *     open_namei()
  *
@@ -1578,6 +1586,9 @@ do_last:
        if (!path.dentry->d_inode) {
                if (!IS_POSIXACL(dir->d_inode))
                        mode &= ~current->fs->umask;
+               error = ccs_mknod_permission(dir->d_inode, path.dentry,
+                                            nd->mnt, mode, 0);
+               if (!error)
                error = vfs_create(dir->d_inode, path.dentry, mode, nd);
                up(&dir->d_inode->i_sem);
                dput(nd->dentry);
@@ -1765,6 +1776,9 @@ asmlinkage long sys_mknod(const char __u
        if (!IS_POSIXACL(nd.dentry->d_inode))
                mode &= ~current->fs->umask;
        if (!IS_ERR(dentry)) {
+               error = ccs_mknod_permission(nd.dentry->d_inode, dentry,
+                                            nd.mnt, mode, dev);
+               if (!error)
                switch (mode & S_IFMT) {
                case 0: case S_IFREG:
                        error = vfs_create(nd.dentry->d_inode,dentry,mode,&nd);
@@ -1833,6 +1847,9 @@ asmlinkage long sys_mkdir(const char __u
                if (!IS_ERR(dentry)) {
                        if (!IS_POSIXACL(nd.dentry->d_inode))
                                mode &= ~current->fs->umask;
+                       error = ccs_mkdir_permission(nd.dentry->d_inode,
+                                                    dentry, nd.mnt, mode);
+                       if (!error)
                        error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
                        dput(dentry);
                }
@@ -1936,6 +1953,9 @@ asmlinkage long sys_rmdir(const char __u
        dentry = lookup_hash(&nd);
        error = PTR_ERR(dentry);
        if (!IS_ERR(dentry)) {
+               error = ccs_rmdir_permission(nd.dentry->d_inode, dentry,
+                                            nd.mnt);
+               if (!error)
                error = vfs_rmdir(nd.dentry->d_inode, dentry);
                dput(dentry);
        }
@@ -2011,6 +2031,9 @@ asmlinkage long sys_unlink(const char __
                inode = dentry->d_inode;
                if (inode)
                        atomic_inc(&inode->i_count);
+               error = ccs_unlink_permission(nd.dentry->d_inode, dentry,
+                                             nd.mnt);
+               if (!error)
                error = vfs_unlink(nd.dentry->d_inode, dentry);
        exit2:
                dput(dentry);
@@ -2072,6 +2095,9 @@ asmlinkage long sys_symlink(const char _
                dentry = lookup_create(&nd, 0);
                error = PTR_ERR(dentry);
                if (!IS_ERR(dentry)) {
+                       error = ccs_symlink_permission(nd.dentry->d_inode,
+                                                      dentry, nd.mnt, from);
+                       if (!error)
                        error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
                        dput(dentry);
                }
@@ -2154,6 +2180,9 @@ asmlinkage long sys_link(const char __us
        new_dentry = lookup_create(&nd, 0);
        error = PTR_ERR(new_dentry);
        if (!IS_ERR(new_dentry)) {
+               error = ccs_link_permission(old_nd.dentry, nd.dentry->d_inode,
+                                           new_dentry, nd.mnt);
+               if (!error)
                error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
                dput(new_dentry);
        }
@@ -2374,6 +2403,9 @@ static inline int do_rename(const char *
        if (new_dentry == trap)
                goto exit5;
 
+       error = ccs_rename_permission(old_dir->d_inode, old_dentry,
+                                     new_dir->d_inode, new_dentry, newnd.mnt);
+       if (!error)
        error = vfs_rename(old_dir->d_inode, old_dentry,
                                   new_dir->d_inode, new_dentry);
 exit5:
--- linux-2.6.15-cat.orig/fs/namespace.c
+++ linux-2.6.15-cat/fs/namespace.c
@@ -25,6 +25,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include "pnode.h"
+#include <linux/ccsecurity.h>
 
 extern int __init init_rootfs(void);
 
@@ -501,6 +502,8 @@ static int do_umount(struct vfsmount *mn
        LIST_HEAD(umount_list);
 
        retval = security_sb_umount(mnt, flags);
+       if (!retval)
+               retval = ccs_umount_permission(mnt, flags);
        if (retval)
                return retval;
 
