[Pkg-uml-devel] 1) noexec for shm 2) Is that a uml bug? 3) Is that rootstrap bug?

[Stefano Melchior]

On Sun, Nov 12, 2006 at 12:37:40PM +0100, Mattia Dongili wrote:
Dear all,
> On Sun, Nov 12, 2006 at 01:58:34AM +0200, shaulka at 012.net.il wrote:
> > 1) noexec for shm:
> >     =============
> >   On Wednesday, November 8, 2006, Mattia Dongili 
> > Subject: Re: [Pkg-uml-devel] Are you aware to 386945 and lkml 0609.2/1537.html
> > 
> > > The initscripts have been reverted to the old behaviour for
> > > etch already but I think the package has yet to be migrated from sid.
> > > 
> > 
> >    Still, this is only temporary:
> 
> Yes, but at least we have some time to discuss the thing upstream and
> see if it's possible to fix the kernel there instead of having to
> maintain a separate patch.
> 
> >   I only skimmed those bug reports. If I understood it correctly, the 
> > noexec flag is claimed to be a security risk.
> 
> Yes, not a very strong argument, I remeber the discussion starting with
> something like "there's no reason to have it mounted exec", not a real
> known security hole.

I was trying the patch on the 2.6.18 and I have the mail ready to be sent
to uml-devel mailing list. It would be better if they include the patch
than we provide a specific patch for it in the package, isn't? I don't
think it will be ready for Etch release, since the "sysvinit" team tried a
compromise to allow UML and dosemu not in occurring in a package breakage.
The sysvinit-2.86.ds1-28 helps us to find the time for a dialogue with
uml upstremers. Today I shall ask them support.
> 
> > 2) Is the following a uml bug?
> >    ======================
> >   By  taking sysvinit from sid I managed to get rootstrap running. However
> > now I believe my first problem is the following:
> > 
> > $ grep -A21 Failed rootstrap.log
> > Failed to open 'root_fs', errno = 2
> >  ubdb: unknown partition table
> > VFS: Mounted root (hostfs filesystem) readonly.
> > builder running...
> > idr_remove called for id=2 which is not allocated.
> > 0891ba10:  [<0805d048>] dump_stack+0x1c/0x20
> [...]
> > 
> >   It looks as if the lines starting with `idr_remove' get repeated 2 more times
> > (haven't carefully compared the text).
> 
> this should be harmless. Most probably due to the fact we are using a
> python script as the init process.
> 
> > 3) Is the following a rootstrap bug? 
> >    ==========================
> >   I used rootstrap -o option. I do have more problems with uml,  such as setting
> > the network. Still, I got a shell. However the shell prompt, `sh-3.1# ', as well as
> > my keystrokes and the output of the commands were only printed to the log file.
> > I was expecting it to appear on the tty too. Is that related to the previous oops?
> > Is that a rootstrap bug?
> 
> yup. Yes, this is a rootstrap bug :)
> We need to take more care with debug=1 and the -o option set.
Uhmmm, not a good thing!
Cheers

SteX
-- 
Stefano Melchior, GPG key = D52DF829 - <stefano.melchior at openlabs.it>
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