Re: [seL4] Progress of bringing Genode to seL4

Tim already found it, but just for those on the list who haven’t read the article: this paragraph is about how traditional L4 kernels did this, as opposed to seL4, which doesn’t have the problem (nor a mapping database). Cheers, Gerwin

On 11.03.2015, at 04:02, Tim Newsham wrote:

Your article says: "Second, the mapping database keeps records about how mappings got established. Thereby, the memory required for storing this information in the kernel depends on the behaviour of the user land. As a consequence, a malicious user-level program is able to provoke a high consumption of kernel memory by establishing mappings. Eventually, this represents an attack vector for denial-of-service attacks onto the kernel."

Is this right? I thought that the callers have to provide the resources that get consumed by the kernel to perform system calls. Is this not the case in this situation?

On Tue, Mar 10, 2015 at 2:20 AM, Norman Feske wrote:

...

Hello,

I went a bit further with bringing seL4 and Genode together. The following article describes a series of small experiments with the kernel's IPC mechanism and the management of virtual memory.

http://genode.org/documentation/articles/sel4_part_2

The steps described in the article can be reproduced via my corresponding topic branch, which I have just rebased on top of Genode's master branch:

https://github.com/nfeske/genode/commits/sel4

Cheers Norman

On 10/30/2014 01:26 PM, Norman Feske wrote:

...

Hello,

I have written up the first of a series of articles about using seL4 as base platform for the Genode OS framework:

http://genode.org/documentation/articles/sel4_part_1

I hope that it contains useful bits of information for novices of seL4 and Genode alike. Even though the article outlines a few hurdles, the overall experience of using the kernel had been overly positive so far.

For those of you interested in tracking the progress of the ongoing work, here is the corresponding topic branch:

https://github.com/nfeske/genode/commits/sel4

Cheers Norman

-- Dr.-Ing. Norman Feske Genode Labs

http://www.genode-labs.com · http://genode.org

Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth

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