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path: root/security/tomoyo/common.c
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2011-07-11TOMOYO: Allow using argv[]/envp[] of execve() as conditions.Tetsuo Handa
This patch adds support for permission checks using argv[]/envp[] of execve() request. Hooks are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using executable's realpath and symlink's target as conditions.Tetsuo Handa
This patch adds support for permission checks using executable file's realpath upon execve() and symlink's target upon symlink(). Hooks are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using owner/group etc. of file objects as conditions.Tetsuo Handa
This patch adds support for permission checks using file object's DAC attributes (e.g. owner/group) when checking file's pathnames. Hooks for passing file object's pointers are in the last patch of this pathset. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-11TOMOYO: Allow using UID/GID etc. of current thread as conditions.Tetsuo Handa
This patch adds support for permission checks using current thread's UID/GID etc. in addition to pathnames. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-07-08TOMOYO: Remove /sys/kernel/security/tomoyo/.domain_status interface.Tetsuo Handa
/sys/kernel/security/tomoyo/.domain_status can be easily emulated using /sys/kernel/security/tomoyo/domain_policy . We can remove this interface by updating /usr/sbin/tomoyo-setprofile utility. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Make several options configurable.Tetsuo Handa
To be able to start using enforcing mode from the early stage of boot sequence, this patch adds support for activating access control without calling external policy loader program. This will be useful for systems where operations which can lead to the hijacking of the boot sequence are needed before loading the policy. For example, you can activate immediately after loading the fixed part of policy which will allow only operations needed for mounting a partition which contains the variant part of policy and verifying (e.g. running GPG check) and loading the variant part of policy. Since you can start using enforcing mode from the beginning, you can reduce the possibility of hijacking the boot sequence. This patch makes several variables configurable on build time. This patch also adds TOMOYO_loader= and TOMOYO_trigger= kernel command line option to boot the same kernel in two different init systems (BSD-style init and systemd). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add built-in policy support.Tetsuo Handa
To be able to start using enforcing mode from the early stage of boot sequence, this patch adds support for built-in policy configuration (and next patch adds support for activating access control without calling external policy loader program). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Rename meminfo to stat and show more statistics.Tetsuo Handa
Show statistics such as last policy update time and last policy violation time in addition to memory usage. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 4.Tetsuo Handa
Gather string constants to one file in order to make the object size smaller. Use unsigned type where appropriate. read()/write() returns ssize_t. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Fix lockdep warning.Tetsuo Handa
Currently TOMOYO holds SRCU lock upon open() and releases it upon close() because list elements stored in the "struct tomoyo_io_buffer" instances are accessed until close() is called. However, such SRCU usage causes lockdep to complain about leaving the kernel with SRCU lock held. This patch solves the warning by holding/releasing SRCU upon each read()/write(). This patch is doing something similar to calling kfree() without calling synchronize_srcu(), by selectively deferring kfree() by keeping track of the "struct tomoyo_io_buffer" instances. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add policy namespace support.Tetsuo Handa
Mauras Olivier reported that it is difficult to use TOMOYO in LXC environments, for TOMOYO cannot distinguish between environments outside the container and environments inside the container since LXC environments are created using pivot_root(). To address this problem, this patch introduces policy namespace. Each policy namespace has its own set of domain policy, exception policy and profiles, which are all independent of other namespaces. This independency allows users to develop policy without worrying interference among namespaces. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add ACL group support.Tetsuo Handa
ACL group allows administrator to globally grant not only "file read" permission but also other permissions. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Add auditing interface.Tetsuo Handa
Add /sys/kernel/security/tomoyo/audit interface. This interface generates audit logs in the form of domain policy so that /usr/sbin/tomoyo-auditd can reuse audit logs for appending to /sys/kernel/security/tomoyo/domain_policy interface. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Simplify profile structure.Tetsuo Handa
Remove global preference from profile structure in order to make code simpler. Due to this structure change, printk() warnings upon policy violation are temporarily disabled. They will be replaced by /sys/kernel/security/tomoyo/audit by next patch. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Rename directives.Tetsuo Handa
