Commit Graph

768 Commits

Author SHA1 Message Date
Christian S.J. Peron
24ffe72448 Add a case to make sure that internal audit records get converted
to BSM format for lpathconf(2) events.

MFC after:	2 weeks
2010-05-04 15:29:07 +00:00
Robert Watson
9663e34384 Update device-labeling logic for Biba, LOMAC, and MLS to recognize new-style
pts devices when various policy ptys_equal flags are enabled.

Submitted by:	Estella Mystagic <estella at mystagic.com>
MFC after:	1 week
2010-03-02 15:05:48 +00:00
Christian S.J. Peron
583450efd7 Make sure we convert audit records that were produced as the result of the
closefrom(2) syscall.
2010-01-31 22:31:01 +00:00
Brooks Davis
412f9500e2 Replace the static NGROUPS=NGROUPS_MAX+1=1024 with a dynamic
kern.ngroups+1.  kern.ngroups can range from NGROUPS_MAX=1023 to
INT_MAX-1.  Given that the Windows group limit is 1024, this range
should be sufficient for most applications.

MFC after:	1 month
2010-01-12 07:49:34 +00:00
Edward Tomasz Napierala
3a597bfc7b Make mac_lomac(4) able to interpret NFSv4 access bits.
Reviewed by:	rwatson
2010-01-03 17:19:14 +00:00
Poul-Henning Kamp
0d07b627a3 Having thrown the cat out of the house, add a necessary include. 2009-09-08 13:24:36 +00:00
Poul-Henning Kamp
6778431478 Revert previous commit and add myself to the list of people who should
know better than to commit with a cat in the area.
2009-09-08 13:19:05 +00:00
Poul-Henning Kamp
b34421bf9c Add necessary include. 2009-09-08 13:16:55 +00:00
Robert Watson
9eb3e4639a Correctly audit real gids following changes to the audit record argument
interface.

Approved by:	re (kib)
2009-08-12 10:45:45 +00:00
Robert Watson
791b0ad2bf Eliminate ARG_UPATH[12] arguments to AUDIT_ARG_UPATH() and instead
provide specific macros, AUDIT_ARG_UPATH1() and AUDIT_ARG_UPATH2()
to capture path information for audit records.  This allows us to
move the definitions of ARG_* out of the public audit header file,
as they are an implementation detail of our current kernel-internal
audit record, which may change.

Approved by:	re (kensmith)
Obtained from:	TrustedBSD Project
MFC after:	1 month
2009-07-29 07:44:43 +00:00
Robert Watson
b146fc1bf0 Rework vnode argument auditing to follow the same structure, in order
to avoid exposing ARG_ macros/flag values outside of the audit code in
order to name which one of two possible vnodes will be audited for a
system call.

Approved by:	re (kib)
Obtained from:	TrustedBSD Project
MFC after:	1 month
2009-07-28 21:52:24 +00:00
Robert Watson
e4b4bbb665 Audit file descriptors passed to fooat(2) system calls, which are used
instead of the root/current working directory as the starting point for
lookups.  Up to two such descriptors can be audited.  Add audit record
BSM encoding for fooat(2).

Note: due to an error in the OpenBSM 1.1p1 configuration file, a
further change is required to that file in order to fix openat(2)
auditing.

Approved by:	re (kib)
Reviewed by:	rdivacky (fooat(2) portions)
Obtained from:	TrustedBSD Project
MFC after:	1 month
2009-07-28 21:39:58 +00:00
Robert Watson
597df30e62 Import OpenBSM 1.1p1 from vendor branch to 8-CURRENT, populating
contrib/openbsm and a subset also imported into sys/security/audit.
This patch release addresses several minor issues:

- Fixes to AUT_SOCKUNIX token parsing.
- IPv6 support for au_to_me(3).
- Improved robustness in the parsing of audit_control, especially long
  flags/naflags strings and whitespace in all fields.
- Add missing conversion of a number of FreeBSD/Mac OS X errnos to/from BSM
  error number space.

MFC after:	3 weeks
Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
Approved by:	re (kib)
2009-07-17 14:02:20 +00:00
Robert Watson
6196f898bb Create audit records for AUE_POSIX_OPENPT, currently w/o arguments.
Approved by:	re (audit argument blanket)
2009-07-02 16:33:38 +00:00
Robert Watson
deedc899fd Fix comment misthink.
Submitted by:	b. f. <bf1783 at googlemail.com>
Approved by:	re (audit argument blanket)
MFC after:	1 week
2009-07-02 09:50:13 +00:00
Robert Watson
2a5658382a Clean up a number of aspects of token generation from audit arguments to
system calls:

- Centralize generation of argument tokens for VM addresses in a macro,
  ADDR_TOKEN(), and properly encode 64-bit addresses in 64-bit arguments.
- Fix up argument numbers across a large number of syscalls so that they
  match the numeric argument into the system call.
- Don't audit the address argument to ioctl(2) or ptrace(2), but do keep
  generating tokens for mmap(2), minherit(2), since they relate to passing
  object access across execve(2).

Approved by:	re (audit argument blanket)
Obtained from:	TrustedBSD Project
MFC after:	1 week
2009-07-02 09:15:30 +00:00
Robert Watson
03f7b00438 For access(2) and eaccess(2), audit the requested access mode.
Approved by:	re (audit argument blanket)
MFC after:	3 days
2009-07-01 22:47:45 +00:00
Robert Watson
9e4c1521d5 Define missing audit argument macro AUDIT_ARG_SOCKET(), and
capture the domain, type, and protocol arguments to socket(2)
and socketpair(2).

Approved by:	re (audit argument blanket)
MFC after:	3 days
2009-07-01 18:54:49 +00:00
Robert Watson
6d5a61563a When auditing unmount(2), capture FSID arguments as regular text strings
rather than as paths, which would lead to them being treated as relative
pathnames and hence confusingly converted into absolute pathnames.

