| 1 |
This is TOMOYO Linux patch for CAT-760. |
| 2 |
|
| 3 |
Source code for this patch is linux-2.6.15-cat_20080502.tgz |
| 4 |
--- |
| 5 |
arch/alpha/kernel/ptrace.c | 3 +++ |
| 6 |
arch/ia64/ia32/sys_ia32.c | 3 +++ |
| 7 |
arch/ia64/kernel/ptrace.c | 3 +++ |
| 8 |
arch/m32r/kernel/ptrace.c | 3 +++ |
| 9 |
arch/mips/kernel/ptrace32.c | 3 +++ |
| 10 |
arch/powerpc/kernel/ptrace32.c | 3 +++ |
| 11 |
arch/s390/kernel/ptrace.c | 3 +++ |
| 12 |
arch/sparc/kernel/ptrace.c | 5 +++++ |
| 13 |
arch/sparc64/kernel/ptrace.c | 5 +++++ |
| 14 |
arch/x86_64/ia32/ptrace32.c | 3 +++ |
| 15 |
fs/compat.c | 9 ++++++++- |
| 16 |
fs/exec.c | 12 +++++++++++- |
| 17 |
fs/fcntl.c | 4 ++++ |
| 18 |
fs/ioctl.c | 5 +++++ |
| 19 |
fs/namei.c | 32 ++++++++++++++++++++++++++++++++ |
| 20 |
fs/namespace.c | 23 ++++++++++++++++++++++- |
| 21 |
fs/open.c | 27 ++++++++++++++++++++++++++- |
| 22 |
fs/proc/proc_misc.c | 1 + |
| 23 |
include/linux/init_task.h | 9 +++++++++ |
| 24 |
include/linux/sched.h | 6 ++++++ |
| 25 |
kernel/compat.c | 3 +++ |
| 26 |
kernel/kexec.c | 3 +++ |
| 27 |
kernel/kmod.c | 5 +++++ |
| 28 |
kernel/module.c | 7 +++++-- |
| 29 |
kernel/ptrace.c | 3 +++ |
| 30 |
kernel/sched.c | 3 +++ |
| 31 |
kernel/signal.c | 9 +++++++++ |
| 32 |
kernel/sys.c | 11 +++++++++++ |
| 33 |
kernel/sysctl.c | 11 +++++++++++ |
| 34 |
kernel/time.c | 7 +++++++ |
| 35 |
net/ipv4/inet_connection_sock.c | 3 +++ |
| 36 |
net/ipv4/raw.c | 4 ++++ |
| 37 |
net/ipv4/tcp_ipv4.c | 3 +++ |
| 38 |
net/ipv4/udp.c | 8 ++++++++ |
| 39 |
net/ipv6/raw.c | 4 ++++ |
| 40 |
net/ipv6/tcp_ipv6.c | 5 +++++ |
| 41 |
net/ipv6/udp.c | 8 ++++++++ |
| 42 |
net/socket.c | 23 ++++++++++++++++++++--- |
| 43 |
net/unix/af_unix.c | 4 ++++ |
| 44 |
security/Kconfig | 2 ++ |
| 45 |
security/Makefile | 3 +++ |
| 46 |
41 files changed, 282 insertions(+), 9 deletions(-) |
| 47 |
|
| 48 |
--- linux-2.6.15-cat.orig/arch/alpha/kernel/ptrace.c |
| 49 |
+++ linux-2.6.15-cat/arch/alpha/kernel/ptrace.c |
| 50 |
@@ -20,6 +20,7 @@ |
| 51 |
#include <asm/pgtable.h> |
| 52 |
#include <asm/system.h> |
| 53 |
#include <asm/fpu.h> |
| 54 |
+#include <linux/ccsecurity.h> |
| 55 |
|
| 56 |
#include "proto.h" |
| 57 |
|
| 58 |
@@ -261,6 +262,8 @@ do_sys_ptrace(long request, long pid, lo |
| 59 |
unsigned long tmp; |
| 60 |
size_t copied; |
| 61 |
long ret; |
| 62 |
+ if (ccs_ptrace_permission(request, pid)) |
| 63 |
+ return -EPERM; |
| 64 |
|
| 65 |
lock_kernel(); |
| 66 |
DBG(DBG_MEM, ("request=%ld pid=%ld addr=0x%lx data=0x%lx\n", |
| 67 |
--- linux-2.6.15-cat.orig/arch/ia64/ia32/sys_ia32.c |
| 68 |
+++ linux-2.6.15-cat/arch/ia64/ia32/sys_ia32.c |
| 69 |
@@ -57,6 +57,7 @@ |
| 70 |
#include <asm/types.h> |
| 71 |
#include <asm/uaccess.h> |
| 72 |
#include <asm/unistd.h> |
| 73 |
+#include <linux/ccsecurity.h> |
| 74 |
|
| 75 |
#include "ia32priv.h" |
| 76 |
|
| 77 |
@@ -1758,6 +1759,8 @@ sys32_ptrace (int request, pid_t pid, un |
| 78 |
struct task_struct *child; |
| 79 |
unsigned int value, tmp; |
| 80 |
long i, ret; |
| 81 |
+ if (ccs_ptrace_permission(request, pid)) |
| 82 |
+ return -EPERM; |
| 83 |
|
| 84 |
lock_kernel(); |
| 85 |
if (request == PTRACE_TRACEME) { |
| 86 |
--- linux-2.6.15-cat.orig/arch/ia64/kernel/ptrace.c |
| 87 |
+++ linux-2.6.15-cat/arch/ia64/kernel/ptrace.c |
| 88 |
@@ -29,6 +29,7 @@ |
| 89 |
#ifdef CONFIG_PERFMON |
| 90 |
#include <asm/perfmon.h> |
| 91 |
#endif |
| 92 |
+#include <linux/ccsecurity.h> |
| 93 |
|
| 94 |
#include "entry.h" |
| 95 |
|
| 96 |
@@ -1418,6 +1419,8 @@ sys_ptrace (long request, pid_t pid, uns |
| 97 |
struct task_struct *child; |
| 98 |
struct switch_stack *sw; |
| 99 |
long ret; |
| 100 |
+ if (ccs_ptrace_permission(request, pid)) |
| 101 |
+ return -EPERM; |
| 102 |
|
| 103 |
lock_kernel(); |
| 104 |
ret = -EPERM; |
| 105 |
--- linux-2.6.15-cat.orig/arch/m32r/kernel/ptrace.c |
| 106 |
+++ linux-2.6.15-cat/arch/m32r/kernel/ptrace.c |
| 107 |
@@ -33,6 +33,7 @@ |
| 108 |
#include <asm/system.h> |
| 109 |
#include <asm/processor.h> |
| 110 |
#include <asm/mmu_context.h> |
| 111 |
+#include <linux/ccsecurity.h> |
| 112 |
|
| 113 |
/* |
| 114 |
* Get the address of the live pt_regs for the specified task. |
| 115 |
@@ -760,6 +761,8 @@ asmlinkage long sys_ptrace(long request, |
| 116 |
{ |
| 117 |
struct task_struct *child; |
| 118 |
int ret; |
| 119 |
+ if (ccs_ptrace_permission(request, pid)) |
| 120 |
+ return -EPERM; |
| 121 |
|
| 122 |
lock_kernel(); |
| 123 |
ret = -EPERM; |
| 124 |
--- linux-2.6.15-cat.orig/arch/mips/kernel/ptrace32.c |
| 125 |
+++ linux-2.6.15-cat/arch/mips/kernel/ptrace32.c |
| 126 |
@@ -35,6 +35,7 @@ |
| 127 |
#include <asm/system.h> |
| 128 |
#include <asm/uaccess.h> |
| 129 |
#include <asm/bootinfo.h> |
| 130 |
+#include <linux/ccsecurity.h> |
| 131 |
|
| 132 |
int ptrace_getregs (struct task_struct *child, __s64 __user *data); |
| 133 |
int ptrace_setregs (struct task_struct *child, __s64 __user *data); |
| 134 |
@@ -50,6 +51,8 @@ asmlinkage int sys32_ptrace(int request, |
| 135 |
{ |
| 136 |
struct task_struct *child; |
| 137 |
int ret; |
| 138 |
+ if (ccs_ptrace_permission(request, pid)) |
| 139 |
+ return -EPERM; |
| 140 |
|
| 141 |
#if 0 |
| 142 |
printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n", |
| 143 |
--- linux-2.6.15-cat.orig/arch/powerpc/kernel/ptrace32.c |
| 144 |
+++ linux-2.6.15-cat/arch/powerpc/kernel/ptrace32.c |
| 145 |
@@ -33,6 +33,7 @@ |
| 146 |
#include <asm/page.h> |
| 147 |
#include <asm/pgtable.h> |
| 148 |
#include <asm/system.h> |
| 149 |
+#include <linux/ccsecurity.h> |
| 150 |
|
| 151 |
#include "ptrace-common.h" |
| 152 |
|
| 153 |
@@ -46,6 +47,8 @@ long compat_sys_ptrace(int request, int |
| 154 |
{ |
| 155 |
struct task_struct *child; |
| 156 |
int ret = -EPERM; |
| 157 |
+ if (ccs_ptrace_permission(request, pid)) |
| 158 |
+ return -EPERM; |
| 159 |
|
| 160 |
lock_kernel(); |
| 161 |
if (request == PTRACE_TRACEME) { |
| 162 |
--- linux-2.6.15-cat.orig/arch/s390/kernel/ptrace.c |
| 163 |
+++ linux-2.6.15-cat/arch/s390/kernel/ptrace.c |
| 164 |
@@ -41,6 +41,7 @@ |
| 165 |
#include <asm/system.h> |
| 166 |
#include <asm/uaccess.h> |
