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linux-4.6.5-sbox.patch
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linux-4.6.5-sbox.patch
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diff -Naur linux-4.6.5/arch/x86/ia32/sys_ia32.c linux-4.6.5-sbox/arch/x86/ia32/sys_ia32.c
--- linux-4.6.5/arch/x86/ia32/sys_ia32.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/arch/x86/ia32/sys_ia32.c 2016-07-30 13:30:56.037600144 +0300
@@ -95,12 +95,26 @@
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 = vfs_stat(filename, &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;
@@ -110,7 +124,20 @@
struct stat64 __user *statbuf)
{
struct kstat stat;
- int ret = vfs_lstat(filename, &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;
@@ -131,6 +158,10 @@
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
error = vfs_fstatat(dfd, filename, &stat, flag);
if (error)
return error;
diff -Naur linux-4.6.5/arch/x86/kernel/ioport.c linux-4.6.5-sbox/arch/x86/kernel/ioport.c
--- linux-4.6.5/arch/x86/kernel/ioport.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/arch/x86/kernel/ioport.c 2016-07-30 13:30:56.037600144 +0300
@@ -26,6 +26,11 @@
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))
@@ -104,6 +109,11 @@
*/
unsigned int old = t->iopl >> X86_EFLAGS_IOPL_BIT;
+ if (SBOX_IS_RESTRICTED()) {
+ //SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (level > 3)
return -EINVAL;
/* Trying to gain more privileges? */
diff -Naur linux-4.6.5/arch/x86/kernel/ldt.c linux-4.6.5-sbox/arch/x86/kernel/ldt.c
--- linux-4.6.5/arch/x86/kernel/ldt.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/arch/x86/kernel/ldt.c 2016-07-30 13:30:56.037600144 +0300
@@ -276,6 +276,11 @@
{
int ret = -ENOSYS;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
switch (func) {
case 0:
ret = read_ldt(ptr, bytecount);
diff -Naur linux-4.6.5/arch/x86/kernel/vm86_32.c linux-4.6.5-sbox/arch/x86/kernel/vm86_32.c
--- linux-4.6.5/arch/x86/kernel/vm86_32.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/arch/x86/kernel/vm86_32.c 2016-07-30 13:47:57.849569953 +0300
@@ -207,6 +207,11 @@
SYSCALL_DEFINE2(vm86, unsigned long, cmd, unsigned long, arg)
{
+ if (SBOX_IS_RESTRICTED())
+ {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
switch (cmd) {
case VM86_REQUEST_IRQ:
case VM86_FREE_IRQ:
@@ -237,6 +242,12 @@
struct pt_regs *regs = current_pt_regs();
unsigned long err = 0;
+ if (SBOX_IS_RESTRICTED())
+ {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
err = security_mmap_addr(0);
if (err) {
/*
diff -Naur linux-4.6.5/fs/aio.c linux-4.6.5-sbox/fs/aio.c
--- linux-4.6.5/fs/aio.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/aio.c 2016-07-30 13:30:56.038600144 +0300
@@ -1319,6 +1319,9 @@
unsigned long ctx;
long ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
ret = get_user(ctx, ctxp);
if (unlikely(ret))
goto out;
@@ -1351,9 +1354,16 @@
*/
SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx)
{
- struct kioctx *ioctx = lookup_ioctx(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);
@@ -1637,6 +1647,9 @@
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);
}
@@ -1679,6 +1692,9 @@
u32 key;
int ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
ret = get_user(key, &iocb->aio_key);
if (unlikely(ret))
return -EFAULT;
@@ -1729,9 +1745,13 @@
struct io_event __user *, events,
struct timespec __user *, timeout)
{
- struct kioctx *ioctx = lookup_ioctx(ctx_id);
+ 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 -Naur linux-4.6.5/fs/buffer.c linux-4.6.5-sbox/fs/buffer.c
--- linux-4.6.5/fs/buffer.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/buffer.c 2016-07-30 13:30:56.039600144 +0300
@@ -3260,6 +3260,9 @@
{
static int msg_count;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
diff -Naur linux-4.6.5/fs/compat.c linux-4.6.5-sbox/fs/compat.c
--- linux-4.6.5/fs/compat.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/compat.c 2016-07-30 13:30:56.039600144 +0300
@@ -77,6 +77,11 @@
{
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))
@@ -91,6 +96,11 @@
{
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]))
