Re: [PATCH] x86, fpu: fix 32-bit signal frame handling

2015-11-27 Thread Ingo Molnar
* Dave Hansen wrote: > On 11/10/2015 04:23 PM, Dave Hansen wrote: > > For MPX, this leads to the most permissive state and means we > > silently lose bounds violations. I think this would also mean > > that we could lose *ANY* FPU/SSE/AVX state. I'm not sure why > > no one has spotted this bug

Re: [PATCH] x86, fpu: fix 32-bit signal frame handling

2015-11-12 Thread Dave Hansen
On 11/10/2015 04:23 PM, Dave Hansen wrote: > For MPX, this leads to the most permissive state and means we > silently lose bounds violations. I think this would also mean > that we could lose *ANY* FPU/SSE/AVX state. I'm not sure why > no one has spotted this bug. FWIW, I looked at this a little