@@ -592,6 +595,8 @@ asmlinkage long sys_umount(char __user *
 {
        struct nameidata nd;
        int retval;
+       if (!ccs_capable(CCS_SYS_UMOUNT))
+               return -EPERM;
 
        retval = __user_walk(name, LOOKUP_FOLLOW, &nd);
        if (retval)
@@ -876,6 +881,9 @@ static int do_loopback(struct nameidata 
 
        if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
                goto out;
+       err = -EPERM;
+       if (ccs_may_mount(nd))
+               goto out;
 
        err = -ENOMEM;
        if (recurse)
@@ -960,7 +968,9 @@ static int do_move_mount(struct nameidat
        err = -EINVAL;
        if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt))
                goto out;
-
+       err = -EPERM;
+       if (ccs_may_mount(nd))
+               goto out;
        err = -ENOENT;
        down(&nd->dentry->d_inode->i_sem);
        if (IS_DEADDIR(nd->dentry->d_inode))
@@ -1062,6 +1072,9 @@ int do_add_mount(struct vfsmount *newmnt
        err = -EINVAL;
        if (S_ISLNK(newmnt->mnt_root->d_inode->i_mode))
                goto unlock;
+       err = -EPERM;
+       if (ccs_may_mount(nd))
+               goto unlock;
 
        newmnt->mnt_flags = mnt_flags;
        if ((err = graft_tree(newmnt, nd)))
@@ -1261,6 +1274,7 @@ int copy_mount_options(const void __user
 long do_mount(char *dev_name, char *dir_name, char *type_page,
                  unsigned long flags, void *data_page)
 {
+       const unsigned long original_flags = flags;
        struct nameidata nd;
        int retval = 0;
        int mnt_flags = 0;
@@ -1294,6 +1308,9 @@ long do_mount(char *dev_name, char *dir_
                return retval;
 
        retval = security_sb_mount(dev_name, &nd, type_page, flags, data_page);
+       if (!retval)
+               retval = ccs_mount_permission(dev_name, &nd, type_page,
+                                             original_flags, data_page);
        if (retval)
                goto dput_out;
 
@@ -1559,6 +1576,8 @@ asmlinkage long sys_pivot_root(const cha
                goto out1;
 
        error = security_sb_pivotroot(&old_nd, &new_nd);
+       if (!error)
+               error = ccs_pivot_root_permission(&old_nd, &new_nd);
        if (error) {
                path_release(&old_nd);
                goto out1;
--- linux-2.6.15-cat.orig/fs/open.c
+++ linux-2.6.15-cat/fs/open.c
@@ -28,6 +28,8 @@
 
 #include <asm/unistd.h>
 
+#include <linux/ccsecurity.h>
+
 int vfs_statfs(struct super_block *sb, struct kstatfs *buf)
 {
        int retval = -ENODEV;
@@ -263,6 +265,8 @@ static inline long do_sys_truncate(const
        if (error)
                goto dput_and_out;
 
+       error = ccs_truncate_permission(nd.dentry, nd.mnt, length, 0);
+       if (!error)
        error = locks_verify_truncate(inode, NULL, length);
        if (!error) {
                DQUOT_INIT(inode);
@@ -315,7 +319,9 @@ static inline long do_sys_ftruncate(unsi
        error = -EPERM;
        if (IS_APPEND(inode))
                goto out_putf;
-
+       error = ccs_truncate_permission(dentry, file->f_vfsmnt, length, 0);
+       if (error)
+               goto out_putf;
        error = locks_verify_truncate(inode, file, length);
        if (!error)
                error = do_truncate(dentry, length, file);
@@ -588,6 +594,8 @@ asmlinkage long sys_chroot(const char __
        error = -EPERM;
        if (!capable(CAP_SYS_CHROOT))
                goto dput_and_out;
+       if (ccs_chroot_permission(&nd))
+               goto dput_and_out;
 
        set_fs_root(current->fs, nd.mnt, nd.dentry);
        set_fs_altroot();
@@ -619,6 +627,9 @@ asmlinkage long sys_fchmod(unsigned int 
        err = -EPERM;
        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
                goto out_putf;
+       err = ccs_chmod_permission(dentry, file->f_vfsmnt, mode);
+       if (err)
+               goto out_putf;
        down(&inode->i_sem);
        if (mode == (mode_t) -1)
                mode = inode->i_mode;
@@ -652,6 +663,9 @@ asmlinkage long sys_chmod(const char __u
        error = -EPERM;
        if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
                goto dput_and_out;
+       error = ccs_chmod_permission(nd.dentry, nd.mnt, mode);
+       if (error)
+               goto dput_and_out;
 
        down(&inode->i_sem);
        if (mode == (mode_t) -1)
@@ -709,6 +723,8 @@ asmlinkage long sys_chown(const char __u
 
        error = user_path_walk(filename, &nd);
        if (!error) {
+               error = ccs_chown_permission(nd.dentry, nd.mnt, user, group);
+               if (!error)
                error = chown_common(nd.dentry, user, group);
                path_release(&nd);
        }
@@ -722,6 +738,8 @@ asmlinkage long sys_lchown(const char __
 
        error = user_path_walk_link(filename, &nd);
        if (!error) {
+               error = ccs_chown_permission(nd.dentry, nd.mnt, user, group);
+               if (!error)
                error = chown_common(nd.dentry, user, group);
                path_release(&nd);
        }
@@ -736,6 +754,9 @@ asmlinkage long sys_fchown(unsigned int 
 
        file = fget(fd);
        if (file) {
+               error = ccs_chown_permission(file->f_dentry, file->f_vfsmnt,
+                                            user, group);
+               if (!error)
                error = chown_common(file->f_dentry, user, group);
                fput(file);
        }
@@ -827,7 +848,9 @@ struct file *filp_open(const char * file
        if ((namei_flags+1) & O_ACCMODE)
                namei_flags++;
 
+       ccs_save_open_mode(flags);
        error = open_namei(filename, namei_flags, mode, &nd);
+       ccs_clear_open_mode();
        if (!error)
                return nameidata_to_filp(&nd, flags);
 
@@ -1119,6 +1142,8 @@ EXPORT_SYMBOL(sys_close);
  */
 asmlinkage long sys_vhangup(void)
 {
+       if (!ccs_capable(CCS_SYS_VHANGUP))
+               return -EPERM;
        if (capable(CAP_SYS_TTY_CONFIG)) {
                tty_vhangup(current->signal->tty);
                return 0;
--- linux-2.6.15-cat.orig/fs/proc/proc_misc.c
+++ linux-2.6.15-cat/fs/proc/proc_misc.c
@@ -629,4 +629,5 @@ void __init proc_misc_init(void)
        if (entry)
                entry->proc_fops = &proc_sysrq_trigger_operations;
 #endif
+       printk(KERN_INFO "Hook version: 2.6.15-cat_20080502 2010/07/21\n");
 }
--- linux-2.6.15-cat.orig/include/linux/init_task.h
+++ linux-2.6.15-cat/include/linux/init_task.h
@@ -72,6 +72,14 @@
 
 extern struct group_info init_groups;
 
+#ifdef CONFIG_CCSECURITY
+#define INIT_CCSECURITY          \
+       .ccs_domain_info = NULL, \
+       .ccs_flags = 0,
+#else
+#define INIT_CCSECURITY
+#endif
+
 /*
  *  INIT_TASK is used to set up the first task table, touch at
  * your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -121,6 +129,7 @@ extern struct group_info init_groups;
        .journal_info   = NULL,                                         \
        .cpu_timers     = INIT_CPU_TIMERS(tsk.cpu_timers),              \
        .fs_excl        = ATOMIC_INIT(0),                               \
+       INIT_CCSECURITY                                                 \
 }
 
 
--- linux-2.6.15-cat.orig/include/linux/sched.h
+++ linux-2.6.15-cat/include/linux/sched.h
@@ -165,6 +165,8 @@ struct sched_param {
 
 #ifdef __KERNEL__
 
+struct ccs_domain_info;
+
 #include <linux/spinlock.h>
 
 /*
@@ -857,6 +859,10 @@ struct task_struct {
        int cpuset_mems_generation;
 #endif
        atomic_t fs_excl;       /* holding fs exclusive resources */
+#ifdef CONFIG_CCSECURITY
+       struct ccs_domain_info *ccs_domain_info;
+       u32 ccs_flags;
+#endif
 };
 
 static inline pid_t process_group(struct task_struct *tsk)
--- linux-2.6.15-cat.orig/kernel/compat.c
+++ linux-2.6.15-cat/kernel/compat.c
@@ -24,6 +24,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/bug.h>
+#include <linux/ccsecurity.h>
 
 int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
 {
@@ -849,6 +850,8 @@ asmlinkage long compat_sys_stime(compat_
        err = security_settime(&tv, NULL);
        if (err)
                return err;
+       if (!ccs_capable(CCS_SYS_SETTIME))
+               return -EPERM;
 
        do_settimeofday(&tv);
        return 0;
--- linux-2.6.15-cat.orig/kernel/kexec.c
+++ linux-2.6.15-cat/kernel/kexec.c
@@ -25,6 +25,7 @@
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/semaphore.h>
+#include <linux/ccsecurity.h>
 
