ccs-patch/patches/ccs-patch-2.6.20.diff

This is TOMOYO Linux patch for kernel 2.6.20.21.

Source code for this patch is http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.20.21.tar.bz2
---
 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                      |    5 +++++
 fs/ioctl.c                      |    3 +++
 fs/namei.c                      |   30 +++++++++++++++++++++++++++++-
 fs/namespace.c                  |    9 +++++++++
 fs/open.c                       |   26 ++++++++++++++++++++++++++
 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                 |   12 ++++++++++++
 kernel/time.c                   |    5 +++++
 kernel/time/ntp.c               |    3 +++
 net/ipv4/inet_connection_sock.c |    3 +++
 net/ipv4/inet_hashtables.c      |    3 +++
 net/ipv4/raw.c                  |   12 +++++++++---
 net/ipv4/udp.c                  |   14 +++++++++++++-
 net/ipv6/inet6_hashtables.c     |    3 +++
 net/ipv6/raw.c                  |   12 +++++++++---
 net/ipv6/udp.c                  |   10 +++++++++-
 net/socket.c                    |   23 ++++++++++++++++++++++-
 net/unix/af_unix.c              |    9 +++++++++
 security/Kconfig                |    2 ++
 security/Makefile               |    3 +++
 42 files changed, 288 insertions(+), 14 deletions(-)

--- linux-2.6.20.21.orig/arch/alpha/kernel/ptrace.c
+++ linux-2.6.20.21/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"
 
@@ -268,6 +269,8 @@ 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-2.6.20.21.orig/arch/ia64/ia32/sys_ia32.c
+++ linux-2.6.20.21/arch/ia64/ia32/sys_ia32.c
@@ -56,6 +56,7 @@
 #include <asm/types.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 #include "ia32priv.h"
 
@@ -1754,6 +1755,8 @@ 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-2.6.20.21.orig/arch/ia64/kernel/ptrace.c
+++ linux-2.6.20.21/arch/ia64/kernel/ptrace.c
@@ -28,6 +28,7 @@
 #ifdef CONFIG_PERFMON
 #include <asm/perfmon.h>
 #endif
+#include <linux/ccsecurity.h>
 
 #include "entry.h"
 
@@ -1417,6 +1418,8 @@ 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-2.6.20.21.orig/arch/m32r/kernel/ptrace.c
+++ linux-2.6.20.21/arch/m32r/kernel/ptrace.c
@@ -32,6 +32,7 @@
 #include <asm/system.h>
 #include <asm/processor.h>
 #include <asm/mmu_context.h>
+#include <linux/ccsecurity.h>
 
 /*
  * This routine will get a word off of the process kernel stack.
@@ -742,6 +743,8 @@ asmlinkage long sys_ptrace(long request,
 {
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        if (request == PTRACE_TRACEME) {
--- linux-2.6.20.21.orig/arch/mips/kernel/ptrace32.c
+++ linux-2.6.20.21/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-2.6.20.21.orig/arch/powerpc/kernel/ptrace32.c
+++ linux-2.6.20.21/arch/powerpc/kernel/ptrace32.c
@@ -32,6 +32,7 @@
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
+#include <linux/ccsecurity.h>
 
 #include "ptrace-common.h"
 
@@ -45,6 +46,8 @@ long compat_sys_ptrace(int request, int 
 {
        struct task_struct *child;
        int ret;
+       if (ccs_ptrace_permission(request, pid))
+               return -EPERM;
 
