linux-kernel - Re: 2.6.27-rc1: strange fstab issue (Re: 2.6.27-rc1 + selinux new options = no httpd)

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Message-Id: <1217598479.2980.4.camel@localhost.localdomain>
Date:	Fri, 01 Aug 2008 09:47:59 -0400
From:	Eric Paris <eparis@...hat.com>
To:	Gene Heskett <gene.heskett@...il.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	James Morris <jmorris@...ei.org>, linux-kernel@...r.kernel.org,
	Stephen Smalley <sds@...ho.nsa.gov>, aviro@...hat.com
Subject: Re: 2.6.27-rc1: strange fstab issue (Re: 2.6.27-rc1 + selinux new
	options = no httpd)

On Fri, 2008-08-01 at 09:39 -0400, Gene Heskett wrote:
> On Thursday 31 July 2008, Rafael J. Wysocki wrote:
> Update by Gene below.
> >On Thursday, 31 of July 2008, James Morris wrote:
> >> On Thu, 31 Jul 2008, Gene Heskett wrote:
> >> > >Which new options?
> >> >
> >> > Make xconfig-->security options:
> >> >
> >> > XFRM Networking security hooks
> >> >
> >> >  and several others just below it.  Unforch, I can't copy/paste the
> >> > screen.
> >>
> >> I can't really imagine what that is (although if you enable the secmark
> >> controls under the main SELinux menu, which are disabled by default,
> >> there could be problems).
> >
> >On a possibly related note, I've been observing a strange issue on one of
> >my test boxes with OpenSUSE 10.3 recently.   Namely, the fsck complains
> >that there's no passno value in the fstab, although it obviously is present.
> >
> >Strangely enough, if the kernel is compiled with CONFIG_SECURITY_SELINUX
> > unset, the fsck doesn't complain about the missing passno field any more.
> >
> >Thanks,
> >Rafael
> 
> I just did a 2.6.27-rc1 rebuild on a pure, all defaults 'make oldconfig' from
> my 2.6.26 final .config moved to that src tree.
> 
> httpd is still being denied access to its log files and dies during the bootup.
> 
> This is a showstopper for me.

Stephen Smalley just sent me a private note.  Apparently he is having
e-mail trouble but he did point out the most likely problem.  Can you
add the patch from

http://marc.info/?l=linux-kernel&m=121726661110266&w=2

And give it a whirl?  Sorry, but we think the problem is that the VFS
stopped passing all of the relevant information down to the security
system.  https is only allowed to append to its log files, not actually
'write.'  Since the VFS is longer differentiating those two operations
you are getting then denial for write.

I'll try to get this pushed into linus's tree quickly.

-Eric

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