RSBAC Changes
-------------
1.4.9:
 - Port to 3.12 and 3.14.
 - debug_adf_rc|jail: only log, if rsbac_log_levels[request][target] != LL_none
 - new JAIL flag JAIL_allow_netdev_mod_system, MODIFY_SYSTEM_DATA on NETDEV
 - Do not check SEND_SIGNAL to a process that is already exiting.
 - JAIL: DO_NOT_CARE about SIGCHLD signal to process outside jail
 - Add kernel parameter rsbac_list_noread to avoid reading lists from disk.
 - Make sys_rsbac_rc_set_item() work in softmode, if current role is undefined

1.4.8:
	- Remove PM module
	- Add UDF module
	- Various small fixes

1.4.7:
	- Port to kernel 3.10.1
	- Add optional MOVETO request with kernel config option:
	  used when moving into a dir instead of old WRITE on DIR target.

1.4.6:
	- Port everything to kernel 3.1.5
	- Show process name and parent when logging PROCESS target accesses
	- Add RSBAC syscalls to get and set UM password history size per
	  user.
	- Do not allow to set attributes for FD targets with
	  sys_rsbac_set_attr()

1.4.5:
	- Fix symlink's stat() call to return the real symlink size
	  Fixes program that would assert on stat->s_size being the same size as when using readlink()
	- Remove use of task_capability_lock.
	- Fixes FS object hidding for most cases (still experimental)
	- Backport fixes and internal features from 1.5:
		- Add generic list option to use a separate kmem cache / slab per list.
		- Use that option for several lists, general ACI, RC, ACL, UM.
		- rkmem.h: define RSBAC_MAX_KMALLOC KMALLOC_MAX_SIZE
		- Do not create our kmem caches with SLAB_DESTROY_BY_RCU, not needed.
		- Big cleanup of DAZ code.
		- Make DAZ path subselection by scanners optional, default is on in 1.4.
		- Change DAZ module filename allocation to fixed size slabs.
		- Remove rsbac_get_full_path_length(), which is not used anywhere any more.
		- Use fixed DAZ filename size PATH_MAX, defined in include/linux/limits.h.
		- DAZ: allocate memory with _unlocked functions where possible.
		- Put device items into own slabs.
		- Fix memory leak in case of failed list rehashing.
	- Fix notification for setuid() etc: move after commit_creds().
	- In Unix send and receive, use remote peercred.pid, if local is not available.
	- Fix NULL pointer deref, if sk_socket is unset.
	- Move SEND and RECEIVE for Unix sockets from net/socket.c to net/unix/af_inet.c.
	- This makes interception code cleaner and more reliable, specially for named
	  sockets.
	- Fix file_p handling in list read functions.
	- Use mntget() instead of path_get() in rsbac_read_open().

1.4.4:
	- Port to 2.6.33.2
	- Fix RC check for CREATE right on new objects.
	- Backport rsbac_read_open() and rsbac_read_close() fixes from 1.5.

1.4.3:
	- Depend CONFIG_RSBAC_RC_LEARN on CONFIG_RSBAC_DEBUG.
	- Show transaction number in learning info messages.
	- Add transaction names for human use and set names for learn transactions.
	- Move CREATE checks in rc_main.c into common function rc_check_create() with lea
	- Fix proc function return types in reg samples.
	- Remove rsbac_read_lock(), rsbac_write_lock() etc.
	- Remove rsbac_vmalloc, rsbac_vkmalloc, rsbac_vfree, rsbac_vkfree.
	- New kernel config RSBAC_SWITCH_BOOT_OFF: 'Allow to switch modules off with kernel parameter'
	- Join ta_committing and ta_forgetting to ta_committing.
	- Fix three small memory leaks.
	- Show program path in CAP learning messages and use INFO level, not DEBUG.
	- Allow SCD mlock in PM.
	- Show program path in AUTH learning messages.
	- When committing or forgetting, lock per list and make other list functions sleep while committing or forgetting.
	- Optionally put learning mode results into transactions, one per module.
	- Add global RC learning mode for role rights to types.
	- Control CAP learning mode switch in CAP module.
	- Implement CAP learning mode for user and program max_caps.
	- Move AUTH auth_program_file kernel-only attribute to GEN program_file.
	- Fix lockup in rehashing, after failing of new hashed struct memory allocation, forgot to spin_unlock. Alloc unlocked instead, better anyway.
	- Add notes for locking to generic lists.
	- Store compare results in variable to avoid doing same compare twice.
	- Only reset curr pointer, if same as removed item (usually the case).
	- Show rcu_batches_completed() in proc gen_list_counts.
	- Store nr_hashes in variable, if used after unlocking - might change.
	- Fix *remove_count(): calling rcu_free on wrong updated pointer, so store.
	- Do not use count values for checks, can be wrong. Always use head.
	- Allow rcu rate >= 1 for testing purposes, config help still says 100.
	- Reorder syscall case struct by frequency of calls (stats from real systems).
	- Ifdef syscalls for disabled modules instead of returning error in them.
	- Make RCU rate limit boot and runtime configurable.