        lock_kernel();
        if (request == PTRACE_TRACEME) {
--- linux-2.6.20.21.orig/arch/s390/kernel/ptrace.c
+++ linux-2.6.20.21/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_COMPAT
 #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) {
                 ret = ptrace_traceme();
--- linux-2.6.20.21.orig/arch/sparc/kernel/ptrace.c
+++ linux-2.6.20.21/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-2.6.20.21.orig/arch/sparc64/kernel/ptrace.c
+++ linux-2.6.20.21/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
@@ -176,6 +177,10 @@ 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-2.6.20.21.orig/arch/x86_64/ia32/ptrace32.c
+++ linux-2.6.20.21/arch/x86_64/ia32/ptrace32.c
@@ -26,6 +26,7 @@
 #include <asm/i387.h>
 #include <asm/fpu32.h>
 #include <asm/ia32.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Determines which flags the user has access to [1 = access, 0 = no access].
@@ -234,6 +235,8 @@ 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) { 
        case PTRACE_TRACEME:
--- linux-2.6.20.21.orig/fs/compat.c
+++ linux-2.6.20.21/fs/compat.c
@@ -55,6 +55,7 @@
 #include <asm/mmu_context.h>
 #include <asm/ioctls.h>
 #include "internal.h"
+#include <linux/ccsecurity.h>
 
 int compat_log = 1;
 
@@ -397,6 +398,8 @@ 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;
 
@@ -421,6 +424,10 @@ 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)
@@ -1551,7 +1558,7 @@ 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-2.6.20.21.orig/fs/exec.c
+++ linux-2.6.20.21/fs/exec.c
@@ -58,6 +58,8 @@
 #include <linux/kmod.h>
 #endif
 
+#include <linux/ccsecurity.h>
+
 int core_uses_pid;
 char core_pattern[128] = "core";
 int suid_dumpable = 0;
@@ -140,6 +142,10 @@ 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))
@@ -487,6 +493,9 @@ struct file *open_exec(const char *name)
                if (!(nd.mnt->mnt_flags & MNT_NOEXEC) &&
                    S_ISREG(inode->i_mode)) {
                        int err = vfs_permission(&nd, MAY_EXEC);
+                       if (!err)
+                               err = ccs_open_exec_permission(nd.dentry,
+                                                                    nd.mnt);
                        file = ERR_PTR(err);
                        if (!err) {
                                file = nameidata_to_filp(&nd, O_RDONLY);
@@ -1190,7 +1199,8 @@ 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-2.6.20.21.orig/fs/fcntl.c
+++ linux-2.6.20.21/fs/fcntl.c
@@ -22,6 +22,7 @@
 #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)
 {
@@ -392,6 +393,8 @@ asmlinkage long sys_fcntl(unsigned int f
                goto out;
 
        err = security_file_fcntl(filp, cmd, arg);
+       if (!err)
+               err = ccs_fcntl_permission(filp, cmd, arg);
        if (err) {
                fput(filp);
                return err;
@@ -416,6 +419,8 @@ asmlinkage long sys_fcntl64(unsigned int
                goto out;
 
        err = security_file_fcntl(filp, cmd, arg);
+       if (!err)
+               err = ccs_fcntl_permission(filp, cmd, arg);
        if (err) {
                fput(filp);
                return err;
--- linux-2.6.20.21.orig/fs/ioctl.c
+++ linux-2.6.20.21/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)
@@ -167,6 +168,8 @@ 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-2.6.20.21.orig/fs/namei.c
+++ linux-2.6.20.21/fs/namei.c
@@ -37,6 +37,8 @@
 
 #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
@@ -1561,6 +1563,11 @@ 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.
         */
@@ -1600,6 +1607,9 @@ static int open_namei_create(struct name
 
        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);
        mutex_unlock(&dir->d_inode->i_mutex);
        dput(nd->dentry);
@@ -1883,6 +1893,9 @@ asmlinkage long sys_mknodat(int dfd, con
        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);
@@ -1959,6 +1972,8 @@ asmlinkage long sys_mkdirat(int dfd, con
 
        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);
 out_unlock:
@@ -2066,6 +2081,8 @@ static long do_rmdir(int dfd, const char
        error = PTR_ERR(dentry);
        if (IS_ERR(dentry))
                goto exit2;
+       error = ccs_rmdir_permission(nd.dentry->d_inode, dentry, nd.mnt);
+       if (!error)
        error = vfs_rmdir(nd.dentry->d_inode, dentry);
        dput(dentry);
 exit2:
@@ -2146,6 +2163,9 @@ static long do_unlinkat(int dfd, const c
                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);
@@ -2227,6 +2247,9 @@ asmlinkage long sys_symlinkat(const char
        if (IS_ERR(dentry))
                goto out_unlock;
 
