linux-kernel - Re: [PATCH -mm 1/4] LSM: Introduce inode_getsecid and ipc

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Date:	Wed, 27 Feb 2008 18:45:35 +0200
From:	"Ahmed S. Darwish" <darwish.07@...il.com>
To:	Paul Moore <paul.moore@...com>
Cc:	Chris Wright <chrisw@...s-sol.org>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>,
	Casey Schaufler <casey@...aufler-ca.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-security-module@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH -mm 1/4] LSM: Introduce inode_getsecid and ipc_getsecid
	hooks

Hi Paul,

On Wed, Feb 27, 2008 at 11:04:57AM -0500, Paul Moore wrote:
> On Tuesday 26 February 2008 6:24:11 pm Ahmed S. Darwish wrote:
> > Introduce inode_getsecid(inode, secid) and ipc_getsecid(ipcp, secid)
> > LSM hooks.
> >
> > This hooks will be used instead of similar exported SELinux
> > interfaces.
> >
> > Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
> > Signed-off-by: Ahmed S. Darwish <darwish.07@...il.com>
> > ---
> >
> >  include/linux/security.h |   18 ++++++++++++++++++
> >  security/dummy.c         |   12 ++++++++++++
> >  security/security.c      |   12 ++++++++++++
> >  3 files changed, 42 insertions(+)
> >
...
> ...
> 
> > +static inline void security_ipc_getsecid(struct kern_ipc_perm *ipcp,
> > u32 *secid)
> > +{ } 
> 
> Should these both do a  "*secid = 0;"?
> 

Yes, this will also lead to consistency in the interface espcially 
after changing task_getsecid to do the same (in patch #3).

> > diff --git a/security/dummy.c b/security/dummy.c
> > index 6a0056b..c2f4c52 100644
> > --- a/security/dummy.c
> > +++ b/security/dummy.c
> > @@ -422,6 +422,11 @@ static int dummy_inode_listsecurity(struct inode
> > *inode, char *buffer, size_t bu return 0;
> >  }
> >
> > +static void dummy_inode_getsecid(const struct inode *inode, u32
> > *secid)
> > +{ 
> > +	return;
> > +}
> 
> ...
> 
> > +static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32
> > *secid)
> > +{ 
> > +	return;
> > +}
> 
> Same question.
> 

Both will be changed to *secid = 0 in the comming send. Thanks!

-- 

"Better to light a candle, than curse the darkness"

Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com

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