Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps

From: Jeff Dike <jdike@xxxxxxxxxxx>
Date: Wed, 4 Oct 2006 09:41:22 -0400

On Wed, Oct 04, 2006 at 03:17:59AM +0000, David Wagner wrote:

To be honest, I still don't think you've answered Arjan's question. Ok,
so you say it is not a library and not a binary. So what is it that you
are maping in as executable, and why do you think it is reasonable to
ask the Linux kernel to allow you to execute it, if it lives on a noexec
partition?

He mentioned UML as being one thing affected by this. In this case, you
can think of it as generating code in a piece of shared memory and
then executing it. In reality, the code is read from disk rather than
being generated internally, and it's executed in a different process,
so it needs to be MAP_SHARED.

Jeff
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References:
- Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps
  - From: Arjan van de Ven
- Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps
  - From: Stas Sergeev
- Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps
  - From: David Wagner

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