Commit Graph

546 Commits

Author SHA1 Message Date
Christian S.J. Peron
0f7e334a95 Fix gratuitous whitespace bug
MFC after:	1 week
Obtained from:	TrustedBSD Project
2008-01-18 19:57:21 +00:00
Christian S.J. Peron
cd109a68ae Add a case for AUE_LISTEN. This removes the following console error message:
"BSM conversion requested for unknown event 43140"

It should be noted that we need to audit the fd argument for this system
call.

Obtained from:	TrustedBSD Project
MFC after:	1 week
2008-01-18 19:50:34 +00:00
Attilio Rao
22db15c06f VOP_LOCK1() (and so VOP_LOCK()) and VOP_UNLOCK() are only used in
conjuction with 'thread' argument passing which is always curthread.
Remove the unuseful extra-argument and pass explicitly curthread to lower
layer functions, when necessary.

KPI results broken by this change, which should affect several ports, so
version bumping and manpage update will be further committed.

Tested by: kris, pho, Diego Sardina <siarodx at gmail dot com>
2008-01-13 14:44:15 +00:00
Attilio Rao
cb05b60a89 vn_lock() is currently only used with the 'curthread' passed as argument.
Remove this argument and pass curthread directly to underlying
VOP_LOCK1() VFS method. This modify makes the code cleaner and in
particular remove an annoying dependence helping next lockmgr() cleanup.
KPI results, obviously, changed.

Manpage and FreeBSD_version will be updated through further commits.

As a side note, would be valuable to say that next commits will address
a similar cleanup about VFS methods, in particular vop_lock1 and
vop_unlock.

Tested by:	Diego Sardina <siarodx at gmail dot com>,
		Andrea Di Pasquale <whyx dot it at gmail dot com>
2008-01-10 01:10:58 +00:00
John Baldwin
8e38aeff17 Add a new file descriptor type for IPC shared memory objects and use it to
implement shm_open(2) and shm_unlink(2) in the kernel:
- Each shared memory file descriptor is associated with a swap-backed vm
  object which provides the backing store.  Each descriptor starts off with
  a size of zero, but the size can be altered via ftruncate(2).  The shared
  memory file descriptors also support fstat(2).  read(2), write(2),
  ioctl(2), select(2), poll(2), and kevent(2) are not supported on shared
  memory file descriptors.
- shm_open(2) and shm_unlink(2) are now implemented as system calls that
  manage shared memory file descriptors.  The virtual namespace that maps
  pathnames to shared memory file descriptors is implemented as a hash
  table where the hash key is generated via the 32-bit Fowler/Noll/Vo hash
  of the pathname.
- As an extension, the constant 'SHM_ANON' may be specified in place of the
  path argument to shm_open(2).  In this case, an unnamed shared memory
  file descriptor will be created similar to the IPC_PRIVATE key for
  shmget(2).  Note that the shared memory object can still be shared among
  processes by sharing the file descriptor via fork(2) or sendmsg(2), but
  it is unnamed.  This effectively serves to implement the getmemfd() idea
  bandied about the lists several times over the years.
- The backing store for shared memory file descriptors are garbage
  collected when they are not referenced by any open file descriptors or
  the shm_open(2) virtual namespace.

Submitted by:	dillon, peter (previous versions)
Submitted by:	rwatson (I based this on his version)
Reviewed by:	alc (suggested converting getmemfd() to shm_open())
2008-01-08 21:58:16 +00:00
Robert Watson
3de213cc00 Add a new 'why' argument to kdb_enter(), and a set of constants to use
for that argument.  This will allow DDB to detect the broad category of
reason why the debugger has been entered, which it can use for the
purposes of deciding which DDB script to run.

Assign approximate why values to all current consumers of the
kdb_enter() interface.
2007-12-25 17:52:02 +00:00
Wojciech A. Koszek
7a9d5a45e7 Change "audit_pipe_preselect" to "audit_pipe_presel" to make it print
with proper alignment in ddb(4) and vmstat(8).

Reviewed by:	rwatson@
2007-12-25 13:23:19 +00:00
Robert Watson
b5f992b93d Fix a MAC label leak for POSIX semaphores, in which per-policy labels
would be properly disposed of, but the global label structure for the
semaphore wouldn't be freed.

MFC after:	3 days
Reported by:	tanyong <tanyong at ercist dot iscas dot ac dot cn>,
		zhouzhouyi
2007-12-17 17:26:32 +00:00
Wojciech A. Koszek
4ce05f7e44 Explicitly initialize 'ret' to 0'. It lets one to build tmpfs from the
latest source tree with older compiler--gcc3.

Approved by:	cognet (mentor)
2007-12-04 20:20:59 +00:00
Robert Watson
1876fb2118 Implement per-object type consistency checks for labels passed to
'internalize' operations rather than using a single common check.

Obtained from:	TrustedBSD Project
2007-10-30 00:01:28 +00:00
Robert Watson
323f4cc31d Replace use of AU_NULL with 0 when no audit classes are in use; this
supports the removal of hard-coded audit class constants in OpenBSM
1.0.  All audit classes are now dynamically configured via the
audit_class database.

Obtained from:	TrustedBSD Project
2007-10-29 18:07:48 +00:00
Robert Watson
f03368334e Canonicalize names of local variables.
Add some missing label checks in mac_test.

Obtained from:	TrustedBSD Project
2007-10-29 15:30:47 +00:00
Robert Watson
eb320b0ee7 Resort TrustedBSD MAC Framework policy entry point implementations and
declarations to match the object, operation sort order in the framework
itself.

Obtained from:	TrustedBSD Project
2007-10-29 13:33:06 +00:00
Robert Watson
f10b1ebc78 Add missing mac_test labeling and sleep checks for the syncache.
Discussed with:	csjp
Obtained from:	TrustedBSD Project
2007-10-28 18:33:31 +00:00
Robert Watson
2a9e17ce8e Garbage collect mac_mbuf_create_multicast_encap TrustedBSD MAC Framework
entry point, which is no longer required now that we don't support
old-style multicast tunnels.  This removes the last mbuf object class
entry point that isn't init/copy/destroy.

Obtained from:	TrustedBSD Project
2007-10-28 17:55:57 +00:00
Robert Watson
a13e21f7bc Continue to move from generic network entry points in the TrustedBSD MAC
Framework by moving from mac_mbuf_create_netlayer() to more specific
entry points for specific network services:

- mac_netinet_firewall_reply() to be used when replying to in-bound TCP
  segments in pf and ipfw (etc).

- Rename mac_netinet_icmp_reply() to mac_netinet_icmp_replyinplace() and
  add mac_netinet_icmp_reply(), reflecting that in some cases we overwrite
  a label in place, but in others we apply the label to a new mbuf.

Obtained from:	TrustedBSD Project
2007-10-28 17:12:48 +00:00
Robert Watson
b9b0dac33b Move towards more explicit support for various network protocol stacks
in the TrustedBSD MAC Framework:

- Add mac_atalk.c and add explicit entry point mac_netatalk_aarp_send()
  for AARP packet labeling, rather than using a generic link layer
  entry point.

- Add mac_inet6.c and add explicit entry point mac_netinet6_nd6_send()
  for ND6 packet labeling, rather than using a generic link layer entry
  point.

- Add expliict entry point mac_netinet_arp_send() for ARP packet
  labeling, and mac_netinet_igmp_send() for IGMP packet labeling,
  rather than using a generic link layer entry point.

- Remove previous genering link layer entry point,
  mac_mbuf_create_linklayer() as it is no longer used.

- Add implementations of new entry points to various policies, largely
  by replicating the existing link layer entry point for them; remove
  old link layer entry point implementation.

- Make MAC_IFNET_LOCK(), MAC_IFNET_UNLOCK(), and mac_ifnet_mtx global
  to the MAC Framework rather than static to mac_net.c as it is now
  needed outside of mac_net.c.

Obtained from:	TrustedBSD Project
2007-10-28 15:55:23 +00:00
Robert Watson
b0f4c777e4 Perform explicit label type checks for externalize entry points, rather than
a generic initialized test.

Obtained from:	TrustedBSD Project
2007-10-28 14:28:33 +00:00
Christian S.J. Peron
4777d3f98a Make sure we are incrementing the read count for each audit pipe read.
MFC after:	1 week
2007-10-27 22:28:01 +00:00
Robert Watson
438aeadf27 Give each posixsem MAC Framework entry point its own counter and test case
in the mac_test policy, rather than sharing a single function for all of
the access control checks.

Obtained from:	TrustedBSD Project
2007-10-27 10:38:57 +00:00
Robert Watson
6683b28d78 Update comment following MAC Framework entry point renaming and
reorganization.