Capture flags to unmount(2) via an argument token.

Approved by:	re (audit argument blanket)
MFC after:	3 days
2009-07-01 16:56:56 +00:00
Robert Watson
422d786676 Audit the file descriptor number passed to lseek(2).
Approved by:	re (kib)
MFC after:	3 days
2009-07-01 15:37:23 +00:00
Robert Watson
2ef24dde7c udit the 'options' argument to wait4(2).
Approved by:	re (kib)
MFC after:	3 days
2009-07-01 12:36:10 +00:00
Stacey Son
86120afae4 Dynamically allocate the gidset field in audit record.
This fixes a problem created by the recent change that allows a large
number of groups per user.  The gidset field in struct kaudit_record
is now dynamically allocated to the size needed rather than statically
(using NGROUPS).

Approved by:	re@ (kensmith, rwatson), gnn (mentor)
2009-06-29 20:19:19 +00:00
Robert Watson
14961ba789 Replace AUDIT_ARG() with variable argument macros with a set more more
specific macros for each audit argument type.  This makes it easier to
follow call-graphs, especially for automated analysis tools (such as
fxr).

In MFC, we should leave the existing AUDIT_ARG() macros as they may be
used by third-party kernel modules.

Suggested by:	brooks
Approved by:	re (kib)
Obtained from:	TrustedBSD Project
MFC after:	1 week
2009-06-27 13:58:44 +00:00
Konstantin Belousov
3364c323e6 Implement global and per-uid accounting of the anonymous memory. Add
rlimit RLIMIT_SWAP that limits the amount of swap that may be reserved
for the uid.

The accounting information (charge) is associated with either map entry,
or vm object backing the entry, assuming the object is the first one
in the shadow chain and entry does not require COW. Charge is moved
from entry to object on allocation of the object, e.g. during the mmap,
assuming the object is allocated, or on the first page fault on the
entry. It moves back to the entry on forks due to COW setup.

The per-entry granularity of accounting makes the charge process fair
for processes that change uid during lifetime, and decrements charge
for proper uid when region is unmapped.

The interface of vm_pager_allocate(9) is extended by adding struct ucred *,
that is used to charge appropriate uid when allocation if performed by
kernel, e.g. md(4).

Several syscalls, among them is fork(2), may now return ENOMEM when
global or per-uid limits are enforced.

In collaboration with:	pho
Reviewed by:	alc
Approved by:	re (kensmith)
2009-06-23 20:45:22 +00:00
Ed Schouten
fbbbf5d135 Chase the removal of PRIV_TTY_PRISON in the mac(9) modules.
Reported by:	kib
Pointy hat to:	me
2009-06-20 15:54:35 +00:00
Konstantin Belousov
d8b0556c6d Adapt vfs kqfilter to the shared vnode lock used by zfs write vop. Use
vnode interlock to protect the knote fields [1]. The locking assumes
that shared vnode lock is held, thus we get exclusive access to knote
either by exclusive vnode lock protection, or by shared vnode lock +
vnode interlock.

Do not use kl_locked() method to assert either lock ownership or the
fact that curthread does not own the lock. For shared locks, ownership
is not recorded, e.g. VOP_ISLOCKED can return LK_SHARED for the shared
lock not owned by curthread, causing false positives in kqueue subsystem
assertions about knlist lock.

Remove kl_locked method from knlist lock vector, and add two separate
assertion methods kl_assert_locked and kl_assert_unlocked, that are
supposed to use proper asserts. Change knlist_init accordingly.

Add convenience function knlist_init_mtx to reduce number of arguments
for typical knlist initialization.

Submitted by:	jhb [1]
Noted by:	jhb [2]
Reviewed by:	jhb
Tested by:	rnoland
2009-06-10 20:59:32 +00:00
Robert Watson
bcf11e8d00 Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC
and used in a large number of files, but also because an increasing number
of incorrect uses of MAC calls were sneaking in due to copy-and-paste of
MAC-aware code without the associated opt_mac.h include.

Discussed with:	pjd
2009-06-05 14:55:22 +00:00
Robert Watson
3ad3d9c5ef Add one further check with mac_policy_count to an mbuf copying case
(limited to netatalk) to avoid MAC label lookup on both mbufs if no
policies are registered.

Obtained from:	TrustedBSD Project
2009-06-03 19:41:12 +00:00
Robert Watson
3de4046939 Continue work to optimize performance of "options MAC" when no MAC policy
modules are loaded by avoiding mbuf label lookups when policies aren't
loaded, pushing further socket locking into MAC policy modules, and
avoiding locking MAC ifnet locks when no policies are loaded:

- Check mac_policies_count before looking for mbuf MAC label m_tags in MAC
  Framework entry points.  We will still pay label lookup costs if MAC
  policies are present but don't require labels (typically a single mbuf
  header field read, but perhaps further indirection if IPSEC or other
  m_tag consumers are in use).

- Further push socket locking for socket-related access control checks and
  events into MAC policies from the MAC Framework, so that sockets are
  only locked if a policy specifically requires a lock to protect a label.
  This resolves lock order issues during sonewconn() and also in local
  domain socket cross-connect where multiple socket locks could not be
  held at once for the purposes of propagatig MAC labels across multiple
  sockets.  Eliminate mac_policy_count check in some entry points where it
  no longer avoids locking.

- Add mac_policy_count checking in some entry points relating to network
  interfaces that otherwise lock a global MAC ifnet lock used to protect
  ifnet labels.

Obtained from:	TrustedBSD Project
2009-06-03 18:46:28 +00:00
Robert Watson
15141acc67 By default, label all network interfaces as biba/equal on attach. This
makes it easier for first-time users to configure and work with biba as
remote acess is still allowed.  Effectively, this means that, by default,
only local security properties, not distributed ones, are enforced.

