26 May
2020
26 May
'20
4:20 p.m.
On Tue, May 26, 2020 at 08:48:35AM -0700, Andi Kleen wrote:
On Tue, May 26, 2020 at 08:56:18AM +0200, Greg KH wrote:
On Mon, May 25, 2020 at 10:28:48PM -0700, Andi Kleen wrote:
if (val & X86_CR4_FSGSBASE) {WARN_ONCE(1, "CR4 unexpectedly set FSGSBASE!?\n");What about those systems that panic-on-warn?
I assume they're ok with "panic on root hole"
Exactly. :) The pinning infrastructure is pretty small; will that just get backported? (Also, we can probably rework the pinning to avoid the special-casing and use a mask/value pair to notice a bit getting turned _on_ as well...)
--
Kees Cook