[CRIU] crash in pb_read_one?

[Tycho Andersen]

Hi Pavel,

On Tue, Sep 16, 2014 at 02:50:09PM -0500, Tycho Andersen wrote:
> 
> Yes, this is very sticky.

I think I've finally gotten it to a state where I understand
everything about the synchronization. I am having problems using
rst_mem_alloc and friends, though. The top two patches here are the
ones that are causing problems:

https://github.com/tych0/criu/commits/missing-pid

The one that segfaults is (I think?) closer to the right way to do
things, but the pointer in task_args is bad, so when we call
wait_helpers it segfaults.

Any thoughts are much appreciated,

Tycho