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linux-4.4.4-sbox.patch
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linux-4.4.4-sbox.patch
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diff -crb linux-4.4.4-unpatched/arch/x86/ia32/sys_ia32.c linux-4.4.4-patched/arch/x86/ia32/sys_ia32.c
*** linux-4.4.4-unpatched/arch/x86/ia32/sys_ia32.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/arch/x86/ia32/sys_ia32.c 2016-03-05 19:07:03.743861345 +0300
***************
*** 95,106 ****
return 0;
}
asmlinkage long sys32_stat64(const char __user *filename,
struct stat64 __user *statbuf)
{
struct kstat stat;
! int ret = vfs_stat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
--- 95,120 ----
return 0;
}
+ int cher_patch_is_secure_path(const char *);
+
asmlinkage long sys32_stat64(const char __user *filename,
struct stat64 __user *statbuf)
{
struct kstat stat;
! int ret = 0;
!
! if (SBOX_IS_RESTRICTED()) {
! struct filename *tmp = getname(filename);
! if (IS_ERR(tmp)) return -EINVAL;
! if (cher_patch_is_secure_path(tmp->name) < 0) {
! putname(tmp);
! return -EPERM;
! }
! if (!strncmp(tmp->name, "/SANDBOX/", 9)) filename += 9;
! putname(tmp);
! }
+ ret = vfs_stat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
***************
*** 110,116 ****
struct stat64 __user *statbuf)
{
struct kstat stat;
! int ret = vfs_lstat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
--- 124,143 ----
struct stat64 __user *statbuf)
{
struct kstat stat;
! int ret = 0;
!
! if (SBOX_IS_RESTRICTED()) {
! struct filename *tmp = getname(filename);
! if (IS_ERR(tmp)) return -EINVAL;
! if (cher_patch_is_secure_path(tmp->name) < 0) {
! putname(tmp);
! return -EPERM;
! }
! if (!strncmp(tmp->name, "/SANDBOX/", 9)) filename += 9;
! putname(tmp);
! }
!
! ret = vfs_lstat(filename, &stat);
if (!ret)
ret = cp_stat64(statbuf, &stat);
return ret;
***************
*** 131,136 ****
--- 158,167 ----
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
error = vfs_fstatat(dfd, filename, &stat, flag);
if (error)
return error;
diff -crb linux-4.4.4-unpatched/arch/x86/kernel/ioport.c linux-4.4.4-patched/arch/x86/kernel/ioport.c
*** linux-4.4.4-unpatched/arch/x86/kernel/ioport.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/arch/x86/kernel/ioport.c 2016-03-05 19:07:04.475861323 +0300
***************
*** 26,31 ****
--- 26,36 ----
struct tss_struct *tss;
unsigned int i, max_long, bytes, bytes_updated;
+ if (SBOX_IS_RESTRICTED()) {
+ //SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
return -EINVAL;
if (turn_on && !capable(CAP_SYS_RAWIO))
***************
*** 99,104 ****
--- 104,114 ----
unsigned int old = (regs->flags >> 12) & 3;
struct thread_struct *t = ¤t->thread;
+ if (SBOX_IS_RESTRICTED()) {
+ //SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (level > 3)
return -EINVAL;
/* Trying to gain more privileges? */
diff -crb linux-4.4.4-unpatched/arch/x86/kernel/ldt.c linux-4.4.4-patched/arch/x86/kernel/ldt.c
*** linux-4.4.4-unpatched/arch/x86/kernel/ldt.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/arch/x86/kernel/ldt.c 2016-03-05 19:07:06.497861263 +0300
***************
*** 276,281 ****
--- 276,286 ----
{
int ret = -ENOSYS;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
switch (func) {
case 0:
ret = read_ldt(ptr, bytecount);
diff -crb linux-4.4.4-unpatched/arch/x86/kernel/vm86_32.c linux-4.4.4-patched/arch/x86/kernel/vm86_32.c
*** linux-4.4.4-unpatched/arch/x86/kernel/vm86_32.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/arch/x86/kernel/vm86_32.c 2016-03-05 19:07:06.549861262 +0300
***************
*** 226,231 ****
--- 226,235 ----
static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus)
{
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
struct tss_struct *tss;
struct task_struct *tsk = current;
struct vm86 *vm86 = tsk->thread.vm86;
diff -crb linux-4.4.4-unpatched/fs/aio.c linux-4.4.4-patched/fs/aio.c
*** linux-4.4.4-unpatched/fs/aio.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/aio.c 2016-03-05 19:08:36.242858611 +0300
***************
*** 1319,1324 ****
--- 1319,1327 ----
unsigned long ctx;
long ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
ret = get_user(ctx, ctxp);
if (unlikely(ret))
goto out;
***************
*** 1351,1359 ****
*/
SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
{
! struct kioctx *ioctx = lookup_ioctx(ctx);
if (likely(NULL != ioctx)) {
struct ctx_rq_wait wait;
int ret;
init_completion(&wait.comp);
--- 1354,1369 ----
*/
SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
{
! struct kioctx *ioctx = NULL;
!
