On Tue, 2020-02-25 at 13:10 -0800, Kees Cook wrote: > On Wed, Feb 05, 2020 at 10:19:26AM -0800, Yu-cheng Yu wrote: > > WRUSS is a new kernel-mode instruction but writes directly to user Shadow > > Stack (SHSTK) memory. This is used to construct a return address on SHSTK > > for the signal handler. > > > > This instruction can fault if the user SHSTK is not valid SHSTK memory. > > In that case, the kernel does a fixup. > > Since these functions aren't used in this patch, should this get merged > with patch 19? Yes, I can do that. Yu-cheng