@@ -106,6 +116,11 @@
{
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) ||
@@ -159,12 +174,25 @@
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;
@@ -177,6 +205,17 @@
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;
@@ -191,6 +230,9 @@
struct kstat stat;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
error = vfs_fstatat(dfd, filename, &stat, flag);
if (error)
return error;
@@ -250,7 +292,12 @@
COMPAT_SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
- int error = user_statfs(pathname, &tmp);
+ int error;
+
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
+ error = user_statfs(pathname, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
@@ -259,7 +306,12 @@
COMPAT_SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct compat_statfs __user *, buf)
{
struct kstatfs tmp;
- int error = fd_statfs(fd, &tmp);
+ int error;
+
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
+ error = fd_statfs(fd, &tmp);
if (!error)
error = put_compat_statfs(buf, &tmp);
return error;
@@ -303,6 +355,9 @@
struct kstatfs tmp;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (sz != sizeof(*buf))
return -EINVAL;
@@ -317,6 +372,9 @@
struct kstatfs tmp;
int error;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (sz != sizeof(*buf))
return -EINVAL;
@@ -335,7 +393,12 @@
{
struct compat_ustat tmp;
struct kstatfs sbuf;
- int err = vfs_ustat(new_decode_dev(dev), &sbuf);
+ int err;
+
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
+ err = vfs_ustat(new_decode_dev(dev), &sbuf);
if (err)
return err;
@@ -422,6 +485,9 @@
long ret;
unsigned int conv_cmd;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
switch (cmd) {
case F_GETLK:
case F_SETLK:
@@ -506,6 +572,9 @@
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;
@@ -529,6 +598,9 @@
struct timespec t;
struct timespec __user *ut = NULL;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (timeout) {
if (compat_get_timespec(&t, timeout))
return -EFAULT;
@@ -639,6 +711,9 @@
struct iocb __user * __user *iocb64;
long ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
if (unlikely(nr < 0))
return -EINVAL;
@@ -796,6 +871,11 @@
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))
@@ -1097,6 +1177,10 @@
*/
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);
}
@@ -1475,6 +1559,11 @@
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 -Naur linux-4.6.5/fs/compat_ioctl.c linux-4.6.5-sbox/fs/compat_ioctl.c
--- linux-4.6.5/fs/compat_ioctl.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/compat_ioctl.c 2016-07-30 13:30:56.039600144 +0300
@@ -1541,6 +1541,11 @@
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 -Naur linux-4.6.5/fs/dcache.c linux-4.6.5-sbox/fs/dcache.c
--- linux-4.6.5/fs/dcache.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/dcache.c 2016-07-30 13:30:56.040600144 +0300
@@ -3241,8 +3241,14 @@
{
int error;
struct path pwd, root;
- char *page = __getname();
+ char *page = 0;
+ if (SBOX_IS_RESTRICTED()) {
+ copy_to_user(buf, "/SANDBOX", 9);
+ return 9;
+ }
+
+ page = __getname();
if (!page)
return -ENOMEM;
diff -Naur linux-4.6.5/fs/dcookies.c linux-4.6.5-sbox/fs/dcookies.c
--- linux-4.6.5/fs/dcookies.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/dcookies.c 2016-07-30 13:30:56.040600144 +0300
@@ -155,6 +155,11 @@
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 -Naur linux-4.6.5/fs/eventfd.c linux-4.6.5-sbox/fs/eventfd.c
--- linux-4.6.5/fs/eventfd.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/eventfd.c 2016-07-30 13:30:56.040600144 +0300
@@ -460,6 +460,9 @@
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 -Naur linux-4.6.5/fs/eventpoll.c linux-4.6.5-sbox/fs/eventpoll.c
--- linux-4.6.5/fs/eventpoll.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/eventpoll.c 2016-07-30 13:30:56.041600144 +0300
@@ -1796,6 +1796,9 @@
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);
@@ -1857,6 +1860,9 @@
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)))
@@ -2009,6 +2015,9 @@
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;
@@ -2055,6 +2064,9 @@
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 -Naur linux-4.6.5/fs/exec.c linux-4.6.5-sbox/fs/exec.c