! if (SBOX_IS_RESTRICTED()) {
! return -EPERM;
! }
!
! ioctx = lookup_ioctx(ctx);
if (likely(NULL != ioctx)) {
struct ctx_rq_wait wait;
+
int ret;
init_completion(&wait.comp);
***************
*** 1637,1642 ****
--- 1647,1655 ----
SYSCALL_DEFINE3(io_submit, aio_context_t, ctx_id, long, nr,
struct iocb __user * __user *, iocbpp)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
return do_io_submit(ctx_id, nr, iocbpp, 0);
}
***************
*** 1679,1684 ****
--- 1692,1700 ----
u32 key;
int ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
ret = get_user(key, &iocb->aio_key);
if (unlikely(ret))
return -EFAULT;
***************
*** 1729,1737 ****
struct io_event __user *, events,
struct timespec __user *, timeout)
{
! struct kioctx *ioctx = lookup_ioctx(ctx_id);
long ret = -EINVAL;
if (likely(ioctx)) {
if (likely(min_nr <= nr && min_nr >= 0))
ret = read_events(ioctx, min_nr, nr, events, timeout);
--- 1745,1757 ----
struct io_event __user *, events,
struct timespec __user *, timeout)
{
! struct kioctx *ioctx;
long ret = -EINVAL;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
+ ioctx = lookup_ioctx(ctx_id);
if (likely(ioctx)) {
if (likely(min_nr <= nr && min_nr >= 0))
ret = read_events(ioctx, min_nr, nr, events, timeout);
diff -crb linux-4.4.4-unpatched/fs/buffer.c linux-4.4.4-patched/fs/buffer.c
*** linux-4.4.4-unpatched/fs/buffer.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/buffer.c 2016-03-05 19:08:32.655858717 +0300
***************
*** 3271,3276 ****
--- 3271,3279 ----
{
static int msg_count;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
diff -crb linux-4.4.4-unpatched/fs/compat.c linux-4.4.4-patched/fs/compat.c
*** linux-4.4.4-unpatched/fs/compat.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/compat.c 2016-03-05 19:08:33.039858706 +0300
***************
*** 77,82 ****
--- 77,87 ----
{
struct timespec tv[2];
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (t) {
if (get_user(tv[0].tv_sec, &t->actime) ||
get_user(tv[1].tv_sec, &t->modtime))
***************
*** 91,96 ****
--- 96,106 ----
{
struct timespec tv[2];
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (t) {
if (compat_get_timespec(&tv[0], &t[0]) ||
compat_get_timespec(&tv[1], &t[1]))
***************
*** 106,111 ****
--- 116,126 ----
{
struct timespec tv[2];
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (t) {
if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
***************
*** 159,170 ****
--- 174,198 ----
return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
}
+ int cher_patch_is_secure_path(const char*);
+
COMPAT_SYSCALL_DEFINE2(newstat, const char __user *, filename,
struct compat_stat __user *, statbuf)
{
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ struct filename *tmp = getname(filename);
+ if (IS_ERR(tmp)) return -EINVAL;
+ if (cher_patch_is_secure_path(tmp->name) < 0) {
+ putname(tmp);
+ return -EPERM;
+ }
+ if (!strncmp(tmp->name, "/SANDBOX/", 9)) filename += 9;
+ putname(tmp);
+ }
+
error = vfs_stat(filename, &stat);
if (error)
return error;
***************
*** 177,182 ****
--- 205,221 ----
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ struct filename *tmp = getname(filename);
+ if (IS_ERR(tmp)) return -EINVAL;
+ if (cher_patch_is_secure_path(tmp->name) < 0) {
+ putname(tmp);
+ return -EPERM;
+ }
+ if (!strncmp(tmp->name, "/SANDBOX/", 9)) filename += 9;
+ putname(tmp);
+ }
+
error = vfs_lstat(filename, &stat);
if (error)
return error;
***************
*** 191,196 ****
--- 230,238 ----
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
error = vfs_fstatat(dfd, filename, &stat, flag);
if (error)
return error;
***************
*** 250,256 ****
COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
! int error = user_statfs(pathname, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
--- 292,303 ----
COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
! int error;
!
! if (SBOX_IS_RESTRICTED())
! return -EPERM;
!
! error = user_statfs(pathname, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
***************
*** 259,265 ****
COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
! int error = fd_statfs(fd, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
--- 306,317 ----
COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
! int error;
!
! if (SBOX_IS_RESTRICTED())
! return -EPERM;
!
! error = fd_statfs(fd, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
***************
*** 303,308 ****
--- 355,363 ----
struct kstatfs tmp;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (sz != sizeof(*buf))
return -EINVAL;
***************
*** 317,322 ****
--- 372,380 ----
struct kstatfs tmp;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (sz != sizeof(*buf))
return -EINVAL;
***************
*** 335,341 ****
{
struct compat_ustat tmp;
struct kstatfs sbuf;
! int err = vfs_ustat(new_decode_dev(dev), &sbuf);
if (err)
return err;
--- 393,404 ----
{
struct compat_ustat tmp;
struct kstatfs sbuf;
! int err;
!
! if (SBOX_IS_RESTRICTED())
! return -EPERM;
!
! err = vfs_ustat(new_decode_dev(dev), &sbuf);
if (err)
return err;
***************
*** 422,427 ****
--- 485,493 ----
long ret;
unsigned int conv_cmd;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
switch (cmd) {
case F_GETLK:
case F_SETLK:
***************
*** 506,511 ****
--- 572,580 ----
long ret;
aio_context_t ctx64;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
mm_segment_t oldfs = get_fs();
if (unlikely(get_user(ctx64, ctx32p)))
return -EFAULT;
***************
*** 529,534 ****
--- 598,606 ----
struct timespec t;
struct timespec __user *ut = NULL;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (timeout) {
if (compat_get_timespec(&t, timeout))
return -EFAULT;
***************
*** 639,644 ****
--- 711,719 ----
struct iocb __user * __user *iocb64;
long ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (unlikely(nr < 0))
return -EINVAL;
***************
*** 796,801 ****
--- 871,881 ----
char *kernel_dev;
int retval;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
kernel_type = copy_mount_string(type);
retval = PTR_ERR(kernel_type);
if (IS_ERR(kernel_type))
***************
*** 1098,1103 ****
--- 1178,1187 ----
*/
COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode)
{
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
return do_sys_open(dfd, filename, flags, mode);
}
***************
*** 1476,1481 ****
--- 1560,1570 ----
COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd,
struct file_handle __user *, handle, int, flags)
{
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