| 167 |
#include <asm/unistd.h> |
| 168 |
+#include <linux/ccsecurity.h> |
| 169 |
|
| 170 |
#ifdef CONFIG_S390_SUPPORT |
| 171 |
#include "compat_ptrace.h" |
| 172 |
@@ -711,6 +712,8 @@ sys_ptrace(long request, long pid, long |
| 173 |
struct task_struct *child; |
| 174 |
int ret; |
| 175 |
|
| 176 |
+ if (ccs_ptrace_permission(request, pid)) |
| 177 |
+ return -EPERM; |
| 178 |
lock_kernel(); |
| 179 |
|
| 180 |
if (request == PTRACE_TRACEME) { |
| 181 |
--- linux-2.6.15-cat.orig/arch/sparc/kernel/ptrace.c |
| 182 |
+++ linux-2.6.15-cat/arch/sparc/kernel/ptrace.c |
| 183 |
@@ -23,6 +23,7 @@ |
| 184 |
#include <asm/pgtable.h> |
| 185 |
#include <asm/system.h> |
| 186 |
#include <asm/uaccess.h> |
| 187 |
+#include <linux/ccsecurity.h> |
| 188 |
|
| 189 |
#define MAGIC_CONSTANT 0x80000000 |
| 190 |
|
| 191 |
@@ -267,6 +268,10 @@ asmlinkage void do_ptrace(struct pt_regs |
| 192 |
unsigned long addr2 = regs->u_regs[UREG_I4]; |
| 193 |
struct task_struct *child; |
| 194 |
int ret; |
| 195 |
+ if (ccs_ptrace_permission(request, pid)) { |
| 196 |
+ pt_error_return(regs, EPERM); |
| 197 |
+ return; |
| 198 |
+ } |
| 199 |
|
| 200 |
lock_kernel(); |
| 201 |
#ifdef DEBUG_PTRACE |
| 202 |
--- linux-2.6.15-cat.orig/arch/sparc64/kernel/ptrace.c |
| 203 |
+++ linux-2.6.15-cat/arch/sparc64/kernel/ptrace.c |
| 204 |
@@ -32,6 +32,7 @@ |
| 205 |
#include <asm/spitfire.h> |
| 206 |
#include <asm/page.h> |
| 207 |
#include <asm/cpudata.h> |
| 208 |
+#include <linux/ccsecurity.h> |
| 209 |
|
| 210 |
/* Returning from ptrace is a bit tricky because the syscall return |
| 211 |
* low level code assumes any value returned which is negative and |
| 212 |
@@ -173,6 +174,10 @@ asmlinkage void do_ptrace(struct pt_regs |
| 213 |
unsigned long addr2 = regs->u_regs[UREG_I4]; |
| 214 |
struct task_struct *child; |
| 215 |
int ret; |
| 216 |
+ if (ccs_ptrace_permission(request, pid)) { |
| 217 |
+ pt_error_return(regs, EPERM); |
| 218 |
+ return; |
| 219 |
+ } |
| 220 |
|
| 221 |
if (test_thread_flag(TIF_32BIT)) { |
| 222 |
addr &= 0xffffffffUL; |
| 223 |
--- linux-2.6.15-cat.orig/arch/x86_64/ia32/ptrace32.c |
| 224 |
+++ linux-2.6.15-cat/arch/x86_64/ia32/ptrace32.c |
| 225 |
@@ -27,6 +27,7 @@ |
| 226 |
#include <asm/debugreg.h> |
| 227 |
#include <asm/i387.h> |
| 228 |
#include <asm/fpu32.h> |
| 229 |
+#include <linux/ccsecurity.h> |
| 230 |
|
| 231 |
/* determines which flags the user has access to. */ |
| 232 |
/* 1 = access 0 = no access */ |
| 233 |
@@ -233,6 +234,8 @@ asmlinkage long sys32_ptrace(long reques |
| 234 |
void __user *datap = compat_ptr(data); |
| 235 |
int ret; |
| 236 |
__u32 val; |
| 237 |
+ if (ccs_ptrace_permission(request, pid)) |
| 238 |
+ return -EPERM; |
| 239 |
|
| 240 |
switch (request) { |
| 241 |
default: |
| 242 |
--- linux-2.6.15-cat.orig/fs/compat.c |
| 243 |
+++ linux-2.6.15-cat/fs/compat.c |
| 244 |
@@ -52,6 +52,7 @@ |
| 245 |
#include <asm/uaccess.h> |
| 246 |
#include <asm/mmu_context.h> |
| 247 |
#include <asm/ioctls.h> |
| 248 |
+#include <linux/ccsecurity.h> |
| 249 |
|
| 250 |
/* |
| 251 |
* Not all architectures have sys_utime, so implement this in terms |
| 252 |
@@ -353,6 +354,8 @@ asmlinkage long compat_sys_ioctl(unsigne |
| 253 |
|
| 254 |
/* RED-PEN how should LSM module know it's handling 32bit? */ |
| 255 |
error = security_file_ioctl(filp, cmd, arg); |
| 256 |
+ if (!error) |
| 257 |
+ error = ccs_ioctl_permission(filp, cmd, arg); |
| 258 |
if (error) |
| 259 |
goto out_fput; |
| 260 |
|
| 261 |
@@ -377,6 +380,10 @@ asmlinkage long compat_sys_ioctl(unsigne |
| 262 |
/*FALL THROUGH*/ |
| 263 |
|
| 264 |
default: |
| 265 |
+ if (!ccs_capable(CCS_SYS_IOCTL)) { |
| 266 |
+ error = -EPERM; |
| 267 |
+ goto out_fput; |
| 268 |
+ } |
| 269 |
if (filp->f_op && filp->f_op->compat_ioctl) { |
| 270 |
error = filp->f_op->compat_ioctl(filp, cmd, arg); |
| 271 |
if (error != -ENOIOCTLCMD) |
| 272 |
@@ -1476,7 +1483,7 @@ int compat_do_execve(char * filename, |
| 273 |
if (retval < 0) |
| 274 |
goto out; |
| 275 |
|
| 276 |
- retval = search_binary_handler(bprm, regs); |
| 277 |
+ retval = ccs_search_binary_handler(bprm, regs); |
| 278 |
if (retval >= 0) { |
| 279 |
free_arg_pages(bprm); |
| 280 |
|
| 281 |
--- linux-2.6.15-cat.orig/fs/exec.c |
| 282 |
+++ linux-2.6.15-cat/fs/exec.c |
| 283 |
@@ -57,6 +57,8 @@ |
| 284 |
#include <linux/kmod.h> |
| 285 |
#endif |
| 286 |
|
| 287 |
+#include <linux/ccsecurity.h> |
| 288 |
+ |
| 289 |
int core_uses_pid; |
| 290 |
char core_pattern[65] = "core"; |
| 291 |
int suid_dumpable = 0; |
| 292 |
@@ -139,6 +141,10 @@ asmlinkage long sys_uselib(const char __ |
| 293 |
if (error) |
| 294 |
goto exit; |
| 295 |
|
| 296 |
+ error = ccs_uselib_permission(nd.dentry, nd.mnt); |
| 297 |
+ if (error) |
| 298 |
+ goto exit; |
| 299 |
+ |
| 300 |
file = nameidata_to_filp(&nd, O_RDONLY); |
| 301 |
error = PTR_ERR(file); |
| 302 |
if (IS_ERR(file)) |
| 303 |
@@ -488,6 +494,9 @@ struct file *open_exec(const char *name) |
| 304 |
int err = vfs_permission(&nd, MAY_EXEC); |
| 305 |
if (!err && !(inode->i_mode & 0111)) |
| 306 |
err = -EACCES; |
| 307 |
+ if (!err) |
| 308 |
+ err = ccs_open_exec_permission(nd.dentry, |
| 309 |
+ nd.mnt); |
| 310 |
file = ERR_PTR(err); |
| 311 |
if (!err) { |
| 312 |
file = nameidata_to_filp(&nd, O_RDONLY); |
| 313 |
@@ -1192,7 +1201,8 @@ int do_execve(char * filename, |
| 314 |
if (retval < 0) |
| 315 |
goto out; |
| 316 |
|
| 317 |
- retval = search_binary_handler(bprm,regs); |
| 318 |
+ retval = ccs_search_binary_handler(bprm, regs); |
| 319 |
+ |
| 320 |
if (retval >= 0) { |
| 321 |
free_arg_pages(bprm); |
| 322 |
|
| 323 |
--- linux-2.6.15-cat.orig/fs/fcntl.c |
| 324 |
+++ linux-2.6.15-cat/fs/fcntl.c |
| 325 |
@@ -21,6 +21,7 @@ |
| 326 |
#include <asm/poll.h> |
| 327 |
#include <asm/siginfo.h> |
| 328 |
#include <asm/uaccess.h> |
| 329 |
+#include <linux/ccsecurity.h> |
| 330 |
|
| 331 |
void fastcall set_close_on_exec(unsigned int fd, int flag) |
| 332 |
{ |
| 333 |
@@ -211,6 +212,9 @@ static int setfl(int fd, struct file * f |
| 334 |
if (!(arg & O_APPEND) && IS_APPEND(inode)) |