--- linux-4.6.5/fs/exec.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/exec.c 2016-07-30 13:30:56.041600144 +0300
@@ -128,6 +128,11 @@
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);
@@ -1588,6 +1593,15 @@
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);
@@ -1697,6 +1711,9 @@
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 -Naur linux-4.6.5/fs/fcntl.c linux-4.6.5-sbox/fs/fcntl.c
--- linux-4.6.5/fs/fcntl.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/fcntl.c 2016-07-30 13:30:56.042600144 +0300
@@ -362,6 +362,11 @@
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;
@@ -387,6 +392,11 @@
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 -Naur linux-4.6.5/fs/fhandle.c linux-4.6.5-sbox/fs/fhandle.c
--- linux-4.6.5/fs/fhandle.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/fhandle.c 2016-07-30 13:30:56.042600144 +0300
@@ -97,6 +97,11 @@
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;
@@ -258,6 +263,11 @@
{
long ret;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (force_o_largefile())
flags |= O_LARGEFILE;
diff -Naur linux-4.6.5/fs/filesystems.c linux-4.6.5-sbox/fs/filesystems.c
--- linux-4.6.5/fs/filesystems.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/filesystems.c 2016-07-30 13:30:56.042600144 +0300
@@ -185,6 +185,11 @@
{
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 -Naur linux-4.6.5/fs/ioctl.c linux-4.6.5-sbox/fs/ioctl.c
--- linux-4.6.5/fs/ioctl.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/ioctl.c 2016-07-30 13:30:56.042600144 +0300
@@ -684,6 +684,12 @@
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 -Naur linux-4.6.5/fs/locks.c linux-4.6.5-sbox/fs/locks.c
--- linux-4.6.5/fs/locks.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/locks.c 2016-07-30 13:30:56.043600144 +0300
@@ -1958,6 +1958,11 @@
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 -Naur linux-4.6.5/fs/namei.c linux-4.6.5-sbox/fs/namei.c
--- linux-4.6.5/fs/namei.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/namei.c 2016-07-30 13:30:56.043600144 +0300
@@ -3603,6 +3603,11 @@
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;
@@ -3675,6 +3680,11 @@
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))
@@ -3798,6 +3808,9 @@
SYSCALL_DEFINE1(rmdir, const char __user *, pathname)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
return do_rmdir(AT_FDCWD, pathname);
}
@@ -3940,6 +3953,10 @@
SYSCALL_DEFINE3(unlinkat, int, dfd, const char __user *, pathname, int, flag)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if ((flag & ~AT_REMOVEDIR) != 0)
return -EINVAL;
@@ -3951,6 +3968,10 @@
SYSCALL_DEFINE1(unlink, const char __user *, pathname)
{
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
return do_unlinkat(AT_FDCWD, pathname);
}
@@ -3984,6 +4005,10 @@
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);
@@ -4102,6 +4127,10 @@
int how = 0;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if ((flags & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
/*
@@ -4365,6 +4394,10 @@
bool should_retry = false;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ return -EPERM;
+ }
+
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
return -EINVAL;
diff -Naur linux-4.6.5/fs/namespace.c linux-4.6.5-sbox/fs/namespace.c
--- linux-4.6.5/fs/namespace.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/namespace.c 2016-07-30 13:30:56.044600144 +0300
@@ -1607,6 +1607,11 @@
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;
@@ -2909,6 +2914,11 @@
char *kernel_dev;
void *options;
+ 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))
@@ -2993,6 +3003,11 @@
struct mountpoint *old_mp, *root_mp;
int error;
+ if (SBOX_IS_RESTRICTED()) {
+ SBOX_SET_SECURITY_ERR();
+ return -EPERM;
+ }
+
if (!may_mount())
return -EPERM;
diff -Naur linux-4.6.5/fs/notify/fanotify/fanotify_user.c linux-4.6.5-sbox/fs/notify/fanotify/fanotify_user.c
--- linux-4.6.5/fs/notify/fanotify/fanotify_user.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/notify/fanotify/fanotify_user.c 2016-07-30 13:30:56.044600144 +0300
