Re: [patch] PID namespace design bug, workaround

[Ulrich Drepper <drepper@redhat.com>]

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Pavel Emelyanov wrote:
> Having access to the same IPCs in different pid namespaces won't work.
> Having access to the same filesystem in different IPC namespaces won't work.
> Having access to the same UID namespace in different VFS namespaces won't work.
> Having access to the same <any> namespace in different <many others> namespace
>  wont' work.
> [...]


Then explicitly prevent the cases which cannot work in the clone()
calls.  Yes, giving people rope to shoot themselves is a Unix tradition
but it's so unnecessary in this case and will only cause support
problems for innocent people.

I bet the result will be that if you have a separate PID namespace you
need to enforce every other namespace as well.  There are simply too
many dependencies.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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