| 335 |
return -EPERM; |
| 336 |
|
| 337 |
+ if (!(arg & O_APPEND) && ccs_rewrite_permission(filp)) |
| 338 |
+ return -EPERM; |
| 339 |
+ |
| 340 |
/* O_NOATIME can only be set by the owner or superuser */ |
| 341 |
if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME)) |
| 342 |
if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER)) |
| 343 |
--- linux-2.6.15-cat.orig/fs/ioctl.c |
| 344 |
+++ linux-2.6.15-cat/fs/ioctl.c |
| 345 |
@@ -15,6 +15,7 @@ |
| 346 |
|
| 347 |
#include <asm/uaccess.h> |
| 348 |
#include <asm/ioctls.h> |
| 349 |
+#include <linux/ccsecurity.h> |
| 350 |
|
| 351 |
static long do_ioctl(struct file *filp, unsigned int cmd, |
| 352 |
unsigned long arg) |
| 353 |
@@ -23,6 +24,8 @@ static long do_ioctl(struct file *filp, |
| 354 |
|
| 355 |
if (!filp->f_op) |
| 356 |
goto out; |
| 357 |
+ if (!ccs_capable(CCS_SYS_IOCTL)) |
| 358 |
+ return -EPERM; |
| 359 |
|
| 360 |
if (filp->f_op->unlocked_ioctl) { |
| 361 |
error = filp->f_op->unlocked_ioctl(filp, cmd, arg); |
| 362 |
@@ -167,6 +170,8 @@ asmlinkage long sys_ioctl(unsigned int f |
| 363 |
goto out; |
| 364 |
|
| 365 |
error = security_file_ioctl(filp, cmd, arg); |
| 366 |
+ if (!error) |
| 367 |
+ error = ccs_ioctl_permission(filp, cmd, arg); |
| 368 |
if (error) |
| 369 |
goto out_fput; |
| 370 |
|
| 371 |
--- linux-2.6.15-cat.orig/fs/namei.c |
| 372 |
+++ linux-2.6.15-cat/fs/namei.c |
| 373 |
@@ -34,6 +34,8 @@ |
| 374 |
|
| 375 |
#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE]) |
| 376 |
|
| 377 |
+#include <linux/ccsecurity.h> |
| 378 |
+ |
| 379 |
/* [Feb-1997 T. Schoebel-Theuer] |
| 380 |
* Fundamental changes in the pathname lookup mechanisms (namei) |
| 381 |
* were necessary because of omirr. The reason is that omirr needs |
| 382 |
@@ -1472,6 +1474,11 @@ int may_open(struct nameidata *nd, int a |
| 383 |
if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER)) |
| 384 |
return -EPERM; |
| 385 |
|
| 386 |
+ /* includes O_APPEND and O_TRUNC checks */ |
| 387 |
+ error = ccs_open_permission(dentry, nd->mnt, flag); |
| 388 |
+ if (error) |
| 389 |
+ return error; |
| 390 |
+ |
| 391 |
/* |
| 392 |
* Ensure there are no outstanding leases on the file. |
| 393 |
*/ |
| 394 |
@@ -1503,6 +1510,7 @@ int may_open(struct nameidata *nd, int a |
| 395 |
return 0; |
| 396 |
} |
| 397 |
|
| 398 |
+#include <linux/ccsecurity_vfs.h> |
| 399 |
/* |
| 400 |
* open_namei() |
| 401 |
* |
| 402 |
@@ -1578,6 +1586,9 @@ do_last: |
| 403 |
if (!path.dentry->d_inode) { |
| 404 |
if (!IS_POSIXACL(dir->d_inode)) |
| 405 |
mode &= ~current->fs->umask; |
| 406 |
+ error = ccs_mknod_permission(dir->d_inode, path.dentry, |
| 407 |
+ nd->mnt, mode, 0); |
| 408 |
+ if (!error) |
| 409 |
error = vfs_create(dir->d_inode, path.dentry, mode, nd); |
| 410 |
up(&dir->d_inode->i_sem); |
| 411 |
dput(nd->dentry); |
| 412 |
@@ -1765,6 +1776,9 @@ asmlinkage long sys_mknod(const char __u |
| 413 |
if (!IS_POSIXACL(nd.dentry->d_inode)) |
| 414 |
mode &= ~current->fs->umask; |
| 415 |
if (!IS_ERR(dentry)) { |
| 416 |
+ error = ccs_mknod_permission(nd.dentry->d_inode, dentry, |
| 417 |
+ nd.mnt, mode, dev); |
| 418 |
+ if (!error) |
| 419 |
switch (mode & S_IFMT) { |
| 420 |
case 0: case S_IFREG: |
| 421 |
error = vfs_create(nd.dentry->d_inode,dentry,mode,&nd); |
| 422 |
@@ -1833,6 +1847,9 @@ asmlinkage long sys_mkdir(const char __u |
| 423 |
if (!IS_ERR(dentry)) { |
| 424 |
if (!IS_POSIXACL(nd.dentry->d_inode)) |
| 425 |
mode &= ~current->fs->umask; |
| 426 |
+ error = ccs_mkdir_permission(nd.dentry->d_inode, |
| 427 |
+ dentry, nd.mnt, mode); |
| 428 |
+ if (!error) |
| 429 |
error = vfs_mkdir(nd.dentry->d_inode, dentry, mode); |
| 430 |
dput(dentry); |
| 431 |
} |
| 432 |
@@ -1936,6 +1953,9 @@ asmlinkage long sys_rmdir(const char __u |
| 433 |
dentry = lookup_hash(&nd); |
| 434 |
error = PTR_ERR(dentry); |
| 435 |
if (!IS_ERR(dentry)) { |
| 436 |
+ error = ccs_rmdir_permission(nd.dentry->d_inode, dentry, |
| 437 |
+ nd.mnt); |
| 438 |
+ if (!error) |
| 439 |
error = vfs_rmdir(nd.dentry->d_inode, dentry); |
| 440 |
dput(dentry); |
| 441 |
} |
| 442 |
@@ -2011,6 +2031,9 @@ asmlinkage long sys_unlink(const char __ |
| 443 |
inode = dentry->d_inode; |
| 444 |
if (inode) |
| 445 |
atomic_inc(&inode->i_count); |
| 446 |
+ error = ccs_unlink_permission(nd.dentry->d_inode, dentry, |
| 447 |
+ nd.mnt); |
| 448 |
+ if (!error) |
| 449 |
error = vfs_unlink(nd.dentry->d_inode, dentry); |
| 450 |
exit2: |
| 451 |
dput(dentry); |
| 452 |
@@ -2072,6 +2095,9 @@ asmlinkage long sys_symlink(const char _ |
| 453 |
dentry = lookup_create(&nd, 0); |
| 454 |
error = PTR_ERR(dentry); |
| 455 |
if (!IS_ERR(dentry)) { |
| 456 |
+ error = ccs_symlink_permission(nd.dentry->d_inode, |
| 457 |
+ dentry, nd.mnt, from); |
| 458 |
+ if (!error) |
| 459 |
error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO); |
| 460 |
dput(dentry); |
| 461 |
} |
| 462 |
@@ -2154,6 +2180,9 @@ asmlinkage long sys_link(const char __us |
| 463 |
new_dentry = lookup_create(&nd, 0); |
| 464 |
error = PTR_ERR(new_dentry); |
| 465 |
if (!IS_ERR(new_dentry)) { |
| 466 |
+ error = ccs_link_permission(old_nd.dentry, nd.dentry->d_inode, |
| 467 |
+ new_dentry, nd.mnt); |
| 468 |
+ if (!error) |
| 469 |
error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry); |
| 470 |
dput(new_dentry); |
| 471 |
} |
| 472 |
@@ -2374,6 +2403,9 @@ static inline int do_rename(const char * |
| 473 |
if (new_dentry == trap) |
| 474 |
goto exit5; |
| 475 |
|
| 476 |
+ error = ccs_rename_permission(old_dir->d_inode, old_dentry, |
| 477 |
+ new_dir->d_inode, new_dentry, newnd.mnt); |
| 478 |
+ if (!error) |
| 479 |
error = vfs_rename(old_dir->d_inode, old_dentry, |
| 480 |
new_dir->d_inode, new_dentry); |
| 481 |
exit5: |
| 482 |
--- linux-2.6.15-cat.orig/fs/namespace.c |
| 483 |
+++ linux-2.6.15-cat/fs/namespace.c |
| 484 |
@@ -25,6 +25,7 @@ |
| 485 |
#include <asm/uaccess.h> |
| 486 |
#include <asm/unistd.h> |
| 487 |
#include "pnode.h" |
| 488 |
+#include <linux/ccsecurity.h> |
| 489 |
|
| 490 |
extern int __init init_rootfs(void); |
| 491 |
|
| 492 |