return do_handle_open(mountdirfd, handle, flags);
}
#endif
diff -crb linux-4.4.4-unpatched/fs/compat_ioctl.c linux-4.4.4-patched/fs/compat_ioctl.c
*** linux-4.4.4-unpatched/fs/compat_ioctl.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/compat_ioctl.c 2016-03-05 19:08:33.682858687 +0300
***************
*** 1550,1555 ****
--- 1550,1560 ----
if (!f.file)
goto out;
+ if (SBOX_IS_RESTRICTED() && cmd != FIOCLEX && cmd != FIONCLEX) {
+ error = -EPERM;
+ goto out_fput;
+ }
+
/* RED-PEN how should LSM module know it's handling 32bit? */
error = security_file_ioctl(f.file, cmd, arg);
if (error)
diff -crb linux-4.4.4-unpatched/fs/dcache.c linux-4.4.4-patched/fs/dcache.c
*** linux-4.4.4-unpatched/fs/dcache.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/dcache.c 2016-03-05 19:08:33.683858687 +0300
***************
*** 3248,3255 ****
{
int error;
struct path pwd, root;
! char *page = __getname();
if (!page)
return -ENOMEM;
--- 3248,3261 ----
{
int error;
struct path pwd, root;
! char *page = 0;
+ if (SBOX_IS_RESTRICTED()) {
+ copy_to_user(buf, "/SANDBOX", 9);
+ return 9;
+ }
+
+ page = __getname();
if (!page)
return -ENOMEM;
diff -crb linux-4.4.4-unpatched/fs/dcookies.c linux-4.4.4-patched/fs/dcookies.c
*** linux-4.4.4-unpatched/fs/dcookies.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/dcookies.c 2016-03-05 19:08:33.737858685 +0300
***************
*** 155,160 ****
--- 155,165 ----
size_t pathlen;
struct dcookie_struct * dcs;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
/* we could leak path information to users
* without dir read permission without this
*/
diff -crb linux-4.4.4-unpatched/fs/eventfd.c linux-4.4.4-patched/fs/eventfd.c
*** linux-4.4.4-unpatched/fs/eventfd.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/eventfd.c 2016-03-05 19:08:33.737858685 +0300
***************
*** 422,427 ****
--- 422,430 ----
int fd, error;
struct file *file;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
error = get_unused_fd_flags(flags & EFD_SHARED_FCNTL_FLAGS);
if (error < 0)
return error;
diff -crb linux-4.4.4-unpatched/fs/eventpoll.c linux-4.4.4-patched/fs/eventpoll.c
*** linux-4.4.4-unpatched/fs/eventpoll.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/eventpoll.c 2016-03-05 19:08:34.399858666 +0300
***************
*** 1767,1772 ****
--- 1767,1775 ----
struct eventpoll *ep = NULL;
struct file *file;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
/* Check the EPOLL_* constant for consistency. */
BUILD_BUG_ON(EPOLL_CLOEXEC != O_CLOEXEC);
***************
*** 1828,1833 ****
--- 1831,1839 ----
struct epoll_event epds;
struct eventpoll *tep = NULL;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
error = -EFAULT;
if (ep_op_has_event(op) &&
copy_from_user(&epds, event, sizeof(struct epoll_event)))
***************
*** 1965,1970 ****
--- 1971,1979 ----
struct fd f;
struct eventpoll *ep;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
/* The maximum number of event must be greater than zero */
if (maxevents <= 0 || maxevents > EP_MAX_EVENTS)
return -EINVAL;
***************
*** 2011,2016 ****
--- 2020,2028 ----
int error;
sigset_t ksigmask, sigsaved;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
/*
* If the caller wants a certain signal mask to be set during the wait,
* we apply it here.
