Re: [RFC] Privilege escalation in filesystems

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On Thu, Aug 10, 2006 at 11:06:48AM -0700, Bryan Henderson wrote:
> >Much like NFS, at times Unionfs has to perform operations as another 
> user.
> >...
> >If the foo is owned by someone else and we don't have write permission to
> >it, we'll fail to remove the opaque whiteout from foo (.wh.__dir_opaque),
> >which would in turn prevent us from removing foo itself. If we become a
> >superuser temporarily, we can remove the whiteout as well as the 
> directory,
> >and all is well.
> 
> What you're describing is not a need to perform operations as another 
> user, but a need to perform them with DAC_OVERRIDE capability.

Thanks! I'll look into it.

Josef "Jeff" Sipek.

-- 
Penguin : Linux version 2.4.20-46.9.legacysmp on an i686 machine (2785.28 BogoMips).
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