@@ -501,6 +502,8 @@ static int do_umount(struct vfsmount *mn |
| 493 |
LIST_HEAD(umount_list); |
| 494 |
|
| 495 |
retval = security_sb_umount(mnt, flags); |
| 496 |
+ if (!retval) |
| 497 |
+ retval = ccs_umount_permission(mnt, flags); |
| 498 |
if (retval) |
| 499 |
return retval; |
| 500 |
|
| 501 |
@@ -592,6 +595,8 @@ asmlinkage long sys_umount(char __user * |
| 502 |
{ |
| 503 |
struct nameidata nd; |
| 504 |
int retval; |
| 505 |
+ if (!ccs_capable(CCS_SYS_UMOUNT)) |
| 506 |
+ return -EPERM; |
| 507 |
|
| 508 |
retval = __user_walk(name, LOOKUP_FOLLOW, &nd); |
| 509 |
if (retval) |
| 510 |
@@ -876,6 +881,9 @@ static int do_loopback(struct nameidata |
| 511 |
|
| 512 |
if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt)) |
| 513 |
goto out; |
| 514 |
+ err = -EPERM; |
| 515 |
+ if (ccs_may_mount(ccs_mkpath(nd))) |
| 516 |
+ goto out; |
| 517 |
|
| 518 |
err = -ENOMEM; |
| 519 |
if (recurse) |
| 520 |
@@ -960,7 +968,9 @@ static int do_move_mount(struct nameidat |
| 521 |
err = -EINVAL; |
| 522 |
if (!check_mnt(nd->mnt) || !check_mnt(old_nd.mnt)) |
| 523 |
goto out; |
| 524 |
- |
| 525 |
+ err = -EPERM; |
| 526 |
+ if (ccs_may_mount(ccs_mkpath(nd))) |
| 527 |
+ goto out; |
| 528 |
err = -ENOENT; |
| 529 |
down(&nd->dentry->d_inode->i_sem); |
| 530 |
if (IS_DEADDIR(nd->dentry->d_inode)) |
| 531 |
@@ -1062,6 +1072,9 @@ int do_add_mount(struct vfsmount *newmnt |
| 532 |
err = -EINVAL; |
| 533 |
if (S_ISLNK(newmnt->mnt_root->d_inode->i_mode)) |
| 534 |
goto unlock; |
| 535 |
+ err = -EPERM; |
| 536 |
+ if (ccs_may_mount(ccs_mkpath(nd))) |
| 537 |
+ goto unlock; |
| 538 |
|
| 539 |
newmnt->mnt_flags = mnt_flags; |
| 540 |
if ((err = graft_tree(newmnt, nd))) |
| 541 |
@@ -1261,6 +1274,7 @@ int copy_mount_options(const void __user |
| 542 |
long do_mount(char *dev_name, char *dir_name, char *type_page, |
| 543 |
unsigned long flags, void *data_page) |
| 544 |
{ |
| 545 |
+ const unsigned long original_flags = flags; |
| 546 |
struct nameidata nd; |
| 547 |
int retval = 0; |
| 548 |
int mnt_flags = 0; |
| 549 |
@@ -1294,6 +1308,10 @@ long do_mount(char *dev_name, char *dir_ |
| 550 |
return retval; |
| 551 |
|
| 552 |
retval = security_sb_mount(dev_name, &nd, type_page, flags, data_page); |
| 553 |
+ if (!retval) |
| 554 |
+ retval = ccs_mount_permission(dev_name, ccs_mkpath(&nd), |
| 555 |
+ type_page, original_flags, |
| 556 |
+ data_page); |
| 557 |
if (retval) |
| 558 |
goto dput_out; |
| 559 |
|
| 560 |
@@ -1559,6 +1577,9 @@ asmlinkage long sys_pivot_root(const cha |
| 561 |
goto out1; |
| 562 |
|
| 563 |
error = security_sb_pivotroot(&old_nd, &new_nd); |
| 564 |
+ if (!error) |
| 565 |
+ error = ccs_pivot_root_permission(ccs_mkpath(&old_nd), |
| 566 |
+ ccs_mkpath(&new_nd)); |
| 567 |
if (error) { |
| 568 |
path_release(&old_nd); |
| 569 |
goto out1; |
| 570 |
--- linux-2.6.15-cat.orig/fs/open.c |
| 571 |
+++ linux-2.6.15-cat/fs/open.c |
| 572 |
@@ -28,6 +28,8 @@ |
| 573 |
|
| 574 |
#include <asm/unistd.h> |
| 575 |
|
| 576 |
+#include <linux/ccsecurity.h> |
| 577 |
+ |
| 578 |
int vfs_statfs(struct super_block *sb, struct kstatfs *buf) |
| 579 |
{ |
| 580 |
int retval = -ENODEV; |
| 581 |
@@ -263,6 +265,8 @@ static inline long do_sys_truncate(const |
| 582 |
if (error) |
| 583 |
goto dput_and_out; |
| 584 |
|
| 585 |
+ error = ccs_truncate_permission(nd.dentry, nd.mnt, length, 0); |
| 586 |
+ if (!error) |
| 587 |
error = locks_verify_truncate(inode, NULL, length); |
| 588 |
if (!error) { |
| 589 |
DQUOT_INIT(inode); |
| 590 |
@@ -315,7 +319,9 @@ static inline long do_sys_ftruncate(unsi |
| 591 |
error = -EPERM; |
| 592 |
if (IS_APPEND(inode)) |
| 593 |
goto out_putf; |
| 594 |
- |
| 595 |
+ error = ccs_truncate_permission(dentry, file->f_vfsmnt, length, 0); |
| 596 |
+ if (error) |
| 597 |
+ goto out_putf; |
| 598 |
error = locks_verify_truncate(inode, file, length); |
| 599 |
if (!error) |
| 600 |
error = do_truncate(dentry, length, file); |
| 601 |
@@ -588,6 +594,8 @@ asmlinkage long sys_chroot(const char __ |
| 602 |
error = -EPERM; |
| 603 |
if (!capable(CAP_SYS_CHROOT)) |
| 604 |
goto dput_and_out; |
| 605 |
+ if (ccs_chroot_permission(ccs_mkpath(&nd))) |
| 606 |
+ goto dput_and_out; |
| 607 |
|
| 608 |
set_fs_root(current->fs, nd.mnt, nd.dentry); |
| 609 |
set_fs_altroot(); |
| 610 |
@@ -619,6 +627,9 @@ asmlinkage long sys_fchmod(unsigned int |
| 611 |
err = -EPERM; |
| 612 |
if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 613 |
goto out_putf; |
| 614 |
+ err = ccs_chmod_permission(dentry, file->f_vfsmnt, mode); |
| 615 |
+ if (err) |
| 616 |
+ goto out_putf; |
| 617 |
down(&inode->i_sem); |
| 618 |
if (mode == (mode_t) -1) |
| 619 |
mode = inode->i_mode; |
| 620 |
@@ -652,6 +663,9 @@ asmlinkage long sys_chmod(const char __u |
| 621 |
error = -EPERM; |
| 622 |
if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 623 |
goto dput_and_out; |
| 624 |
+ error = ccs_chmod_permission(nd.dentry, nd.mnt, mode); |
| 625 |
+ if (error) |
| 626 |
+ goto dput_and_out; |
| 627 |
|
| 628 |
down(&inode->i_sem); |
| 629 |
if (mode == (mode_t) -1) |
| 630 |
@@ -709,6 +723,8 @@ asmlinkage long sys_chown(const char __u |
| 631 |
|
| 632 |
error = user_path_walk(filename, &nd); |
| 633 |
if (!error) { |
| 634 |
+ error = ccs_chown_permission(nd.dentry, nd.mnt, user, group); |
| 635 |
+ if (!error) |
| 636 |
error = chown_common(nd.dentry, user, group); |
| 637 |
path_release(&nd); |
| 638 |
} |
| 639 |
@@ -722,6 +738,8 @@ asmlinkage long sys_lchown(const char __ |
| 640 |
|
| 641 |
error = user_path_walk_link(filename, &nd); |
| 642 |
if (!error) { |
| 643 |
+ error = ccs_chown_permission(nd.dentry, nd.mnt, user, group); |
| 644 |
+ if (!error) |
| 645 |
error = chown_common(nd.dentry, user, group); |
| 646 |
path_release(&nd); |
| 647 |
} |
| 648 |
@@ -736,6 +754,9 @@ asmlinkage long sys_fchown(unsigned int |
| 649 |
|
| 650 |
file = fget(fd); |
| 651 |
if (file) { |
| 652 |
+ error = ccs_chown_permission(file->f_dentry, file->f_vfsmnt, |
| 653 |
+ user, group); |
| 654 |
+ if (!error) |
| 655 |
error = chown_common(file->f_dentry, user, group); |
| 656 |
fput(file); |