+       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);
 out_unlock:
@@ -2322,6 +2345,9 @@ asmlinkage long sys_linkat(int olddfd, c
        error = PTR_ERR(new_dentry);
        if (IS_ERR(new_dentry))
                goto out_unlock;
+       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);
 out_unlock:
@@ -2547,7 +2573,9 @@ static int do_rename(int olddfd, const c
        error = -ENOTEMPTY;
        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-2.6.20.21.orig/fs/namespace.c
+++ linux-2.6.20.21/fs/namespace.c
@@ -28,6 +28,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include "pnode.h"
+#include <linux/ccsecurity.h>
 
 /* spinlock for vfsmount related operations, inplace of dcache_lock */
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
@@ -543,6 +544,8 @@ 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;
 
@@ -1377,6 +1380,7 @@ 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;
@@ -1418,6 +1422,9 @@ 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;
 
@@ -1703,6 +1710,8 @@ 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-2.6.20.21.orig/fs/open.c
+++ linux-2.6.20.21/fs/open.c
@@ -27,6 +27,7 @@
 #include <linux/syscalls.h>
 #include <linux/rcupdate.h>
 #include <linux/audit.h>
+#include <linux/ccsecurity.h>
 
 int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
@@ -264,6 +265,8 @@ static long do_sys_truncate(const char _
        if (error)
                goto dput_and_out;
 
+       error = ccs_truncate_permission(nd.dentry, nd.mnt);
+       if (!error)
        error = locks_verify_truncate(inode, NULL, length);
        if (!error) {
                DQUOT_INIT(inode);
@@ -317,6 +320,9 @@ static long do_sys_ftruncate(unsigned in
        if (IS_APPEND(inode))
                goto out_putf;
 
+       error = ccs_truncate_permission(dentry, file->f_vfsmnt);
+       if (error)
+               goto out_putf;
        error = locks_verify_truncate(inode, file, length);
        if (!error)
                error = do_truncate(dentry, length, ATTR_MTIME|ATTR_CTIME, file);
@@ -481,6 +487,8 @@ 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();
@@ -514,6 +522,9 @@ 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;
        mutex_lock(&inode->i_mutex);
        if (mode == (mode_t) -1)
                mode = inode->i_mode;
@@ -548,6 +559,9 @@ asmlinkage long sys_fchmodat(int dfd, co
        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;
 
        mutex_lock(&inode->i_mutex);
        if (mode == (mode_t) -1)
@@ -611,6 +625,8 @@ asmlinkage long sys_chown(const char __u
        error = user_path_walk(filename, &nd);
        if (error)
                goto out;
+       error = ccs_chown_permission(nd.dentry, nd.mnt, user, group);
+       if (!error)
        error = chown_common(nd.dentry, user, group);
        path_release(&nd);
 out:
@@ -631,6 +647,8 @@ asmlinkage long sys_fchownat(int dfd, co
        error = __user_walk_fd(dfd, filename, follow, &nd);
        if (error)
                goto out;
+       error = ccs_chown_permission(nd.dentry, nd.mnt, user, group);
+       if (!error)
        error = chown_common(nd.dentry, user, group);
        path_release(&nd);
 out:
@@ -645,6 +663,8 @@ asmlinkage long sys_lchown(const char __
        error = user_path_walk_link(filename, &nd);
        if (error)
                goto out;
+       error = ccs_chown_permission(nd.dentry, nd.mnt, user, group);
+       if (!error)
        error = chown_common(nd.dentry, user, group);
        path_release(&nd);
 out:
@@ -664,6 +684,8 @@ asmlinkage long sys_fchown(unsigned int 
 
        dentry = file->f_path.dentry;
        audit_inode(NULL, dentry->d_inode);
+       error = ccs_chown_permission(dentry, file->f_vfsmnt, user, group);
+       if (!error)
        error = chown_common(dentry, user, group);
        fput(file);
 out:
@@ -756,7 +778,9 @@ static struct file *do_filp_open(int dfd
        if ((namei_flags+1) & O_ACCMODE)
                namei_flags++;
 
