diff options
Diffstat (limited to 'security/tomoyo')
| -rw-r--r-- | security/tomoyo/mount.c | 124 |
1 files changed, 33 insertions, 91 deletions
diff --git a/security/tomoyo/mount.c b/security/tomoyo/mount.c index 54015b9964dc..7872226f72ee 100644 --- a/security/tomoyo/mount.c +++ b/security/tomoyo/mount.c @@ -73,7 +73,7 @@ static bool tomoyo_check_mount_acl(const struct tomoyo_request_info *r, } /** - * tomoyo_mount_acl2 - Check permission for mount() operation. + * tomoyo_mount_acl - Check permission for mount() operation. * * @r: Pointer to "struct tomoyo_request_info". * @dev_name: Name of device file. @@ -85,8 +85,8 @@ static bool tomoyo_check_mount_acl(const struct tomoyo_request_info *r, * * Caller holds tomoyo_read_lock(). */ -static int tomoyo_mount_acl2(struct tomoyo_request_info *r, char *dev_name, - struct path *dir, char *type, unsigned long flags) +static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, + struct path *dir, char *type, unsigned long flags) { struct path path; struct file_system_type *fstype = NULL; @@ -179,94 +179,6 @@ static int tomoyo_mount_acl2(struct tomoyo_request_info *r, char *dev_name, } /** - * tomoyo_mount_acl - Check permission for mount() operation. - * - * @r: Pointer to "struct tomoyo_request_info". - * @dev_name: Name of device file. - * @dir: Pointer to "struct path". - * @type: Name of filesystem type. - * @flags: Mount options. - * - * Returns 0 on success, negative value otherwise. - * - * Caller holds tomoyo_read_lock(). - */ -static int tomoyo_mount_acl(struct tomoyo_request_info *r, char *dev_name, - struct path *dir, char *type, unsigned long flags) -{ - int error; - error = -EPERM; - if ((flags & MS_MGC_MSK) == MS_MGC_VAL) - flags &= ~MS_MGC_MSK; - switch (flags & (MS_REMOUNT | MS_MOVE | MS_BIND)) { - case MS_REMOUNT: - case MS_MOVE: - case MS_BIND: - case 0: - break; - default: - printk(KERN_WARNING "ERROR: " - "%s%s%sare given for single mount operation.\n", - flags & MS_REMOUNT ? "'remount' " : "", - flags & MS_MOVE ? "'move' " : "", - flags & MS_BIND ? "'bind' " : ""); - return -EINVAL; - } - switch (flags & (MS_UNBINDABLE | MS_PRIVATE | MS_SLAVE | MS_SHARED)) { - case MS_UNBINDABLE: - case MS_PRIVATE: - case MS_SLAVE: - case MS_SHARED: - case 0: - break; - default: - printk(KERN_WARNING "ERROR: " - "%s%s%s%sare given for single mount operation.\n", - flags & MS_UNBINDABLE ? "'unbindable' " : "", - flags & MS_PRIVATE ? "'private' " : "", - flags & MS_SLAVE ? "'slave' " : "", - flags & MS_SHARED ? "'shared' " : ""); - return -EINVAL; - } - if (flags & MS_REMOUNT) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_REMOUNT_KEYWORD, - flags & ~MS_REMOUNT); - else if (flags & MS_MOVE) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_MOVE_KEYWORD, - flags & ~MS_MOVE); - else if (flags & MS_BIND) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_BIND_KEYWORD, - flags & ~MS_BIND); - else if (flags & MS_UNBINDABLE) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD, - flags & ~MS_UNBINDABLE); - else if (flags & MS_PRIVATE) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD, - flags & ~MS_PRIVATE); - else if (flags & MS_SLAVE) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD, - flags & ~MS_SLAVE); - else if (flags & MS_SHARED) - error = tomoyo_mount_acl(r, dev_name, dir, - TOMOYO_MOUNT_MAKE_SHARED_KEYWORD, - flags & ~MS_SHARED); - else - do { - error = tomoyo_mount_acl2(r, dev_name, dir, type, - flags); - } while (error == TOMOYO_RETRY_REQUEST); - if (r->mode != TOMOYO_CONFIG_ENFORCING) - error = 0; - return error; -} - -/** * tomoyo_mount_permission - Check permission for mount() operation. * * @dev_name: Name of device file. @@ -287,6 +199,36 @@ int tomoyo_mount_permission(char *dev_name, struct path *path, char *type, if (tomoyo_init_request_info(&r, NULL, TOMOYO_MAC_FILE_MOUNT) == TOMOYO_CONFIG_DISABLED) return 0; + if ((flags & MS_MGC_MSK) == MS_MGC_VAL) + flags &= ~MS_MGC_MSK; + if (flags & MS_REMOUNT) { + type = TOMOYO_MOUNT_REMOUNT_KEYWORD; + flags &= ~MS_REMOUNT; + } + if (flags & MS_MOVE) { + type = TOMOYO_MOUNT_MOVE_KEYWORD; + flags &= ~MS_MOVE; + } + if (flags & MS_BIND) { + type = TOMOYO_MOUNT_BIND_KEYWORD; + flags &= ~MS_BIND; + } + if (flags & MS_UNBINDABLE) { + type = TOMOYO_MOUNT_MAKE_UNBINDABLE_KEYWORD; + flags &= ~MS_UNBINDABLE; + } + if (flags & MS_PRIVATE) { + type = TOMOYO_MOUNT_MAKE_PRIVATE_KEYWORD; + flags &= ~MS_PRIVATE; + } + if (flags & MS_SLAVE) { + type = TOMOYO_MOUNT_MAKE_SLAVE_KEYWORD; + flags &= ~MS_SLAVE; + } + if (flags & MS_SHARED) { + type = TOMOYO_MOUNT_MAKE_SHARED_KEYWORD; + flags &= ~MS_SHARED; + } if (!type) type = "<NULL>"; idx = tomoyo_read_lock(); |