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Date:	Tue, 6 Oct 2015 16:49:37 +0200
From:	Ingo Molnar <>
To:	Arjan van de Ven <>
Subject: Re: [tip:x86/mm] x86/mm: Warn on W^X mappings

* Arjan van de Ven <> wrote:

> On 10/6/2015 2:54 AM, tip-bot for Stephen Smalley wrote:
> >Commit-ID:  e1a58320a38dfa72be48a0f1a3a92273663ba6db
> >Gitweb:
> >Author:     Stephen Smalley <>
> >AuthorDate: Mon, 5 Oct 2015 12:55:20 -0400
> >Committer:  Ingo Molnar <>
> >CommitDate: Tue, 6 Oct 2015 11:11:48 +0200
> >
> >x86/mm: Warn on W^X mappings
> >
> >Warn on any residual W+X mappings after setting NX
> >if DEBUG_WX is enabled.  Introduce a separate
> >X86_PTDUMP_CORE config that enables the code for
> >dumping the page tables without enabling the debugfs
> >interface, so that DEBUG_WX can be enabled without
> >exposing the debugfs interface.  Switch EFI_PGT_DUMP
> >to using X86_PTDUMP_CORE so that it also does not require
> >enabling the debugfs interface.
> I like it, so Acked-by: Arjan van de Ven <>
> I also have/had an old userland script to do similar checks but using the 
> debugfs interface... ... would that be useful to have somewhere more central?

Sure, I think it could be put into tools/testing/selftests/x86/.


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