+       ccs_save_open_mode(flags);
        error = open_namei(dfd, filename, namei_flags, mode, &nd);
+       ccs_clear_open_mode();
        if (!error)
                return nameidata_to_filp(&nd, flags);
 
@@ -1085,6 +1109,8 @@ EXPORT_SYMBOL(sys_close);
  */
 asmlinkage long sys_vhangup(void)
 {
+       if (!ccs_capable(CCS_SYS_VHANGUP))
+               return -EPERM;
        if (capable(CAP_SYS_TTY_CONFIG)) {
                /* XXX: this needs locking */
                tty_vhangup(current->signal->tty);
--- linux-2.6.20.21.orig/fs/proc/proc_misc.c
+++ linux-2.6.20.21/fs/proc/proc_misc.c
@@ -747,4 +747,5 @@ void __init proc_misc_init(void)
        if (entry)
                entry->proc_fops = &proc_sysrq_trigger_operations;
 #endif
+       printk(KERN_INFO "Hook version: 2.6.20.21 2010/08/23\n");
 }
--- linux-2.6.20.21.orig/include/linux/init_task.h
+++ linux-2.6.20.21/include/linux/init_task.h
@@ -88,6 +88,14 @@ extern struct nsproxy init_nsproxy;
 
 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)
@@ -141,6 +149,7 @@ extern struct group_info init_groups;
        .pi_lock        = SPIN_LOCK_UNLOCKED,                           \
        INIT_TRACE_IRQFLAGS                                             \
        INIT_LOCKDEP                                                    \
+       INIT_CCSECURITY                                                 \
 }
 
 
--- linux-2.6.20.21.orig/include/linux/sched.h
+++ linux-2.6.20.21/include/linux/sched.h
@@ -37,6 +37,8 @@
 
 #ifdef __KERNEL__
 
+struct ccs_domain_info;
+
 struct sched_param {
        int sched_priority;
 };
@@ -1051,6 +1053,10 @@ struct task_struct {
 #ifdef CONFIG_FAULT_INJECTION
        int make_it_fail;
 #endif
+#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-2.6.20.21.orig/kernel/compat.c
+++ linux-2.6.20.21/kernel/compat.c
@@ -25,6 +25,7 @@
 #include <linux/posix-timers.h>
 
 #include <asm/uaccess.h>
+#include <linux/ccsecurity.h>
 
 int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
 {
@@ -869,6 +870,8 @@ 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-2.6.20.21.orig/kernel/kexec.c
+++ linux-2.6.20.21/kernel/kexec.c
@@ -28,6 +28,7 @@
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/semaphore.h>
+#include <linux/ccsecurity.h>
 
 /* Per cpu memory for storing cpu states in case of system crash. */
 note_buf_t* crash_notes;
@@ -924,6 +925,8 @@ 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-2.6.20.21.orig/kernel/kmod.c
+++ linux-2.6.20.21/kernel/kmod.c
@@ -166,6 +166,11 @@ 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 = kernel_execve(sub_info->path,
--- linux-2.6.20.21.orig/kernel/module.c
+++ linux-2.6.20.21/kernel/module.c
@@ -44,6 +44,7 @@
 #include <asm/semaphore.h>
 #include <asm/cacheflush.h>
 #include <linux/license.h>
+#include <linux/ccsecurity.h>
 
 #if 0
 #define DEBUGP printk
@@ -658,7 +659,8 @@ 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';
@@ -1964,7 +1966,8 @@ 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 (mutex_lock_interruptible(&module_mutex) != 0)
                return -EINTR;
--- linux-2.6.20.21.orig/kernel/ptrace.c
+++ linux-2.6.20.21/kernel/ptrace.c
@@ -21,6 +21,7 @@
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
+#include <linux/ccsecurity.h>
 
