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From: Kassad <aashad940@gmail.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: keescook@chromium.org, kernel-hardening@lists.openwall.com
Subject: Re: Contributing to KSPP newbie
Date: Fri, 29 Nov 2019 12:32:17 -0500
Message-ID: <CA+OAcEO8TnqLTBoCUjP=-z4TCrTTHqXx4pY7mBj+FZ0pAvw8XA@mail.gmail.com> (raw)
In-Reply-To: <20191129112825.GA27873@lakrids.cambridge.arm.com>

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This might be a bit to vague but is there any task that is beginner
friendly? I did have a look at todo list and most of them look quite
daunting.


On Fri, Nov 29, 2019 at 6:29 AM Mark Rutland <mark.rutland@arm.com> wrote:

> On Thu, Nov 28, 2019 at 11:39:11PM -0500, Kassad wrote:
> > Hey Kees,
> >
> > I'm 3rd university student interested in learning more about the linux
> kernel.
> > I'm came across this subsystem, since it aligns with my interest in
> security.
> > Do you think as a newbie this task
> https://github.com/KSPP/linux/issues/11 will
> > be a good starting point?
>
> I think this specific task (Disable arm32 kuser helpers) has already
> been done, and the ticket is stale.
>
> On arm CONFIG_KUSER_HELPERS can be disabled on kernels that don't need
> to run on HW prior to ARMv6. See commit:
>
>   f6f91b0d9fd971c6 ("ARM: allow kuser helpers to be removed from the
> vector page")
>
> On arm64, CONFIG_KUSER_HELPERS can be disabled on any kernel. See
> commit:
>
>   1b3cf2c2a3f42b ("arm64: compat: Add KUSER_HELPERS config option")
>
> Thanks,
> Mark.
>

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<div><div dir="auto">This might be a bit to vague but is there any task that is beginner friendly? I did have a look at todo list and most of them look quite daunting.</div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 29, 2019 at 6:29 AM Mark Rutland &lt;<a href="mailto:mark.rutland@arm.com">mark.rutland@arm.com</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Thu, Nov 28, 2019 at 11:39:11PM -0500, Kassad wrote:<br>
&gt; Hey Kees,<br>
&gt; <br>
&gt; I&#39;m 3rd university student interested in learning more about the linux kernel.<br>
&gt; I&#39;m came across this subsystem, since it aligns with my interest in security.<br>
&gt; Do you think as a newbie this task <a href="https://github.com/KSPP/linux/issues/11" rel="noreferrer" target="_blank">https://github.com/KSPP/linux/issues/11</a> will<br>
&gt; be a good starting point?<br>
<br>
I think this specific task (Disable arm32 kuser helpers) has already<br>
been done, and the ticket is stale.<br>
<br>
On arm CONFIG_KUSER_HELPERS can be disabled on kernels that don&#39;t need<br>
to run on HW prior to ARMv6. See commit:<br>
<br>
  f6f91b0d9fd971c6 (&quot;ARM: allow kuser helpers to be removed from the vector page&quot;)<br>
<br>
On arm64, CONFIG_KUSER_HELPERS can be disabled on any kernel. See<br>
commit:<br>
<br>
  1b3cf2c2a3f42b (&quot;arm64: compat: Add KUSER_HELPERS config option&quot;)<br>
<br>
Thanks,<br>
Mark.<br>
</blockquote></div></div>

  reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-29  4:39 Kassad
2019-11-29 11:29 ` Mark Rutland
2019-11-29 17:32   ` Kassad [this message]
2019-11-30 17:11     ` Kees Cook
2019-11-30 16:48   ` Kees Cook
2019-11-30 16:54     ` Kees Cook
2019-12-02 10:47     ` Mark Rutland

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