Obtained from:	TrustedBSD Project
2007-10-26 21:16:34 +00:00
Robert Watson
8640764682 Rename 'mac_mbuf_create_from_firewall' to 'mac_netinet_firewall_send' as
we move towards netinet as a pseudo-object for the MAC Framework.

Rename 'mac_create_mbuf_linklayer' to 'mac_mbuf_create_linklayer' to
reflect general object-first ordering preference.

Sponsored by:	SPARTA (original patches against Mac OS X)
Obtained from:	TrustedBSD Project, Apple Computer
2007-10-26 13:18:38 +00:00
Christian S.J. Peron
57274c513c Implement AUE_CORE, which adds process core dump support into the kernel.
This change introduces audit_proc_coredump() which is called by coredump(9)
to create an audit record for the coredump event.  When a process
dumps a core, it could be security relevant.  It could be an indicator that
a stack within the process has been overflowed with an incorrectly constructed
malicious payload or a number of other events.

The record that is generated looks like this:

header,111,10,process dumped core,0,Thu Oct 25 19:36:29 2007, + 179 msec
argument,0,0xb,signal
path,/usr/home/csjp/test.core
subject,csjp,csjp,staff,csjp,staff,1101,1095,50457,10.37.129.2
return,success,1
trailer,111

- We allocate a completely new record to make sure we arent clobbering
  the audit data associated with the syscall that produced the core
  (assuming the core is being generated in response to SIGABRT  and not
  an invalid memory access).
- Shuffle around expand_name() so we can use the coredump name at the very
  beginning of the coredump call.  Make sure we free the storage referenced
  by "name" if we need to bail out early.
- Audit both successful and failed coredump creation efforts

Obtained from:	TrustedBSD Project
Reviewed by:	rwatson
MFC after:	1 month
2007-10-26 01:23:07 +00:00
Robert Watson
179da74eb8 Sort entry points in mac_framework.h and mac_policy.h alphabetically by
primary object type, and then by secondarily by method name.  This sorts
entry points relating to particular objects, such as pipes, sockets, and
vnodes together.

Sponsored by:	SPARTA (original patches against Mac OS X)
Obtained from:	TrustedBSD Project, Apple Computer
2007-10-25 22:45:25 +00:00
Robert Watson
02be6269c3 Normalize TCP syncache-related MAC Framework entry points to match most
other entry points in the form mac_<object>_method().

Discussed with:	csjp
Obtained from:	TrustedBSD Project
2007-10-25 14:37:37 +00:00
Robert Watson
eb2cd5e1df Rename mac_associate_nfsd_label() to mac_proc_associate_nfsd(), and move
from mac_vfs.c to mac_process.c to join other functions that setup up
process labels for specific purposes.  Unlike the two proc create calls,
this call is intended to run after creation when a process registers as
the NFS daemon, so remains an _associate_ call..

Obtained from:	TrustedBSD Project
2007-10-25 12:34:14 +00:00
Robert Watson
3f1a7a9086 Consistently name functions for mac_<policy> as <policy>_whatever rather
than mac_<policy>_whatever, as this shortens the names and makes the code
a bit easier to read.

When dealing with label structures, name variables 'mb', 'ml', 'mm rather
than the longer 'mac_biba', 'mac_lomac', and 'mac_mls', likewise making
the code a little easier to read.

Obtained from:	TrustedBSD Project
2007-10-25 11:31:11 +00:00
Robert Watson
a7f3aac7cb Further MAC Framework cleanup: normalize some local variable names and
clean up some comments.

Obtained from:	TrustedBSD Project
2007-10-25 07:49:47 +00:00
Robert Watson
30d239bc4c Merge first in a series of TrustedBSD MAC Framework KPI changes
from Mac OS X Leopard--rationalize naming for entry points to
the following general forms:

  mac_<object>_<method/action>
  mac_<object>_check_<method/action>

The previous naming scheme was inconsistent and mostly
reversed from the new scheme.  Also, make object types more
consistent and remove spaces from object types that contain
multiple parts ("posix_sem" -> "posixsem") to make mechanical
parsing easier.  Introduce a new "netinet" object type for
certain IPv4/IPv6-related methods.  Also simplify, slightly,
some entry point names.

All MAC policy modules will need to be recompiled, and modules
not updates as part of this commit will need to be modified to
conform to the new KPI.

Sponsored by:	SPARTA (original patches against Mac OS X)
Obtained from:	TrustedBSD Project, Apple Computer
2007-10-24 19:04:04 +00:00
Christian S.J. Peron
088b56a874 Use extended process token. The in kernel process audit
state is stored in an extended subject token now.  Make sure
that we are using the extended data.  This fixes the termID
for process tokens.