Obtained from:	TrustedBSD Project
2009-06-03 08:49:44 +00:00
Robert Watson
5f51fb4871 Mark MAC Framework sx and rm locks as NOWITNESS to suppress warnings that
might arise from WITNESS not understanding its locking protocol, which
should be deadlock-free.  Currently these warnings generally don't occur,
but as object locking is pushed into policies for some object types, they
would otherwise occur more often.

Obtained from:	TrustedBSD Project
2009-06-02 22:22:09 +00:00
Robert Watson
f93bfb23dc Add internal 'mac_policy_count' counter to the MAC Framework, which is a
count of the number of registered policies.

Rather than unconditionally locking sockets before passing them into MAC,
lock them in the MAC entry points only if mac_policy_count is non-zero.

This avoids locking overhead for a number of socket system calls when no
policies are registered, eliminating measurable overhead for the MAC
Framework for the socket subsystem when there are no active policies.

Possibly socket locks should be acquired by policies if they are required
for socket labels, which would further avoid locking overhead when there
are policies but they don't require labeling of sockets, or possibly
don't even implement socket controls.

Obtained from:	TrustedBSD Project
2009-06-02 18:26:17 +00:00
Robert Watson
1a109c1cb0 Make the rmlock(9) interface a bit more like the rwlock(9) interface:
- Add rm_init_flags() and accept extended options only for that variation.
- Add a flags space specifically for rm_init_flags(), rather than borrowing
  the lock_init() flag space.
- Define flag RM_RECURSE to use instead of LO_RECURSABLE.
- Define flag RM_NOWITNESS to allow an rmlock to be exempt from WITNESS
  checking; this wasn't possible previously as rm_init() always passed
  LO_WITNESS when initializing an rmlock's struct lock.
- Add RM_SYSINIT_FLAGS().
- Rename embedded mutex in rmlocks to make it more obvious what it is.
- Update consumers.
- Update man page.
2009-05-29 10:52:37 +00:00
Jamie Gritton
0304c73163 Add hierarchical jails. A jail may further virtualize its environment
by creating a child jail, which is visible to that jail and to any
parent jails.  Child jails may be restricted more than their parents,
but never less.  Jail names reflect this hierarchy, being MIB-style
dot-separated strings.

Every thread now points to a jail, the default being prison0, which
contains information about the physical system.  Prison0's root
directory is the same as rootvnode; its hostname is the same as the
global hostname, and its securelevel replaces the global securelevel.
Note that the variable "securelevel" has actually gone away, which
should not cause any problems for code that properly uses
securelevel_gt() and securelevel_ge().

Some jail-related permissions that were kept in global variables and
set via sysctls are now per-jail settings.  The sysctls still exist for
backward compatibility, used only by the now-deprecated jail(2) system
call.

Approved by:	bz (mentor)
2009-05-27 14:11:23 +00:00
Robert Watson
81fee06f9c Convert the MAC Framework from using rwlocks to rmlocks to stabilize
framework registration for non-sleepable entry points.

Obtained from:	TrustedBSD Project
2009-05-27 09:41:58 +00:00
Attilio Rao
dfd233edd5 Remove the thread argument from the FSD (File-System Dependent) parts of
the VFS.  Now all the VFS_* functions and relating parts don't want the
context as long as it always refers to curthread.

In some points, in particular when dealing with VOPs and functions living
in the same namespace (eg. vflush) which still need to be converted,
pass curthread explicitly in order to retain the old behaviour.
Such loose ends will be fixed ASAP.

While here fix a bug: now, UFS_EXTATTR can be compiled alone without the
UFS_EXTATTR_AUTOSTART option.

VFS KPI is heavilly changed by this commit so thirdy parts modules needs
to be recompiled.  Bump __FreeBSD_version in order to signal such
situation.
2009-05-11 15:33:26 +00:00
Robert Watson
fa76567150 Rename MAC Framework-internal macros used to invoke policy entry points:
MAC_BOOLEAN           -> MAC_POLICY_BOOLEAN
  MAC_BOOLEAN_NOSLEEP   -> MAC_POLICY_BOOLEANN_NOSLEEP
  MAC_CHECK             -> MAC_POLICY_CHECK
  MAC_CHECK_NOSLEEP     -> MAC_POLICY_CHECK_NOSLEEP
  MAC_EXTERNALIZE       -> MAC_POLICY_EXTERNALIZE
  MAC_GRANT             -> MAC_POLICY_GRANT
  MAC_GRANT_NOSLEEP     -> MAC_POLICY_GRANT_NOSLEEP
  MAC_INTERNALIZE       -> MAC_POLICY_INTERNALIZE
  MAC_PERFORM           -> MAC_POLICY_PERFORM_CHECK
  MAC_PERFORM_NOSLEEP   -> MAC_POLICY_PERFORM_NOSLEEP

This frees up those macro names for use in wrapping calls into the MAC
Framework from the remainder of the kernel.

Obtained from:	TrustedBSD Project
2009-05-01 21:05:40 +00:00
Robert Watson
2a5058a3ed Temporarily relax the constraints on argument size checking for A_GETCOND;
login(1) isn't quite ready for them yet on 64-bit systems as it continues
to use the conventions of the old version of the API.

Reported by:	stas, Jakub Lach <jakub_lach at mailplus.pl>
2009-04-19 23:28:08 +00:00
Robert Watson
4df4e33572 Merge OpenBSM 1.1 changes to the FreeBSD 8.x kernel:
- Add and use mapping of fcntl(2) commands to new BSM constant space.
- Adopt (int) rather than (long) arguments to a number of auditon(2)
  commands, as has happened in Solaris, and add compatibility code to
  handle the old comments.

Note that BSM_PF_IEEE80211 is partially but not fully removed, as the
userspace OpenBSM 1.1alpha5 code still depends on it.  Once userspace
is updated, I'll GCC the kernel constant.