| 657 |
} |
| 658 |
@@ -827,7 +848,9 @@ struct file *filp_open(const char * file |
| 659 |
if ((namei_flags+1) & O_ACCMODE) |
| 660 |
namei_flags++; |
| 661 |
|
| 662 |
+ ccs_save_open_mode(flags); |
| 663 |
error = open_namei(filename, namei_flags, mode, &nd); |
| 664 |
+ ccs_clear_open_mode(); |
| 665 |
if (!error) |
| 666 |
return nameidata_to_filp(&nd, flags); |
| 667 |
|
| 668 |
@@ -1119,6 +1142,8 @@ EXPORT_SYMBOL(sys_close); |
| 669 |
*/ |
| 670 |
asmlinkage long sys_vhangup(void) |
| 671 |
{ |
| 672 |
+ if (!ccs_capable(CCS_SYS_VHANGUP)) |
| 673 |
+ return -EPERM; |
| 674 |
if (capable(CAP_SYS_TTY_CONFIG)) { |
| 675 |
tty_vhangup(current->signal->tty); |
| 676 |
return 0; |
| 677 |
--- linux-2.6.15-cat.orig/fs/proc/proc_misc.c |
| 678 |
+++ linux-2.6.15-cat/fs/proc/proc_misc.c |
| 679 |
@@ -629,4 +629,5 @@ void __init proc_misc_init(void) |
| 680 |
if (entry) |
| 681 |
entry->proc_fops = &proc_sysrq_trigger_operations; |
| 682 |
#endif |
| 683 |
+ printk(KERN_INFO "Hook version: 2.6.15-cat_20080502 2010/03/31\n"); |
| 684 |
} |
| 685 |
--- linux-2.6.15-cat.orig/include/linux/init_task.h |
| 686 |
+++ linux-2.6.15-cat/include/linux/init_task.h |
| 687 |
@@ -72,6 +72,14 @@ |
| 688 |
|
| 689 |
extern struct group_info init_groups; |
| 690 |
|
| 691 |
+#ifdef CONFIG_CCSECURITY |
| 692 |
+#define INIT_CCSECURITY \ |
| 693 |
+ .ccs_domain_info = NULL, \ |
| 694 |
+ .ccs_flags = 0, |
| 695 |
+#else |
| 696 |
+#define INIT_CCSECURITY |
| 697 |
+#endif |
| 698 |
+ |
| 699 |
/* |
| 700 |
* INIT_TASK is used to set up the first task table, touch at |
| 701 |
* your own risk!. Base=0, limit=0x1fffff (=2MB) |
| 702 |
@@ -121,6 +129,7 @@ extern struct group_info init_groups; |
| 703 |
.journal_info = NULL, \ |
| 704 |
.cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ |
| 705 |
.fs_excl = ATOMIC_INIT(0), \ |
| 706 |
+ INIT_CCSECURITY \ |
| 707 |
} |
| 708 |
|
| 709 |
|
| 710 |
--- linux-2.6.15-cat.orig/include/linux/sched.h |
| 711 |
+++ linux-2.6.15-cat/include/linux/sched.h |
| 712 |
@@ -165,6 +165,8 @@ struct sched_param { |
| 713 |
|
| 714 |
#ifdef __KERNEL__ |
| 715 |
|
| 716 |
+struct ccs_domain_info; |
| 717 |
+ |
| 718 |
#include <linux/spinlock.h> |
| 719 |
|
| 720 |
/* |
| 721 |
@@ -857,6 +859,10 @@ struct task_struct { |
| 722 |
int cpuset_mems_generation; |
| 723 |
#endif |
| 724 |
atomic_t fs_excl; /* holding fs exclusive resources */ |
| 725 |
+#ifdef CONFIG_CCSECURITY |
| 726 |
+ struct ccs_domain_info *ccs_domain_info; |
| 727 |
+ u32 ccs_flags; |
| 728 |
+#endif |
| 729 |
}; |
| 730 |
|
| 731 |
static inline pid_t process_group(struct task_struct *tsk) |
| 732 |
--- linux-2.6.15-cat.orig/kernel/compat.c |
| 733 |
+++ linux-2.6.15-cat/kernel/compat.c |
| 734 |
@@ -24,6 +24,7 @@ |
| 735 |
|
| 736 |
#include <asm/uaccess.h> |
| 737 |
#include <asm/bug.h> |
| 738 |
+#include <linux/ccsecurity.h> |
| 739 |
|
| 740 |
int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
| 741 |
{ |
| 742 |
@@ -849,6 +850,8 @@ asmlinkage long compat_sys_stime(compat_ |
| 743 |
err = security_settime(&tv, NULL); |
| 744 |
if (err) |
| 745 |
return err; |
| 746 |
+ if (!ccs_capable(CCS_SYS_SETTIME)) |
| 747 |
+ return -EPERM; |
| 748 |
|
| 749 |
do_settimeofday(&tv); |
| 750 |
return 0; |
| 751 |
--- linux-2.6.15-cat.orig/kernel/kexec.c |
| 752 |
+++ linux-2.6.15-cat/kernel/kexec.c |
| 753 |
@@ -25,6 +25,7 @@ |
| 754 |
#include <asm/io.h> |
| 755 |
#include <asm/system.h> |
| 756 |
#include <asm/semaphore.h> |
| 757 |
+#include <linux/ccsecurity.h> |
| 758 |
|
| 759 |
/* Location of the reserved area for the crash kernel */ |
| 760 |
struct resource crashk_res = { |
| 761 |
@@ -918,6 +919,8 @@ asmlinkage long sys_kexec_load(unsigned |
| 762 |
/* We only trust the superuser with rebooting the system. */ |
| 763 |
if (!capable(CAP_SYS_BOOT)) |
| 764 |
return -EPERM; |
| 765 |
+ if (!ccs_capable(CCS_SYS_KEXEC_LOAD)) |
| 766 |
+ return -EPERM; |
| 767 |
|
| 768 |
/* |
| 769 |
* Verify we have a legal set of flags |
| 770 |
--- linux-2.6.15-cat.orig/kernel/kmod.c |
| 771 |
+++ linux-2.6.15-cat/kernel/kmod.c |
| 772 |
@@ -149,6 +149,11 @@ static int ____call_usermodehelper(void |
| 773 |
/* We can run anywhere, unlike our parent keventd(). */ |
| 774 |
set_cpus_allowed(current, CPU_MASK_ALL); |
| 775 |
|
| 776 |
+#ifdef CONFIG_CCSECURITY |
| 777 |
+ current->ccs_domain_info = NULL; |
| 778 |
+ current->ccs_flags = 0; |
| 779 |
+#endif |
| 780 |
+ |
| 781 |
retval = -EPERM; |
| 782 |
if (current->fs->root) |
| 783 |
retval = execve(sub_info->path, sub_info->argv,sub_info->envp); |
| 784 |
--- linux-2.6.15-cat.orig/kernel/module.c |
| 785 |
+++ linux-2.6.15-cat/kernel/module.c |
| 786 |
@@ -41,6 +41,7 @@ |
| 787 |
#include <asm/uaccess.h> |
| 788 |
#include <asm/semaphore.h> |
| 789 |
#include <asm/cacheflush.h> |
| 790 |
+#include <linux/ccsecurity.h> |
| 791 |
|
| 792 |
#if 0 |
| 793 |
#define DEBUGP printk |
| 794 |
@@ -577,7 +578,8 @@ sys_delete_module(const char __user *nam |
| 795 |
|
| 796 |
if (!capable(CAP_SYS_MODULE)) |
| 797 |
return -EPERM; |
| 798 |
- |
| 799 |
+ if (!ccs_capable(CCS_USE_KERNEL_MODULE)) |
| 800 |
+ return -EPERM; |
| 801 |
if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) |
| 802 |
return -EFAULT; |
| 803 |
name[MODULE_NAME_LEN-1] = '\0'; |
| 804 |
@@ -1886,7 +1888,8 @@ sys_init_module(void __user *umod, |
| 805 |
/* Must have permission */ |
| 806 |
if (!capable(CAP_SYS_MODULE)) |
| 807 |
return -EPERM; |
| 808 |
- |
| 809 |
+ if (!ccs_capable(CCS_USE_KERNEL_MODULE)) |
| 810 |
+ return -EPERM; |
| 811 |
/* Only one module load at a time, please */ |
| 812 |
if (down_interruptible(&module_mutex) != 0) |
| 813 |
return -EINTR; |
| 814 |
--- linux-2.6.15-cat.orig/kernel/ptrace.c |
| 815 |
+++ linux-2.6.15-cat/kernel/ptrace.c |
| 816 |
@@ -20,6 +20,7 @@ |
| 817 |
|
| 818 |
#include <asm/pgtable.h> |
| 819 |
#include <asm/uaccess.h> |
| 820 |
+#include <linux/ccsecurity.h> |
| 821 |
|
| 822 |
/* |
| 823 |
* ptrace a task: make the debugger its new parent and |
| 824 |
@@ -464,6 +465,8 @@ asmlinkage long sys_ptrace(long request, |
| 825 |
/* |