diff -crb linux-4.4.4-unpatched/fs/exec.c linux-4.4.4-patched/fs/exec.c
*** linux-4.4.4-unpatched/fs/exec.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/exec.c 2016-03-05 19:08:34.399858666 +0300
***************
*** 127,132 ****
--- 127,137 ----
if (IS_ERR(tmp))
goto out;
+ if (SBOX_IS_RESTRICTED()) {
+ putname(tmp);
+ return -EPERM;
+ }
+
file = do_filp_open(AT_FDCWD, tmp, &uselib_flags);
putname(tmp);
error = PTR_ERR(file);
***************
*** 1492,1497 ****
--- 1497,1511 ----
struct files_struct *displaced;
int retval;
+ if (SBOX_IS_RESTRICTED() && fd != AT_FDCWD) {
+ retval = -EPERM;
+ goto out_ret;
+ }
+ if ((current->sbox_flags & SBOX_NO_EXEC)) {
+ SBOX_SET_SECURITY_ERR();
+ goto out_ret;
+ }
+
if (IS_ERR(filename))
return PTR_ERR(filename);
***************
*** 1601,1606 ****
--- 1615,1623 ----
putname(filename);
if (displaced)
put_files_struct(displaced);
+ if ((current->sbox_flags & SBOX_NO_SYSCALLS)) {
+ current->sbox_flags |= SBOX_NO_EXEC;
+ }
return retval;
out:
diff -crb linux-4.4.4-unpatched/fs/fcntl.c linux-4.4.4-patched/fs/fcntl.c
*** linux-4.4.4-unpatched/fs/fcntl.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/fcntl.c 2016-03-05 19:08:34.399858666 +0300
***************
*** 361,366 ****
--- 361,371 ----
if (!f.file)
goto out;
+ if (SBOX_IS_RESTRICTED() && !check_fcntl_cmd(cmd)) {
+ err = -EPERM;
+ goto out1;
+ }
+
if (unlikely(f.file->f_mode & FMODE_PATH)) {
if (!check_fcntl_cmd(cmd))
goto out1;
***************
*** 386,391 ****
--- 391,401 ----
if (!f.file)
goto out;
+ if (SBOX_IS_RESTRICTED() && !check_fcntl_cmd(cmd)) {
+ err = -EPERM;
+ goto out1;
+ }
+
if (unlikely(f.file->f_mode & FMODE_PATH)) {
if (!check_fcntl_cmd(cmd))
goto out1;
diff -crb linux-4.4.4-unpatched/fs/fhandle.c linux-4.4.4-patched/fs/fhandle.c
*** linux-4.4.4-unpatched/fs/fhandle.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/fhandle.c 2016-03-05 19:08:35.247858641 +0300
***************
*** 97,102 ****
--- 97,107 ----
int lookup_flags;
int err;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if ((flag & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
***************
*** 258,263 ****
--- 263,273 ----
{
long ret;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (force_o_largefile())
flags |= O_LARGEFILE;
diff -crb linux-4.4.4-unpatched/fs/filesystems.c linux-4.4.4-patched/fs/filesystems.c
*** linux-4.4.4-unpatched/fs/filesystems.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/filesystems.c 2016-03-05 19:08:35.247858641 +0300
***************
*** 185,190 ****
--- 185,195 ----
{
int retval = -EINVAL;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
switch (option) {
case 1:
retval = fs_index((const char __user *) arg1);
diff -crb linux-4.4.4-unpatched/fs/ioctl.c linux-4.4.4-patched/fs/ioctl.c
*** linux-4.4.4-unpatched/fs/ioctl.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/ioctl.c 2016-03-05 19:08:35.264858640 +0300
***************
*** 617,622 ****
--- 617,628 ----
if (!f.file)
return -EBADF;
+
+ if (SBOX_IS_RESTRICTED() && cmd != FIOCLEX && cmd != FIONCLEX) {
+ fdput(f);
+ return -EPERM;
+ }
+
error = security_file_ioctl(f.file, cmd, arg);
if (!error)
error = do_vfs_ioctl(f.file, fd, cmd, arg);
diff -crb linux-4.4.4-unpatched/fs/locks.c linux-4.4.4-patched/fs/locks.c
*** linux-4.4.4-unpatched/fs/locks.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/locks.c 2016-03-05 19:08:35.525858633 +0300
***************
*** 1932,1937 ****
--- 1932,1942 ----
