Commit Graph

85 Commits

Author SHA1 Message Date
Paul Moore 45c950e0f8 selinux: fix memory leak in netlabel code
Fix a memory leak in security_netlbl_sid_to_secattr() as reported here:
 * https://bugzilla.redhat.com/show_bug.cgi?id=352281

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2008-01-22 09:31:00 +11:00
Stephen Smalley 45e5421eb5 SELinux: add more validity checks on policy load
Add more validity checks at policy load time to reject malformed
policies and prevent subsequent out-of-range indexing when in permissive
mode.  Resolves the NULL pointer dereference reported in
https://bugzilla.redhat.com/show_bug.cgi?id=357541.

Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-11-08 08:56:23 +11:00
KaiGai Kohei 6d2b685564 SELinux: fix bug in new ebitmap code.
The "e_iter = e_iter->next;" statement in the inner for loop is primally
bug.  It should be moved to outside of the for loop.

Signed-off-by: KaiGai Kohei <kaigai@kaigai.gr.jp>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-11-08 08:55:10 +11:00
KaiGai Kohei 087feb9804 SELinux: kills warnings in Improve SELinux performance when AVC misses
This patch kills ugly warnings when the "Improve SELinux performance
when ACV misses" patch.

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-10-17 08:59:36 +10:00
KaiGai Kohei 9fe79ad1e4 SELinux: improve performance when AVC misses.
* We add ebitmap_for_each_positive_bit() which enables to walk on
  any positive bit on the given ebitmap, to improve its performance
  using common bit-operations defined in linux/bitops.h.
  In the previous version, this logic was implemented using a combination
  of ebitmap_for_each_bit() and ebitmap_node_get_bit(), but is was worse
  in performance aspect.
  This logic is most frequestly used to compute a new AVC entry,
  so this patch can improve SELinux performance when AVC misses are happen.
* struct ebitmap_node is redefined as an array of "unsigned long", to get
  suitable for using find_next_bit() which is fasted than iteration of
  shift and logical operation, and to maximize memory usage allocated
  from general purpose slab.
* Any ebitmap_for_each_bit() are repleced by the new implementation
  in ss/service.c and ss/mls.c. Some of related implementation are
  changed, however, there is no incompatibility with the previous
  version.
* The width of any new line are less or equal than 80-chars.

The following benchmark shows the effect of this patch, when we
access many files which have different security context one after
another. The number is more than /selinux/avc/cache_threshold, so
any access always causes AVC misses.

      selinux-2.6      selinux-2.6-ebitmap
AVG:   22.763 [s]          8.750 [s]
STD:    0.265              0.019
------------------------------------------
1st:   22.558 [s]          8.786 [s]
2nd:   22.458 [s]          8.750 [s]
3rd:   22.478 [s]          8.754 [s]
4th:   22.724 [s]          8.745 [s]
5th:   22.918 [s]          8.748 [s]
6th:   22.905 [s]          8.764 [s]
7th:   23.238 [s]          8.726 [s]
8th:   22.822 [s]          8.729 [s]

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-10-17 08:59:34 +10:00
Eric Paris 3f12070e27 SELinux: policy selectable handling of unknown classes and perms
Allow policy to select, in much the same way as it selects MLS support, how
the kernel should handle access decisions which contain either unknown
classes or unknown permissions in known classes.  The three choices for the
policy flags are

0 - Deny unknown security access. (default)
2 - reject loading policy if it does not contain all definitions
4 - allow unknown security access

The policy's choice is exported through 2 booleans in
selinuxfs.  /selinux/deny_unknown and /selinux/reject_unknown.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-10-17 08:59:33 +10:00
Yuichi Nakamura 3232c110b5 SELinux: tune avtab to reduce memory usage
This patch reduces memory usage of SELinux by tuning avtab. Number of hash
slots in avtab was 32768. Unused slots used memory when number of rules is
fewer. This patch decides number of hash slots dynamically based on number
of rules. (chain length)^2 is also printed out in avtab_hash_eval to see
standard deviation of avtab hash table.

Signed-off-by: Yuichi Nakamura<ynakam@hitachisoft.jp>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-10-17 08:59:30 +10:00
Steve G 3ad40d647d SELinux: correct error code in selinux_audit_rule_init
Corrects an error code so that it is valid to pass to userspace.