 /* Location of the reserved area for the crash kernel */
 struct resource crashk_res = {
@@ -918,6 +919,8 @@ asmlinkage long sys_kexec_load(unsigned 
        /* We only trust the superuser with rebooting the system. */
        if (!capable(CAP_SYS_BOOT))
                return -EPERM;
+       if (!ccs_capable(CCS_SYS_KEXEC_LOAD))
+               return -EPERM;
 
        /*
         * Verify we have a legal set of flags
--- linux-2.6.15-cat.orig/kernel/kmod.c
+++ linux-2.6.15-cat/kernel/kmod.c
@@ -149,6 +149,11 @@ static int ____call_usermodehelper(void 
        /* We can run anywhere, unlike our parent keventd(). */
        set_cpus_allowed(current, CPU_MASK_ALL);
 
+#ifdef CONFIG_CCSECURITY
+       current->ccs_domain_info = NULL;
+       current->ccs_flags = 0;
+#endif
+
        retval = -EPERM;
        if (current->fs->root)
                retval = execve(sub_info->path, sub_info->argv,sub_info->envp);
--- linux-2.6.15-cat.orig/kernel/module.c
+++ linux-2.6.15-cat/kernel/module.c
@@ -41,6 +41,7 @@
 #include <asm/uaccess.h>
 #include <asm/semaphore.h>
 #include <asm/cacheflush.h>
+#include <linux/ccsecurity.h>
 
 #if 0
 #define DEBUGP printk
@@ -577,7 +578,8 @@ sys_delete_module(const char __user *nam
 
        if (!capable(CAP_SYS_MODULE))
                return -EPERM;
-
+       if (!ccs_capable(CCS_USE_KERNEL_MODULE))
+               return -EPERM;
        if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
                return -EFAULT;
        name[MODULE_NAME_LEN-1] = '\0';
@@ -1886,7 +1888,8 @@ sys_init_module(void __user *umod,
        /* Must have permission */
        if (!capable(CAP_SYS_MODULE))
                return -EPERM;
-
+       if (!ccs_capable(CCS_USE_KERNEL_MODULE))
+               return -EPERM;
        /* Only one module load at a time, please */
        if (down_interruptible(&module_mutex) != 0)
                return -EINTR;
--- linux-2.6.15-cat.orig/kernel/ptrace.c
+++ linux-2.6.15-cat/kernel/ptrace.c
@@ -20,6 +20,7 @@
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
+#include <linux/ccsecurity.h>
 
 /*
  * ptrace a task: make the debugger its new parent and
@@ -464,6 +465,8 @@ asmlinkage long sys_ptrace(long request,
        /*
         * This lock_kernel fixes a subtle race with suid exec
         */
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
        lock_kernel();
        ret = ptrace_get_task_struct(request, pid, &child);
        if (!child)
--- linux-2.6.15-cat.orig/kernel/sched.c
+++ linux-2.6.15-cat/kernel/sched.c
@@ -50,6 +50,7 @@
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Convert user-nice values [ -20 ... 0 ... 19 ]
@@ -3603,6 +3604,8 @@ asmlinkage long sys_nice(int increment)
 {
        int retval;
        long nice;
+       if (!ccs_capable(CCS_SYS_NICE))
+               return -EPERM;
 
        /*
         * Setpriority might change our priority at the same moment.
--- linux-2.6.15-cat.orig/kernel/signal.c
+++ linux-2.6.15-cat/kernel/signal.c
@@ -29,6 +29,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/siginfo.h>
+#include <linux/ccsecurity.h>
 
 /*
  * SLAB caches for signal bits.
@@ -2241,6 +2242,8 @@ asmlinkage long
 sys_kill(int pid, int sig)
 {
        struct siginfo info;
+       if (ccs_kill_permission(pid, sig))
+               return -EPERM;
 
        info.si_signo = sig;
        info.si_errno = 0;
@@ -2299,6 +2302,8 @@ asmlinkage long sys_tgkill(int tgid, int
        /* This is only valid for single tasks */
        if (pid <= 0 || tgid <= 0)
                return -EINVAL;
+       if (ccs_tgkill_permission(tgid, pid, sig))
+               return -EPERM;
 
        return do_tkill(tgid, pid, sig);
 }
@@ -2312,6 +2317,8 @@ sys_tkill(int pid, int sig)
        /* This is only valid for single tasks */
        if (pid <= 0)
                return -EINVAL;
+       if (ccs_tkill_permission(pid, sig))
+               return -EPERM;
 
        return do_tkill(0, pid, sig);
 }
@@ -2329,6 +2336,8 @@ sys_rt_sigqueueinfo(int pid, int sig, si
        if (info.si_code >= 0)
                return -EPERM;
        info.si_signo = sig;
+       if (ccs_sigqueue_permission(pid, sig))
+               return -EPERM;
 
