get_field_str() and interpret_field() bug with multi-word fields

[Matteo Michelini]

I'm working on a binary format for the linux-audit system as part of a
university research project.

The goal is having something similar to BSM trails.
What do you think about it?

2008/8/14, Stephen Smalley <sds at tycho.nsa.gov>:
>
> On Wed, 2008-08-13 at 13:25 -0300, Klaus Heinrich Kiwi wrote:
>> On Wed, 2008-08-13 at 11:09 -0400, Eric Paris wrote:
>> > HAHAHA, kernel output xml?  dream on   :)   I'm willing to do
>> > wholesale
>> > output changes, but something that heavy in kernel is impossible to
>> > push.  I can just see Al cussing up a storm as he read that.
>>
>> That's exactly my point. There's no sense in discussing a 'ideal' format
>> for audit stream coming out of the kernel, since it's well agreed
>> (thankfully) that the kernel part should be as minimal as possible.
>>
>> I like Mathew's idea of having a binary format though. Maybe it's
>> possible to carry the legacy format for some time while we have a more
>> robust (and extensible) binary format in parallel? And then having a
>> binary format version tag within each record?
>>
>> I know I know, at the time I have more questions than answers. I only
>> wanted to express my feeling that there is indeed a problem with the
>> current format.
>>
>> I know you and Steve tried before to talk with the SELinux guys trying
>> to have a saner format for AVCs and stuff. Do you feel that's an
>> impossible barrier to cross or maybe we try again and convince them that
>> stricter formatting rules will bring more users for their audit data?
>
> If you want to ask the "SELinux guys", ask on the selinux at tycho.nsa.gov
> list.  But in this case:  we've always been willing to take changes to
> the AVC audit format; we have merely pointed out that it has to be done
> in a way that provides full backward compatibility both in kernel and in
> the userland, as we are not allowed to break existing userland with new
> kernel and we'd like new userland to still work on old kernels.  Patches
> that meet those standards accepted.
>
> --
> Stephen Smalley
> National Security Agency
>
> --
> Linux-audit mailing list
> Linux-audit at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-audit
>


-- 
Matteo Michelini (Milan - Italy)
http://www.michelini.co.uk
Linux registered user: #332873