 /*
  * ptrace a task: make the debugger its new parent and
@@ -456,6 +457,8 @@ 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();
        if (request == PTRACE_TRACEME) {
                ret = ptrace_traceme();
--- linux-2.6.20.21.orig/kernel/sched.c
+++ linux-2.6.20.21/kernel/sched.c
@@ -55,6 +55,7 @@
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Convert user-nice values [ -20 ... 0 ... 19 ]
@@ -4098,6 +4099,8 @@ int can_nice(const struct task_struct *p
 asmlinkage long sys_nice(int increment)
 {
        long nice, retval;
+       if (!ccs_capable(CCS_SYS_NICE))
+               return -EPERM;
 
        /*
         * Setpriority might change our priority at the same moment.
--- linux-2.6.20.21.orig/kernel/signal.c
+++ linux-2.6.20.21/kernel/signal.c
@@ -32,6 +32,7 @@
 #include <asm/unistd.h>
 #include <asm/siginfo.h>
 #include "audit.h"     /* audit_signal_info() */
+#include <linux/ccsecurity.h>
 
 /*
  * SLAB caches for signal bits.
@@ -2233,6 +2234,8 @@ 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;
@@ -2291,6 +2294,8 @@ 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);
 }
@@ -2304,6 +2309,8 @@ 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);
 }
@@ -2321,6 +2328,8 @@ 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-2.6.20.21.orig/kernel/sys.c
+++ linux-2.6.20.21/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)
@@ -599,6 +600,10 @@ 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;
@@ -822,6 +827,8 @@ 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;
 
        /* Instead of trying to make the power_off code look like
         * halt when pm_power_off is not set do it the easy way.
@@ -1798,6 +1805,8 @@ 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)) {
@@ -1843,6 +1852,8 @@ 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-2.6.20.21.orig/kernel/sysctl.c
+++ linux-2.6.20.21/kernel/sysctl.c
@@ -48,6 +48,7 @@
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
+#include <linux/ccsecurity.h>
 
 extern int proc_nr_files(ctl_table *table, int write, struct file *filp,
                      void __user *buffer, size_t *lenp, loff_t *ppos);
@@ -1224,6 +1225,7 @@ void __init sysctl_init(void)
 }
 
 #ifdef CONFIG_SYSCTL_SYSCALL
+
 int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
               void __user *newval, size_t newlen)
 {
@@ -1248,6 +1250,9 @@ 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);
 
@@ -1322,6 +1327,13 @@ 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-2.6.20.21.orig/kernel/time.c
+++ linux-2.6.20.21/kernel/time.c
@@ -39,6 +39,7 @@
 
 #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
@@ -91,6 +92,8 @@ 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;
@@ -161,6 +164,8 @@ 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. */
--- linux-2.6.20.21.orig/kernel/time/ntp.c
+++ linux-2.6.20.21/kernel/time/ntp.c
@@ -14,6 +14,7 @@
 
 #include <asm/div64.h>
 #include <asm/timex.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Timekeeping variables
@@ -199,6 +200,8 @@ 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-2.6.20.21.orig/net/ipv4/inet_connection_sock.c
+++ linux-2.6.20.21/net/ipv4/inet_connection_sock.c
@@ -23,6 +23,7 @@
 #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";
@@ -85,6 +86,8 @@ 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-2.6.20.21.orig/net/ipv4/inet_hashtables.c
+++ linux-2.6.20.21/net/ipv4/inet_hashtables.c
@@ -22,6 +22,7 @@
 #include <net/inet_connection_sock.h>
 #include <net/inet_hashtables.h>
 #include <net/ip.h>
+#include <linux/ccsecurity.h>
 
