Re: [PATCH 3.16 045/305] x86/speculation: Apply IBPB more strictly to avoid cross-process data leak

2019-02-04 Thread Ben Hutchings
On Sun, 2019-02-03 at 13:37 -0800, Andi Kleen wrote: > On Sun, Feb 03, 2019 at 08:05:53PM +0100, Jiri Kosina wrote: > > On Sun, 3 Feb 2019, Ben Hutchings wrote: > > > > > 3.16.63-rc1 review patch. If anyone has any objections, please let me > > > know. > > > > > > -- > > > > >

Re: [PATCH 3.16 045/305] x86/speculation: Apply IBPB more strictly to avoid cross-process data leak

2019-02-03 Thread Andi Kleen
On Sun, Feb 03, 2019 at 08:05:53PM +0100, Jiri Kosina wrote: > On Sun, 3 Feb 2019, Ben Hutchings wrote: > > > 3.16.63-rc1 review patch. If anyone has any objections, please let me know. > > > > -- > > > > From: Jiri Kosina > > > > commit

Re: [PATCH 3.16 045/305] x86/speculation: Apply IBPB more strictly to avoid cross-process data leak

2019-02-03 Thread Jiri Kosina
On Sun, 3 Feb 2019, Ben Hutchings wrote: > 3.16.63-rc1 review patch. If anyone has any objections, please let me know. > > -- > > From: Jiri Kosina > > commit dbfe2953f63c640463c630746cd5d9de8b2f63ae upstream. You really want the whole IBPB+STIBP revamp from upstream,

[PATCH 3.16 045/305] x86/speculation: Apply IBPB more strictly to avoid cross-process data leak

2019-02-03 Thread Ben Hutchings
3.16.63-rc1 review patch. If anyone has any objections, please let me know. -- From: Jiri Kosina commit dbfe2953f63c640463c630746cd5d9de8b2f63ae upstream. Currently, IBPB is only issued in cases when switching into a non-dumpable process, the rationale being to protect such