Re: RFC/PATCH: Random pid generation

[Peter Samuelson]

[Chris Evans]
> A 32 bit pid_t is more interesting (and plausible). Assuming a
> _signed_ pid_t, a rather high rate of 1000 exploit attempts/second,
> and a 100% race success when the right pid is guessed

Depends.  Any time between the fork() and the open("/tmp/$$"), you are
visible in /proc.  If that amount of time is significant, no amount of
PID randomness will save you.

Peter