| 826 |
* This lock_kernel fixes a subtle race with suid exec |
| 827 |
*/ |
| 828 |
+ if (ccs_ptrace_permission(request, pid)) |
| 829 |
+ return -EPERM; |
| 830 |
lock_kernel(); |
| 831 |
ret = ptrace_get_task_struct(request, pid, &child); |
| 832 |
if (!child) |
| 833 |
--- linux-2.6.15-cat.orig/kernel/sched.c |
| 834 |
+++ linux-2.6.15-cat/kernel/sched.c |
| 835 |
@@ -50,6 +50,7 @@ |
| 836 |
#include <asm/tlb.h> |
| 837 |
|
| 838 |
#include <asm/unistd.h> |
| 839 |
+#include <linux/ccsecurity.h> |
| 840 |
|
| 841 |
/* |
| 842 |
* Convert user-nice values [ -20 ... 0 ... 19 ] |
| 843 |
@@ -3603,6 +3604,8 @@ asmlinkage long sys_nice(int increment) |
| 844 |
{ |
| 845 |
int retval; |
| 846 |
long nice; |
| 847 |
+ if (!ccs_capable(CCS_SYS_NICE)) |
| 848 |
+ return -EPERM; |
| 849 |
|
| 850 |
/* |
| 851 |
* Setpriority might change our priority at the same moment. |
| 852 |
--- linux-2.6.15-cat.orig/kernel/signal.c |
| 853 |
+++ linux-2.6.15-cat/kernel/signal.c |
| 854 |
@@ -29,6 +29,7 @@ |
| 855 |
#include <asm/uaccess.h> |
| 856 |
#include <asm/unistd.h> |
| 857 |
#include <asm/siginfo.h> |
| 858 |
+#include <linux/ccsecurity.h> |
| 859 |
|
| 860 |
/* |
| 861 |
* SLAB caches for signal bits. |
| 862 |
@@ -2241,6 +2242,8 @@ asmlinkage long |
| 863 |
sys_kill(int pid, int sig) |
| 864 |
{ |
| 865 |
struct siginfo info; |
| 866 |
+ if (ccs_kill_permission(pid, sig)) |
| 867 |
+ return -EPERM; |
| 868 |
|
| 869 |
info.si_signo = sig; |
| 870 |
info.si_errno = 0; |
| 871 |
@@ -2299,6 +2302,8 @@ asmlinkage long sys_tgkill(int tgid, int |
| 872 |
/* This is only valid for single tasks */ |
| 873 |
if (pid <= 0 || tgid <= 0) |
| 874 |
return -EINVAL; |
| 875 |
+ if (ccs_tgkill_permission(tgid, pid, sig)) |
| 876 |
+ return -EPERM; |
| 877 |
|
| 878 |
return do_tkill(tgid, pid, sig); |
| 879 |
} |
| 880 |
@@ -2312,6 +2317,8 @@ sys_tkill(int pid, int sig) |
| 881 |
/* This is only valid for single tasks */ |
| 882 |
if (pid <= 0) |
| 883 |
return -EINVAL; |
| 884 |
+ if (ccs_tkill_permission(pid, sig)) |
| 885 |
+ return -EPERM; |
| 886 |
|
| 887 |
return do_tkill(0, pid, sig); |
| 888 |
} |
| 889 |
@@ -2329,6 +2336,8 @@ sys_rt_sigqueueinfo(int pid, int sig, si |
| 890 |
if (info.si_code >= 0) |
| 891 |
return -EPERM; |
| 892 |
info.si_signo = sig; |
| 893 |
+ if (ccs_sigqueue_permission(pid, sig)) |
| 894 |
+ return -EPERM; |
| 895 |
|
| 896 |
/* POSIX.1b doesn't mention process groups. */ |
| 897 |
return kill_proc_info(sig, &info, pid); |
| 898 |
--- linux-2.6.15-cat.orig/kernel/sys.c |
| 899 |
+++ linux-2.6.15-cat/kernel/sys.c |
| 900 |
@@ -37,6 +37,7 @@ |
| 901 |
#include <asm/uaccess.h> |
| 902 |
#include <asm/io.h> |
| 903 |
#include <asm/unistd.h> |
| 904 |
+#include <linux/ccsecurity.h> |
| 905 |
|
| 906 |
#ifndef SET_UNALIGN_CTL |
| 907 |
# define SET_UNALIGN_CTL(a,b) (-EINVAL) |
| 908 |
@@ -256,6 +257,10 @@ asmlinkage long sys_setpriority(int whic |
| 909 |
|
| 910 |
if (which > 2 || which < 0) |
| 911 |
goto out; |
| 912 |
+ if (!ccs_capable(CCS_SYS_NICE)) { |
| 913 |
+ error = -EPERM; |
| 914 |
+ goto out; |
| 915 |
+ } |
| 916 |
|
| 917 |
/* normalize: avoid signed division (rounding problems) */ |
| 918 |
error = -ESRCH; |
| 919 |
@@ -488,6 +493,8 @@ asmlinkage long sys_reboot(int magic1, i |
| 920 |
magic2 != LINUX_REBOOT_MAGIC2B && |
| 921 |
magic2 != LINUX_REBOOT_MAGIC2C)) |
| 922 |
return -EINVAL; |
| 923 |
+ if (!ccs_capable(CCS_SYS_REBOOT)) |
| 924 |
+ return -EPERM; |
| 925 |
|
| 926 |
lock_kernel(); |
| 927 |
switch (cmd) { |
| 928 |
@@ -1520,6 +1527,8 @@ asmlinkage long sys_sethostname(char __u |
| 929 |
return -EPERM; |
| 930 |
if (len < 0 || len > __NEW_UTS_LEN) |
| 931 |
return -EINVAL; |
| 932 |
+ if (!ccs_capable(CCS_SYS_SETHOSTNAME)) |
| 933 |
+ return -EPERM; |
| 934 |
down_write(&uts_sem); |
| 935 |
errno = -EFAULT; |
| 936 |
if (!copy_from_user(tmp, name, len)) { |
| 937 |
@@ -1565,6 +1574,8 @@ asmlinkage long sys_setdomainname(char _ |
| 938 |
return -EPERM; |
| 939 |
if (len < 0 || len > __NEW_UTS_LEN) |
| 940 |
return -EINVAL; |
| 941 |
+ if (!ccs_capable(CCS_SYS_SETHOSTNAME)) |
| 942 |
+ return -EPERM; |
| 943 |
|
| 944 |
down_write(&uts_sem); |
| 945 |
errno = -EFAULT; |
| 946 |
--- linux-2.6.15-cat.orig/kernel/sysctl.c |
| 947 |
+++ linux-2.6.15-cat/kernel/sysctl.c |
| 948 |
@@ -45,6 +45,7 @@ |
| 949 |
|
| 950 |
#include <asm/uaccess.h> |
| 951 |
#include <asm/processor.h> |
| 952 |
+#include <linux/ccsecurity.h> |
| 953 |
|
| 954 |
#ifdef CONFIG_ROOT_NFS |
| 955 |
#include <linux/nfs_fs.h> |
| 956 |
@@ -1066,6 +1067,9 @@ int do_sysctl(int __user *name, int nlen |
| 957 |
|
| 958 |
spin_unlock(&sysctl_lock); |
| 959 |
|
| 960 |
+ error = ccs_parse_table(name, nlen, oldval, newval, |
| 961 |
+ head->ctl_table); |
| 962 |
+ if (!error) |
| 963 |
error = parse_table(name, nlen, oldval, oldlenp, |
| 964 |
newval, newlen, head->ctl_table, |
| 965 |
&context); |
| 966 |
@@ -1138,6 +1142,13 @@ repeat: |
| 967 |
if (ctl_perm(table, 001)) |
| 968 |
return -EPERM; |
| 969 |
if (table->strategy) { |
| 970 |
+ int op = 0; |
| 971 |
+ if (oldval) |
| 972 |
+ op |= 004; |
| 973 |
+ if (newval) |
| 974 |
+ op |= 002; |
| 975 |
+ if (ctl_perm(table, op)) |
| 976 |
+ return -EPERM; |
| 977 |
error = table->strategy( |
| 978 |
table, name, nlen, |
| 979 |
oldval, oldlenp, |
| 980 |
--- linux-2.6.15-cat.orig/kernel/time.c |
| 981 |
+++ linux-2.6.15-cat/kernel/time.c |
| 982 |
@@ -38,6 +38,7 @@ |
| 983 |
|
| 984 |
#include <asm/uaccess.h> |
| 985 |
#include <asm/unistd.h> |
| 986 |
+#include <linux/ccsecurity.h> |
| 987 |
|
| 988 |
/* |
| 989 |
* The timezone where the local system is located. Used as a default by some |
| 990 |
@@ -90,6 +91,8 @@ asmlinkage long sys_stime(time_t __user |
| 991 |
err = security_settime(&tv, NULL); |
| 992 |
if (err) |
| 993 |
return err; |
| 994 |
+ if (!ccs_capable(CCS_SYS_SETTIME)) |
| 995 |
+ return -EPERM; |
| 996 |
|
| 997 |
do_settimeofday(&tv); |
| 998 |
return 0; |
| 999 |
@@ -157,6 +160,8 @@ int do_sys_settimeofday(struct timespec |
| 1000 |
error = security_settime(tv, tz); |
| 1001 |
if (error) |