Obtained from:	TrustedBSD Project
Discussed with:	rwatson
MFC after:	1 week
2007-10-24 00:05:52 +00:00
Robert Watson
1cb99cfc25 Bump MAC_VERSION to 4 and add an 8.x line in the version table. Version 4
will include significant synchronization to the Mac OS X Leopard version
of the MAC Framework.

Obtained from:	TrustedBSD Project
2007-10-23 14:12:16 +00:00
Robert Watson
fe09513e7d Canonicalize naming of local variables for struct ksem and associated
labels to 'ks' and 'kslabel' to reflect the convention in posix_sem.c.

MFC after:	3 days
Obtained from:	TrustedBSD Project
2007-10-21 11:11:07 +00:00
Julian Elischer
3745c395ec Rename the kthread_xxx (e.g. kthread_create()) calls
to kproc_xxx as they actually make whole processes.
Thos makes way for us to add REAL kthread_create() and friends
that actually make theads. it turns out that most of these
calls actually end up being moved back to the thread version
when it's added. but we need to make this cosmetic change first.

I'd LOVE to do this rename in 7.0  so that we can eventually MFC the
new kthread_xxx() calls.
2007-10-20 23:23:23 +00:00
Christian S.J. Peron
24f4142c18 - Change the wakeup logic associated with having multiple sleepers
on multiple different audit pipes.  The old method used cv_signal()
  which would result in only one thread being woken up after we
  appended a record to it's queue.  This resulted in un-timely wake-ups
  when processing audit records real-time.

- Assign PSOCK priority to threads that have been sleeping on a read(2).
  This is the same priority threads are woken up with when they select(2)
  or poll(2).  This yields fairness between various forms of sleep on
  the audit pipes.

Obtained from:	TrustedBSD Project
Discussed with:	rwatson
MFC after:	1 week
2007-10-12 15:09:02 +00:00
Jeff Roberson
b61ce5b0e6 - Move all of the PS_ flags into either p_flag or td_flags.
- p_sflag was mostly protected by PROC_LOCK rather than the PROC_SLOCK or
   previously the sched_lock.  These bugs have existed for some time.
 - Allow swapout to try each thread in a process individually and then
   swapin the whole process if any of these fail.  This allows us to move
   most scheduler related swap flags into td_flags.
 - Keep ki_sflag for backwards compat but change all in source tools to
   use the new and more correct location of P_INMEM.

Reported by:	pho
Reviewed by:	attilio, kib
Approved by:	re (kensmith)
2007-09-17 05:31:39 +00:00
Robert Watson
45e0f3d63d Rename mac_check_vnode_delete() MAC Framework and MAC Policy entry
point to mac_check_vnode_unlink(), reflecting UNIX naming conventions.

This is the first of several commits to synchronize the MAC Framework
in FreeBSD 7.0 with the MAC Framework as it will appear in Mac OS X
Leopard.

Reveiwed by:    csjp, Samy Bahra <sbahra at gwu dot edu>
Submitted by:   Jacques Vidrine <nectar at apple dot com>
Obtained from:  Apple Computer, Inc.
Sponsored by:   SPARTA, SPAWAR
Approved by:    re (bmah)
2007-09-10 00:00:18 +00:00
Robert Watson
0bf686c125 Remove the now-unused NET_{LOCK,UNLOCK,ASSERT}_GIANT() macros, which
previously conditionally acquired Giant based on debug.mpsafenet.  As that
has now been removed, they are no longer required.  Removing them
significantly simplifies error-handling in the socket layer, eliminated
quite a bit of unwinding of locking in error cases.

While here clean up the now unneeded opt_net.h, which previously was used
for the NET_WITH_GIANT kernel option.  Clean up some related gotos for
consistency.

Reviewed by:	bz, csjp
Tested by:	kris
Approved by:	re (kensmith)
2007-08-06 14:26:03 +00:00
Robert Watson
7bb9c8a05b When checking labels during a vnode link operation in MLS, use the file
vnode label for a check rather than the directory vnode label a second
time.

