Comment 7 for bug 1639345

Hi Roman, can you please explain the details of your exploit in more detail; e.g. how you were preparing fd=7. The ptrace part is reproducible but I'm not sure that we can reliably prevent this without fixing this in the kernel. The second part, opening a prepared fd I can't seem to reproduce but maybe I'm just missing some crucial details. It would be good if you could outline the exact steps needed to reproduce this issue.