Messages in this thread | | | Date | Wed, 25 Oct 2017 15:07:30 +0800 | From | joeyli <> | Subject | Re: [PATCH 18/27] bpf: Restrict kernel image access functions when the kernel is locked down |
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On Mon, Oct 23, 2017 at 03:53:00PM +0100, David Howells wrote: > jlee@suse.com wrote: > > > 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
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