Convert "allow_..." style directives to "file ..." style directives. By converting to the latter style, we can pack policy like "file read/write/execute /path/to/file". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Use struct for passing ACL line.Tetsuo Handa
Use structure for passing ACL line, in preparation for supporting policy namespace and conditional parameters. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 3.Tetsuo Handa
Use common structure for ACL with "struct list_head" + "atomic_t". Use array/struct where possible. Remove is_group from "struct tomoyo_name_union"/"struct tomoyo_number_union". Pass "struct file"->private_data rather than "struct file". Update some of comments. Bring tomoyo_same_acl_head() from common.h to domain.c . Bring tomoyo_invalid()/tomoyo_valid() from common.h to util.c . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 2.Tetsuo Handa
Update (or temporarily remove) comments. Remove or replace some of #define lines. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-06-29TOMOYO: Cleanup part 1.Tetsuo Handa
In order to synchronize with TOMOYO 1.8's syntax, (1) Remove special handling for allow_read/write permission. (2) Replace deny_rewrite/allow_rewrite permission with allow_append permission. (3) Remove file_pattern keyword. (4) Remove allow_read permission from exception policy. (5) Allow creating domains in enforcing mode without calling supervisor. (6) Add permission check for opening directory for reading. (7) Add permission check for stat() operation. (8) Make "cat < /sys/kernel/security/tomoyo/self_domain" behave as if "cat /sys/kernel/security/tomoyo/self_domain". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-04-19TOMOYO: Fix infinite loop bug when reading /sys/kernel/security/tomoyo/auditTetsuo Handa
In tomoyo_flush(), head->r.w[0] holds pointer to string data to be printed. But head->r.w[0] was updated only when the string data was partially printed (because head->r.w[0] will be updated by head->r.w[1] later if completely printed). However, regarding /sys/kernel/security/tomoyo/query , an additional '\0' is printed after the string data was completely printed. But if free space for read buffer became 0 before printing the additional '\0', tomoyo_flush() was returning without updating head->r.w[0]. As a result, tomoyo_flush() forever reprints already printed string data. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2011-04-19TOMOYO: Fix race on updating profile's comment line.Tetsuo Handa
In tomoyo_write_profile() since 2.6.34, a lock was by error missing when replacing profile's comment line. If multiple threads attempted echo '0-COMMENT=comment' > /sys/kernel/security/tomoyo/profile in parallel, garbage collector will fail to kfree() the old value. Protect the replacement using a lock. Also, keep the old value rather than replace with empty string when out of memory error has occurred. Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21TOMOYO: Print URL information before panic().Tetsuo Handa
Configuration files for TOMOYO 2.3 are not compatible with TOMOYO 2.2. But current panic() message is too unfriendly and is confusing users. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: James Morris <jmorris@namei.org>
2010-10-21tomoyo: cleanup. don't store bogus pointerDan Carpenter
If domain is NULL then &domain->list is a bogus address. Let's leave head->r.domain NULL instead of saving an unusable pointer. This is just a cleanup. The current code always checks head->r.eof before dereferencing head->r.domain. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
2010-09-27TOMOYO: Don't abuse sys_getpid(), sys_getppid()Ben Hutchings
System call entry functions sys_*() are never to be called from general kernel code. The fact that they aren't declared in header files should have been a clue. These functions also don't exist on Alpha since it has sys_getxpid() instead. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Update version to 2.3.0Tetsuo Handa
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Add missing poll() hook.Tetsuo Handa
Commit 1dae08c "TOMOYO: Add interactive enforcing mode." forgot to register poll() hook. As a result, /usr/sbin/tomoyo-queryd was doing busy loop. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Rename symbols.Tetsuo Handa
Use shorter name in order to make it easier to fit 80 columns limit. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Small cleanup.Tetsuo Handa
Split tomoyo_write_profile() into several functions. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Copy directly to userspace buffer.Tetsuo Handa
When userspace program reads policy from /sys/kernel/security/tomoyo/ interface, TOMOYO uses line buffered mode. A line has at least one word. Commit 006dacc "TOMOYO: Support longer pathname." changed a word's max length from 4000 bytes to max kmalloc()able bytes. By that commit, a line's max length changed from 8192 bytes to more than max kmalloc()able bytes. Max number of words in a line remains finite. This patch changes the way of buffering so that all words in a line are firstly directly copied to userspace buffer as much as possible and are secondly queued for next read request. Words queued are guaranteed to be valid until /sys/kernel/security/tomoyo/ interface is close()d. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use common code for policy reading.Tetsuo Handa
tomoyo_print_..._acl() are similar. Merge them. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Allow reading only execute permission.Tetsuo Handa
Policy editor needs to know allow_execute entries in order to build domain transition tree. Reading all entries is slow. Thus, allow reading only allow_execute entries. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Change list iterator.Tetsuo Handa