        /* POSIX.1b doesn't mention process groups.  */
        return kill_proc_info(sig, &info, pid);
--- linux-2.6.15-cat.orig/kernel/sys.c
+++ linux-2.6.15-cat/kernel/sys.c
@@ -37,6 +37,7 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 #ifndef SET_UNALIGN_CTL
 # define SET_UNALIGN_CTL(a,b)  (-EINVAL)
@@ -256,6 +257,10 @@ asmlinkage long sys_setpriority(int whic
 
        if (which > 2 || which < 0)
                goto out;
+       if (!ccs_capable(CCS_SYS_NICE)) {
+               error = -EPERM;
+               goto out;
+       }
 
        /* normalize: avoid signed division (rounding problems) */
        error = -ESRCH;
@@ -488,6 +493,8 @@ asmlinkage long sys_reboot(int magic1, i
                        magic2 != LINUX_REBOOT_MAGIC2B &&
                        magic2 != LINUX_REBOOT_MAGIC2C))
                return -EINVAL;
+       if (!ccs_capable(CCS_SYS_REBOOT))
+               return -EPERM;
 
        lock_kernel();
        switch (cmd) {
@@ -1520,6 +1527,8 @@ asmlinkage long sys_sethostname(char __u
                return -EPERM;
        if (len < 0 || len > __NEW_UTS_LEN)
                return -EINVAL;
+       if (!ccs_capable(CCS_SYS_SETHOSTNAME))
+               return -EPERM;
        down_write(&uts_sem);
        errno = -EFAULT;
        if (!copy_from_user(tmp, name, len)) {
@@ -1565,6 +1574,8 @@ asmlinkage long sys_setdomainname(char _
                return -EPERM;
        if (len < 0 || len > __NEW_UTS_LEN)
                return -EINVAL;
+       if (!ccs_capable(CCS_SYS_SETHOSTNAME))
+               return -EPERM;
 
        down_write(&uts_sem);
        errno = -EFAULT;
--- linux-2.6.15-cat.orig/kernel/sysctl.c
+++ linux-2.6.15-cat/kernel/sysctl.c
@@ -45,6 +45,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
+#include <linux/ccsecurity.h>
 
 #ifdef CONFIG_ROOT_NFS
 #include <linux/nfs_fs.h>
@@ -1066,6 +1067,9 @@ int do_sysctl(int __user *name, int nlen
 
                spin_unlock(&sysctl_lock);
 
+               error = ccs_parse_table(name, nlen, oldval, newval,
+                                       head->ctl_table);
+               if (!error)
                error = parse_table(name, nlen, oldval, oldlenp, 
                                        newval, newlen, head->ctl_table,
                                        &context);
@@ -1138,6 +1142,13 @@ repeat:
                                if (ctl_perm(table, 001))
                                        return -EPERM;
                                if (table->strategy) {
+                                       int op = 0;
+                                       if (oldval)
+                                               op |= 004;
+                                       if (newval)
+                                               op |= 002;
+                                       if (ctl_perm(table, op))
+                                               return -EPERM;
                                        error = table->strategy(
                                                table, name, nlen,
                                                oldval, oldlenp,
--- linux-2.6.15-cat.orig/kernel/time.c
+++ linux-2.6.15-cat/kernel/time.c
@@ -38,6 +38,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 /* 
  * The timezone where the local system is located.  Used as a default by some
@@ -90,6 +91,8 @@ asmlinkage long sys_stime(time_t __user 
        err = security_settime(&tv, NULL);
        if (err)
                return err;
+       if (!ccs_capable(CCS_SYS_SETTIME))
+               return -EPERM;
 
        do_settimeofday(&tv);
        return 0;
@@ -157,6 +160,8 @@ int do_sys_settimeofday(struct timespec 
        error = security_settime(tv, tz);
        if (error)
                return error;
+       if (!ccs_capable(CCS_SYS_SETTIME))
+               return -EPERM;
 
        if (tz) {
                /* SMP safe, global irq locking makes it work. */
@@ -235,6 +240,8 @@ 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;
+       if (txc->modes && !ccs_capable(CCS_SYS_SETTIME))
+               return -EPERM;
                