1.4.2:
	- Change generic lists to use RCU instead of rw spinlocks
	- Show a total of reads and writes in list statistics in gen_lists_count
	- Disable rsbac attributes store on fuse
	- Fix RC dev inheritance: Explicitely set minor to 0 before getting major attr
	- Use Pseudo also for RC ADF debug messages
	- Use RCU callbacks with a rate limit of 1000/s, use sync, if exceeded, configurable in kernel config

1.4.1:
	- Support ANY value 255 for NETLINK protocol
	- Return -EPERM in sys_rsbac_um_check_account, if user does not exist.
	- Add config option RSBAC_ENFORCE_CLOSE to really deny close, if decided.
	- Check CLOSE requests in RC.
	- Add SCD target videomem and kernel attribute pagenr.
	- Split SCD kmem into kmem and videomem, split hooks in drivers/char/mem.c.
	- Allow R_MODIFY_SYSTEM_DATA notifications on SCD in adf_check.c.
	- ext4 secure delete support
1.4.0:
	- Added VUM (Virtual User Management) support	
	- OTP support for UM
	- Converted the common code to 2.6 only. From now on changes will be 2.6 only as well.
1.3.5:
	- Check crypto return codes (2.6) and fixed UM password hashing.
	- Fix compilation issues for "disable writing to disk". See bug #98.
	- Safety mesures for inheritence in case of null pointers.
	- Disable debug message "rsbac_get_parent(): oops - d_parent == dentry_p".
	- Increase string lengths in user and group items significantly.
	- Add RSBAC memory slab 384 for new user item sizes.
	- Do not try to write lists, if device is not writable.
	- Do not sleep in rsbac_get_vfsmount(), can be called while atomic.
	- Do not write attributes on Oracle Cluster FS 2 (OCFS2).
	- Complete hook review.
1.3.4:
	- No changes :)
1.3.3:
	- Change FD cache counters to 64 Bit to avoid wrapping.
	- Make FD Cache xstats output look nicer.
	- Make an adf_request permission check when modyfing capabilities is the new set >> old one.
	- Copy auth_last_auth on CLONE, gets reset on EXECUTE.
	- Provide pid and process name in some UM debug output.
	- 2.6 WARNING: sysrq key 'w' is GONE! no more wake up trigger possible
1.3.2:
	- mark FS_OBJ_HIDE as EXPERIMENTAL and depends on it
	- clean compilation warnings, data types and such.
	- removed double "ready" message in rsbac_do_init()
	- disable partner process check for unix socks by default.
	- Show fd cache hits/misses ratio in xstats. Really inline rsbac_is_initialized().
	- Change fd cache descriptor to get rid of separate compare function in 2.4 kernels.
	- Add FD inherited attribute value cache. Hash device list. Allow per-list max_ite
ms_per_hash.
	- Change return code in AUTH syscalls to INVALIDATTR, if group or eff/fs support i
s not compiled in.
	- port from ex 1.4 trunk: do not intercept PTRACE_DETACH request
	- rewrite of error handling to be more logical in rsbac_handle_filldir().
	- Also take partner pid from other on Unix socket stream connects.
	- Accept syscalls from tools with all versions 1.3.x.
	- Take partner process on UNIXSOCK CONNECT from other->sk_peercred.
	- Try to get partner process for UNIXSOCK RECEIVE from other sources, if peercred is not filled.
	- New error code INVALIDLIST, if list handle is invalid.
	- New jail flags for syslog jail. 
	- Extra check before reiserfs secure_delete call.
	- Fix Dazuko device registration in 2.6. Return INVALIDPOINTER for invalid pointer
s in some syscalls.
	- lvm/md automount fix
	- Fix oops on loop umounts: device was auto-mounted, if there were dirty lists. Ne
ver auto-mount loop devices.
	- 
1.3.1:
	- Add xstats counter for get_parent calls.
	- Fix sort order of network templates.
	- Add missing DAZ request in vector. Add role number in RC syscall denied log message.
	- Create bitmasks for each module of which requests it is interested in and only call request_xy and set_attr_xy, if necessary.
	- small performance tunning: removed usage of rsbac_list_compare_u32 (always use memcmp which is asm-tuned per arch)
	- Reduce stack usage in list, ACL and RC init.
	- Optimize list hash functions with bit masks instead of % operation.
	- make sure that rsbac_list_max_hashes and rsbac_list_lol_max_hashes are always potential of 2 and warn the user at configuration time. (127 will round to 64).