@@ -698,6 +698,9 @@
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);
@@ -812,6 +815,9 @@
struct path path;
int ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
pr_debug("%s: fanotify_fd=%d flags=%x dfd=%d pathname=%p mask=%llx\n",
__func__, fanotify_fd, flags, dfd, pathname, mask);
diff -Naur linux-4.6.5/fs/notify/inotify/inotify_user.c linux-4.6.5-sbox/fs/notify/inotify/inotify_user.c
--- linux-4.6.5/fs/notify/inotify/inotify_user.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/notify/inotify/inotify_user.c 2016-07-30 13:49:02.527568042 +0300
@@ -671,6 +671,9 @@
struct fsnotify_group *group;
int ret;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
/* Check the IN_* constants for consistency. */
BUILD_BUG_ON(IN_CLOEXEC != O_CLOEXEC);
BUILD_BUG_ON(IN_NONBLOCK != O_NONBLOCK);
@@ -699,6 +702,8 @@
SYSCALL_DEFINE3(inotify_add_watch, int, fd, const char __user *, pathname,
u32, mask)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
struct fsnotify_group *group;
struct inode *inode;
struct path path;
@@ -760,6 +765,9 @@
struct fd f;
int ret = 0;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
f = fdget(fd);
if (unlikely(!f.file))
return -EBADF;
diff -Naur linux-4.6.5/fs/open.c linux-4.6.5-sbox/fs/open.c
--- linux-4.6.5/fs/open.c 2016-07-27 18:42:34.000000000 +0300
+++ linux-4.6.5-sbox/fs/open.c 2016-07-30 13:30:56.045600144 +0300
@@ -34,6 +34,54 @@
#include "internal.h"
+static const char * const secure_paths[] =
+{
+ "/lib/", "/lib32/", "/lib64/",
+ "/usr/lib/", "/usr/lib32/", "/usr/lib64/",
+ "/usr/include/", "/usr/libexec/",
+ "/usr/local/lib/", "/usr/local/lib32/", "/usr/local/lib64/",
+ "/usr/local/include/", "/usr/local/libexec/",
+ "/bin/", "/usr/bin/", "/usr/local/bin/",
+ "/usr/share/", "/usr/local/share/", "/dev/urandom", "/dev/zero", "/dev/null",
+ "/SANDBOX/",
+ NULL
+};
+
+int cher_patch_is_secure_path(const char *path)
+{
+ const char *s;
+ int i;
+
+ if (strstr(path, ".."))
+ return -1;
+ for (i = 0; secure_paths[i] && strncmp(path, secure_paths[i], strlen(secure_paths[i])); ++i);
+ if (secure_paths[i]) {
+ return 0;
+ }
+
+ if (!strncmp(path, "/SANDBOX/", 9)) path += 9;
+ s = path;
+ while (s[0] == '.' && s[1] == '/') s += 2;
+ for (; *s && *s != '/'; s++);
+ if (*s == '/') return -1;
+ return 0;
+}
+
+int cher_check_user_path(int dfd, const char __user **p_path)
+{
+ struct filename *tmp = NULL;
+ if (dfd != AT_FDCWD) return -EPERM;
+ tmp = getname(*p_path);
+ if (IS_ERR(tmp)) return -EINVAL;
+ if (cher_patch_is_secure_path(tmp->name) < 0) {
+ putname(tmp);
+ return -EPERM;
+ }
+ if (!strncmp("/SANDBOX/", tmp->name, 9)) *p_path += 9;
+ putname(tmp);
+ return 0;
+}
+
int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
struct file *filp)
{
@@ -141,12 +189,18 @@
SYSCALL_DEFINE2(truncate, const char __user *, path, long, length)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
return do_sys_truncate(path, length);
}
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(truncate, const char __user *, path, compat_off_t, length)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
return do_sys_truncate(path, length);
}
#endif
@@ -214,11 +268,17 @@
#if BITS_PER_LONG == 32
SYSCALL_DEFINE2(truncate64, const char __user *, path, loff_t, length)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
return do_sys_truncate(path, length);
}
SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
{
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
return do_sys_ftruncate(fd, length, 0);
}
#endif /* BITS_PER_LONG == 32 */
@@ -319,9 +379,13 @@
SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
{
- struct fd f = fdget(fd);
+ struct fd f;
int error = -EBADF;
+ if (SBOX_IS_RESTRICTED())
+ return -EPERM;
+
+ f = fdget(fd);
if (f.file) {
error = vfs_fallocate(f.file, mode, offset, len);
fdput(f);
@@ -343,6 +407,11 @@
int res;
unsigned int lookup_flags = LOOKUP_FOLLOW;
+ if (SBOX_IS_RESTRICTED()) {
+ res = cher_check_user_path(dfd, &filename);
+ if (res < 0) return res;
+ }
+
if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
return -EINVAL;
@@ -420,6 +489,10 @@
struct path path;
int error;