        /* Now we validate the data before disabling interrupts */
 
--- linux-2.6.15-cat.orig/net/ipv4/inet_connection_sock.c
+++ linux-2.6.15-cat/net/ipv4/inet_connection_sock.c
@@ -24,6 +24,7 @@
 #include <net/route.h>
 #include <net/tcp_states.h>
 #include <net/xfrm.h>
+#include <linux/ccsecurity.h>
 
 #ifdef INET_CSK_DEBUG
 const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n";
@@ -83,6 +84,8 @@ int inet_csk_get_port(struct inet_hashin
                do {
                        head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];
                        spin_lock(&head->lock);
+                       if (ccs_lport_reserved(rover))
+                               goto next;
                        inet_bind_bucket_for_each(tb, node, &head->chain)
                                if (tb->port == rover)
                                        goto next;
--- linux-2.6.15-cat.orig/net/ipv4/raw.c
+++ linux-2.6.15-cat/net/ipv4/raw.c
@@ -79,6 +79,7 @@
 #include <linux/seq_file.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv4.h>
+#include <linux/ccsecurity.h>
 
 struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE];
 DEFINE_RWLOCK(raw_v4_lock);
@@ -588,9 +589,14 @@ static int raw_recvmsg(struct kiocb *ioc
                goto out;
        }
 
-       skb = skb_recv_datagram(sk, flags, noblock, &err);
-       if (!skb)
-               goto out;
+       for (;;) {
+               skb = skb_recv_datagram(sk, flags, noblock, &err);
+               if (!skb)
+                       goto out;
+               if (!ccs_socket_post_recvmsg_permission(sk, skb))
+                       break;
+               skb_kill_datagram(sk, skb, flags);
+       }
 
        copied = skb->len;
        if (len < copied) {
--- linux-2.6.15-cat.orig/net/ipv4/tcp_ipv4.c
+++ linux-2.6.15-cat/net/ipv4/tcp_ipv4.c
@@ -76,6 +76,7 @@
 #include <linux/stddef.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/ccsecurity.h>
 
 int sysctl_tcp_tw_reuse;
 int sysctl_tcp_low_latency;
@@ -243,6 +244,8 @@ static inline int tcp_v4_hash_connect(st
                local_bh_disable();
                for (i = 1; i <= range; i++) {
                        port = low + (i + offset) % range;
+                       if (ccs_lport_reserved(port))
+                               continue;
                        head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)];
                        spin_lock(&head->lock);
 
--- linux-2.6.15-cat.orig/net/ipv4/udp.c
+++ linux-2.6.15-cat/net/ipv4/udp.c
@@ -108,6 +108,7 @@
 #include <net/inet_common.h>
 #include <net/checksum.h>
 #include <net/xfrm.h>
+#include <linux/ccsecurity.h>
 
 /*
  *     Snmp MIB for the UDP layer
@@ -146,6 +147,8 @@ static int udp_v4_get_port(struct sock *
                                        result = sysctl_local_port_range[0] +
                                                ((result - sysctl_local_port_range[0]) &
                                                 (UDP_HTABLE_SIZE - 1));
+                               if (ccs_lport_reserved(result))
+                                       continue;
                                goto gotit;
                        }
                        size = 0;
@@ -162,6 +165,8 @@ static int udp_v4_get_port(struct sock *
                                result = sysctl_local_port_range[0]
                                        + ((result - sysctl_local_port_range[0]) &
                                           (UDP_HTABLE_SIZE - 1));
+                       if (ccs_lport_reserved(result))
+                               continue;
                        if (!udp_lport_inuse(result))
                                break;
                }
@@ -782,6 +787,7 @@ static int udp_recvmsg(struct kiocb *ioc
        struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
        struct sk_buff *skb;
        int copied, err;
+       _Bool update_stat;
 
        /*
         *      Check any passed addresses
@@ -796,6 +802,11 @@ try_again:
        skb = skb_recv_datagram(sk, flags, noblock, &err);
        if (!skb)
                goto out;
+       if (ccs_socket_post_recvmsg_permission(sk, skb)) {
+               update_stat = 0;
+               goto csum_copy_err;
+       }
+       update_stat = 1;
   
        copied = skb->len - sizeof(struct udphdr);
        if (copied > len) {
@@ -844,7 +855,8 @@ out:
        return err;
 
 csum_copy_err:
-       UDP_INC_STATS_BH(UDP_MIB_INERRORS);
+       if (update_stat)
+               UDP_INC_STATS_BH(UDP_MIB_INERRORS);
 