Signed-off-by: Steve Grubb <linux_4ever@yahoo.com>
Signed-off-by: James Morris <jmorris@halo.namei>
2007-08-16 11:42:28 -04:00
Gabriel Craciunescu d133a9609e Typo fixes errror -> error
Typo fixes errror -> error

Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-31 15:39:42 -07:00
Jesper Juhl 0ec8abd708 SELinux: fix memory leak in security_netlbl_cache_add()
Fix memory leak in security_netlbl_cache_add()
Note: The Coverity checker gets credit for spotting this one.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
2007-07-23 09:35:37 -04:00
Paul Mundt 20c2df83d2 mm: Remove slab destructors from kmem_cache_create().
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +09:00
Stephen Smalley 2c3c05dbcb SELinux: allow preemption between transition permission checks
In security_get_user_sids, move the transition permission checks
outside of the section holding the policy rdlock, and use the AVC to
perform the checks, calling cond_resched after each one.  These
changes should allow preemption between the individual checks and
enable caching of the results.  It may however increase the overall
time spent in the function in some cases, particularly in the cache
miss case.

The long term fix will be to take much of this logic to userspace by
exporting additional state via selinuxfs, and ultimately deprecating
and eliminating this interface from the kernel.

Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-07-11 22:52:25 -04:00
Eric Paris 9dc9978084 selinux: introduce schedule points in policydb_destroy()
During the LSPP testing we found that it was possible for
policydb_destroy() to take 10+ seconds of kernel time to complete.
Basically all policydb_destroy() does is walk some (possibly long) lists
and free the memory it finds.  Turning off slab debugging config options
made the problem go away since the actual functions which took most of
the time were (as seen by oprofile)

> 121202   23.9879  .check_poison_obj
> 78247    15.4864  .check_slabp

were caused by that.  So I decided to also add some voluntary schedule
points in that code so config voluntary preempt would be enough to solve
the problem.  Something similar was done in places like
shmem_free_pages() when we have to walk a list of memory and free it.
This was tested by the LSPP group on the hardware which could reproduce
the problem just loading a new policy and was found to not trigger the
softlock detector.  It takes just as much processing time, but the
kernel doesn't spend all that time stuck doing one thing and never
scheduling.

Someday a better way to handle memory might make the time needed in this
function a lot less, but this fixes the current issue as it stands
today.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-07-11 22:52:23 -04:00
Christopher J. PeBenito 55fcf09b3f selinux: add support for querying object classes and permissions from the running policy
Add support to the SELinux security server for obtaining a list of classes,
and for obtaining a list of permissions for a specified class.

Signed-off-by: Christopher J. PeBenito <cpebenito@tresys.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-07-11 22:52:15 -04:00
Stephen Smalley e900a7d90a selinux: preserve boolean values across policy reloads
At present, the userland policy loading code has to go through contortions to preserve
boolean values across policy reloads, and cannot do so atomically.
As this is what we always want to do for reloads, let the kernel preserve them instead.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Karl MacMillan <kmacmillan@mentalrootkit.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:36:13 -04:00
James Carter f0ee2e467f selinux: export initial SID contexts via selinuxfs
Make the initial SID contexts accessible to userspace via selinuxfs.
An initial use of this support will be to make the unlabeled context
available to libselinux for use for invalidated userspace SIDs.

Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:36:00 -04:00
Stephen Smalley a764ae4b07 selinux: remove userland security class and permission definitions
Remove userland security class and permission definitions from the kernel
as the kernel only needs to use and validate its own class and permission
definitions and userland definitions may change.

Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:35:58 -04:00
Paul Moore 4f6a993f96 SELinux: move security_skb_extlbl_sid() out of the security server
As suggested, move the security_skb_extlbl_sid() function out of the security
server and into the SELinux hooks file.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:35:56 -04:00
Paul Moore c60475bf35 SELinux: rename selinux_netlabel.h to netlabel.h
In the beginning I named the file selinux_netlabel.h to avoid potential
namespace colisions.  However, over time I have realized that there are several
other similar cases of multiple header files with the same name so I'm changing
the name to something which better fits with existing naming conventions.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:35:50 -04:00
Paul Moore 5778eabd9c SELinux: extract the NetLabel SELinux support from the security server
Up until this patch the functions which have provided NetLabel support to
SELinux have been integrated into the SELinux security server, which for
various reasons is not really ideal.  This patch makes an effort to extract as
much of the NetLabel support from the security server as possibile and move it
into it's own file within the SELinux directory structure.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-04-26 01:35:48 -04:00
Stephen Smalley 4f4acf3a47 Always initialize scontext and scontext_len
Always initialize *scontext and *scontext_len in security_sid_to_context.

