Re: [PATCH] new setprocuid syscall

[Peter Samuelson <peter _at_ cadcamlab.org>]

  [Peter Samuelson]
> > Race -- you need to make sure the task_struct doesn't disappear out
> > from under you.
> > 
> > Anyway, why not use the interface 'chown uid /proc/pid'?  No new
> > syscall, no arch-dependent part, no user-space tool, etc.

[Martin Dalecki]
> Becouse of exactly the same race condition as above maybe?

OK then, what is the right way to make sure a task doesn't disappear?
I assumed 'read_lock (&tasklist_lock)' was enough, from reading other
code.

Peter
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