Date: Sat, 30 Nov 2019 08:54:07 -0800 From: Kees Cook <keescook@...omium.org> To: Mark Rutland <mark.rutland@....com> Cc: Kassad <aashad940@...il.com>, kernel-hardening@...ts.openwall.com Subject: Re: Contributing to KSPP newbie On Sat, Nov 30, 2019 at 08:48:23AM -0800, Kees Cook wrote: > On Fri, Nov 29, 2019 at 11:29:13AM +0000, Mark Rutland 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. > > Oh, thank you! I entirely missed both of these commits. I've added > notes to the bug and closed it. > > > > > 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") > > (Typo: a1b3cf2c2a3f42b) Typo typo: af1b3cf2c2a3f42bbb680812ff1bbd715ac8af69 > > -Kees > > > > > Thanks, > > Mark. > > -- > Kees Cook -- Kees Cook
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