(via http://lkml.org/lkml/2007/2/23/135)

Signed-off-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-02-26 14:43:15 -05:00
Eric Paris fadcdb4516 Reassign printk levels in selinux kernel code
Below is a patch which demotes many printk lines to KERN_DEBUG from
KERN_INFO.  It should help stop the spamming of logs with messages in
which users are not interested nor is there any action that users should
take.  It also promotes some KERN_INFO to KERN_ERR such as when there
are improper attempts to register/unregister security modules.

A similar patch was discussed a while back on list:
http://marc.theaimsgroup.com/?t=116656343500003&r=1&w=2
This patch addresses almost all of the issues raised.  I believe the
only advice not taken was in the demoting of messages related to
undefined permissions and classes.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>

 security/selinux/hooks.c       |   20 ++++++++++----------
 security/selinux/ss/avtab.c    |    2 +-
 security/selinux/ss/policydb.c |    6 +++---
 security/selinux/ss/sidtab.c   |    2 +-
 4 files changed, 15 insertions(+), 15 deletions(-)
Signed-off-by: James Morris <jmorris@namei.org>
2007-02-26 14:43:07 -05:00
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00
Robert P. J. Day c376222960 [PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc().
Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the
corresponding "kmem_cache_zalloc()" call.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Roland McGrath <roland@redhat.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Greg KH <greg@kroah.com>
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Jan Kara <jack@ucw.cz>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:27 -08:00
Venkat Yekkirala 342a0cff0a [SELINUX]: Fix 2.6.20-rc6 build when no xfrm
This patch is an incremental fix to the flow_cache_genid
patch for selinux that breaks the build of 2.6.20-rc6 when
xfrm is not configured.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-01-26 19:03:48 -08:00
Venkat Yekkirala 334c85569b [SELINUX]: increment flow cache genid
Currently, old flow cache entries remain valid even after
a reload of SELinux policy.

This patch increments the flow cache generation id
on policy (re)loads so that flow cache entries are
revalidated as needed.

Thanks to Herbet Xu for pointing this out. See:
http://marc.theaimsgroup.com/?l=linux-netdev&m=116841378704536&w=2

There's also a general issue as well as a solution proposed
by David Miller for when flow_cache_genid wraps. I might be
submitting a separate patch for that later.

I request that this be applied to 2.6.20 since it's
a security relevant fix.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-01-23 20:25:41 -08:00
Paul Moore 7979512006 NetLabel: correct locking in selinux_netlbl_socket_setsid()
The spinlock protecting the update of the "sksec->nlbl_state" variable is not
currently softirq safe which can lead to problems.  This patch fixes this by
changing the spin_{un}lock() functions into spin_{un}lock_bh() functions.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2007-01-09 00:30:00 -08:00
Venkat Yekkirala 0efc61eaee selinux: Delete mls_copy_context
This deletes mls_copy_context() in favor of mls_context_cpy() and
replaces mls_scopy_context() with mls_context_cpy_low().

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2007-01-08 17:32:51 -05:00
Parag Warudkar 9883a13c72 [PATCH] selinux: fix selinux_netlbl_inode_permission() locking
do not call a sleeping lock API in an RCU read section.
lock_sock_nested can sleep, its BH counterpart doesn't.
selinux_netlbl_inode_permission() needs to use the BH counterpart
unconditionally.

Compile tested.

From: Ingo Molnar <mingo@elte.hu>

added BH disabling, because this function can be called from non-atomic
contexts too, so a naked bh_lock_sock() would be deadlock-prone.

Boot-tested the resulting kernel.

Signed-off-by: Parag Warudkar <paragw@paragw.zapto.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-02 13:32:21 -08:00
Christoph Lameter e18b890bb0 [PATCH] slab: remove kmem_cache_t
Replace all uses of kmem_cache_t with struct kmem_cache.

The patch was generated using the following script:

	#!/bin/sh
	#
	# Replace one string by another in all the kernel sources.
	#

	set -e

	for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do
		quilt add $file
		sed -e "1,\$s/$1/$2/g" $file >/tmp/$$
		mv /tmp/$$ $file
		quilt refresh
	done

The script was run like this

	sh replace kmem_cache_t "struct kmem_cache"

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:25 -08:00
Christoph Lameter e94b176609 [PATCH] slab: remove SLAB_KERNEL
SLAB_KERNEL is an alias of GFP_KERNEL.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:24 -08:00
James Morris 6cbda6b6e2 Rename class_destroy to avoid namespace conflicts.
We're seeing increasing namespace conflicts between the global
class_destroy() function declared in linux/device.h, and the private
function in the SELinux core code.  This patch renames the SELinux
function to cls_destroy() to avoid this conflict.

Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2006-12-02 21:31:39 -08:00
Paul Moore 0275276035 NetLabel: convert to an extensibile/sparse category bitmap
The original NetLabel category bitmap was a straight char bitmap which worked
fine for the initial release as it only supported 240 bits due to limitations
in the CIPSO restricted bitmap tag (tag type 0x01).  This patch converts that
straight char bitmap into an extensibile/sparse bitmap in order to lay the
foundation for other CIPSO tag types and protocols.

This patch also has a nice side effect in that all of the security attributes
passed by NetLabel into the LSM are now in a format which is in the host's
native byte/bit ordering which makes the LSM specific code much simpler; look
at the changes in security/selinux/ss/ebitmap.c as an example.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-12-02 21:31:36 -08:00
Paul Moore 3de4bab5b9 SELinux: peer secid consolidation for external network labeling
Now that labeled IPsec makes use of the peer_sid field in the
sk_security_struct we can remove a lot of the special cases between labeled
IPsec and NetLabel.  In addition, create a new function,
security_skb_extlbl_sid(), which we can use in several places to get the
security context of the packet's external label which allows us to further
simplify the code in a few places.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-12-02 21:24:14 -08:00
Paul Moore 9f2ad66509 NetLabel: SELinux cleanups
This patch does a lot of cleanup in the SELinux NetLabel support code.  A
summary of the changes include:

* Use RCU locking for the NetLabel state variable in the skk_security_struct
  instead of using the inode_security_struct mutex.
* Remove unnecessary parameters in selinux_netlbl_socket_post_create().
* Rename selinux_netlbl_sk_clone_security() to
  selinux_netlbl_sk_security_clone() to better fit the other NetLabel
  sk_security functions.
* Improvements to selinux_netlbl_inode_permission() to help reduce the cost of
  the common case.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-12-02 21:24:13 -08:00
Paul Moore 701a90bad9 NetLabel: make netlbl_lsm_secattr struct easier/quicker to understand
The existing netlbl_lsm_secattr struct required the LSM to check all of the
fields to determine if any security attributes were present resulting in a lot
of work in the common case of no attributes.  This patch adds a 'flags' field
which is used to indicate which attributes are present in the structure; this
should allow the LSM to do a quick comparison to determine if the structure
holds any security attributes.

Example:

 if (netlbl_lsm_secattr->flags)
	/* security attributes present */
 else
	/* NO security attributes present */

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-12-02 21:24:07 -08:00
Chad Sellers b94c7e677b SELinux: validate kernel object classes and permissions
This is a new object class and permission validation scheme that validates
against the defined kernel headers. This scheme allows extra classes
and permissions that do not conflict with the kernel definitions to be
added to the policy. This validation is now done for all policy loads,
not just subsequent loads after the first policy load.

The implementation walks the three structrures containing the defined
object class and permission values and ensures their values are the
same in the policy being loaded. This includes verifying the object
classes themselves, the permissions they contain, and the permissions
they inherit from commons. Classes or permissions that are present in the
kernel but missing from the policy cause a warning (printed to KERN_INFO)
to be printed, but do not stop the policy from loading, emulating current
behavior. Any other inconsistencies cause the load to fail.

Signed-off-by: Chad Sellers <csellers@tresys.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2006-11-28 12:04:38 -05:00
Chad Sellers bb24249747 SELinux: ensure keys constant in hashtab_search
Makes the key argument passed into hashtab_search and all the functions
it calls constant. These functions include hash table function pointers
hash_value and keycmp. The only implementations of these currently
are symhash and symcmp, which do not modify the key. The key parameter
should never be changed by any of these, so it should be const. This
is necessary to allow calling these functions with keys found in kernel
object class and permission definitions.

Signed-off-by: Chad Sellers <csellers@tresys.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2006-11-28 12:04:37 -05:00
Chad Sellers 5a64d4438e SELinux: remove current object class and permission validation mechanism
Removes the current SELinux object class and permission validation code,
as the current code makes it impossible to change or remove object classes
and permissions on a running system. Additionally, the current code does
not actually validate that the classes and permissions are correct, but
instead merely validates that they do not change between policy reloads.

