TOMOYO: Add rest of file operation restrictions.
LSM hooks for chmod()/chown()/chroot() are now ready.
This patch utilizes these hooks.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 5ae3a57..2d10f98 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -81,12 +81,20 @@
[TOMOYO_TYPE_TRUNCATE_ACL] = "truncate",
[TOMOYO_TYPE_SYMLINK_ACL] = "symlink",
[TOMOYO_TYPE_REWRITE_ACL] = "rewrite",
+ [TOMOYO_TYPE_IOCTL_ACL] = "ioctl",
+ [TOMOYO_TYPE_CHMOD_ACL] = "chmod",
+ [TOMOYO_TYPE_CHOWN_ACL] = "chown",
+ [TOMOYO_TYPE_CHGRP_ACL] = "chgrp",
+ [TOMOYO_TYPE_CHROOT_ACL] = "chroot",
+ [TOMOYO_TYPE_MOUNT_ACL] = "mount",
+ [TOMOYO_TYPE_UMOUNT_ACL] = "unmount",
};
/* Keyword array for double path operations. */
static const char *tomoyo_dp_keyword[TOMOYO_MAX_DOUBLE_PATH_OPERATION] = {
[TOMOYO_TYPE_LINK_ACL] = "link",
[TOMOYO_TYPE_RENAME_ACL] = "rename",
+ [TOMOYO_TYPE_PIVOT_ROOT_ACL] = "pivot_root",
};
/**
@@ -655,7 +663,7 @@
domain,
const struct tomoyo_path_info *
filename,
- const u16 perm,
+ const u32 perm,
const bool may_use_pattern)
{
struct tomoyo_acl_info *ptr;
@@ -668,8 +676,13 @@
continue;
acl = container_of(ptr, struct tomoyo_single_path_acl_record,
head);
- if (!(acl->perm & perm))
- continue;
+ if (perm <= 0xFFFF) {
+ if (!(acl->perm & perm))
+ continue;
+ } else {
+ if (!(acl->perm_high & (perm >> 16)))
+ continue;
+ }
if (may_use_pattern || !acl->filename->is_patterned) {
if (!tomoyo_path_matches_pattern(filename,
acl->filename))
@@ -697,7 +710,7 @@
const struct tomoyo_path_info *filename,
const u8 operation)
{
- u16 perm = 0;
+ u32 perm = 0;
if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
return 0;
@@ -830,13 +843,13 @@
struct tomoyo_domain_info *
const domain, const bool is_delete)
{
- static const u16 rw_mask =
+ static const u32 rw_mask =
(1 << TOMOYO_TYPE_READ_ACL) | (1 << TOMOYO_TYPE_WRITE_ACL);
const struct tomoyo_path_info *saved_filename;
struct tomoyo_acl_info *ptr;
struct tomoyo_single_path_acl_record *acl;
int error = -ENOMEM;
- const u16 perm = 1 << type;
+ const u32 perm = 1 << type;
if (!domain)
return -EINVAL;
@@ -858,7 +871,10 @@
/* Special case. Clear all bits if marked as deleted. */
if (ptr->type & TOMOYO_ACL_DELETED)
acl->perm = 0;
- acl->perm |= perm;
+ if (perm <= 0xFFFF)
+ acl->perm |= perm;
+ else
+ acl->perm_high |= (perm >> 16);
if ((acl->perm & rw_mask) == rw_mask)
acl->perm |= 1 << TOMOYO_TYPE_READ_WRITE_ACL;
else if (acl->perm & (1 << TOMOYO_TYPE_READ_WRITE_ACL))
@@ -871,7 +887,10 @@
acl = tomoyo_alloc_acl_element(TOMOYO_TYPE_SINGLE_PATH_ACL);
if (!acl)
goto out;
- acl->perm = perm;
+ if (perm <= 0xFFFF)
+ acl->perm = perm;
+ else
+ acl->perm_high = (perm >> 16);
if (perm == (1 << TOMOYO_TYPE_READ_WRITE_ACL))
acl->perm |= rw_mask;
acl->filename = saved_filename;
@@ -887,12 +906,15 @@
head);
if (acl->filename != saved_filename)
continue;
- acl->perm &= ~perm;
+ if (perm <= 0xFFFF)
+ acl->perm &= ~perm;
+ else
+ acl->perm_high &= ~(perm >> 16);
if ((acl->perm & rw_mask) != rw_mask)
acl->perm &= ~(1 << TOMOYO_TYPE_READ_WRITE_ACL);
else if (!(acl->perm & (1 << TOMOYO_TYPE_READ_WRITE_ACL)))
acl->perm &= ~rw_mask;
- if (!acl->perm)
+ if (!acl->perm && !acl->perm_high)
ptr->type |= TOMOYO_ACL_DELETED;
error = 0;
break;
@@ -1193,7 +1215,7 @@
}
/**
- * tomoyo_check_1path_perm - Check permission for "create", "unlink", "mkdir", "rmdir", "mkfifo", "mksock", "mkblock", "mkchar", "truncate" and "symlink".
+ * tomoyo_check_1path_perm - Check permission for "create", "unlink", "mkdir", "rmdir", "mkfifo", "mksock", "mkblock", "mkchar", "truncate", "symlink", "ioctl", "chmod", "chown", "chgrp", "chroot", "mount" and "unmount".
*
* @domain: Pointer to "struct tomoyo_domain_info".
* @operation: Type of operation.
@@ -1217,6 +1239,7 @@
switch (operation) {
case TOMOYO_TYPE_MKDIR_ACL:
case TOMOYO_TYPE_RMDIR_ACL:
+ case TOMOYO_TYPE_CHROOT_ACL:
if (!buf->is_dir) {
/*
* tomoyo_get_path() reserves space for appending "/."
@@ -1270,7 +1293,7 @@
}
/**
- * tomoyo_check_2path_perm - Check permission for "rename" and "link".
+ * tomoyo_check_2path_perm - Check permission for "rename", "link" and "pivot_root".
*
* @domain: Pointer to "struct tomoyo_domain_info".
* @operation: Type of operation.