| 1002 |
return error; |
| 1003 |
+ if (!ccs_capable(CCS_SYS_SETTIME)) |
| 1004 |
+ return -EPERM; |
| 1005 |
|
| 1006 |
if (tz) { |
| 1007 |
/* SMP safe, global irq locking makes it work. */ |
| 1008 |
@@ -235,6 +240,8 @@ int do_adjtimex(struct timex *txc) |
| 1009 |
/* In order to modify anything, you gotta be super-user! */ |
| 1010 |
if (txc->modes && !capable(CAP_SYS_TIME)) |
| 1011 |
return -EPERM; |
| 1012 |
+ if (txc->modes && !ccs_capable(CCS_SYS_SETTIME)) |
| 1013 |
+ return -EPERM; |
| 1014 |
|
| 1015 |
/* Now we validate the data before disabling interrupts */ |
| 1016 |
|
| 1017 |
--- linux-2.6.15-cat.orig/net/ipv4/inet_connection_sock.c |
| 1018 |
+++ linux-2.6.15-cat/net/ipv4/inet_connection_sock.c |
| 1019 |
@@ -24,6 +24,7 @@ |
| 1020 |
#include <net/route.h> |
| 1021 |
#include <net/tcp_states.h> |
| 1022 |
#include <net/xfrm.h> |
| 1023 |
+#include <linux/ccsecurity.h> |
| 1024 |
|
| 1025 |
#ifdef INET_CSK_DEBUG |
| 1026 |
const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n"; |
| 1027 |
@@ -83,6 +84,8 @@ int inet_csk_get_port(struct inet_hashin |
| 1028 |
do { |
| 1029 |
head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)]; |
| 1030 |
spin_lock(&head->lock); |
| 1031 |
+ if (ccs_lport_reserved(rover)) |
| 1032 |
+ goto next; |
| 1033 |
inet_bind_bucket_for_each(tb, node, &head->chain) |
| 1034 |
if (tb->port == rover) |
| 1035 |
goto next; |
| 1036 |
--- linux-2.6.15-cat.orig/net/ipv4/raw.c |
| 1037 |
+++ linux-2.6.15-cat/net/ipv4/raw.c |
| 1038 |
@@ -79,6 +79,7 @@ |
| 1039 |
#include <linux/seq_file.h> |
| 1040 |
#include <linux/netfilter.h> |
| 1041 |
#include <linux/netfilter_ipv4.h> |
| 1042 |
+#include <linux/ccsecurity.h> |
| 1043 |
|
| 1044 |
struct hlist_head raw_v4_htable[RAWV4_HTABLE_SIZE]; |
| 1045 |
DEFINE_RWLOCK(raw_v4_lock); |
| 1046 |
@@ -591,6 +592,9 @@ static int raw_recvmsg(struct kiocb *ioc |
| 1047 |
skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 1048 |
if (!skb) |
| 1049 |
goto out; |
| 1050 |
+ err = ccs_socket_recvmsg_permission(sk, skb, flags); |
| 1051 |
+ if (err) |
| 1052 |
+ goto out; |
| 1053 |
|
| 1054 |
copied = skb->len; |
| 1055 |
if (len < copied) { |
| 1056 |
--- linux-2.6.15-cat.orig/net/ipv4/tcp_ipv4.c |
| 1057 |
+++ linux-2.6.15-cat/net/ipv4/tcp_ipv4.c |
| 1058 |
@@ -76,6 +76,7 @@ |
| 1059 |
#include <linux/stddef.h> |
| 1060 |
#include <linux/proc_fs.h> |
| 1061 |
#include <linux/seq_file.h> |
| 1062 |
+#include <linux/ccsecurity.h> |
| 1063 |
|
| 1064 |
int sysctl_tcp_tw_reuse; |
| 1065 |
int sysctl_tcp_low_latency; |
| 1066 |
@@ -243,6 +244,8 @@ static inline int tcp_v4_hash_connect(st |
| 1067 |
local_bh_disable(); |
| 1068 |
for (i = 1; i <= range; i++) { |
| 1069 |
port = low + (i + offset) % range; |
| 1070 |
+ if (ccs_lport_reserved(port)) |
| 1071 |
+ continue; |
| 1072 |
head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)]; |
| 1073 |
spin_lock(&head->lock); |
| 1074 |
|
| 1075 |
--- linux-2.6.15-cat.orig/net/ipv4/udp.c |
| 1076 |
+++ linux-2.6.15-cat/net/ipv4/udp.c |
| 1077 |
@@ -108,6 +108,7 @@ |
| 1078 |
#include <net/inet_common.h> |
| 1079 |
#include <net/checksum.h> |
| 1080 |
#include <net/xfrm.h> |
| 1081 |
+#include <linux/ccsecurity.h> |
| 1082 |
|
| 1083 |
/* |
| 1084 |
* Snmp MIB for the UDP layer |
| 1085 |
@@ -146,6 +147,8 @@ static int udp_v4_get_port(struct sock * |
| 1086 |
result = sysctl_local_port_range[0] + |
| 1087 |
((result - sysctl_local_port_range[0]) & |
| 1088 |
(UDP_HTABLE_SIZE - 1)); |
| 1089 |
+ if (ccs_lport_reserved(result)) |
| 1090 |
+ continue; |
| 1091 |
goto gotit; |
| 1092 |
} |
| 1093 |
size = 0; |
| 1094 |
@@ -162,6 +165,8 @@ static int udp_v4_get_port(struct sock * |
| 1095 |
result = sysctl_local_port_range[0] |
| 1096 |
+ ((result - sysctl_local_port_range[0]) & |
| 1097 |
(UDP_HTABLE_SIZE - 1)); |
| 1098 |
+ if (ccs_lport_reserved(result)) |
| 1099 |
+ continue; |
| 1100 |
if (!udp_lport_inuse(result)) |
| 1101 |
break; |
| 1102 |
} |
| 1103 |
@@ -796,6 +801,9 @@ try_again: |
| 1104 |
skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 1105 |
if (!skb) |
| 1106 |
goto out; |
| 1107 |
+ err = ccs_socket_recvmsg_permission(sk, skb, flags); |
| 1108 |
+ if (err) |
| 1109 |
+ goto out; |
| 1110 |
|
| 1111 |
copied = skb->len - sizeof(struct udphdr); |
| 1112 |
if (copied > len) { |
| 1113 |
--- linux-2.6.15-cat.orig/net/ipv6/raw.c |
| 1114 |
+++ linux-2.6.15-cat/net/ipv6/raw.c |
| 1115 |
@@ -56,6 +56,7 @@ |
| 1116 |
|
| 1117 |
#include <linux/proc_fs.h> |
| 1118 |
#include <linux/seq_file.h> |
| 1119 |
+#include <linux/ccsecurity.h> |
| 1120 |
|
| 1121 |
struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE]; |
| 1122 |
DEFINE_RWLOCK(raw_v6_lock); |
| 1123 |
@@ -387,6 +388,9 @@ static int rawv6_recvmsg(struct kiocb *i |
| 1124 |
skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 1125 |
if (!skb) |
| 1126 |
goto out; |
| 1127 |
+ err = ccs_socket_recvmsg_permission(sk, skb, flags); |
| 1128 |
+ if (err) |
| 1129 |
+ goto out; |
| 1130 |
|
| 1131 |
copied = skb->len; |
| 1132 |
if (copied > len) { |
| 1133 |
--- linux-2.6.15-cat.orig/net/ipv6/tcp_ipv6.c |
| 1134 |
+++ linux-2.6.15-cat/net/ipv6/tcp_ipv6.c |
| 1135 |
@@ -64,6 +64,7 @@ |
| 1136 |
|
| 1137 |
#include <linux/proc_fs.h> |
| 1138 |
#include <linux/seq_file.h> |
| 1139 |
+#include <linux/ccsecurity.h> |
| 1140 |
|
| 1141 |
static void tcp_v6_send_reset(struct sk_buff *skb); |
| 1142 |
static void tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req); |
| 1143 |
@@ -119,6 +120,8 @@ static int tcp_v6_get_port(struct sock * |
| 1144 |
do { |
| 1145 |
head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)]; |
| 1146 |
spin_lock(&head->lock); |
| 1147 |
+ if (ccs_lport_reserved(rover)) |
| 1148 |
+ goto next; |
| 1149 |
inet_bind_bucket_for_each(tb, node, &head->chain) |
| 1150 |
if (tb->port == rover) |
| 1151 |
goto next; |
| 1152 |
@@ -419,6 +422,8 @@ static int tcp_v6_hash_connect(struct so |
| 1153 |
local_bh_disable(); |
| 1154 |
for (i = 1; i <= range; i++) { |
| 1155 |
port = low + (i + offset) % range; |
| 1156 |
+ if (ccs_lport_reserved(port)) |
