FW: Linux Virtual Server/Secure Context procfs shared permissions flaw

Roberto Nibali ratz at tac.ch
Wed Jul 7 19:39:31 BST 2004

Hi Peter,

> Can anyone confirm this?

Yes. Check out:


> I don't see anything in the mailing list or
> kernel changelogs.  E.g.,
> http://www.kernel.org/pub/linux/kernel/v2.4/testing/patch-2.4.27.log.

It's because VServer is not part of the official kernel ;).

>>Linux Virtual Server extends the Linux kernel to provide the 
>>ability to
>>run several virtual servers on a single host system. In contrast to
>>other virtualization attempts Linux Virtual Server uses a split-
>>userland architechture under a single kernel to optimize 
>>sharing of all
>>resources and reduce resource consumption overhead per VM to the
>>absolute minimum.

Check the URL again. It's also a very nice project except all the syscalls 
introduced ;).

Roberto Nibali, ratz
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