1.3.0:
	- Restarted 1.3 tree from the 1.2.7 release
	- System call rsbac_version to return numeric version without checking the caller’s version provided to syscall.
	- JAIL: allow_parent_ipc to allow IPC into parent jail. Useful with Apache mod_jail and others. Needs another process attribute jail_parent
	- JAIL: add a flag to allow suid/sgid files and dirs.
	- Optionally check CHANGE_OWNER for PROCESS targets also as CHANGE_OWNER on the new USER. This allows fine grained control also in RC and ACL models.
	- Change network templates to hold up to 25 ip networks and up to 10 port ranges.
	- Automatic online resizing of per-list hash table. As list identifiers are pointers to list headers, which must not change, the arrays of list heads are allocated separately and accessed through a pointer.
	- Change named UNIX sockets to be new filesystem target type T_UNIXSOCK and unnamed to be new IPC type anonunix (like pipes)
	- RC role def_unixsock_create_type, which overrides the def_(ind_)fd_create_type. Default value use_def_fd.
	- Change aci, acl and auth devices lists to use RCU on 2.6 kernels
	- Dazuko udev support
	- UM password history with configurable length to avoid password reuse.
	- Update HTML doc in Documentation/rsbac, or point all docs to the website.
	- Hide dir entries a process has no SEARCH right for
	- Limit number of items per single list to 50000, so real limit is at 50000 * nr_hashes.
	- New request type AUTHENTICATE against USER targets. No authentication against RSBAC UM without this right in RC and ACL.
	- Complete hook review with several small fixes.
	- More detailed JAIL decision logging for IPC and UNIXSOCK targets with rsbac_debug_adf_jail.

1.2.7:
	- Use new PaX flags location at current->mm->pax_flags.
	- Removed remaining non-RSBAC code
1.2.6:
	- DAZ Renaming of files from non-scanned to scanned directory
	  now works correctly (does not cache results from non scanned
	  as CLEAN - and/but keep INFECTED status if set when moving file
	  from scanned to non-scanned)
	- DAZ unscanned files decision is now DO_NOT_CARE instead of
	  GRANTED
	- Full pathes returned by RSBAC do not display double
	  (or more) / with double (or more) mounts anymore.
	  ex: /home//bob => /home/bob
	  This allows DAZ path based scanning to function normally.
	- Fix setting of RC IPC type with def_ipc_create_type.
	- Added ptrace hook for m32r architecture.
	- New kthread notification code.
	- Fix xstats to include GROUP targets.
	- Mark lists dirty again, if saving failed.
	- Fix FF to allow file READ (but not READ_OPEN) even with execute_only.
	- Stop making SEND and RECEIVE requests for STREAM sockets, if
	  CONFIG_RSBAC_NET_OBJ_RW is not set.
	- Notify that shm is destroyed only when it really is (thanks rtp).
	- Minor compile fixes

1.2.5: - AUTH config switch to globally allow setuid to user (real, eff, fs),
         who started the program. Boot time option and proc setting to enable
         per uid type.
       - Show missing Linux caps in JAIL like in CAP.
       - Change device attribute backup to use a list of attribute objects
         instead of traversing /dev and possibly missing some.
       - Device attribute inheritance: Use values at type:major as default for
         type:major:minor.
       - Add a generic request directly in sys_ioctl with new request type
         IOCTL on DEV and NETOBJ target.
       - Finish ioctl extra interception with GET_STATUS_DATA and
         MODIFY_SYSTEM_DATA, e.g. for SCSI.
       - Store remote IP when process accepted its first INET connection as
         process attribute and pass on to children. Log remote IP in request
         log.
       - Symlink redirection based on remote IP.
       - Optional UM password limits: Min length, non-alpha char required
       - Fix EINVALIDPOINTER when changing UM password with passwd via
         pam_rsbac.
       - Complete system call interception review with additional hooks where
         necessary. See Interceptions log for details.
       - Change USER attribute backup to list of known items.
       - Fix dereference bug related to rsbac_get_parent: set_attr call in
         do_exec sometimes used file struct after freeing.
       - Fix 2.6.11 random file not found errors, caused by symlink redirection
         and ext2/ext3 kernel fs layer violation.
       - Add CREATE and DELETE notifications in um syscalls.
       - Make RC apply default_{user|group}_create_type on {USER|GROUP} CREATE.
       - Configure module switching per module. Only allow switching stateful
         models on after switching off with extra kernel config switch.
       - Review all devision modules, whether they decide on all relevant
         request to target combinations and whether they protect all relevant
         attributes.
       - Full review of all interceptions to make them locks safe
       - Fix initrd problems showing up with the Adamantix kernel

1.2.4: - Per dir FD type RC default_fd_create_type
       - Full kernel space user management as a replacement for /etc/passwd,
         /etc/shadow, /etc/group
       - Add GROUP target type
       - Change RC copy_role to be allowed with role in admin_roles
       - Log full program path, get dentry from mappings for this
       - Make RSBAC remote logging target configurable at boot or runtime.
         Suppress remote logging, if address or port is 0.
       - audit_uid: Default value "unset". Set at CHANGE_OWNER away from a uid
         != 0, kept, inherited to child processes and logged. Allows to log
         actions of users who did an su etc. Configurable additional uid per
         program which works like uid 0, e.g. for SSHD privilege separation
         (new attr auid_exempt).
       - AUTH protection for Linux group IDs.
       - New kernel flag: rsbac_softmode_once: Sets softmode, but denies
         setting it again during runtime. For those systems that for some
         reason must start in softmode, disable it and do not want to have it
         set again later.
       - New kernel flag: rsbac_softmode_never: Disallows setting softmode
         during this runtime.
       - Keep last UM authenticated users in a per-process attribute
         auth_last_auth. Allow processes with auth_may_set_cap flag to set
         last_auth.
       - New kernel flag: rsbac_freeze: Disallows all modifying administration
         in RSBAC syscalls. Added new switch target FREEZE.
       - Make PaX default flags configurable.
       - RC check access to UNIX socket partner process
       - Transaction support for administration: begin, add a set of desired
         changes, commit atomically or forget.
       - Add RC copy_type, to be allowed with ADMIN right.
       - User Management "exclusive mode": Only users and groups known to
         RSBAC UM can be reached. Kernel parameter and /proc setting to
         temporarily disable the restrictions.
       - Randomize UM password salt better
       - Optionally randomize transaction numbers
       - Reduce memory consumption of rsbac_do_init.
       - Further reduce RSBAC's stack usage to prepare for 4 KB kernel stack
         size.
       - Password protection for transaction operations refresh, forget, commit
       - Add hooks with MODIFY_SYSTEM_DATA on SCD network to queueing
         administration
       - Warn explicitely, if CAP max_caps do not get applied because of
         running in softmode.
       - Update Dazuko interface to 2.0.5
       - Update defconfig in all archs 
       - ACLs for Users and Linux groups
       - Extend AUTH auth_may_setuid flag with values last_auth_only and
         last_auth_and_gid to allow last authenticated uid to be reached.
         The second allows all group ids, too, because you cannot auth for
         them. No longer add process cap at UM authentication, but rather
         check at CHANGE_OWNER with last_auth process attribute.
       - Fix severe Oopses when forgetting transactions with lists of lists.
       - Optionally log all denied calls to capable() function with
         CONFIG_RSBAC_CAP_LOG_MISSING 