MFC after:		2 weeks
Sponsored by:		Apple, Inc.
Obtained from:		TrustedBSD Project
Portions submitted by:	sson
2009-04-19 14:53:17 +00:00
Robert Watson
fe69399069 Merge new kernel files from OpenBSM 1.1: audit_fcntl.h and
audit_bsm_fcntl.c contain utility routines to map local fcntl
commands into BSM constants.  Adaptation to the FreeBSD kernel
environment will follow in a future commit.

Sponsored by:	Apple, Inc.
Obtained from:	TrustedBSD Project
MFC after:	2 weeks
2009-04-16 20:17:32 +00:00
Robert Watson
2f106d5e08 Remove D_NEEDGIANT from audit pipes. I'm actually not sure why this was
here, but isn't needed.

MFC after:	2 weeks
Sponsored by:	Apple, Inc.
2009-04-16 11:57:16 +00:00
Edward Tomasz Napierala
6180d3185d Get rid of VSTAT and replace it with VSTAT_PERMS, which is somewhat
better defined.

Approved by:	rwatson (mentor)
2009-03-29 17:45:48 +00:00
Pawel Jakub Dawidek
a3ce3b6d35 - Correct logic in if statement - we want to allocate temporary buffer
when someone is passing new rules, not when he only want to read them.
  Because of this bug, even if the given rules were incorrect, they
  ended up in rule_string.
- Add missing protection for rule_string when coping it.

Reviewed by:	rwatson
MFC after:	1 week
2009-03-14 20:40:06 +00:00
Robert Watson
4020272933 Rework MAC Framework synchronization in a number of ways in order to
improve performance:

- Eliminate custom reference count and condition variable to monitor
  threads entering the framework, as this had both significant overhead
  and behaved badly in the face of contention.

- Replace reference count with two locks: an rwlock and an sx lock,
  which will be read-acquired by threads entering the framework
  depending on whether a give policy entry point is permitted to sleep
  or not.

- Replace previous mutex locking of the reference count for exclusive
  access with write acquiring of both the policy list sx and rw locks,
  which occurs only when policies are attached or detached.

- Do a lockless read of the dynamic policy list head before acquiring
  any locks in order to reduce overhead when no dynamic policies are
  loaded; this a race we can afford to lose.

- For every policy entry point invocation, decide whether sleeping is
  permitted, and if not, use a _NOSLEEP() variant of the composition
  macros, which will use the rwlock instead of the sxlock.  In some
  cases, we decide which to use based on allocation flags passed to the
  MAC Framework entry point.

As with the move to rwlocks/rmlocks in pfil, this may trigger witness
warnings, but these should (generally) be false positives as all
acquisition of the locks is for read with two very narrow exceptions
for policy load/unload, and those code blocks should never acquire
other locks.

Sponsored by:	Google, Inc.
Obtained from:	TrustedBSD Project
Discussed with:	csjp (idea, not specific patch)
2009-03-14 16:06:06 +00:00
Christian S.J. Peron
095b4d2689 Mark the bsdextended rules sysctl as being mpsafe.
Discussed with:	rwatson
2009-03-09 17:42:18 +00:00
Robert Watson
b3f468e253 Add a new thread-private flag, TDP_AUDITREC, to indicate whether or
not there is an audit record hung off of td_ar on the current thread.
Test this flag instead of td_ar when auditing syscall arguments or
checking for an audit record to commit on syscall return.  Under
these circumstances, td_pflags is much more likely to be in the cache
(especially if there is no auditing of the current system call), so
this should help reduce cache misses in the system call return path.

MFC after:      1 week
Reported by:    kris
Obtained from:  TrustedBSD Project
2009-03-09 10:45:58 +00:00
Robert Watson
fefd0ac8a9 Remove 'uio' argument from MAC Framework and MAC policy entry points for
extended attribute get/set; in the case of get an uninitialized user
buffer was passed before the EA was retrieved, making it of relatively
little use; the latter was simply unused by any policies.

Obtained from:	TrustedBSD Project
Sponsored by:	Google, Inc.
2009-03-08 12:32:06 +00:00
Robert Watson
c14172e3ae Rename 'ucred' argument to mac_socket_check_bind() to 'cred' to match
other use of the same variable type.

Obtained from:	TrustedBSD Project
Sponsored by:	Google, Inc.
2009-03-08 12:22:00 +00:00
Robert Watson
6f6174a762 Improve the consistency of MAC Framework and MAC policy entry point
naming by renaming certain "proc" entry points to "cred" entry points,
reflecting their manipulation of credentials.  For some entry points,
the process was passed into the framework but not into policies; in
these cases, stop passing in the process since we don't need it.

  mac_proc_check_setaudit -> mac_cred_check_setaudit
  mac_proc_check_setaudit_addr -> mac_cred_check_setaudit_addr
  mac_proc_check_setauid -> mac_cred_check_setauid
  mac_proc_check_setegid -> mac_cred_check_setegid
  mac_proc_check_seteuid -> mac_cred_check_seteuid
  mac_proc_check_setgid -> mac_cred_check_setgid
  mac_proc_check_setgroups -> mac_cred_ceck_setgroups
  mac_proc_check_setregid -> mac_cred_check_setregid
  mac_proc_check_setresgid -> mac_cred_check_setresgid
  mac_proc_check_setresuid -> mac_cred_check_setresuid
  mac_proc_check_setreuid -> mac_cred_check_setreuid
  mac_proc_check_setuid -> mac_cred_check_setuid

Obtained from:	TrustedBSD Project
Sponsored by:	Google, Inc.
2009-03-08 10:58:37 +00:00
Robert Watson
2087a58ca2 Add static DTrace probes for MAC Framework access control checks and
privilege grants so that dtrace can be more easily used to monitor
the security decisions being generated by the MAC Framework following
policy invocation.

Successful access control checks will be reported by:

  mac_framework:kernel:<entrypoint>:mac_check_ok

Failed access control checks will be reported by:

  mac_framework:kernel:<entrypoint>:mac_check_err

Successful privilege grants will be reported by:

  mac_framework:kernel:priv_grant:mac_grant_ok

Failed privilege grants will be reported by:

  mac_framework:kernel:priv_grant:mac_grant_err

In all cases, the return value (always 0 for _ok, otherwise an errno
for _err) will be reported via arg0 on the probe, and subsequent
arguments will hold entrypoint-specific data, in a style similar to
privilege tracing.

Obtained from:	TrustedBSD Project
Sponsored by:	Google, Inc.
2009-03-08 00:50:37 +00:00
Robert Watson
73e416e35d Reduce the verbosity of SDT trace points for DTrace by defining several
wrapper macros that allow trace points and arguments to be declared
using a single macro rather than several.  This means a lot less
repetition and vertical space for each trace point.

Use these macros when defining privilege and MAC Framework trace points.

Reviewed by:	jb
MFC after:	1 week
2009-03-03 17:15:05 +00:00
Robert Watson
06edd2f1e8 Merge OpenBSM 1.1 beta 1 from OpenBSM vendor branch to head, both
contrib/openbsm (svn merge) and src/sys/{bsm,security/audit} (manual
merge).

OpenBSM history for imported revision below for reference.

MFC after:      1 month
Sponsored by:   Apple, Inc.
Obtained from:  TrustedBSD Project

OpenBSM 1.1 beta 1

- The filesz parameter in audit_control(5) now accepts suffixes: 'B' for
  Bytes, 'K' for Kilobytes, 'M' for Megabytes, and 'G' for Gigabytes.
  For legacy support no suffix defaults to bytes.
- Audit trail log expiration support added.  It is configured in
  audit_control(5) with the expire-after parameter.  If there is no
  expire-after parameter in audit_control(5), the default, then the audit
  trail files are not expired and removed.  See audit_control(5) for
  more information.
- Change defaults in audit_control: warn at 5% rather than 20% free for audit
  partitions, rotate automatically at 2mb, and set the default policy to
  cnt,argv rather than cnt so that execve(2) arguments are captured if
  AUE_EXECVE events are audited.  These may provide more usable defaults for
  many users.
- Use au_domain_to_bsm(3) and au_socket_type_to_bsm(3) to convert
  au_to_socket_ex(3) arguments to BSM format.
- Fix error encoding AUT_IPC_PERM tokens.
2009-03-02 13:29:18 +00:00
Konstantin Belousov
ad062f5bb8 Use vm_map_entry_t instead of explicit struct vm_map_entry *.
Reviewed by:	alc
2009-02-24 20:27:48 +00:00
Robert Watson
8f8dedbed8 Set the lower bound on queue size for an audit pipe to 1 instead of 0,
as an audit pipe with a queue length of 0 is less useful.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
MFC after:	1 week
2009-02-08 15:38:31 +00:00
Robert Watson
f4f93a63f5 Change various routines that are responsible for transforming audit
event IDs based on arguments to return au_event_t rather than int.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
MFC after:	1 week
2009-02-08 14:39:35 +00:00
Robert Watson
8b14aeee4b Audit AUE_MAC_EXECVE; currently just the standard AUE_EXECVE arguments
and not the label.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
MFC after:	1 week
2009-02-08 14:24:35 +00:00
Robert Watson
4ba1f444c5 Audit the flag argument to the nfssvc(2) system call.
Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
2009-02-08 14:04:08 +00:00
Robert Watson
91e832e0c3 Eliminate the local variable 'ape' in audit_pipe_kqread(), as it's only
used for an assertion that we don't really need anymore.

MFC after:	1 week
Reported by:	Christoph Mallon <christoph dot mallon at gmx dot de>
2009-02-04 19:56:37 +00:00
Robert Watson
c7ed8c0a85 Use __FBSDID() for $FreeBSD$ version strings in .c files.
Obtained from:	TrustedBSD Project
MFC after:	3 days
2009-01-24 13:15:45 +00:00
Robert Watson
91ec000612 Begin to add SDT tracing of the MAC Framework: add policy modevent,
register, and unregister hooks that give access to the mac_policy_conf
for the policy.

Obtained from:	TrustedBSD Project
MFC after:	3 days
2009-01-24 10:57:32 +00:00
Robert Watson
07cd9ab013 Update copyright, P4 version number as audit_bsm_token.c reflects changes
in bsm_token.c through  from OpenBSM.

MFC after:	1 month
Sponsored by:	Apple, Inc.
Obtained from:	TrustedBSD Project
2009-01-14 12:16:14 +00:00
Robert Watson
c74c7b73a0 Merge OpenBSM alpha 5 from OpenBSM vendor branch to head, both
contrib/openbsm (svn merge) and src/sys/{bsm,security/audit} (manual
merge).  Hook up bsm_domain.c and bsm_socket_type.c to the libbsm
build along with man pages, add audit_bsm_domain.c and
audit_bsm_socket_type.c to the kernel environment.

OpenBSM history for imported revisions below for reference.

MFC after:      1 month
Sponsored by:   Apple Inc.
Obtained from:  TrustedBSD Project

OpenBSM 1.1 alpha 5

- Stub libauditd(3) man page added.
- All BSM error number constants with BSM_ERRNO_.
- Interfaces to convert between local and BSM socket types and protocol
  families have been added: au_bsm_to_domain(3), au_bsm_to_socket_type(3),
  au_domain_to_bsm(3), and au_socket_type_to_bsm(3), along with definitions
  of constants in audit_domain.h and audit_socket_type.h.  This improves
  interoperability by converting local constant spaces, which vary by OS, to
  and from Solaris constants (where available) or OpenBSM constants for
  protocol domains not present in Solaris (a fair number).  These routines
  should be used when generating and interpreting extended socket tokens.
- Fix build warnings with full gcc warnings enabled on most supported
  platforms.
- Don't compile error strings into bsm_errno.c when building it in the kernel
  environment.
- When started by launchd, use the label com.apple.auditd rather than
  org.trustedbsd.auditd.
2009-01-14 10:44:16 +00:00
Robert Watson
9162f64b58 Rather than having MAC policies explicitly declare what object types
they label, derive that information implicitly from the set of label
initializers in their policy operations set.  This avoids a possible
class of programmer errors, while retaining the structure that
allows us to avoid allocating labels for objects that don't need
them.  As before, we regenerate a global mask of labeled objects
each time a policy is loaded or unloaded, stored in mac_labeled.

