One more update on the 2.6.25 labeled networking patchset. As usual, these
changes can also be found in git form here:
* git://git.infradead.org/users/pcmoore/lblnet-2.6_testing
This revision fixes a problem with the sk_buff's 'iif' field not being copied
during a clone operation. Thanks to
The NetLabel/LSM domain hash table search function used an argument to specify
if the default entry should be returned if an exact match couldn't be found in
the hash table. This is a bit against the kernel's style so make two separate
functions to represent the separate behaviors.
Currently we use two separate spinlocks to protect both the hash/mapping table
and the default entry. This could be considered a bit foolish because it adds
complexity without offering any real performance advantage. This patch
removes the dedicated default spinlock and protects the default
This patch adds support to the NetLabel LSM secattr struct for a secid token
and a type field, paving the way for full LSM/SELinux context support and
static or fallback labels. In addition, this patch adds a fair amount
of documentation to the core NetLabel structures used as part of the
Add a secctx_to_secid() LSM hook to go along with the existing
secid_to_secctx() LSM hook. This patch also includes the SELinux
implementation for this hook.
Signed-off-by: Paul Moore [EMAIL PROTECTED]
Acked-by: Stephen Smalley [EMAIL PROTECTED]
---
include/linux/security.h | 13
Add an inet_sys_snd_skb() LSM hook to allow the LSM to provide packet level
access control for all outbound packets. Using the existing postroute_last
netfilter hook turns out to be problematic as it is can be invoked multiple
times for a single packet, e.g. individual IPsec transforms, adding
In order to do any sort of IP header inspection of incoming packets we need to
know which address family, AF_INET/AF_INET6/etc., it belongs to and since the
sk_buff structure does not store this information we need to pass along the
address family separate from the packet itself.
Signed-off-by:
Both NetLabel and SELinux (other LSMs may grow to use it as well) rely on the
'iif' field to determine the receiving network interface of inbound packets.
Unfortunately, at present this field is not preserved across a skb clone
operation which can lead to garbage values if the cloned skb is sent
Instead of storing the packet's network interface name store the ifindex. This
allows us to defer the need to lookup the net_device structure until the audit
record is generated meaning that in the majority of cases we never need to
bother with this at all.
Signed-off-by: Paul Moore [EMAIL
Add a new policy capabilities bitmap to SELinux policy version 22. This bitmap
will enable the security server to query the policy to determine which features
it supports.
Signed-off-by: Paul Moore [EMAIL PROTECTED]
---
security/selinux/Kconfig|2 -
Add additional Flask definitions to support the new peer object class and
additional permissions to the netif and node object classes.
Signed-off-by: Paul Moore [EMAIL PROTECTED]
---
security/selinux/include/av_perm_to_string.h |5 +
security/selinux/include/av_permissions.h|5
Rework the handling of network peer labels so that the different peer labeling
subsystems work better together. This includes moving both subsystems to a
single peer object class which involves not only changes to the permission
checks but an improved method of consolidating multiple packet peer
This patch introduces a mechanism for checking when labeled IPsec or SECMARK
are in use by keeping introducing a configuration reference counter for each
subsystem. In the case of labeled IPsec, whenever a labeled SA or SPD entry
is created the labeled IPsec/XFRM reference count is increased and
Most trusted OSs, with the exception of Linux, have the ability to specify
static security labels for unlabeled networks. This patch adds this ability to
the NetLabel packet labeling framework.
If the NetLabel subsystem is called to determine the security attributes of an
incoming packet it
Now that the SELinux NetLabel base SID is always the netmsg initial SID we
can do a big optimization - caching the SID and not just the MLS attributes.
This not only saves a lot of per-packet memory allocations and copies but it
has a nice side effect of removing a chunk of code.
Signed-off-by:
There is also the issue of compiled code which explicitly raises and
lowers capabilities around critical code sections (ie., as they were
intended to be used) is also not well served by this change.
That is, unless the code was compiled with things like CAP_MAC_ADMIN
being #define'd then it
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