 /*
  * Allocate and initialize a new local port bind bucket.
@@ -292,6 +293,8 @@ int inet_hash_connect(struct inet_timewa
                local_bh_disable();
                for (i = 1; i <= range; i++) {
                        port = low + (i + offset) % range;
+                       if (ccs_lport_reserved(port))
+                               continue;
                        head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
                        spin_lock(&head->lock);
 
--- linux-2.6.20.21.orig/net/ipv4/raw.c
+++ linux-2.6.20.21/net/ipv4/raw.c
@@ -78,6 +78,7 @@
 #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);
@@ -594,9 +595,14 @@ 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-2.6.20.21.orig/net/ipv4/udp.c
+++ linux-2.6.20.21/net/ipv4/udp.c
@@ -102,6 +102,7 @@
 #include <net/checksum.h>
 #include <net/xfrm.h>
 #include "udp_impl.h"
+#include <linux/ccsecurity.h>
 
 /*
  *     Snmp MIB for the UDP layer
@@ -162,6 +163,8 @@ int __udp_lib_get_port(struct sock *sk, 
                                        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;
@@ -180,6 +183,8 @@ int __udp_lib_get_port(struct sock *sk, 
                                result = sysctl_local_port_range[0]
                                        + ((result - sysctl_local_port_range[0]) &
                                           (UDP_HTABLE_SIZE - 1));
+                       if (ccs_lport_reserved(result))
+                               continue;
                        if (! __udp_lib_lport_inuse(result, udptable))
                                break;
                }
@@ -810,6 +815,7 @@ int udp_recvmsg(struct kiocb *iocb, stru
        struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name;
        struct sk_buff *skb;
        int copied, err, copy_only, is_udplite = IS_UDPLITE(sk);
+       _Bool update_stat;
 
        /*
         *      Check any passed addresses
@@ -824,6 +830,11 @@ 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) {
@@ -882,7 +893,8 @@ out:
        return err;
 
 csum_copy_err:
-       UDP_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
+       if (update_stat)
+               UDP_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
 
        skb_kill_datagram(sk, skb, flags);
 
--- linux-2.6.20.21.orig/net/ipv6/inet6_hashtables.c
+++ linux-2.6.20.21/net/ipv6/inet6_hashtables.c
@@ -21,6 +21,7 @@
 #include <net/inet_hashtables.h>
 #include <net/inet6_hashtables.h>
 #include <net/ip.h>
+#include <linux/ccsecurity.h>
 
 void __inet6_hash(struct inet_hashinfo *hashinfo,
                                struct sock *sk)
@@ -266,6 +267,8 @@ int inet6_hash_connect(struct inet_timew
                local_bh_disable();
                for (i = 1; i <= range; i++) {
                        port = low + (i + offset) % range;
+                       if (ccs_lport_reserved(port))
+                               continue;
                        head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
                        spin_lock(&head->lock);
 
--- linux-2.6.20.21.orig/net/ipv6/raw.c
+++ linux-2.6.20.21/net/ipv6/raw.c
@@ -59,6 +59,7 @@
 
 #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);
@@ -411,9 +412,14 @@ 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-2.6.20.21.orig/net/ipv6/udp.c
+++ linux-2.6.20.21/net/ipv6/udp.c
@@ -50,6 +50,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include "udp_impl.h"
+#include <linux/ccsecurity.h>
 
 DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
 
@@ -123,6 +124,7 @@ int udpv6_recvmsg(struct kiocb *iocb, st
        struct sk_buff *skb;
        size_t copied;
        int err, copy_only, is_udplite = IS_UDPLITE(sk);
+       _Bool update_stat;
 
        if (addr_len)
                *addr_len=sizeof(struct sockaddr_in6);
@@ -134,6 +136,11 @@ 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) {
@@ -206,7 +213,8 @@ csum_copy_err:
        skb_kill_datagram(sk, skb, flags);
 
        if (flags & MSG_DONTWAIT) {
-               UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
+               if (update_stat)
+                       UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
                return -EAGAIN;
        }
        goto try_again;
--- linux-2.6.20.21.orig/net/socket.c
+++ linux-2.6.20.21/net/socket.c
@@ -93,6 +93,8 @@
 #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, const struct iovec *iov,
                         unsigned long nr_segs, loff_t pos);
@@ -560,9 +562,10 @@ 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);
 }
 
