linux-kernel - Re: [PATCH] NetLabel: Introduce a new kernel configuration API for NetLabel - For 2.6.24-rc-git11

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Message-ID: <399501.53617.qm@web36612.mail.mud.yahoo.com>
Date:	Tue, 6 Nov 2007 19:21:17 -0800 (PST)
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	casey@...aufler-ca.com, Joshua Brindle <method@...icmethod.com>
Cc:	akpm@...l.org, torvalds@...l.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, paul.moore@...com
Subject: Re: [PATCH] NetLabel: Introduce a new kernel configuration API for NetLabel - For 2.6.24-rc-git11 - Smack Version 10


--- Casey Schaufler <casey@...aufler-ca.com> wrote:

> 
> --- Joshua Brindle <method@...icmethod.com> wrote:
> 
> > Joshua Brindle wrote:
> > > Casey Schaufler wrote:
> > >> From: Paul Moore <paul.moore@...com>
> > >>
> > >> Add a new set of configuration functions to the NetLabel/LSM API so that
> > >> LSMs can perform their own configuration of the NetLabel subsystem 
> > >> without
> > >> relying on assistance from userspace.
> > >>   
> > > I'm still not receiving the actual patch email on lsm (perhaps its too 
> > > long and should be split up..) so I'll just respond on this email. 
> > > Using the v10 patches on your website I'm still seeing strange 
> > > behavior where echo foo > /proc/self/attr/current changes the label of 
> > > every process on the system to foo (verified with both ps -AZ and cat 
> > > /proc/1/attr/current).
> > >
> > Actually I'm getting more strange behavior:
> > 
> > On terminal 1 I do:
> > echo foo > /proc/self/attr/current
> > then ps -AZ shows foo for every process
> > touch somefile; attr -S -g SMACK64 somefile says foo
> > 
> > On terminal 2 I do:
> > ps -AZ and everything shows up as _
> > cat /proc/$pid of bash on term 1/attr/current is _
> 
> Now this I can explain. Every task has it's own correct
> label. The problem is a missing smack_getprocattr() hook.
> ps is getting the value for "current" on the current process,
> not that of the named process. Interestingly, the Smack label
> of /proc/<xxx>/attr/current is correct.

That's what I get for responding too quickly. There is a
smack_getprocattr() hook, it's just wrong. Fixed for the
next version. 

Thank you again. 


Casey Schaufler
casey@...aufler-ca.com
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