[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20090730155403.GA13939@us.ibm.com>
Date: Thu, 30 Jul 2009 10:54:03 -0500
From: "Serge E. Hallyn" <serue@...ibm.com>
To: Eric Paris <eparis@...hat.com>
Cc: linux-kernel@...r.kernel.org,
linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
jwcart2@...ho.nsa.gov, sds@...ho.nsa.gov, spender@...ecurity.net,
dwalsh@...hat.com, cl@...ux-foundation.org, arjan@...radead.org,
alan@...rguk.ukuu.org.uk, kees@...flux.net, csellers@...sys.com,
penguin-kernel@...ove.sakura.ne.jp
Subject: Re: [PATCH -v3 1/3] Capabilities: move cap_file_mmap to commoncap.c
Quoting Eric Paris (eparis@...hat.com):
> On Thu, 2009-07-30 at 00:14 -0500, Serge E. Hallyn wrote:
> > Quoting Eric Paris (eparis@...hat.com):
> > > Currently we duplicate the mmap_min_addr test in cap_file_mmap and in
> > > security_file_mmap if !CONFIG_SECURITY. This patch moves cap_file_mmap
> > > into commoncap.c and then calls that function directly from
> > > security_file_mmap ifndef CONFIG_SECURITY like all of the other capability
> > > checks are done.
> >
> > It also
> >
> > 1. changes the return value in error case from -EACCES to
> > -EPERM
> > 2. no onger sets PF_SUPERPRIV in t->flags if the capability
> > is used.
> >
> > Do we care about these?
>
> Personally, not really, but I'll gladly put them back if you care. #2
> seems more interesting to me than number 1. I actually kinda like
> getting EPERM from caps rather than EACCES since them I know if I was
> denied by selinux or by caps.....
>
> -Eric
Yup, I asked bc I didn't particularly care myself.
I think I agree with you about -EPERM being better anyway. However I
(now) think in this case PF_SUPERPRIV definately should be set, as this
is a clear use of a capability to do something that couldn't have been
done without it.
thanks,
-serge
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists