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Re: selinux breaks revisor



Jesse Keating wrote:
On Tue, 22 Jan 2008 13:29:03 +0100
"Valent Turkovic" <valent turkovic gmail com> wrote:

I tested revisor and wanted to make an up to date version of Fedora 8
Live CD - but selinux put a stop to that.

Selinux is not going to work at all for things like revisor (and
pungi/livecd-creator).  Both make use of chroots to install packages
into, and in certain cases you can wind up causing lots of harm to your
host system (installing a new policy in the chroot will actually cause
that policy to activate on the running kernel and then you have policy
that doesn't match labels, watch the fun!).

It is strongly recommended that you disable SELinux or at least put it
in permissive if you're going to be doing composes.

Would it not be possible for apps like these compose tools to use an LD_PRELOAD libselinux hack like mock used to do in order to avoid these pitfalls?

I happily use selinux in enforcing mode on my desktop and would be loathed to disable it in order to run one of these tools if I needed to do so simply because of the long time it would take to relabel my system afterwards to get it back to the state it started in. That's not to mention the obvious disadvantage from a security perspective, and the impression it gives that two of Fedora's top features (SELinux and the custom respin tools) conflict with each other.

Paul.




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