Discussed with:   csjp
Suggested by:     Jacques Vidrine <nectar at apple.com>
Obtained from:    TrustedBSD Project
Sponsored by:     Apple, Inc.
2009-01-10 10:58:41 +00:00
Robert Watson
dbdcb99498 Use MPC_OBJECT_IP6Q to indicate labeling of struct ip6q rather than
MPC_OBJECT_IPQ; it was already defined, just not used.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
2009-01-10 09:17:16 +00:00
Robert Watson
d423f266c4 Do a lockless read of the audit pipe list before grabbing the audit pipe
lock in order to avoid the lock acquire hit if the pipe list is very
likely empty.

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	Apple, Inc.
2009-01-06 14:15:38 +00:00
Robert Watson
cd6bbe656e In AUDIT_SYSCALL_EXIT(), invoke audit_syscall_exit() only if an audit
record is active on the current thread--historically we may always
have wanted to enter the audit code if auditing was enabled, but now
we just commit the audit record so don't need to enter if there isn't
one.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
2009-01-06 13:59:59 +00:00
Robert Watson
efcde1e8c7 Fix white space botch: use carriage returns rather than tabs. 2008-12-31 23:22:45 +00:00
Robert Watson
3c36dc8159 Commit two files missed in previous commit: hook up audit_bsm_errno.c
and adapt for kernel build environment.

Obtained from:	TrustedBSD Project
Sponsored by:	Apple, Inc.
2008-12-31 13:56:31 +00:00
Robert Watson
fcdb2e9607 Call au_errno_to_bsm() on the errno value passed into au_to_return32()
to convert local FreeBSD error numbers into BSM error numbers.

Obtained from:	TrustedBSD Project
2008-12-31 11:56:35 +00:00
Robert Watson
7a0a89d2cb Merge OpenBSM alpha 4 from OpenBSM vendor branch to head, both
contrib/openbsm (svn merge) and src/sys/{bsm,security/audit} (manual
merge).  Add libauditd build parts and add to auditd's linkage;
force libbsm to build before libauditd.

OpenBSM history for imported revisions below for reference.

MFC after:      1 month
Sponsored by:   Apple Inc.
Obtained from:  TrustedBSD Project

OpenBSM 1.1 alpha 4

- With the addition of BSM error number mapping, we also need to map the
  local error number passed to audit_submit(3) to a BSM error number,
  rather than have the caller perform that conversion.
- Reallocate user audit events to avoid collisions with Solaris; adopt a
  more formal allocation scheme, and add some events allocated in Solaris
  that will be of immediate use on other platforms.
- Add an event for Calife.
- Add au_strerror(3), which allows generating strings for BSM errors
  directly, rather than requiring applications to map to the local error
  space, which might not be able to entirely represent the BSM error
  number space.
- Major auditd rewrite for launchd(8) support.  Add libauditd library
  that is shared between launchd and auditd.
- Add AUDIT_TRIGGER_INITIALIZE trigger (sent via 'audit -i') for
  (re)starting auditing under launchd(8) on Mac OS X.
- Add 'current' symlink to active audit trail.
- Add crash recovery of previous audit trail file when detected on audit
  startup that it has not been properly terminated.
- Add the event AUE_audit_recovery to indicated when an audit trail file
  has been recovered from not being properly terminated.  This event is
  stored in the new audit trail file and includes the path of recovered
  audit trail file.
- Mac OS X and FreeBSD dependent code in auditd.c is separated into
  auditd_darwin.c and auditd_fbsd.c files.
- Add an event for the posix_spawn(2) and fsgetpath(2) Mac OS X system
  calls.
- For Mac OS X, we use ASL(3) instead of syslog(3) for logging.
- Add support for NOTICE level logging.

OpenBSM 1.1 alpha 3

- Add two new functions, au_bsm_to_errno() and au_errno_to_bsm(), to map
  between BSM error numbers (largely the Solaris definitions) and local
  errno(2) values for 32-bit and 64-bit return tokens.  This is required
  as operating systems don't agree on some of the values of more recent
  error numbers.
- Fix a bug how au_to_exec_args(3) and au_to_exec_env(3) calculates the
  total size for the token.  This buge.
- Deprecated Darwin constants, such as TRAILER_PAD_MAGIC, removed.
2008-12-31 11:12:24 +00:00
Alan Cox
1361cdc644 Make preparations for resurrecting shared/read locks on vm maps:
mac_proc_vm_revoke_recurse() requests a read lock on the vm map at the start
but does not handle failure by vm_map_lock_upgrade() when it seeks to modify
the vm map.  At present, this works because all lock request on a vm map are
implemented as exclusive locks.  Thus, vm_map_lock_upgrade() is a no-op that
always reports success.  However, that is about to change, and
proc_vm_revoke_recurse() will require substantial modifications to handle
vm_map_lock_upgrade() failures.  For the time being, I am changing
mac_proc_vm_revoke_recurse() to request a write lock on the vm map at the
start.

Approved by:	rwatson
MFC after:	3 months
2008-12-22 17:32:52 +00:00
Robert Watson
52267f7411 Merge OpenBSM 1.1 alpha 2 from the OpenBSM vendor branch to head, both
contrib/openbsm (svn merge) and sys/{bsm,security/audit} (manual merge).

- Add OpenBSM contrib tree to include paths for audit(8) and auditd(8).
- Merge support for new tokens, fixes to existing token generation to
  audit_bsm_token.c.
- Synchronize bsm includes and definitions.

