Re: [PATCH 18/27] bpf: Restrict kernel image access functions when the kernel is locked down
From: joeyli <hidden>
Date: 2017-10-25 07:07:47
Also in:
linux-efi, linux-security-module, lkml
On Mon, Oct 23, 2017 at 03:53:00PM +0100, David Howells wrote:
jlee-IBi9RG/b67k@public.gmane.org wrote:quoted
hm... patch 4 only prevents write_mem() but not read_mem(). Or I missed anything?Actually, yes, as it happens, patch 11 prevents you from even opening /dev/mem and /dev/kmem by locking down open of /dev/port. So I've moved this bit to patch 4, simplified and posted a new variant for patch 4.
Thank you for pointing out! Joey Lee