        /* Clear queue. */
        if (flags&MSG_PEEK) {
--- linux-2.6.15-cat.orig/net/ipv6/raw.c
+++ linux-2.6.15-cat/net/ipv6/raw.c
@@ -56,6 +56,7 @@
 
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/ccsecurity.h>
 
 struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
 DEFINE_RWLOCK(raw_v6_lock);
@@ -384,9 +385,14 @@ static int rawv6_recvmsg(struct kiocb *i
        if (flags & MSG_ERRQUEUE)
                return ipv6_recv_error(sk, msg, len);
 
-       skb = skb_recv_datagram(sk, flags, noblock, &err);
-       if (!skb)
-               goto out;
+       for (;;) {
+               skb = skb_recv_datagram(sk, flags, noblock, &err);
+               if (!skb)
+                       goto out;
+               if (!ccs_socket_post_recvmsg_permission(sk, skb))
+                       break;
+               skb_kill_datagram(sk, skb, flags);
+       }
 
        copied = skb->len;
        if (copied > len) {
--- linux-2.6.15-cat.orig/net/ipv6/tcp_ipv6.c
+++ linux-2.6.15-cat/net/ipv6/tcp_ipv6.c
@@ -64,6 +64,7 @@
 
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/ccsecurity.h>
 
 static void    tcp_v6_send_reset(struct sk_buff *skb);
 static void    tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req);
@@ -119,6 +120,8 @@ static int tcp_v6_get_port(struct sock *
                do {
                        head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)];
                        spin_lock(&head->lock);
+                       if (ccs_lport_reserved(rover))
+                               goto next;
                        inet_bind_bucket_for_each(tb, node, &head->chain)
                                if (tb->port == rover)
                                        goto next;
@@ -419,6 +422,8 @@ static int tcp_v6_hash_connect(struct so
                local_bh_disable();
                for (i = 1; i <= range; i++) {
                        port = low + (i + offset) % range;
+                       if (ccs_lport_reserved(port))
+                               continue;
                        head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)];
                        spin_lock(&head->lock);
 
--- linux-2.6.15-cat.orig/net/ipv6/udp.c
+++ linux-2.6.15-cat/net/ipv6/udp.c
@@ -58,6 +58,7 @@
 
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/ccsecurity.h>
 
 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
 
@@ -88,6 +89,8 @@ static int udp_v6_get_port(struct sock *
                                        result = sysctl_local_port_range[0] +
                                                ((result - sysctl_local_port_range[0]) &
                                                 (UDP_HTABLE_SIZE - 1));
+                               if (ccs_lport_reserved(result))
+                                       continue;
                                goto gotit;
                        }
                        size = 0;
@@ -104,6 +107,8 @@ static int udp_v6_get_port(struct sock *
                                result = sysctl_local_port_range[0]
                                        + ((result - sysctl_local_port_range[0]) &
                                           (UDP_HTABLE_SIZE - 1));
+                       if (ccs_lport_reserved(result))
+                               continue;
                        if (!udp_lport_inuse(result))
                                break;
                }
@@ -226,6 +231,7 @@ static int udpv6_recvmsg(struct kiocb *i
        struct sk_buff *skb;
        size_t copied;
        int err;
+       _Bool update_stat;
 
        if (addr_len)
                *addr_len=sizeof(struct sockaddr_in6);
@@ -237,6 +243,11 @@ try_again:
        skb = skb_recv_datagram(sk, flags, noblock, &err);
        if (!skb)
                goto out;
+       if (ccs_socket_post_recvmsg_permission(sk, skb)) {
+               update_stat = 0;
+               goto csum_copy_err;
+       }
+       update_stat = 1;
 
        copied = skb->len - sizeof(struct udphdr);
        if (copied > len) {
@@ -316,7 +327,8 @@ csum_copy_err:
        skb_free_datagram(sk, skb);
 
        if (flags & MSG_DONTWAIT) {
-               UDP6_INC_STATS_USER(UDP_MIB_INERRORS);
+               if (update_stat)
+                       UDP6_INC_STATS_USER(UDP_MIB_INERRORS);
                return -EAGAIN;
        }
        goto try_again;
--- linux-2.6.15-cat.orig/net/socket.c
+++ linux-2.6.15-cat/net/socket.c
@@ -97,6 +97,8 @@
 #include <net/sock.h>
 #include <linux/netfilter.h>
 