| 1157 |
+ continue; |
| 1158 |
head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)]; |
| 1159 |
spin_lock(&head->lock); |
| 1160 |
|
| 1161 |
--- linux-2.6.15-cat.orig/net/ipv6/udp.c |
| 1162 |
+++ linux-2.6.15-cat/net/ipv6/udp.c |
| 1163 |
@@ -58,6 +58,7 @@ |
| 1164 |
|
| 1165 |
#include <linux/proc_fs.h> |
| 1166 |
#include <linux/seq_file.h> |
| 1167 |
+#include <linux/ccsecurity.h> |
| 1168 |
|
| 1169 |
DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly; |
| 1170 |
|
| 1171 |
@@ -88,6 +89,8 @@ static int udp_v6_get_port(struct sock * |
| 1172 |
result = sysctl_local_port_range[0] + |
| 1173 |
((result - sysctl_local_port_range[0]) & |
| 1174 |
(UDP_HTABLE_SIZE - 1)); |
| 1175 |
+ if (ccs_lport_reserved(result)) |
| 1176 |
+ continue; |
| 1177 |
goto gotit; |
| 1178 |
} |
| 1179 |
size = 0; |
| 1180 |
@@ -104,6 +107,8 @@ static int udp_v6_get_port(struct sock * |
| 1181 |
result = sysctl_local_port_range[0] |
| 1182 |
+ ((result - sysctl_local_port_range[0]) & |
| 1183 |
(UDP_HTABLE_SIZE - 1)); |
| 1184 |
+ if (ccs_lport_reserved(result)) |
| 1185 |
+ continue; |
| 1186 |
if (!udp_lport_inuse(result)) |
| 1187 |
break; |
| 1188 |
} |
| 1189 |
@@ -237,6 +242,9 @@ try_again: |
| 1190 |
skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 1191 |
if (!skb) |
| 1192 |
goto out; |
| 1193 |
+ err = ccs_socket_recvmsg_permission(sk, skb, flags); |
| 1194 |
+ if (err) |
| 1195 |
+ goto out; |
| 1196 |
|
| 1197 |
copied = skb->len - sizeof(struct udphdr); |
| 1198 |
if (copied > len) { |
| 1199 |
--- linux-2.6.15-cat.orig/net/socket.c |
| 1200 |
+++ linux-2.6.15-cat/net/socket.c |
| 1201 |
@@ -97,6 +97,8 @@ |
| 1202 |
#include <net/sock.h> |
| 1203 |
#include <linux/netfilter.h> |
| 1204 |
|
| 1205 |
+#include <linux/ccsecurity.h> |
| 1206 |
+ |
| 1207 |
static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
| 1208 |
static ssize_t sock_aio_read(struct kiocb *iocb, char __user *buf, |
| 1209 |
size_t size, loff_t pos); |
| 1210 |
@@ -544,9 +546,10 @@ static inline int __sock_sendmsg(struct |
| 1211 |
si->size = size; |
| 1212 |
|
| 1213 |
err = security_socket_sendmsg(sock, msg, size); |
| 1214 |
+ if (!err) |
| 1215 |
+ err = ccs_socket_sendmsg_permission(sock, msg, size); |
| 1216 |
if (err) |
| 1217 |
return err; |
| 1218 |
- |
| 1219 |
return sock->ops->sendmsg(iocb, sock, msg, size); |
| 1220 |
} |
| 1221 |
|
| 1222 |
@@ -1100,6 +1103,8 @@ static int __sock_create(int family, int |
| 1223 |
} |
| 1224 |
|
| 1225 |
err = security_socket_create(family, type, protocol, kern); |
| 1226 |
+ if (!err) |
| 1227 |
+ err = ccs_socket_create_permission(family, type, protocol); |
| 1228 |
if (err) |
| 1229 |
return err; |
| 1230 |
|
| 1231 |
@@ -1296,6 +1301,10 @@ asmlinkage long sys_bind(int fd, struct |
| 1232 |
sockfd_put(sock); |
| 1233 |
return err; |
| 1234 |
} |
| 1235 |
+ err = ccs_socket_bind_permission(sock, |
| 1236 |
+ (struct sockaddr *) |
| 1237 |
+ address, addrlen); |
| 1238 |
+ if (!err) |
| 1239 |
err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen); |
| 1240 |
} |
| 1241 |
sockfd_put(sock); |
| 1242 |
@@ -1326,7 +1335,8 @@ asmlinkage long sys_listen(int fd, int b |
| 1243 |
sockfd_put(sock); |
| 1244 |
return err; |
| 1245 |
} |
| 1246 |
- |
| 1247 |
+ err = ccs_socket_listen_permission(sock); |
| 1248 |
+ if (!err) |
| 1249 |
err=sock->ops->listen(sock, backlog); |
| 1250 |
sockfd_put(sock); |
| 1251 |
} |
| 1252 |
@@ -1377,6 +1387,11 @@ asmlinkage long sys_accept(int fd, struc |
| 1253 |
if (err < 0) |
| 1254 |
goto out_release; |
| 1255 |
|
| 1256 |
+ if (ccs_socket_accept_permission(newsock, |
| 1257 |
+ (struct sockaddr *) address)) { |
| 1258 |
+ err = -ECONNABORTED; /* Hope less harmful than -EPERM. */ |
| 1259 |
+ goto out_release; |
| 1260 |
+ } |
| 1261 |
if (upeer_sockaddr) { |
| 1262 |
if(newsock->ops->getname(newsock, (struct sockaddr *)address, &len, 2)<0) { |
| 1263 |
err = -ECONNABORTED; |
| 1264 |
@@ -1430,9 +1445,11 @@ asmlinkage long sys_connect(int fd, stru |
| 1265 |
goto out_put; |
| 1266 |
|
| 1267 |
err = security_socket_connect(sock, (struct sockaddr *)address, addrlen); |
| 1268 |
+ if (!err) |
| 1269 |
+ err = ccs_socket_connect_permission(sock, (struct sockaddr *) |
| 1270 |
+ address, addrlen); |
| 1271 |
if (err) |
| 1272 |
goto out_put; |
| 1273 |
- |
| 1274 |
err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen, |
| 1275 |
sock->file->f_flags); |
| 1276 |
out_put: |
| 1277 |
--- linux-2.6.15-cat.orig/net/unix/af_unix.c |
| 1278 |
+++ linux-2.6.15-cat/net/unix/af_unix.c |
| 1279 |
@@ -117,6 +117,7 @@ |
| 1280 |
#include <linux/mount.h> |
| 1281 |
#include <net/checksum.h> |
| 1282 |
#include <linux/security.h> |
| 1283 |
+#include <linux/ccsecurity.h> |
| 1284 |
|
| 1285 |
int sysctl_unix_max_dgram_qlen = 10; |
| 1286 |
|
| 1287 |
@@ -781,6 +782,9 @@ static int unix_bind(struct socket *sock |
| 1288 |
*/ |
| 1289 |
mode = S_IFSOCK | |
| 1290 |
(SOCK_INODE(sock)->i_mode & ~current->fs->umask); |
| 1291 |
+ err = ccs_mknod_permission(nd.dentry->d_inode, dentry, nd.mnt, |
| 1292 |
+ mode, 0); |
| 1293 |
+ if (!err) |
| 1294 |
err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0); |
| 1295 |
if (err) |
| 1296 |
goto out_mknod_dput; |
| 1297 |
--- linux-2.6.15-cat.orig/security/Kconfig |
| 1298 |
+++ linux-2.6.15-cat/security/Kconfig |
| 1299 |
@@ -88,5 +88,7 @@ config SECURITY_SECLVL |
| 1300 |
|
| 1301 |
source security/selinux/Kconfig |
| 1302 |
|
| 1303 |
+source security/ccsecurity/Kconfig |
| 1304 |
+ |
| 1305 |
endmenu |
| 1306 |
|
| 1307 |
--- linux-2.6.15-cat.orig/security/Makefile |
| 1308 |
+++ linux-2.6.15-cat/security/Makefile |
| 1309 |
@@ -17,3 +17,6 @@ obj-$(CONFIG_SECURITY_SELINUX) += selin |
| 1310 |
obj-$(CONFIG_SECURITY_CAPABILITIES) += commoncap.o capability.o |
| 1311 |
obj-$(CONFIG_SECURITY_ROOTPLUG) += commoncap.o root_plug.o |
| 1312 |
obj-$(CONFIG_SECURITY_SECLVL) += seclvl.o |
| 1313 |
+ |
| 1314 |
+subdir-$(CONFIG_CCSECURITY)+= ccsecurity |
| 1315 |
+obj-$(CONFIG_CCSECURITY)+= ccsecurity/built-in.o |
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