1.2.3: - Port to linux kernel 2.6.0-test with LSM
       - New JAIL flag allow_clock for ntpd encapsulation
       - Removed LSM support (see http://rsbac.org/documentation/why_rsbac_does_not_use_lsm).
       - Global AUTH learning mode
       - AUTH cap inheritance from parent dir (single step only, not
         accumulated)
       - RC pretty-print config output
       - Remove 2.2 kernel support.
       - Improve AUTH learning mode to use special value for same user
       - Trigger AUTH learning mode per program
       - Show type, name and mode of new object in T_DIR/CREATE request log. 
       - Statix PaX support decision module
       - Faked (root) user ID in ''getuid()'' to make stupid programs with uid
         checks happy.
       - Full log separation between syslog and RSBAC log, also for debug
         messages (except rsbac_debug_aef). RSBAC now really shuts up, if
         rsbac_nosyslog is set, and sends everything to RSBAC own log only.
       - ACL learning mode for user rights to filesystem objects, parameter
         rsbac_acl_learn
       - New RC syscall to get current role
       - mac_trusted_for_user with list instead of single user.
       - Block fchdir outside the jail, if some stupid program opened a dir,
         called rsbac_jail() and then called fchdir(). Done by simply closing
         all open dirs after rsbac_jail() called chroot.
       - Fixed some JAIL bugs found, all relevant chroot items from regression
         suite solved. Not urgent enough and too many changes to make a 1.2.2
         bugfix.
       - Added JAIL Linux Capability restriction
       - Dazuko integration as fixed module, as replacement for MS module
       - Dazuko result caching with generic lists (as in old MS module)
       - AUTH special value for eff and fs uid (thanks to Arnout Engelen)
       - New optional rsbac_jail parameter max_caps, which limits the Linux
         capabilities of all processes in the jail
       - Optionally hide process ids without GET_STATUS_DATA in /proc/
         dir listing
       - /proc/rsbac-info/active to get current version and list of active
         modules: One line each for version, mode: Secure/Softmode/Maintenance,
         softmode: available/unavailable and one line per module: on/softmode/off
       - Solve the new "kernel complains about vmalloc with lock" uglyness:
         removed all vmalloc use in 2.6 kernels, too many workarounds needed.
       - Protect sysfs objects in 2.6 kernels
       - Added three real life example REG modules to rsbac/adf/reg,
         contributed by Michal Purzynski
       - Changed DEV list descriptor to be compatible between 2.4 and 2.6
         kernels
       - Added RC types and compatibility settings for USER targets
       - Allow to set a different RC boot role than that of user root
       - Add RC process type for kernel threads

1.2.2: - Added ms_need_scan attribute for selective scanning
       - MS module support for F-Protd as scanning engine
       - ms_need_scan FD attribute for selective scanning
       - JAIL flag allow_inet_localhost to additionally allow to/from
         local/remote IP 127.0.0.1
       - RSBAC syscall version numbers
       - New RES module with minimum and maximum resource settings for
         users and programs
       - Moved AUTH module to generic lists with ttl
       - Added new requests CHANGE_DAC_(EFF|FS)_OWNER on PROCESS targets
         for seteuid and setfsuid (configurable)
       - Added caps and checks for effective and fs owner to AUTH module
         (optional)
       - Changed behaviour on setuid etc.: Notification is always sent, even
         if the uid was set to the same value. This allows for restricted RC
         initial roles with correct role after setuid to root.
       - New Process Hiding feature in CAP module
       - Delayed init for initial ramdisks: delay RSBAC init until the first
         real device mount.
       - rsbac_init() syscall to trigger init by hand, if not yet
         initialized - can be used with e.g. rsbac_delayed_root=99:99, which
         will never trigger init automatically.
       - MS module support for clamd as scanning engine.
       - Almost complete reimplementation of the MAC model with many new
         features.
       - New system role 'auditor' for most models, which may read and flush
         RSBAC own log.

1.2.1: - Added support for all other architectures.
       - Cleaned up rsbac syscall filesystem name lookup and target type
         checks.
       - New module JAIL: preconfigured process encapsulation (see kernel
         config help).

1.2.0: - Moved most lists to generic lists, splitting up between modules on
         the way (GEN = general for all modules).
       - DS for each module only included, if module is compiled in.
       - New Linux Capabilities (CAP) module
       - Split system_role into mac_role, fc_role, etc. Please do not use
         old A_system_role attribute any longer.
       - Changed rsbac_get/set_attr interface to include target module
       - Added module guessing from attribute into sys_rsbac_get/set_attr,
         if module is not given (value SW_NONE).
       - Added user and RC role based symlink redirection
       - Added network and firewall config protection as SCD network and
         firewall targets
       - Added NETDEV, NETTEMP and NETOBJ targets for network access control.
       - Added network templates for default NETOBJ attribute values
       - Renamed /rsbac dir to /rsbac.dat to avoid name conflicts.
       - RC model with unlimited roles and types
       - Selective dir tree disabling of Linux DAC
       - Generic list ordering (needed for templates and optimization)
       - List optimization
       - Generic time-to-live support in generic lists (new on-disk version)
       - Support time-to-live for ACL group members and ACL entries
       - copy_net_temp
       - Individual module soft mode
       - Support time-to-live for RC entries
       - Backport to 2.2.20

