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) -Kees > > Thanks, > Mark. -- Kees Cook