MFC after:	3 days
Submitted by:	Zhouyi ZHOU <zhouzhouyi at FreeBSD dot org>
Reviewed by:	csjp
Sponsored by:	Google Summer of Code 2007
Approved by:	re (bmah)
2007-07-23 13:28:54 +00:00
Robert Watson
458f818f47 In preparation for 7.0 privilege cleanup, clean up style:
- Sort copyrights by date.
- Re-wrap, and in some cases, fix comments.
- Fix tabbing, white space, remove extra blank lines.
- Remove commented out debugging printfs.

Approved by:	re (kensmith)
2007-07-05 13:16:04 +00:00
Peter Wemm
343cc83e1b Fix a bunch of warnings due to a missing forward declaration of a struct.
Approved by: re (rwatson)
2007-07-05 06:45:37 +00:00
Robert Watson
536b405093 Remove two boot printfs generated by Audit to announce it's presence,
and replace with software-testable sysctl node (security.audit) that
can be used to detect kernel audit support.

Obtained from:	TrustedBSD Project
Approved by:	re (kensmith)
2007-07-01 20:51:30 +00:00
Christian S.J. Peron
cac465aa7f - Add audit_arg_audinfo_addr() for auditing the arguments for setaudit_addr(2)
- In audit_bsm.c, make sure all the arguments: ARG_AUID, ARG_ASID, ARG_AMASK,
  and ARG_TERMID{_ADDR} are valid before auditing their arguments. (This is done
  for both setaudit and setaudit_addr.
- Audit the arguments passed to setaudit_addr(2)
- AF_INET6 does not equate to AU_IPv6. Change this in au_to_in_addr_ex() so the
  audit token is created with the correct type. This fixes the processing of the
  in_addr_ex token in users pace.
- Change the size of the token (as generated by the kernel) from 5*4 bytes to
  4*4 bytes (the correct size of an ip6 address)
- Correct regression from ucred work which resulted in getaudit() not returning
  E2BIG if the subject had an ip6 termid
- Correct slight regression in getaudit(2) which resulted in the size of a pointer
  being passed instead of the size of the structure. (This resulted in invalid
  auditinfo data being returned via getaudit(2))

Reviewed by:	rwatson
Approved by:	re@ (kensmith)
Obtained from:	TrustedBSD Project
MFC after:	1 month
2007-06-27 17:01:15 +00:00
Robert Watson
f1e8bf6dd4 Add a new MAC framework and policy entry point,
mpo_check_proc_setaudit_addr to be used when controlling use of
setaudit_addr(), rather than mpo_check_proc_setaudit(), which takes a
different argument type.

Reviewed by:	csjp
Approved by:	re (kensmith)
2007-06-26 14:14:01 +00:00
Robert Watson
f640bf4767 In setaudit_addr(), drop the process lock in error cases.
Submitted by:	Peter Holm <peter@holm.cc> (BugMaster)
2007-06-15 15:20:56 +00:00
Robert Watson
3805385e3d Spell statistics more correctly in comments. 2007-06-14 03:02:33 +00:00
Robert Watson
c2259ba44f Include priv.h to pick up suser(9) definitions, missed in an earlier
commit.

Warnings spotted by:	kris
2007-06-13 22:42:43 +00:00
Robert Watson
6a9a600b49 Close a very narrow race that might cause a trigger allocation to be
leaked if a trigger is delivered as the trigger device is closed.

Obtained from:	TrustedBSD Project
2007-06-13 21:17:23 +00:00
Robert Watson
32f9753cfb Eliminate now-unused SUSER_ALLOWJAIL arguments to priv_check_cred(); in
some cases, move to priv_check() if it was an operation on a thread and
no other flags were present.

Eliminate caller-side jail exception checking (also now-unused); jail
privilege exception code now goes solely in kern_jail.c.

We can't yet eliminate suser() due to some cases in the KAME code where
a privilege check is performed and then used in many different deferred
paths.  Do, however, move those prototypes to priv.h.

Reviewed by:	csjp
Obtained from:	TrustedBSD Project
2007-06-12 00:12:01 +00:00
Robert Watson
3666798f15 Clean up, and sometimes remove, a number of audit-related implementation
comments.

Obtained from:	TrutstedBSD Project
2007-06-11 22:10:54 +00:00
Robert Watson
faef53711b Move per-process audit state from a pointer in the proc structure to
embedded storage in struct ucred.  This allows audit state to be cached
with the thread, avoiding locking operations with each system call, and
makes it available in asynchronous execution contexts, such as deep in
the network stack or VFS.

Reviewed by:	csjp
Approved by:	re (kensmith)
Obtained from:	TrustedBSD Project
2007-06-07 22:27:15 +00:00