1.1.2: - Own RSBAC memory allocation functions. Own RSBAC mem slabs in 2.4
         kernels.
       - Generic lists - simply register your list item sizes with filename
         and persist flag, and a persistent list will be kept for you.
       - Generic lists of lists, two level version.
       - Moved pm_data_structures.c to new lists with proc backup files
         Attention: There is no auto-update from older versions possible!
       - proc backup files for RC and ACL are now optional
       - New proc subdir pm, replaces old write_list call
       - rsbac_pm write_list call removed
       - New FD aci version with new rc_initial_role and 16 bit ff_flags
       - New FF flag append_only, which limits all write accesses to
         APPEND_OPEN and WRITE
       - Fix for rename hole: rename could replace and thus delete an
         existing file without DELETE check. Also performs secure_delete, if
         necessary
       - New rsbac_mount hook in change_root for initial ramdisk
       - Fixed missing Linux check in bad_signal
       - Added optional switch rsbac_dac_disable to disable Linux filesystem
         access control
       - Added count support for multiple mounts
       - Added optional switch rsbac_nosyslog to temporarily disable logging
         to syslog
       - Added config option for DEBUG code

1.1.1: - New target type FIFO, with a lot of cleanup, e.g. IPC type fifo
         removed
       - MAC module reworked, including MAC-Light option
       - Several bugfixes
       - Port to 2.4.0, 2.4.1 and 2.4.2
       - New Makefiles with lists for 2.4 and without for 2.2 kernels
         (Thanks to Edward Brocklesby for samples)
       - init process default ACI now partly depends on root's ACI
       - Optional interception of sys_read and sys_write.
         Attention: you might have to add READ and WRITE rights to files,
         fifos, dirs and sockets first, if upgrading from an older version
       - REG overhaul. Now you can register syscall functions, everything is
         kept in unlimited lists instead of arrays and registering is
         versioned to allow for binary module shipping with REG version
         checks.
       - Inheritance is now fixed, except for MAC model
       - MAC: optional inheritance, new option Smart Inheritance that tries
         to avoid new attribute objects (see config help)
       - New soft mode option: all decisions and logging are performed, but
         DO_NOT_CARE is returned to enforcement. Off by default. See config
         help for details.
       - Optional initialization in extra rsbac_initd thread.

1.1.0: - Port to 2.4.0-test11
       - Interception of sys_mmap and sys_mprotect added. Now execution of
         library code requires EXECUTE privilege on the library file, and
         setting non-mmapped memory to EXEC mode requires EXECUTE on target
         NONE.
       - MAC Light option by Stanislav Ievlev added. See kernel config help or
         modules.htm.

1.0.9c:
       - Port to 2.4.0-test{[789]|10}, this means major changes to the lookup and
         inheritance code - of course #ifdef'd
       - Change string declarations to kmalloc. On the way moved
         MAX_PATH_LEN restriction from 1999 to max_kmalloc - 256
         (>127K).
       - Renamed several PM xy.class to xy.object_class for C++
         compatibility
       - Added SCD type ST_kmem
       - Changed rc_force_role default to rc_role_inherit_parent,
         terminated at root dir with old default rc_role_inherit_mixed.
         This makes it much easier to keep a dir of force-roled binaries.
1.0.9b:
       - Port to 2.3.42 - 2.3.99-pre3
       - Port to 2.2.14 - 2.2.16
       - 32 Bit Uid/Gid with new attribute versions
       - User and program based logging
       - AUTH capability ranges
       - Made write to MSDOS fs a config option, so use it on your own risk
         (see config help)
       - MAC levels 0-252
       - Added config option for ioport access (X support)
      
1.0.9a:
       - Added group management to ACL module.
       - Removed CONFIG_RSBAC_SYNC option.
       - Added module hints to logging
       - Added RC separation of duty (see models.htm)
       - Added RC force role inherit_up_mixed and made it default setting

1.0.9: - Added registration of additional decision modules (REG)
       - Wrote decision module examples (see README-reg and reg_samples dir)
       - Port to 2.2.8, 2.2.9, 2.2.10, 2.2.11, 2.2.12 (pre versions)
       - Heavily changed RC model: Now it has a distinguished role-to-type
         compatibility setting for each request type, instead of one setting
         for all request types. This allows for much finer grained access
         control.
         Unfortunately there was no way to update existing role settings,
         so those have to be reentered by hand. Still, the types entries are
         kept.
       - Set all MSDOS based file systems to read-only, because inode
         numbers are likely to change between boots.
       - Added Access Control List module. ACLs are kept on FILE, DIR,
         DEV, IPC, SCD and PROCESS targets (IPC and PROCESS have only
         one default ACL each). Each entry contains subject type (user,
         rc_role, group), subject id and the rights this subject has. Also,
         rights are inherited from parents and from a target specific default
         ACL.
         See html/models.htm for details.
       - Added optional full path logging.

