I have exploit code -- took me about 5 hours to write after Theo announced all the important details of the vulnerability. I'm not going to publish it yet, though.
AFAIK other systems aren't affected -- is lazy context switching even a thing on them? The fundamental issue here is that one process' data is still in registers when another process is running and we've been relying on getting a trap to tell us when we need to restore the correct FP state.
AFAIK other systems aren't affected -- is lazy context switching even a thing on them? The fundamental issue here is that one process' data is still in registers when another process is running and we've been relying on getting a trap to tell us when we need to restore the correct FP state.