OpenBSM history for imported revisions below for reference.

MFC after:      1 month
Sponsored by:   Apple Inc.
Obtained from:  TrustedBSD Project

--

OpenBSM 1.1 alpha 2

- Include files in OpenBSM are now broken out into two parts: library builds
  required solely for user space, and system includes, which may also be
  required for use in the kernels of systems integrating OpenBSM.  Submitted
  by Stacey Son.
- Configure option --with-native-includes allows forcing the use of native
  include for system includes, rather than the versions bundled with OpenBSM.
  This is intended specifically for platforms that ship OpenBSM, have adapted
  versions of the system includes in a kernel source tree, and will use the
  OpenBSM build infrastructure with an unmodified OpenBSM distribution,
  allowing the customized system includes to be used with the OpenBSM build.
  Submitted by Stacey Son.
- Various strcpy()'s/strcat()'s have been changed to strlcpy()'s/strlcat()'s
  or asprintf().  Added compat/strlcpy.h for Linux.
- Remove compatibility defines for old Darwin token constant names; now only
  BSM token names are provided and used.
- Add support for extended header tokens, which contain space for information
  on the host generating the record.
- Add support for setting extended host information in the kernel, which is
  used for setting host information in extended header tokens.  The
  audit_control file now supports a "host" parameter which can be used by
  auditd to set the information; if not present, the kernel parameters won't
  be set and auditd uses unextended headers for records that it generates.

OpenBSM 1.1 alpha 1

- Add option to auditreduce(1) which allows users to invert sense of
  matching, such that BSM records that do not match, are selected.
- Fix bug in audit_write() where we commit an incomplete record in the
  event there is an error writing the subject token.  This was submitted
  by Diego Giagio.
- Build support for Mac OS X 10.5.1 submitted by Eric Hall.
- Fix a bug which resulted in host XML attributes not being arguments so
  that const strings can be passed as arguments to tokens.  This patch was
  submitted by Xin LI.
- Modify the -m option so users can select more then one audit event.
- For Mac OS X, added Mach IPC support for audit trigger messages.
- Fixed a bug in getacna() which resulted in a locking problem on Mac OS X.
- Added LOG_PERROR flag to openlog when -d option is used with auditd.
- AUE events added for Mac OS X Leopard system calls.
2008-12-02 23:26:43 +00:00
Christian S.J. Peron
5ac14ef177 Partially roll back a revision which changed the error code being returned
by getaudit(2).  Some applications such has su, id will interpret E2BIG as
requiring the use of getaudit_addr(2) to pull extended audit state (ip6)
from the kernel.

This change un-breaks the ABI when auditing has been activated on a system
and the users are logged in via ip6.

This is a RELENG_7_1 candidate.

MFC after:	1 day
Discussed with:	rwatson
2008-11-30 19:58:03 +00:00
Bjoern A. Zeeb
413628a7e3 MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
  and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
  help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
  suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
  on cluster machines as well as all the testers and people
  who provided feedback the last months on freebsd-jail and
  other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by:	(see above)
MFC after:	3 months (this is just so that I get the mail)
X-MFC Before:   7.2-RELEASE if possible
2008-11-29 14:32:14 +00:00
Robert Watson
a760c0b245 Regularize /* FALLTHROUGH */ comments in the BSM event type switch, and
add one that was missing.

MFC after:	3 weeks
Coverity ID:	3960
2008-11-25 11:25:45 +00:00
Robert Watson
e6870c95e3 When repeatedly accessing a thread credential, cache the credential
pointer in a local thread.  While this is unlikely to significantly
improve performance given modern compiler behavior, it makes the code
more readable and reduces diffs to the Mac OS X version of the same
code (which stores things in creds in the same way, but where the
cred for a thread is reached quite differently).

Discussed with: sson
MFC after:      1 month
Sponsored by:   Apple Inc.
Obtained from:	TrustedBSD Project
2008-11-14 01:24:52 +00:00
Robert Watson
618521b1a2 The audit queue limit variables are size_t, so use size_t for the audit
queue length variables as well, avoiding storing the limit in a larger
type than the length.

Submitted by:	sson
Sponsored by:	Apple Inc.
MFC after:	1 week
2008-11-13 00:21:01 +00:00
Robert Watson
4ebff7e0ca Move audit-internal function definitions for getting and setting audit
kinfo state to audit_private.h.
2008-11-11 23:08:20 +00:00
Robert Watson
91721ee9ba Minor style tweaks and change lock name string to use _'s and not spaces
to improve parseability.
2008-11-11 22:59:40 +00:00
Christian S.J. Peron
ffbcef5a42 Add support for extended header BSM tokens. Currently we use the
regular header tokens.  The extended header tokens contain an IP
or IPv6 address which makes it possible to identify which host an
audit record came from when audit records are centralized.

If the host information has not been specified, the system will
default to the old style headers.  Otherwise, audit records that
are created as a result of system calls will contain host information.

This implemented has been designed to be consistent with the Solaris
implementation.  Host information is set/retrieved using the A_GETKAUDIT
and A_SETKAUDIT auditon(2) commands.  These commands require that a
pointer to a auditinfo_addr_t object is passed.  Currently only IP and
IPv6 address families are supported.

The users pace bits associated with this change will follow in an
openbsm import.

Reviewed by:	rwatson, (sson, wsalamon (older version))
MFC after:	1 month
2008-11-11 21:57:03 +00:00
Robert Watson
b713bf6e3a Wrap sx locking of the audit worker sleep lock in macros, update comments.
MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-10 22:06:24 +00:00
John Baldwin
927edcc9ba Use shared vnode locks for auditing vnode arguments as auditing only
does a VOP_GETATTR() which does not require an exclusive lock.