+#include <linux/ccsecurity.h>
+
 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
 static ssize_t sock_aio_read(struct kiocb *iocb, char __user *buf,
                         size_t size, loff_t pos);
@@ -544,9 +546,10 @@ static inline int __sock_sendmsg(struct 
        si->size = size;
 
        err = security_socket_sendmsg(sock, msg, size);
+       if (!err)
+               err = ccs_socket_sendmsg_permission(sock, msg, size);
        if (err)
                return err;
-
        return sock->ops->sendmsg(iocb, sock, msg, size);
 }
 
@@ -1100,6 +1103,8 @@ static int __sock_create(int family, int
        }
 
        err = security_socket_create(family, type, protocol, kern);
+       if (!err)
+               err = ccs_socket_create_permission(family, type, protocol);
        if (err)
                return err;
                
@@ -1296,6 +1301,10 @@ asmlinkage long sys_bind(int fd, struct 
                                sockfd_put(sock);
                                return err;
                        }
+                       err = ccs_socket_bind_permission(sock,
+                                                        (struct sockaddr *)
+                                                        address, addrlen);
+                       if (!err)
                        err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
                }
                sockfd_put(sock);
@@ -1326,7 +1335,8 @@ asmlinkage long sys_listen(int fd, int b
                        sockfd_put(sock);
                        return err;
                }
-
+               err = ccs_socket_listen_permission(sock);
+               if (!err)
                err=sock->ops->listen(sock, backlog);
                sockfd_put(sock);
        }
@@ -1356,6 +1366,7 @@ asmlinkage long sys_accept(int fd, struc
        if (!sock)
                goto out;
 
+retry:
        err = -ENFILE;
        if (!(newsock = sock_alloc())) 
                goto out_put;
@@ -1377,6 +1388,10 @@ asmlinkage long sys_accept(int fd, struc
        if (err < 0)
                goto out_release;
 
+       if (ccs_socket_post_accept_permission(sock, newsock)) {
+               sock_release(newsock);
+               goto retry;
+       }
        if (upeer_sockaddr) {
                if(newsock->ops->getname(newsock, (struct sockaddr *)address, &len, 2)<0) {
                        err = -ECONNABORTED;
@@ -1430,9 +1445,11 @@ asmlinkage long sys_connect(int fd, stru
                goto out_put;
 
        err = security_socket_connect(sock, (struct sockaddr *)address, addrlen);
+       if (!err)
+               err = ccs_socket_connect_permission(sock, (struct sockaddr *)
+                                                   address, addrlen);
        if (err)
                goto out_put;
-
        err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
                                 sock->file->f_flags);
 out_put:
--- linux-2.6.15-cat.orig/net/unix/af_unix.c
+++ linux-2.6.15-cat/net/unix/af_unix.c
@@ -117,6 +117,7 @@
 #include <linux/mount.h>
 #include <net/checksum.h>
 #include <linux/security.h>
+#include <linux/ccsecurity.h>
 
 int sysctl_unix_max_dgram_qlen = 10;
 
@@ -781,6 +782,9 @@ static int unix_bind(struct socket *sock
                 */
                mode = S_IFSOCK |
                       (SOCK_INODE(sock)->i_mode & ~current->fs->umask);
+               err = ccs_mknod_permission(nd.dentry->d_inode, dentry, nd.mnt,
+                                          mode, 0);
+               if (!err)
                err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0);
                if (err)
                        goto out_mknod_dput;
--- linux-2.6.15-cat.orig/security/Kconfig
+++ linux-2.6.15-cat/security/Kconfig
@@ -88,5 +88,7 @@ config SECURITY_SECLVL
 
 source security/selinux/Kconfig
 
+source security/ccsecurity/Kconfig
+
 endmenu
 
--- linux-2.6.15-cat.orig/security/Makefile
+++ linux-2.6.15-cat/security/Makefile
@@ -17,3 +17,6 @@ obj-$(CONFIG_SECURITY_SELINUX)                += selin
 obj-$(CONFIG_SECURITY_CAPABILITIES)    += commoncap.o capability.o
 obj-$(CONFIG_SECURITY_ROOTPLUG)                += commoncap.o root_plug.o
 obj-$(CONFIG_SECURITY_SECLVL)          += seclvl.o
+
+subdir-$(CONFIG_CCSECURITY)+= ccsecurity
+obj-$(CONFIG_CCSECURITY)+= ccsecurity/built-in.o