linux-toradex.git/net/netlabel, branch v2.6.20.7

NetLabel: correct CIPSO tag handling when adding new DOI definitions

2007-01-09T08:30:01+00:00

The current netlbl_cipsov4_add_common() function has two problems which are
fixed with this patch.  The first is an off-by-one bug where it is possibile to
overflow the doi_def->tags[] array.  The second is a bug where the same
doi_def->tags[] array was not always fully initialized, which caused sporadic
failures.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

NetLabel: correctly fill in unused CIPSOv4 level and category mappings

2006-12-22T19:11:58+00:00

Back when the original NetLabel patches were being changed to use Netlink
attributes correctly some code was accidentially dropped which set all of the
undefined CIPSOv4 level and category mappings to a sentinel value.  The result
is the mappings data in the kernel contains bogus mappings which always map to
zero.  This patch restores the old/correct behavior by initializing the mapping
data to the correct sentinel value.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

NetLabel: perform input validation earlier on CIPSOv4 DOI add ops

2006-12-22T19:11:56+00:00

There are a couple of cases where the user input for a CIPSOv4 DOI add
operation was not being done soon enough; the result was unexpected behavior
which was resulting in oops/panics/lockups on some platforms.  This patch moves
the existing input validation code earlier in the code path to protect against
bogus user input.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

NetLabel: convert to an extensibile/sparse category bitmap

2006-12-03T05:31:36+00:00

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 
Signed-off-by: James Morris

NetLabel: honor the audit_enabled flag

2006-12-03T05:24:15+00:00

The audit_enabled flag is used to signal when syscall auditing is to be
performed.  While NetLabel uses a Netlink interface instead of syscalls, it is
reasonable to consider the NetLabel Netlink interface as a form of syscall so
pay attention to the audit_enabled flag when generating audit messages in
NetLabel.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

NetLabel: check for a CIPSOv4 option before we do call into the CIPSOv4 layer

2006-12-03T05:24:08+00:00

Right now the NetLabel code always jumps into the CIPSOv4 layer to determine if
a CIPSO IP option is present.  However, we can do this check directly in the
NetLabel code by making use of the CIPSO_V4_OPTEXIST() macro which should save
us a function call in the common case of not having a CIPSOv4 option present.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

NetLabel: make netlbl_lsm_secattr struct easier/quicker to understand

2006-12-03T05:24:07+00:00

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 
Signed-off-by: James Morris

NetLabel: convert the unlabeled accept flag to use RCU

2006-12-03T05:24:05+00:00

Currently the NetLabel unlabeled packet accept flag is an atomic type and it
is checked for every non-NetLabel packet which comes into the system but rarely
ever changed.  This patch changes this flag to a normal integer and protects it
with RCU locking.

Signed-off-by: Paul Moore 
Signed-off-by: James Morris

[GENL]: Add genlmsg_put_reply() to simplify building reply headers

2006-12-03T05:22:42+00:00

By modyfing genlmsg_put() to take a genl_family and by adding
genlmsg_put_reply() the process of constructing the netlink
and generic netlink headers is simplified.

Signed-off-by: Thomas Graf 
Acked-by: Paul Moore 
Signed-off-by: David S. Miller

[GENL]: Add genlmsg_reply() to simply unicast replies to requests

2006-12-03T05:22:41+00:00

A generic netlink user has no interest in knowing how to
address the source of the original request.

Signed-off-by: Thomas Graf 
Acked-by: Paul Moore 
Signed-off-by: David S. Miller