@@ -1084,6 +1087,8 @@ 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;
 
@@ -1286,6 +1291,11 @@ asmlinkage long sys_bind(int fd, struct 
                                                   (struct sockaddr *)address,
                                                   addrlen);
                        if (!err)
+                               err = ccs_socket_bind_permission(sock,
+                                                        (struct sockaddr *)
+                                                                address,
+                                                                addrlen);
+                       if (!err)
                                err = sock->ops->bind(sock,
                                                      (struct sockaddr *)
                                                      address, addrlen);
@@ -1315,6 +1325,8 @@ asmlinkage long sys_listen(int fd, int b
 
                err = security_socket_listen(sock, backlog);
                if (!err)
+                       err = ccs_socket_listen_permission(sock);
+               if (!err)
                        err = sock->ops->listen(sock, backlog);
 
                fput_light(sock->file, fput_needed);
@@ -1346,6 +1358,7 @@ asmlinkage long sys_accept(int fd, struc
        if (!sock)
                goto out;
 
+retry:
        err = -ENFILE;
        if (!(newsock = sock_alloc()))
                goto out_put;
@@ -1378,6 +1391,11 @@ asmlinkage long sys_accept(int fd, struc
        if (err < 0)
                goto out_fd;
 
+       if (ccs_socket_post_accept_permission(sock, newsock)) {
+               fput(newfile);
+               put_unused_fd(newfd);
+               goto retry;
+       }
        if (upeer_sockaddr) {
                if (newsock->ops->getname(newsock, (struct sockaddr *)address,
                                          &len, 2) < 0) {
@@ -1440,6 +1458,9 @@ asmlinkage long sys_connect(int fd, stru
 
        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;
 
--- linux-2.6.20.21.orig/net/unix/af_unix.c
+++ linux-2.6.20.21/net/unix/af_unix.c
@@ -116,6 +116,7 @@
 #include <linux/mount.h>
 #include <net/checksum.h>
 #include <linux/security.h>
+#include <linux/ccsecurity.h>
 
 int sysctl_unix_max_dgram_qlen __read_mostly = 10;
 
@@ -808,6 +809,9 @@ 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;
@@ -1608,12 +1612,17 @@ static int unix_dgram_recvmsg(struct kio
 
        mutex_lock(&u->readlock);
 
+retry:
        skb = skb_recv_datagram(sk, flags, noblock, &err);
        if (!skb)
                goto out_unlock;
 
        wake_up_interruptible(&u->peer_wait);
 
+       if (ccs_socket_post_recvmsg_permission(sk, skb)) {
+               skb_kill_datagram(sk, skb, flags);
+               goto retry;
+       }
        if (msg->msg_name)
                unix_copy_addr(msg, skb->sk);
 
--- linux-2.6.20.21.orig/security/Kconfig
+++ linux-2.6.20.21/security/Kconfig
@@ -95,5 +95,7 @@ config SECURITY_ROOTPLUG
 
 source security/selinux/Kconfig
 
+source security/ccsecurity/Kconfig
+
 endmenu
 
--- linux-2.6.20.21.orig/security/Makefile
+++ linux-2.6.20.21/security/Makefile
@@ -16,3 +16,6 @@ obj-$(CONFIG_SECURITY)                        += security.o d
 obj-$(CONFIG_SECURITY_SELINUX)         += selinux/built-in.o
 obj-$(CONFIG_SECURITY_CAPABILITIES)    += commoncap.o capability.o
 obj-$(CONFIG_SECURITY_ROOTPLUG)                += commoncap.o root_plug.o
+
+subdir-$(CONFIG_CCSECURITY)+= ccsecurity
+obj-$(CONFIG_CCSECURITY)+= ccsecurity/built-in.o