Change list_for_each_cookie to (1) start from current position rather than next position (2) remove temporary cursor (3) check that srcu_read_lock() is held Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use common code for domain transition control.Tetsuo Handa
Use common code for "initialize_domain"/"no_initialize_domain"/"keep_domain"/ "no_keep_domain" keywords. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Remove alias keyword.Tetsuo Handa
Some programs behave differently depending on argv[0] passed to execve(). TOMOYO has "alias" keyword in order to allow administrators to define different domains if requested pathname passed to execve() is a symlink. But "alias" keyword is incomplete because this keyword assumes that requested pathname and argv[0] are identical. Thus, remove "alias" keyword (by this patch) and add syntax for checking argv[0] (by future patches). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Merge path_group and number_group.Tetsuo Handa
Use common code for "path_group" and "number_group". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Aggregate reader functions.Tetsuo Handa
Now lists are accessible via array index. Aggregate reader functions using index. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use array of "struct list_head".Tetsuo Handa
Assign list id and make the lists as array of "struct list_head". Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Make read function to void.Tetsuo Handa
Read functions do not fail. Make them from int to void. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Remove wrapper function for reading keyword.Tetsuo Handa
Keyword strings are read-only. We can directly access them to reduce code size. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Rename symbols.Tetsuo Handa
Use shorter name in order to make it easier to fix 80 columns limit. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use callback for updating entries.Tetsuo Handa
Use common code for elements using "struct list_head" + "bool" structure. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use common structure for list element.Tetsuo Handa
Use common "struct list_head" + "bool" structure. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Use callback for updating entries.Tetsuo Handa
Use common "struct list_head" + "bool" + "u8" structure and use common code for elements using that structure. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Update profile structure.Tetsuo Handa
This patch allows users to change access control mode for per-operation basis. This feature comes from non LSM version of TOMOYO which is designed for permitting users to use SELinux and TOMOYO at the same time. SELinux does not care filename in a directory whereas TOMOYO does. Change of filename can change how the file is used. For example, renaming index.txt to .htaccess will change how the file is used. Thus, letting SELinux to enforce read()/write()/mmap() etc. restriction and letting TOMOYO to enforce rename() restriction is an example usage of this feature. What is unfortunate for me is that currently LSM does not allow users to use SELinux and LSM version of TOMOYO at the same time... Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Add pathname aggregation support.Tetsuo Handa
This patch allows users to aggregate programs which provide similar functionality (e.g. /usr/bin/vi and /usr/bin/emacs ). Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Allow wildcard for execute permission.Tetsuo Handa
Some applications create and execute programs dynamically. We need to accept wildcard for execute permission because such programs contain random suffix in their filenames. This patch loosens up regulation of string parameters. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Several fixes for TOMOYO's management programs.Tetsuo Handa
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Split files into some pieces.Tetsuo Handa
security/tomoyo/common.c became too large to read. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Add interactive enforcing mode.Tetsuo Handa
Since the behavior of the system is restricted by policy, we may need to update policy when you update packages. We need to update policy in the following cases. * The pathname of files has changed. * The dependency of files has changed. * The access permissions required has increased. The ideal way to update policy is to rebuild from the scratch using learning mode. But it is not desirable to change from enforcing mode to other mode if the system has once entered in production state. Suppose MAC could support per-application enforcing mode, the MAC becomes useless if an application that is not running in enforcing mode was cracked. For example, the whole system becomes vulnerable if only HTTP server application is running in learning mode to rebuild policy for the application. So, in TOMOYO Linux, updating policy is done while the system is running in enforcing mode. This patch implements "interactive enforcing mode" which allows administrators to judge whether to accept policy violation in enforcing mode or not. A demo movie is available at http://www.youtube.com/watch?v=b9q1Jo25LPA . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
2010-08-02TOMOYO: Add mount restriction.Tetsuo Handa
mount(2) has three string and one numeric parameters. Split mount restriction code from security/tomoyo/file.c . Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
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