Reviewed by:	csjp, rwatson
2008-11-04 22:31:04 +00:00
John Baldwin
16da60664d Don't lock the vnode around calls to vn_fullpath().
Reviewed by:	csjp, rwatson
2008-11-04 22:30:24 +00:00
Robert Watson
d2f6bb070f Update introductory comment for audit pipes.
MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-02 00:25:48 +00:00
Robert Watson
6e1362b499 Remove stale comment about filtering in audit pipe ioctl routine: we do
support filtering now, although we may want to make it more interesting
in the future.

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-02 00:18:19 +00:00
Robert Watson
e4565e2028 Add comment for per-pipe stats.
MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-01 23:05:49 +00:00
Robert Watson
cff9c52e23 We only allow a partial read of the first record in an audit pipe
record queue, so move the offset field from the per-record
audit_pipe_entry structure to the audit_pipe structure.

Now that we support reading more than one record at a time, add a
new summary field to audit_pipe, ap_qbyteslen, which tracks the
total number of bytes present in a pipe, and return that (minus
the current offset) via FIONREAD and kqueue's data variable for
the pending byte count rather than the number of bytes remaining
in only the first record.

Add a number of asserts to confirm that these counts and offsets
following the expected rules.

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-01 21:56:45 +00:00
Robert Watson
a9275e0bd5 Allow a single read(2) system call on an audit pipe to retrieve data from
more than one audit record at a time in order to improve efficiency.

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-11-01 21:16:09 +00:00
Robert Watson
1a0edb10ca Since there is no longer the opportunity for record truncation, just
return 0 if the truncation counter is queried on an audit pipe.

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-10-31 15:11:01 +00:00
Robert Watson
5a9d15cd4c Historically, /dev/auditpipe has allows only whole records to be read via
read(2), which meant that records longer than the buffer passed to read(2)
were dropped.  Instead take the approach of allowing partial reads to be
continued across multiple system calls more in the style of streaming
character device.

This means retaining a record on the per-pipe queue in a partially read
state, so maintain a current offset into the record.  Keep the record on
the queue during a read, so add a new lock, ap_sx, to serialize removal
of records from the queue by either read(2) or ioctl(2) requesting a pipe
flush.  Modify the kqueue handler to return bytes left in the current
record rather than simply the size of the current record.

It is now possible to use praudit, which used the standard FILE * buffer
sizes, to track much larger record sizes from /dev/auditpipe, such as
very long command lines to execve(2).

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-10-31 14:40:21 +00:00
Robert Watson
1daa6feb45 When we drop an audit record going to and audit pipe because the audit
pipe has overflowed, drop the newest, rather than oldest, record.  This
makes overflow drop behavior consistent with memory allocation failure
leading to drop, avoids touching the consumer end of the queue from a
producer, and lowers the CPU overhead of dropping a record by dropping
before memory allocation and copying.

Obtained from:	Apple, Inc.
MFC after:	2 months
2008-10-30 23:09:19 +00:00
Robert Watson
846f37f1e7 Break out single audit_pipe_mtx into two types of locks: a global rwlock
protecting the list of audit pipes, and a per-pipe mutex protecting the
queue.

Likewise, replace the single global condition variable used to signal
delivery of a record to one or more pipes, and add a per-pipe condition
variable to avoid spurious wakeups when event subscriptions differ
across multiple pipes.

This slightly increases the cost of delivering to audit pipes, but should
reduce lock contention in the presence of multiple readers as only the
per-pipe lock is required to read from a pipe, as well as avoid
overheading when different pipes are used in different ways.

MFC after:	2 months
Sponsored by:	Apple, Inc.
2008-10-30 21:58:39 +00:00
Robert Watson
c211285f25 Protect the event->class lookup database using an rwlock instead of a
mutex, as it's rarely changed but frequently accessed read-only from
multiple threads, so a potentially significant source of contention.

MFC after:	1 month
Sponsored by:	Apple, Inc.
2008-10-30 17:47:57 +00:00
Robert Watson
a1b9471a47 The V* flags passed using an accmode_t to the access() and open()
access control checks in mac_bsdextended are not in the same
namespace as the MBI_ flags used in ugidfw policies, so add an
explicit conversion routine to get from one to the other.

Obtained from:	TrustedBSD Project
2008-10-30 10:13:53 +00:00
Edward Tomasz Napierala
178da2a90e Commit part of accmode_t changes that I missed in previous commit.
Approved by:	rwatson (mentor)
2008-10-28 21:57:32 +00:00
Robert Watson
564f8f0fee Break out strictly credential-related portions of mac_process.c into a
new file, mac_cred.c.

Obtained from:	TrustedBSD Project
2008-10-28 21:53:10 +00:00
Edward Tomasz Napierala
15bc6b2bd8 Introduce accmode_t. This is required for NFSv4 ACLs - it will be neccessary
to add more V* constants, and the variables changed by this patch were often
being assigned to mode_t variables, which is 16 bit.

Approved by:	rwatson (mentor)
2008-10-28 13:44:11 +00:00
Robert Watson
9215889d21 Rename mac_cred_mmapped_drop_perms(), which revokes access to virtual
memory mappings when the MAC label on a process changes, to
mac_proc_vm_revoke(),

It now also acquires its own credential reference directly from the
affected process rather than accepting one passed by the the caller,
simplifying the API and consumer code.

Obtained from:	TrustedBSD Project
2008-10-28 12:49:07 +00:00
Robert Watson
212ab0cfb3 Rename three MAC entry points from _proc_ to _cred_ to reflect the fact
that they operate directly on credentials: mac_proc_create_swapper(),
mac_proc_create_init(), and mac_proc_associate_nfsd().  Update policies.

Obtained from:	TrustedBSD Project
2008-10-28 11:33:06 +00:00
Robert Watson
048e2d5899 Extended comment on why we consider a partition relabel request of "0" to
be a no-op request, and why this might have to change if we want to allow
leaving a partition someday.

Obtained from:	TrustedBSD Project
MFC after:	3 days
2008-10-28 09:16:34 +00:00