On Sat, Jun 28, 2014 at 1:25 PM, Alexei Starovoitov [off-list ref] wrote:

On Sat, Jun 28, 2014 at 9:01 AM, Andy Lutomirski [off-list ref] wrote:

quoted

On Fri, Jun 27, 2014 at 5:06 PM, Alexei Starovoitov [off-list ref] wrote:

quoted

Safety of eBPF programs is statically determined by the verifier, which detects:

This is a very high-level review.  I haven't tried to read all the
code yet, and this is mostly questions rather than real comments.

These were great questions! I hope I answered them. If not, please
continue asking.

I have plenty more questions, but here's one right now: does anything
prevent programs from using pointers in comparisons, returning
pointers, or otherwise figuring out the value of a pointer?  If so, I
think it would be worthwhile to prevent that so that eBPF programs
can't learn kernel addresses.

--Andy