1.0.8a:
       - Port to 2.2.7
       - File Flag no_execute added to prevent execution, e.g. of user
         binaries under /home tree. Can be circumvented by scripts via
         'interpreter scriptname'.

1.0.8: - Port to 2.2.1
       - Added /proc/rsbac-info/backup to provide an easier means of backup
         for not device dependent stuff. To be extended.
       - Added new Role Compatibility (RC) module.
       - New on-disk binary layout, auto update from all versioned data
         (1.0.5 upwards).
       - AUTH module added to support proper authentification by enforcing
         externally granted CHANGE_OWNER capabilities.
       - Save to disk inconsistency in PM sets fixed.
       - MAC categories added, but limited to a fixed number of 64. Apart
         from that, the MAC module categories are as proposed in the
         Bell-LaPadula model.
       - Port to 2.2.2
       - Port to 2.2.3 with minor changes
       - Port to 2.2.4
       - Port to 2.2.5

1.0.7a:
       - Added alpha support (with Shaun Savage). Has different storage sizes,
         so default useraci does not work and you need a maint kernel.
       - Added new error detection features for file/dir entries.
       - Increasing of NR_FD_LISTS is now handled differently for error
         detection reasons. See README-nrlists.
       - Marked init functions as __init - though saving a few KB doesn't
         make such a big difference while using RSBAC... ;)
       - Fixed memory leaks in write_*_list while introducing vmalloc for
         large lists. The number of file/dir lists is now only a matter of
         performance and available memory.
       - Added two flags to File Flags
       - Port to 2.2.0-pre6
       - Added secure deletion/truncation, needs a config switch to be
         enabled. If on, all files marked with (inheritable) FF-flag
         secure_delete and all files marked as PM-personal data are zeroed on
         deletion and truncation - if the regarding modules are switched on.

1.0.7: - Port to 2.1.131
       - Added more fs types to non-writable: smbfs, ncpfs, codafs - so
         there should be no writing on network mounts (unfortunately there
         is no afs SUPER_MAGIC)
       - Added configuration option NO_DECISION_ON_NETMOUNTS, which
         additionally turns off all decisions for all these fs, so that
         they are completely ignored
       - Added attribute inheritance: Some attributes for files and dirs
         have a special value 'inherit'. If this is set, the value of the
         parent dir's attribute is used instead. This mechanism ends on
         fs boundaries - each fs root dir gets old style standard values,
         if attribute is set to 'inherit'.
         Currently security_level, object_category and data_type are
         inheritable.
       - Added configuration option DEF_INHERIT. If set, default values for
         inheritable attributes are *inherit, rather than the old default.
         This option setting should not differ between different RSBAC
         kernels to avoid deeper confusion for administrators and
         rsbac_check().
       - To support inheritance, added parameter inherit to both get_attr
         system calls. If on, the effective (possibly inherited) value is
         returned, if off, the real value is returned.
       - Corrected a security hole in receiving from / sending via datagram
         sockets (thanks to Simone). Now a read/append open and a close
         request are done for every datagram (if net support is configured,
         as usual).
         Attention: Programs that open an UDP socket as one user (e.g. root)
                    and then setuid to another (e.g. bin) may not be able
                    to access that socket, if the new user has insufficent
                    rights! (see config help)
         Checking of net access can as before be turned on/off via
         CONFIG_RSBAC_NET.
       - Worked on rsbac_check(). Is more stable now, but should only be
         called under maximum of moderate load.

1.0.6: - Moved to 2.1.128
       - Cleaned up old includes in syscalls.c
       - Added RSBAC own logging in /proc/rsbac-info/rmsg, to be accessed
         by modified klogd or sys_rsbac_log, restricted by most modules to
         security officers.
         Additionally, logging to standard syslog can be turned off to hide
         security relevant log from all but those with explicit access.
       - Added module File Flags with attribute ff_flags for FILE/DIR
         targets
       - Added auto-update of last version attributes (only FD changed
         though)
       - Changed ms_trusted from boolean to tristate: non-trusted, read,
         full
       - Fixed rm -r hang bug
       - Added consistency check for RSBAC items, which can remove items for
         deleted inodes (ext2 only) and entries containing only default
         values (FILE/DIR targets only). It also recalculates item counts.
       - Added sys_rsbac_check to trigger this check.

