Re: [PATCH 00/17] ARMv8.3 pointer authentication support

2018-11-13 Thread Kees Cook
On Tue, Nov 13, 2018 at 10:17 AM, Kristina Martsenko wrote: > When the PAC authentication fails, it doesn't actually generate an > exception, it just flips a bit in the high-order bits of the pointer, > making the pointer invalid. Then when the pointer is dereferenced (e.g. > as a function return

Re: [PATCH 00/17] ARMv8.3 pointer authentication support

2018-11-13 Thread Kristina Martsenko
(Sorry for the really late response!) On 15/10/2018 23:42, Kees Cook wrote: > On Fri, Oct 5, 2018 at 1:47 AM, Kristina Martsenko > wrote: >> This series adds support for the ARMv8.3 pointer authentication >> extension. The series contains Mark's original patches to enable pointer >> authenticatio

Re: [PATCH v3 2/7] arm64/kvm: context-switch ptrauth registers

2018-11-13 Thread Christoffer Dall
On Mon, Nov 12, 2018 at 10:32:12PM +, Catalin Marinas wrote: > On Fri, Nov 02, 2018 at 09:37:25AM +0100, Christoffer Dall wrote: > > On Wed, Oct 17, 2018 at 04:17:55PM +0530, Amit Daniel Kachhap wrote: > > > From: Mark Rutland > > > > > > When pointer authentication is supported, a guest may