Signed-off-by: Chad Sellers <csellers@tresys.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2006-11-28 12:04:35 -05:00
Paul Moore f8687afefc [NetLabel]: protect the CIPSOv4 socket option from setsockopt()
This patch makes two changes to protect applications from either removing or
tampering with the CIPSOv4 IP option on a socket.  The first is the requirement
that applications have the CAP_NET_RAW capability to set an IPOPT_CIPSO option
on a socket; this prevents untrusted applications from setting their own
CIPSOv4 security attributes on the packets they send.  The second change is to
SELinux and it prevents applications from setting any IPv4 options when there
is an IPOPT_CIPSO option already present on the socket; this prevents
applications from removing CIPSOv4 security attributes from the packets they
send.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-10-30 15:24:49 -08:00
Paul Moore bf0edf3929 NetLabel: better error handling involving mls_export_cat()
Upon inspection it looked like the error handling for mls_export_cat() was
rather poor.  This patch addresses this by NULL'ing out kfree()'d pointers
before returning and checking the return value of the function everywhere
it is called.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-10-15 23:14:15 -07:00
Chad Sellers 6e8c751e07 SELinux: Bug fix in polidydb_destroy
This patch fixes two bugs in policydb_destroy. Two list pointers
(policydb.ocontexts[i] and policydb.genfs) were not being reset to NULL when
the lists they pointed to were being freed. This caused a problem when the
initial policy load failed, as the policydb being destroyed was not a
temporary new policydb that was thrown away, but rather was the global
(active) policydb. Consequently, later functions, particularly
sys_bind->selinux_socket_bind->security_node_sid and
do_rw_proc->selinux_sysctl->selinux_proc_get_sid->security_genfs_sid tried
to dereference memory that had previously been freed.

Signed-off-by: Chad Sellers <csellers@tresys.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-10-11 23:59:41 -07:00
paul.moore@hp.com 388b24057f NetLabel: use SECINITSID_UNLABELED for a base SID
This patch changes NetLabel to use SECINITSID_UNLABLELED as it's source of
SELinux type information when generating a NetLabel context.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-10-11 23:59:32 -07:00
paul.moore@hp.com ffb733c650 NetLabel: fix a cache race condition
Testing revealed a problem with the NetLabel cache where a cached entry could
be freed while in use by the LSM layer causing an oops and other problems.
This patch fixes that problem by introducing a reference counter to the cache
entry so that it is only freed when it is no longer in use.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
2006-10-11 23:59:29 -07:00
Eric Paris 2397074172 [PATCH] SELinux: change isec semaphore to a mutex
This patch converts the remaining isec->sem into a mutex.  Very similar
locking is provided as before only in the faster smaller mutex rather than a
semaphore.  An out_unlock path is introduced rather than the conditional
unlocking found in the original code.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-26 08:48:53 -07:00
Darrel Goeddel f3f8771420 [PATCH] selinux: add support for range transitions on object classes
Introduces support for policy version 21.  This version of the binary
kernel policy allows for defining range transitions on security classes
other than the process security class.  As always, backwards compatibility
for older formats is retained.  The security class is read in as specified
when using the new format, while the "process" security class is assumed
when using an older policy format.

Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-26 08:48:52 -07:00
Stephen Smalley 9a2f44f01a [PATCH] selinux: replace ctxid with sid in selinux_audit_rule_match interface
Replace ctxid with sid in selinux_audit_rule_match interface for
consistency with other interfaces.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-26 08:48:52 -07:00
Paul Moore df2115c313 [NetLabel]: change the SELinux permissions
Change NetLabel to use the 'recvfrom' socket permission and the
SECINITSID_NETMSG SELinux SID as the NetLabel base SID for incoming packets.
This patch effectively makes the old, and currently unused, SELinux NETMSG
permissions NetLabel permissions.

Signed-of-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-25 15:53:13 -07:00
Paul Moore 14a72f53fb [NetLabel]: correct improper handling of non-NetLabel peer contexts
Fix a problem where NetLabel would always set the value of 
sk_security_struct->peer_sid in selinux_netlbl_sock_graft() to the context of
the socket, causing problems when users would query the context of the
connection.  This patch fixes this so that the value in
sk_security_struct->peer_sid is only set when the connection is NetLabel based,
otherwise the value is untouched.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-25 15:52:01 -07:00
Venkat Yekkirala 4eb327b517 [SELINUX]: Fix bug in security_sid_mls_copy
The following fixes a bug where random mem is being tampered with in the
non-mls case; encountered by Jashua Brindle on a gentoo box.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
2006-09-22 15:19:04 -07:00