Re: bizarre packet labelings
On Wed, 2009-06-17 at 14:21 -0700, brian retford wrote:
2.6.18, with some custom kernel modules -- there is an off chance
that
they are interacting, but I doubt it.
Well, you have some kind of kernel bug, whether it lies in those custom
kernel modules or elsewhere I don't know. Obviously removing those
custom kernel modules and re-testing would help eliminate them as
possible causes.
-b
On Wed, Jun 17, 2009 at 12:47 PM, Stephen Smalley <sds(a)tycho.nsa.gov>
wrote:
On Wed, 2009-06-17 at 10:18 -0700, brian retford wrote:
> We have a fairly customized centos 5.3 distribution, but I
know of
> nothing that would cause the behavior I'm seeing. We don't
use
> iptables or ipsec, secmark is enabled in the kernel. I get
avc denied
> messages for packets that almost certainly do exist, but the
targets
> almost never make sense (at least to me), things like
ls_exec_t,
> lib_t, and other seemingly random types. Thoughts?
>
> avc: denied { send } for pid=3202 comm="sshd"
saddr=172.27.13.41
> src=22 daddr=172.27.134.1 dest=40428 netif=eth0
> scontext=system_u:system_r:unconfined_t:s0-s0:c0.c1023
> tcontext=system_u:object_r:lib_t:s0 tclass=packet
If you haven't configured iptables to mark packets with those
contexts,
then you shouldn't get any such denials.
So either you have a weird iptables configuration or you have
a kernel
bug.
What kernel are you using?
--
Stephen Smalley
National Security Agency
--
Stephen Smalley
National Security Agency