1.0.5:
       - Rewrote most of attribute saving to disk. Now disk writing is never
         done with a spinlock held, increasing stability significantly
         (is this a taboo? if yes, where is it documented?)
       - Changed write-to-disk behaviour: The old immediate write is no
         longer default, but optional (CONFIG_RSBAC_SYNC_WRITE). Instead,
         sys_rsbac_write can be used from user space or a kernel daemon can
         be activated to write changes automatically every n seconds
         (CONFIG_RSBAC_AUTO_WRITE)
       - Added kernel param rsbac_debug_auto for the daemon - gives a good
         overview of attribute change rate
       - Added proc interface for statistics and many RSBAC settings
       - Added rsbac_adf_request calls MODIFY_SYSTEM_DATA to sysctl.c
       - Wrote man pages for all RSBAC syscalls (in Documentation/rsbac/man)
       - Added version information and check for all file/dir/dev aci and
         for log_levels
       - Added some more scan strings to Malware Scan module, had to change
         string representation to a more general way

1.0.4:
       - Port via 2.1.115 and 2.1.124 to 2.1.125
       - IPC targets: changed ids for sockets from pid/fd combination to
         pointer to sock structure, including (many) changes in the
         handling.
       - Added socket level scanning (tcp and udp) to module Malware Scan.
         This feature can stop malware while still being transferred to
         your system. Added new attributes for IPC, process and file/dir
         targets to manage socket scan.
       - Reordered configuration options
       - Added CONFIG_RSBAC_NO_WRITE to totally disable writing to disk for
         testing purposes and kernel parameter rsbac_debug_no_write to
         temporarily disable disk writing 
       - Added CONFIG_RSBAC_*_ROLE_PROTection for all role dependant
         modules: Now change-owner (setuid etc.) can be restricted between
         users with special roles - see configuration help for details
       - Some more bugfixes, mostly to decision modules

1.0.4-pre2:
       - Port to 2.1.111
       - Attribute mac_trusted_for_user added to FILE aci. Value meanings:
         RSBAC_NO_USER (-3): program is not MAC-trusted
         RSBAC_ALL_USERS (-4): program is MAC-trusted for all users
         other user-ID: program is MAC-trusted, if invoked by this user
         Especially the last is useful for daemon programs that can be
         started by all users.
         Init process is checked, too, but is MAC-trusted by default.
       - Syscalls rsbac_mac_set/get_max_seclevel added. Now a process can
         reduce its own maximum security level. Useful for wrapper daemons
         like inetd after forking and before invoking another program.
       - Object dependent logging #ifdef'd with configuration option.
       - Configuration option 'Maintenance Kernel' added. Disables all other
         options.
       - removed CONFIG_RSBAC_ADMIN and rsbac_admin() stuff - now we have
         capabilities, and there is no suser() anymore to extend
       - changed locking for Data Structures component from semaphores to
         read/write spinlocks
       - added (U)MOUNT requests for target DEV to sys_(u)mount. Now both
         target dir and device are checked for access (MAC: dir: read-write,
         dev: depending on mount mode read or read-write). Note: After
         mount, all file/dir accesses on this device are checked as usual.
       - Moved checks for valid request/target combinations from MAC module
         to extra functions in rsbac/adf/check.c.

1.0.3: - Target DEV added. Now devices can get their own attributes based
         on major/minor numbers. Attributes based on their file representations
         in /dev are no longer used for open, but still for all other calls.
         MAC decisions on open requests for devices must be explicitely enabled
         by mac_check to keep system bootable.
         Short rule: Only if contents is accessed, DEV attributes apply.
       - Attribute object_type removed, was not used anyway and maintained in
         linux structures.
       - Attributes log_array_low and log_array_high for FILE/DIR/DEV added,
         providing individial request based logging for those objects.
       - PM module: if DEV is personal_data, neccessary access is checked
         for new class DEV (can be changed to custom class)
       - A couple of minor bugfixes done

1.0.2A: - Port to 2.0.34
        - A few #ifdef CONFIG_RSBAC_USE_RSBAC_OWNER were missing, causing
          error messages "rsbac_set/get_attr returned error" -> added


13/Jun/2001
Amon Ott <ao@rsbac.org>
