Re: [Xen-devel] [PATCH] x86: (allow to) override LIST_POISON*

2014-11-14 Thread Andrew Cooper
On 14/11/14 14:52, Jan Beulich wrote: > Having these point into space not controlled by the hypervisor provides > an unnecessary attack surface. Allow architectures to override them and > utilize that override to make them non-canonical addresses (thus > causing #GP rather than #PF when dereference

[Xen-devel] [PATCH] x86: (allow to) override LIST_POISON*

2014-11-14 Thread Jan Beulich
Having these point into space not controlled by the hypervisor provides an unnecessary attack surface. Allow architectures to override them and utilize that override to make them non-canonical addresses (thus causing #GP rather than #PF when dereferenced). Suggested-by: Andrew Cooper Signed-off-b