if (!f.file)
goto out;
+ if (SBOX_IS_RESTRICTED()) {
+ fdput(f);
+ return -EPERM;
+ }
+
can_sleep = !(cmd & LOCK_NB);
cmd &= ~LOCK_NB;
unlock = (cmd == LOCK_UN);
diff -crb linux-4.4.4-unpatched/fs/namei.c linux-4.4.4-patched/fs/namei.c
*** linux-4.4.4-unpatched/fs/namei.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/namei.c 2016-03-05 19:08:36.242858611 +0300
***************
*** 3549,3554 ****
--- 3549,3559 ----
int error;
unsigned int lookup_flags = 0;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
error = may_mknod(mode);
if (error)
return error;
***************
*** 3621,3626 ****
--- 3626,3636 ----
int error;
unsigned int lookup_flags = LOOKUP_DIRECTORY;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
retry:
dentry = user_path_create(dfd, pathname, &path, lookup_flags);
if (IS_ERR(dentry))
***************
*** 3769,3774 ****
--- 3779,3787 ----
SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
return do_rmdir(AT_FDCWD, pathname);
}
***************
*** 3911,3916 ****
--- 3924,3933 ----
SYSCALL_DEFINE3(unlinkat, int, dfd, const char __user *, pathname, int, flag)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if ((flag & ~AT_REMOVEDIR) != 0)
return -EINVAL;
***************
*** 3922,3927 ****
--- 3939,3948 ----
SYSCALL_DEFINE1(unlink, const char __user *, pathname)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
return do_unlinkat(AT_FDCWD, pathname);
}
***************
*** 3955,3960 ****
--- 3976,3985 ----
struct path path;
unsigned int lookup_flags = 0;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
from = getname(oldname);
if (IS_ERR(from))
return PTR_ERR(from);
***************
*** 4073,4078 ****
--- 4098,4107 ----
int how = 0;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if ((flags & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
/*
***************
*** 4332,4337 ****
--- 4361,4370 ----
bool should_retry = false;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
return -EINVAL;
Только в linux-4.4.4-patched/fs: namei.c.orig
diff -crb linux-4.4.4-unpatched/fs/namespace.c linux-4.4.4-patched/fs/namespace.c
*** linux-4.4.4-unpatched/fs/namespace.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/namespace.c 2016-03-05 19:08:36.242858611 +0300
***************
*** 1599,1604 ****
--- 1599,1609 ----
int retval;
int lookup_flags = 0;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (flags & ~(MNT_FORCE | MNT_DETACH | MNT_EXPIRE | UMOUNT_NOFOLLOW))
return -EINVAL;
***************
*** 2898,2903 ****
--- 2903,2913 ----
char *kernel_dev;
unsigned long data_page;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
kernel_type = copy_mount_string(type);
ret = PTR_ERR(kernel_type);
if (IS_ERR(kernel_type))
***************
*** 2982,2987 ****
--- 2992,3002 ----
struct mountpoint *old_mp, *root_mp;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (!may_mount())
return -EPERM;
diff -crb linux-4.4.4-unpatched/fs/notify/fanotify/fanotify_user.c linux-4.4.4-patched/fs/notify/fanotify/fanotify_user.c
*** linux-4.4.4-unpatched/fs/notify/fanotify/fanotify_user.c 2016-03-04 02:10:04.000000000 +0300
--- linux-4.4.4-patched/fs/notify/fanotify/fanotify_user.c 2016-03-05 19:08:38.138858555 +0300
***************
*** 698,703 ****
--- 698,706 ----
struct user_struct *user;
struct fanotify_event_info *oevent;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
pr_debug("%s: flags=%d event_f_flags=%d\n",
__func__, flags, event_f_flags);